gcc/configure.ac

   1 # configure.ac for GCC
   2 # Process this file with autoconf to generate a configuration script.
   3
   4 # Copyright (C) 1997-2022 Free Software Foundation, Inc.
   5
   6 #This file is part of GCC.
   7
   8 #GCC is free software; you can redistribute it and/or modify it under
   9 #the terms of the GNU General Public License as published by the Free
  10 #Software Foundation; either version 3, or (at your option) any later
  11 #version.
  12
  13 #GCC is distributed in the hope that it will be useful, but WITHOUT
  14 #ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 #FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 #for more details.
  17
  18 #You should have received a copy of the GNU General Public License
  19 #along with GCC; see the file COPYING3.  If not see
  20 #<http://www.gnu.org/licenses/>.
  21
  22 # --------------------------------
  23 # Initialization and sanity checks
  24 # --------------------------------
  25
  26 AC_INIT
  27 AC_CONFIG_SRCDIR(tree.cc)
  28 AC_CONFIG_HEADER(auto-host.h:config.in)
  29
  30 gcc_version=`cat $srcdir/BASE-VER`
  31
  32 # Determine the host, build, and target systems
  33 AC_CANONICAL_BUILD
  34 AC_CANONICAL_HOST
  35 AC_CANONICAL_TARGET
  36
  37 # Determine the noncanonical host name, for Ada.
  38 ACX_NONCANONICAL_HOST
  39
  40 # Determine the noncanonical target name, for directory use.
  41 ACX_NONCANONICAL_TARGET
  42
  43 # Used for constructing correct paths for offload compilers.
  44 real_target_noncanonical=${target_noncanonical}
  45 accel_dir_suffix=
  46
  47 # Determine the target- and build-specific subdirectories
  48 GCC_TOPLEV_SUBDIRS
  49
  50 # Set program_transform_name
  51 AC_ARG_PROGRAM
  52
  53 # Check for bogus environment variables.
  54 # Test if LIBRARY_PATH contains the notation for the current directory
  55 # since this would lead to problems installing/building glibc.
  56 # LIBRARY_PATH contains the current directory if one of the following
  57 # is true:
  58 # - one of the terminals (":" and ";") is the first or last sign
  59 # - two terminals occur directly after each other
  60 # - the path contains an element with a dot in it
  61 AC_MSG_CHECKING(LIBRARY_PATH variable)
  62 changequote(,)dnl
  63 case ${LIBRARY_PATH} in
  64   [:\;]* | *[:\;] | *[:\;][:\;]* |  *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
  65     library_path_setting="contains current directory"
  66     ;;
  67   *)
  68     library_path_setting="ok"
  69     ;;
  70 esac
  71 changequote([,])dnl
  72 AC_MSG_RESULT($library_path_setting)
  73 if test "$library_path_setting" != "ok"; then
  74 AC_MSG_ERROR([
  75 *** LIBRARY_PATH shouldn't contain the current directory when
  76 *** building gcc. Please change the environment variable
  77 *** and run configure again.])
  78 fi
  79
  80 # Test if GCC_EXEC_PREFIX contains the notation for the current directory
  81 # since this would lead to problems installing/building glibc.
  82 # GCC_EXEC_PREFIX contains the current directory if one of the following
  83 # is true:
  84 # - one of the terminals (":" and ";") is the first or last sign
  85 # - two terminals occur directly after each other
  86 # - the path contains an element with a dot in it
  87 AC_MSG_CHECKING(GCC_EXEC_PREFIX variable)
  88 changequote(,)dnl
  89 case ${GCC_EXEC_PREFIX} in
  90   [:\;]* | *[:\;] | *[:\;][:\;]* |  *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
  91     gcc_exec_prefix_setting="contains current directory"
  92     ;;
  93   *)
  94     gcc_exec_prefix_setting="ok"
  95     ;;
  96 esac
  97 changequote([,])dnl
  98 AC_MSG_RESULT($gcc_exec_prefix_setting)
  99 if test "$gcc_exec_prefix_setting" != "ok"; then
 100 AC_MSG_ERROR([
 101 *** GCC_EXEC_PREFIX shouldn't contain the current directory when
 102 *** building gcc. Please change the environment variable
 103 *** and run configure again.])
 104 fi
 105
 106 # -----------
 107 # Directories
 108 # -----------
 109
 110 # Specify the local prefix
 111 local_prefix=
 112 AC_ARG_WITH(local-prefix,
 113 [AS_HELP_STRING([--with-local-prefix=DIR],
 114                 [specifies directory to put local include])],
 115 [case "${withval}" in
 116 yes)    AC_MSG_ERROR(bad value ${withval} given for local include directory prefix) ;;
 117 no)     ;;
 118 *)      local_prefix=$with_local_prefix ;;
 119 esac])
 120
 121 # Default local prefix if it is empty
 122 if test x$local_prefix = x; then
 123         local_prefix=/usr/local
 124 fi
 125
 126 AC_ARG_WITH([native-system-header-dir],
 127   [  --with-native-system-header-dir=dir
 128                           use dir as the directory to look for standard
 129                           system header files in.  Defaults to /usr/include.],
 130 [
 131  case ${with_native_system_header_dir} in
 132  yes|no) AC_MSG_ERROR([bad value ${withval} given for --with-native-system-header-dir]) ;;
 133  /* | [[A-Za-z]]:[[\\/]]*) ;;
 134  *) AC_MSG_ERROR([--with-native-system-header-dir argument ${withval} must be an absolute directory]) ;;
 135  esac
 136  configured_native_system_header_dir="${withval}"
 137 ], [configured_native_system_header_dir=])
 138
 139 AC_ARG_WITH(build-sysroot,
 140   [AS_HELP_STRING([--with-build-sysroot=sysroot],
 141                   [use sysroot as the system root during the build])],
 142   [if test x"$withval" != x ; then
 143      SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
 144    fi],
 145   [SYSROOT_CFLAGS_FOR_TARGET=])
 146 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
 147
 148 if test "x$prefix" = xNONE; then
 149  test_prefix=/usr/local
 150 else
 151  test_prefix=$prefix
 152 fi
 153 if test "x$exec_prefix" = xNONE; then
 154  test_exec_prefix=$test_prefix
 155 else
 156  test_exec_prefix=$exec_prefix
 157 fi
 158
 159 AC_ARG_WITH(sysroot,
 160 [AS_HELP_STRING([[--with-sysroot[=DIR]]],
 161                 [search for usr/lib, usr/include, et al, within DIR])],
 162 [
 163  case ${with_sysroot} in
 164  /) ;;
 165  */) with_sysroot=`echo $with_sysroot | sed 's,/$,,'` ;;
 166  esac
 167  case ${with_sysroot} in
 168  yes) TARGET_SYSTEM_ROOT='${exec_prefix}/${target_noncanonical}/sys-root' ;;
 169  *) TARGET_SYSTEM_ROOT=$with_sysroot ;;
 170  esac
 171
 172  TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"$(TARGET_SYSTEM_ROOT)\"'
 173  CROSS_SYSTEM_HEADER_DIR='$(TARGET_SYSTEM_ROOT)$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
 174
 175  case ${TARGET_SYSTEM_ROOT} in
 176  "${test_prefix}"|"${test_prefix}/"*|\
 177  "${test_exec_prefix}"|"${test_exec_prefix}/"*|\
 178  '${prefix}'|'${prefix}/'*|\
 179  '${exec_prefix}'|'${exec_prefix}/'*)
 180    t="$TARGET_SYSTEM_ROOT_DEFINE -DTARGET_SYSTEM_ROOT_RELOCATABLE"
 181    TARGET_SYSTEM_ROOT_DEFINE="$t"
 182    ;;
 183  esac
 184 ], [
 185  TARGET_SYSTEM_ROOT=
 186  TARGET_SYSTEM_ROOT_DEFINE=
 187  CROSS_SYSTEM_HEADER_DIR='$(gcc_tooldir)/sys-include'
 188 ])
 189 AC_SUBST(TARGET_SYSTEM_ROOT)
 190 AC_SUBST(TARGET_SYSTEM_ROOT_DEFINE)
 191 AC_SUBST(CROSS_SYSTEM_HEADER_DIR)
 192
 193 # Don't set gcc_gxx_include_dir to gxx_include_dir since that's only
 194 # passed in by the toplevel make and thus we'd get different behavior
 195 # depending on where we built the sources.
 196 gcc_gxx_include_dir=
 197 # Specify the g++ header file directory
 198 AC_ARG_WITH(gxx-include-dir,
 199 [AS_HELP_STRING([--with-gxx-include-dir=DIR],
 200                 [specifies directory to put g++ header files])],
 201 [case "${withval}" in
 202 yes)    AC_MSG_ERROR(bad value ${withval} given for g++ include directory) ;;
 203 no)     ;;
 204 *)      gcc_gxx_include_dir=$with_gxx_include_dir ;;
 205 esac])
 206
 207 # If both --with-sysroot and --with-gxx-include-dir are passed, we interpolate
 208 # the former in the latter and, upon success, compute gcc_gxx_include_dir as
 209 # relative to the sysroot.
 210 gcc_gxx_include_dir_add_sysroot=0
 211
 212 # This logic must match libstdc++-v3/acinclude.m4:GLIBCXX_EXPORT_INSTALL_INFO.
 213 if test x${gcc_gxx_include_dir} = x; then
 214   if test x${enable_version_specific_runtime_libs} = xyes; then
 215     gcc_gxx_include_dir='${libsubdir}/include/c++'
 216   else
 217     libstdcxx_incdir='include/c++/$(version)'
 218     if test x$host != x$target; then
 219        libstdcxx_incdir="$target_alias/$libstdcxx_incdir"
 220     fi
 221     gcc_gxx_include_dir="\$(libsubdir)/\$(libsubdir_to_prefix)$libstdcxx_incdir"
 222   fi
 223 elif test "${with_sysroot+set}" = set; then
 224   gcc_gxx_without_sysroot=`expr "${gcc_gxx_include_dir}" : "${with_sysroot}"'\(.*\)'`
 225   if test "${gcc_gxx_without_sysroot}"; then
 226     gcc_gxx_include_dir="${gcc_gxx_without_sysroot}"
 227     gcc_gxx_include_dir_add_sysroot=1
 228   fi
 229 fi
 230
 231 # Configuration for an alternate set of C++ headers.
 232 gcc_gxx_libcxx_include_dir=
 233 # Specify the alternate g++ header file directory
 234 AC_ARG_WITH(gxx-libcxx-include-dir,
 235 [AS_HELP_STRING([--with-gxx-libcxx-include-dir=DIR],
 236                 [specifies directory to find libc++ header files])],
 237 [case "${withval}" in
 238 yes)    AC_MSG_ERROR(bad value ${withval} given for libc++ include directory) ;;
 239 no)     ;;
 240 *)      gcc_gxx_libcxx_include_dir=$with_gxx_libcxx_include_dir ;;
 241 esac])
 242
 243 # If both --with-sysroot and --with-gxx-libcxx-include-dir are passed, we
 244 # check to see if the latter starts with the former and, upon success, compute
 245 # gcc_gxx_libcxx_include_dir as relative to the sysroot.
 246 gcc_gxx_libcxx_include_dir_add_sysroot=0
 247
 248 if test x${gcc_gxx_libcxx_include_dir} != x; then
 249   AC_DEFINE(ENABLE_STDLIB_OPTION, 1,
 250             [Define if the -stdlib= option should be enabled.])
 251 else
 252   AC_DEFINE(ENABLE_STDLIB_OPTION, 0)
 253 fi
 254 # ??? This logic must match libstdc++-v3/acinclude.m4:GLIBCXX_EXPORT_INSTALL_INFO.
 255 if test x${gcc_gxx_libcxx_include_dir} = x; then
 256   if test x${enable_version_specific_runtime_libs} = xyes; then
 257     gcc_gxx_libcxx_include_dir='${libsubdir}/libc++_include/c++/v1'
 258   else
 259     libcxx_incdir='libc++_include/c++/$(version)/v1'
 260     if test x$host != x$target; then
 261        libcxx_incdir="$target_alias/$libcxx_incdir"
 262     fi
 263     gcc_gxx_libcxx_include_dir="\$(libsubdir)/\$(libsubdir_to_prefix)$libcxx_incdir"
 264   fi
 265 elif test "${with_sysroot+set}" = set; then
 266   gcc_gxx_libcxx_without_sysroot=`expr "${gcc_gxx_libcxx_include_dir}" : "${with_sysroot}"'\(.*\)'`
 267   if test "${gcc_gxx_libcxx_without_sysroot}"; then
 268     gcc_gxx_libcxx_include_dir="${gcc_gxx_libcxx_without_sysroot}"
 269     gcc_gxx_libcxx_include_dir_add_sysroot=1
 270   fi
 271 fi
 272
 273 AC_ARG_WITH(cpp_install_dir,
 274 [AC_HELP_STRING([--with-cpp-install-dir=DIR],
 275                 [install the user visible C preprocessor in DIR
 276                  (relative to PREFIX) as well as PREFIX/bin])],
 277 [if test x$withval = xyes; then
 278   AC_MSG_ERROR([option --with-cpp-install-dir requires an argument])
 279 elif test x$withval != xno; then
 280   cpp_install_dir=$withval
 281 fi])
 282
 283 # We would like to our source tree to be readonly.  However when releases or
 284 # pre-releases are generated, the flex/bison generated files as well as the
 285 # various formats of manuals need to be included along with the rest of the
 286 # sources.  Therefore we have --enable-generated-files-in-srcdir to do
 287 # just that.
 288
 289 AC_MSG_CHECKING([whether to place generated files in the source directory])
 290   dnl generated-files-in-srcdir is disabled by default
 291   AC_ARG_ENABLE(generated-files-in-srcdir,
 292     [AS_HELP_STRING([--enable-generated-files-in-srcdir],
 293                     [put copies of generated files in source dir
 294                      intended for creating source tarballs for users
 295                      without texinfo bison or flex])],
 296       generated_files_in_srcdir=$enableval,
 297       generated_files_in_srcdir=no)
 298
 299 AC_MSG_RESULT($generated_files_in_srcdir)
 300
 301 if test "$generated_files_in_srcdir" = "yes"; then
 302   GENINSRC=''
 303 else
 304   GENINSRC='#'
 305 fi
 306 AC_SUBST(GENINSRC)
 307
 308 # -------------------
 309 # Find default linker
 310 # -------------------
 311
 312 # With GNU ld
 313 AC_ARG_WITH(gnu-ld,
 314 [AS_HELP_STRING([--with-gnu-ld], [arrange to work with GNU ld])],
 315 gnu_ld_flag="$with_gnu_ld",
 316 gnu_ld_flag=no)
 317
 318 case $target in
 319     *darwin*)
 320         ld64_flag=yes # Darwin can only use a ld64-compatible linker.
 321         dsymutil_flag=yes # Darwin uses dsymutil to link debug.
 322         ;;
 323     *)
 324         ld64_flag=no
 325         dsymutil_flag=no
 326         ;;
 327 esac
 328
 329 # With pre-defined ld
 330 AC_ARG_WITH(ld,
 331 [AS_HELP_STRING([--with-ld], [arrange to use the specified ld (full pathname)])],
 332 DEFAULT_LINKER="$with_ld")
 333 if test x"${DEFAULT_LINKER+set}" = x"set"; then
 334   if test ! -x "$DEFAULT_LINKER"; then
 335     AC_MSG_ERROR([cannot execute: $DEFAULT_LINKER: check --with-ld or env. var. DEFAULT_LINKER])
 336   elif $DEFAULT_LINKER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
 337     gnu_ld_flag=yes
 338   elif $DEFAULT_LINKER -v < /dev/null 2>&1 | grep ld64- > /dev/null; then
 339     ld64_flag=yes
 340   fi
 341   AC_DEFINE_UNQUOTED(DEFAULT_LINKER,"$DEFAULT_LINKER",
 342         [Define to enable the use of a default linker.])
 343 fi
 344
 345 AC_MSG_CHECKING([whether a default linker was specified])
 346 if test x"${DEFAULT_LINKER+set}" = x"set"; then
 347   if test x"$gnu_ld_flag" = x"no"; then
 348     AC_MSG_RESULT([yes ($DEFAULT_LINKER)])
 349   else
 350     AC_MSG_RESULT([yes ($DEFAULT_LINKER - GNU ld)])
 351   fi
 352 else
 353   AC_MSG_RESULT(no)
 354 fi
 355
 356 # With demangler in GNU ld
 357 AC_ARG_WITH(demangler-in-ld,
 358 [AS_HELP_STRING([--with-demangler-in-ld], [try to use demangler in GNU ld])],
 359 demangler_in_ld="$with_demangler_in_ld",
 360 demangler_in_ld=yes)
 361
 362 # Allow the user to specify a dsymutil executable (used on Darwin only, so far)
 363 AC_ARG_WITH(dsymutil,
 364 [AS_HELP_STRING([--with-dsymutil], [arrange to use the specified dsymutil (full pathname)])],
 365 DEFAULT_DSYMUTIL="$with_dsymutil")
 366
 367 dsymutil_vers=
 368 if test x"${DEFAULT_DSYMUTIL+set}" = x"set"; then
 369   if test ! -x "$DEFAULT_DSYMUTIL"; then
 370     AC_MSG_ERROR([cannot execute: $DEFAULT_DSYMUTIL: check --with-dsymutil or env. var. DEFAULT_DSYMUTIL])
 371   else
 372     if dsymutil_vers=`$DEFAULT_DSYMUTIL -v /dev/null 2>&1`; then
 373       dsymutil_flag=yes
 374     fi
 375   fi
 376   AC_DEFINE_UNQUOTED(DEFAULT_DSYMUTIL,"$DEFAULT_DSYMUTIL",
 377         [Define to enable the use of a default debug linker.])
 378 fi
 379
 380 AC_MSG_CHECKING([whether a default dsymutil was specified])
 381 if test x"${DEFAULT_DSYMUTIL+set}" = x"set"; then
 382   AC_MSG_RESULT([yes ($DEFAULT_DSYMUTIL)])
 383 else
 384   AC_MSG_RESULT(no)
 385 fi
 386
 387 # ----------------------
 388 # Find default assembler
 389 # ----------------------
 390
 391 # With GNU as
 392 AC_ARG_WITH(gnu-as,
 393 [AS_HELP_STRING([--with-gnu-as], [arrange to work with GNU as])],
 394 gas_flag="$with_gnu_as",
 395 gas_flag=no)
 396
 397 AC_ARG_WITH(as,
 398 [AS_HELP_STRING([--with-as], [arrange to use the specified as (full pathname)])],
 399 DEFAULT_ASSEMBLER="$with_as")
 400 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
 401   if test ! -x "$DEFAULT_ASSEMBLER"; then
 402     AC_MSG_ERROR([cannot execute: $DEFAULT_ASSEMBLER: check --with-as or env. var. DEFAULT_ASSEMBLER])
 403   elif $DEFAULT_ASSEMBLER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
 404     gas_flag=yes
 405   fi
 406   AC_DEFINE_UNQUOTED(DEFAULT_ASSEMBLER,"$DEFAULT_ASSEMBLER",
 407         [Define to enable the use of a default assembler.])
 408 fi
 409
 410 AC_MSG_CHECKING([whether a default assembler was specified])
 411 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
 412   if test x"$gas_flag" = x"no"; then
 413     AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER)])
 414   else
 415     AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER - GNU as)])
 416   fi
 417 else
 418   AC_MSG_RESULT(no)
 419 fi
 420
 421 # ---------------
 422 # Find C compiler
 423 # ---------------
 424
 425 # If a non-executable a.out is present (e.g. created by GNU as above even if
 426 # invoked with -v only), the IRIX 6 native ld just overwrites the existing
 427 # file, even when creating an executable, so an execution test fails.
 428 # Remove possible default executable files to avoid this.
 429 #
 430 # FIXME: This really belongs into AC_PROG_CC and can be removed once
 431 # Autoconf includes it.
 432 rm -f a.out a.exe b.out
 433
 434 # Find the native compiler
 435 AC_PROG_CC
 436 AC_PROG_CXX
 437 ACX_PROG_GNAT([-I"$srcdir"/ada/libgnat])
 438 ACX_PROG_GDC([-I"$srcdir"/d])
 439
 440 # Do configure tests with the C++ compiler, since that's what we build with.
 441 AC_LANG(C++)
 442
 443 # Remove the -O2: for historical reasons, unless bootstrapping we prefer
 444 # optimizations to be activated explicitly by the toplevel.
 445 case "$CC" in
 446   */prev-gcc/xgcc*) ;;
 447   *) CFLAGS=`echo "$CFLAGS " | sed -e "s/-Ofast[[       ]]//" -e "s/-O[[gs]][[  ]]//" -e "s/-O[[0-9]]*[[        ]]//" `
 448      CXXFLAGS=`echo "$CXXFLAGS " | sed -e "s/-Ofast[[   ]]//" -e "s/-O[[gs]][[  ]]//" -e "s/-O[[0-9]]*[[        ]]//" ` ;;
 449 esac
 450 AC_SUBST(CFLAGS)
 451 AC_SUBST(CXXFLAGS)
 452 AC_SUBST(GDCFLAGS)
 453
 454 # Determine PICFLAG for target gnatlib.
 455 GCC_PICFLAG_FOR_TARGET
 456 AC_SUBST(PICFLAG_FOR_TARGET)
 457
 458 # -------------------------
 459 # Check C compiler features
 460 # -------------------------
 461
 462 AC_USE_SYSTEM_EXTENSIONS
 463
 464 AC_PROG_CPP
 465 AC_C_INLINE
 466
 467 AC_SYS_LARGEFILE
 468 AC_CHECK_SIZEOF(ino_t)
 469 AC_CHECK_SIZEOF(dev_t)
 470
 471 # Select the right stat being able to handle 64bit inodes, if needed.
 472 if test "$enable_largefile" != no; then
 473   case "$host, $build" in
 474     *-*-aix*,*|*,*-*-aix*)
 475       if test "$ac_cv_sizeof_ino_t" == "4" -a "$ac_cv_sizeof_dev_t" == 4; then
 476         AC_DEFINE(HOST_STAT_FOR_64BIT_INODES, stat64x,
 477           [Define which stat syscall is able to handle 64bit indodes.])
 478       fi;;
 479   esac
 480 fi
 481
 482
 483 # sizeof(char) is 1 by definition.
 484 AC_CHECK_SIZEOF(void *)
 485 AC_CHECK_SIZEOF(short)
 486 AC_CHECK_SIZEOF(int)
 487 AC_CHECK_SIZEOF(long)
 488 AC_CHECK_TYPES([long long], [AC_CHECK_SIZEOF(long long)])
 489 GCC_STDINT_TYPES
 490 if test x"$ac_cv_c_uint64_t" = x"no" -o x"$ac_cv_c_int64_t" = x"no"; then
 491   AC_MSG_ERROR([uint64_t or int64_t not found])
 492 fi
 493
 494 # check what underlying integer type int64_t uses
 495 AC_CACHE_CHECK(for int64_t underlying type, ac_cv_int64_t_type, [
 496 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 497 #ifdef HAVE_STDINT_H
 498 #include <stdint.h>
 499 #endif
 500 template <typename T> struct X { };
 501 template <>
 502 struct X<long> { typedef long t; };
 503 ]], [[X<int64_t>::t x;]])],[ac_cv_int64_t_type=long],[ac_cv_int64_t_type="long long"])])
 504 if test "$ac_cv_int64_t_type" = "long"; then
 505   AC_DEFINE(INT64_T_IS_LONG, 1,
 506   [Define if int64_t uses long as underlying type.])
 507 else
 508 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 509 #ifdef HAVE_STDINT_H
 510 #include <stdint.h>
 511 #endif
 512 template <typename T> struct X { };
 513 template <>
 514 struct X<long long> { typedef long long t; };
 515 ]], [[X<int64_t>::t x;]])],[],[AC_MSG_ERROR([error verifying int64_t uses long long])])
 516 fi
 517
 518 AC_CACHE_CHECK(for std::swap in <utility>, ac_cv_std_swap_in_utility, [
 519 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 520 #include <utility>
 521 ]], [[int a, b; std::swap(a,b);]])],[ac_cv_std_swap_in_utility=yes],[ac_cv_std_swap_in_utility=no])])
 522 if test $ac_cv_std_swap_in_utility = yes; then
 523   AC_DEFINE(HAVE_SWAP_IN_UTILITY, 1,
 524   [Define if <utility> defines std::swap.])
 525 fi
 526
 527 # Check whether compiler is affected by placement new aliasing bug (PR 29286).
 528 # If the host compiler is affected by the bug, and we build with optimization
 529 # enabled (which happens e.g. when cross-compiling), the pool allocator may
 530 # get miscompiled.  Use -fno-strict-aliasing to work around this problem.
 531 # Since there is no reliable feature check for the presence of this bug,
 532 # we simply use a GCC version number check.  (This should never trigger for
 533 # stages 2 or 3 of a native bootstrap.)
 534 aliasing_flags=
 535 if test "$GCC" = yes; then
 536   saved_CXXFLAGS="$CXXFLAGS"
 537
 538   # The following test compilation will succeed if and only if $CXX accepts
 539   # -fno-strict-aliasing *and* is older than GCC 4.3.
 540   CXXFLAGS="$CXXFLAGS -fno-strict-aliasing"
 541   AC_MSG_CHECKING([whether $CXX is affected by placement new aliasing bug])
 542   AC_COMPILE_IFELSE([AC_LANG_SOURCE([
 543 #if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
 544 #error compiler not affected by placement new aliasing bug
 545 #endif
 546 ])],
 547     [AC_MSG_RESULT([yes]); aliasing_flags='-fno-strict-aliasing'],
 548     [AC_MSG_RESULT([no])])
 549
 550   CXXFLAGS="$saved_CXXFLAGS"
 551 fi
 552 AC_SUBST(aliasing_flags)
 553
 554
 555
 556 # ---------------------
 557 # Warnings and checking
 558 # ---------------------
 559
 560 # Check $CC warning features (if it's GCC).
 561 # We want to use -pedantic, but we don't want warnings about
 562 # * 'long long'
 563 # * variadic macros
 564 # * overlong strings
 565 # * C++11 narrowing conversions in { }
 566 # So, we only use -pedantic if we can disable those warnings.
 567
 568 # In stage 1, disable -Wformat warnings from old GCCs about new % codes
 569 AC_ARG_ENABLE(build-format-warnings,
 570   AS_HELP_STRING([--disable-build-format-warnings],[don't use -Wformat while building GCC]),
 571   [],[enable_build_format_warnings=yes])
 572 AS_IF([test $enable_build_format_warnings = no],
 573       [wf_opt=-Wno-format],[wf_opt=])
 574 ACX_PROG_CXX_WARNING_OPTS(
 575         m4_quote(m4_do([-W -Wall -Wno-narrowing -Wwrite-strings ],
 576                        [-Wcast-qual $wf_opt])),
 577                        [loose_warn])
 578 ACX_PROG_CC_WARNING_OPTS(
 579         m4_quote(m4_do([-Wstrict-prototypes -Wmissing-prototypes ],
 580                        [])), [c_loose_warn])
 581 ACX_PROG_CXX_WARNING_OPTS(
 582         m4_quote(m4_do([-Wmissing-format-attribute ],
 583                        [-Woverloaded-virtual])), [strict_warn])
 584 ACX_PROG_CC_WARNING_OPTS(
 585         m4_quote(m4_do([-Wold-style-definition -Wc++-compat])), [c_strict_warn])
 586 ACX_PROG_CXX_WARNING_ALMOST_PEDANTIC(
 587         m4_quote(m4_do([-Wno-long-long -Wno-variadic-macros ],
 588                        [-Wno-overlength-strings])), [strict_warn])
 589 ACX_PROG_CXX_WARNINGS_ARE_ERRORS([manual], [strict_warn])
 590
 591 # The above macros do nothing if the compiler is not GCC.  However, the
 592 # Makefile has more goo to add other flags, so these variables are used
 593 # to enable warnings only for GCC.
 594 warn_cflags=
 595 warn_cxxflags=
 596 if test "x$GCC" = "xyes"; then
 597   warn_cflags='$(GCC_WARN_CFLAGS)'
 598   warn_cxxflags='$(GCC_WARN_CXXFLAGS)'
 599 fi
 600 AC_SUBST(warn_cflags)
 601 AC_SUBST(warn_cxxflags)
 602
 603 # Disable exceptions and RTTI if building with g++
 604 ACX_PROG_CC_WARNING_OPTS(
 605         m4_quote(m4_do([-fno-exceptions -fno-rtti -fasynchronous-unwind-tables])),
 606                        [noexception_flags])
 607
 608 # Enable expensive internal checks
 609 is_release=
 610 if test x"`cat $srcdir/DEV-PHASE`" != xexperimental; then
 611   is_release=yes
 612 fi
 613
 614 AC_ARG_ENABLE(checking,
 615 [AS_HELP_STRING([[--enable-checking[=LIST]]],
 616                 [enable expensive run-time checks.  With LIST,
 617                  enable only specific categories of checks.
 618                  Categories are: yes,no,all,none,release.
 619                  Flags are: assert,df,extra,fold,gc,gcac,gimple,misc,
 620                  rtlflag,rtl,runtime,tree,valgrind,types])],
 621 [ac_checking_flags="${enableval}"],[
 622 # Determine the default checks.
 623 if test x$is_release = x ; then
 624   ac_checking_flags=yes,extra
 625 else
 626   ac_checking_flags=release
 627 fi])
 628 IFS="${IFS=     }"; ac_save_IFS="$IFS"; IFS="$IFS,"
 629 for check in release $ac_checking_flags
 630 do
 631         case $check in
 632         # these set all the flags to specific states
 633         yes)            ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking= ;
 634                         ac_fold_checking= ; ac_gc_checking=1 ; ac_extra_checking= ;
 635                         ac_gc_always_collect= ; ac_gimple_checking=1 ; ac_rtl_checking= ;
 636                         ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
 637                         ac_tree_checking=1 ; ac_valgrind_checking= ;
 638                         ac_types_checking=1 ;;
 639         no|none)        ac_assert_checking= ; ac_checking= ; ac_df_checking= ;
 640                         ac_fold_checking= ; ac_gc_checking= ; ac_extra_checking= ;
 641                         ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
 642                         ac_rtlflag_checking= ; ac_runtime_checking= ;
 643                         ac_tree_checking= ; ac_valgrind_checking= ;
 644                         ac_types_checking= ;;
 645         all)            ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking=1 ;
 646                         ac_fold_checking=1 ; ac_gc_checking=1 ; ac_extra_checking=1 ;
 647                         ac_gc_always_collect=1 ; ac_gimple_checking=1 ; ac_rtl_checking=1 ;
 648                         ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
 649                         ac_tree_checking=1 ; ac_valgrind_checking= ;
 650                         ac_types_checking=1 ;;
 651         release)        ac_assert_checking=1 ; ac_checking= ; ac_df_checking= ;
 652                         ac_fold_checking= ; ac_gc_checking= ; ac_extra_checking= ;
 653                         ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
 654                         ac_rtlflag_checking= ; ac_runtime_checking=1 ;
 655                         ac_tree_checking= ; ac_valgrind_checking= ;
 656                         ac_types_checking= ;;
 657         # these enable particular checks
 658         assert)         ac_assert_checking=1 ;;
 659         df)             ac_df_checking=1 ;;
 660         extra)          ac_extra_checking=1 ;;
 661         fold)           ac_fold_checking=1 ;;
 662         gc)             ac_gc_checking=1 ;;
 663         gcac)           ac_gc_always_collect=1 ;;
 664         gimple)         ac_gimple_checking=1 ;;
 665         misc)           ac_checking=1 ;;
 666         rtl)            ac_rtl_checking=1 ;;
 667         rtlflag)        ac_rtlflag_checking=1 ;;
 668         runtime)        ac_runtime_checking=1 ;;
 669         tree)           ac_tree_checking=1 ;;
 670         types)          ac_types_checking=1 ;;
 671         valgrind)       ac_valgrind_checking=1 ;;
 672         *)      AC_MSG_ERROR(unknown check category $check) ;;
 673         esac
 674 done
 675 IFS="$ac_save_IFS"
 676
 677 nocommon_flag=""
 678 if test x$ac_checking != x ; then
 679   AC_DEFINE(CHECKING_P, 1,
 680 [Define to 0/1 if you want more run-time sanity checks.  This one gets a grab
 681 bag of miscellaneous but relatively cheap checks.])
 682   nocommon_flag=-fno-common
 683 else
 684   AC_DEFINE(CHECKING_P, 0)
 685 fi
 686 AC_SUBST(nocommon_flag)
 687 if test x$ac_extra_checking != x ; then
 688   AC_DEFINE(ENABLE_EXTRA_CHECKING, 1,
 689 [Define to 0/1 if you want extra run-time checking that might affect code
 690 generation.])
 691 else
 692   AC_DEFINE(ENABLE_EXTRA_CHECKING, 0)
 693 fi
 694 if test x$ac_df_checking != x ; then
 695   AC_DEFINE(ENABLE_DF_CHECKING, 1,
 696 [Define if you want more run-time sanity checks for dataflow.])
 697 fi
 698 if test x$ac_assert_checking != x ; then
 699   AC_DEFINE(ENABLE_ASSERT_CHECKING, 1,
 700 [Define if you want assertions enabled.  This is a cheap check.])
 701 fi
 702 if test x$ac_gimple_checking != x ; then
 703   AC_DEFINE(ENABLE_GIMPLE_CHECKING, 1,
 704 [Define if you want operations on GIMPLE (the basic data structure of
 705 the high-level optimizers) to be checked for dynamic type safety at
 706 runtime.  This is moderately expensive.])
 707 fi
 708 GCC_TARGET_TEMPLATE(ENABLE_RUNTIME_CHECKING)
 709 if test x$ac_runtime_checking != x ; then
 710   AC_DEFINE(ENABLE_RUNTIME_CHECKING, 1,
 711 [Define if you want runtime assertions enabled.  This is a cheap check.])
 712 fi
 713 if test x$ac_tree_checking != x ; then
 714   AC_DEFINE(ENABLE_TREE_CHECKING, 1,
 715 [Define if you want all operations on trees (the basic data
 716    structure of the front ends) to be checked for dynamic type safety
 717    at runtime.  This is moderately expensive.
 718    ])
 719   TREECHECKING=yes
 720 fi
 721 if test x$ac_types_checking != x ; then
 722   AC_DEFINE(ENABLE_TYPES_CHECKING, 1,
 723 [Define if you want all gimple types to be verified after gimplifiation.
 724    This is cheap.
 725    ])
 726 fi
 727 AC_SUBST(TREECHECKING)
 728 if test x$ac_rtl_checking != x ; then
 729   AC_DEFINE(ENABLE_RTL_CHECKING, 1,
 730 [Define if you want all operations on RTL (the basic data structure
 731    of the optimizer and back end) to be checked for dynamic type safety
 732    at runtime.  This is quite expensive.])
 733 fi
 734 if test x$ac_rtlflag_checking != x ; then
 735   AC_DEFINE(ENABLE_RTL_FLAG_CHECKING, 1,
 736 [Define if you want RTL flag accesses to be checked against the RTL
 737    codes that are supported for each access macro.  This is relatively
 738    cheap.])
 739 fi
 740 if test x$ac_gc_checking != x ; then
 741   AC_DEFINE(ENABLE_GC_CHECKING, 1,
 742 [Define if you want the garbage collector to do object poisoning and
 743    other memory allocation checks.  This is quite expensive.])
 744 fi
 745 if test x$ac_gc_always_collect != x ; then
 746   AC_DEFINE(ENABLE_GC_ALWAYS_COLLECT, 1,
 747 [Define if you want the garbage collector to operate in maximally
 748    paranoid mode, validating the entire heap and collecting garbage at
 749    every opportunity.  This is extremely expensive.])
 750 fi
 751 if test x$ac_fold_checking != x ; then
 752   AC_DEFINE(ENABLE_FOLD_CHECKING, 1,
 753 [Define if you want fold checked that it never destructs its argument.
 754    This is quite expensive.])
 755 fi
 756 valgrind_path_defines=
 757 valgrind_command=
 758
 759 dnl # This check AC_REQUIREs various stuff, so it *must not* be inside
 760 dnl # an if statement.  This was the source of very frustrating bugs
 761 dnl # in converting to autoconf 2.5x!
 762 AC_CHECK_HEADER(valgrind.h, have_valgrind_h=yes, have_valgrind_h=no)
 763
 764 # It is certainly possible that there's valgrind but no valgrind.h.
 765 # GCC relies on making annotations so we must have both.
 766 AC_MSG_CHECKING(for VALGRIND_DISCARD in <valgrind/memcheck.h>)
 767 AC_PREPROC_IFELSE([AC_LANG_SOURCE(
 768   [[#include <valgrind/memcheck.h>
 769 #ifndef VALGRIND_DISCARD
 770 #error VALGRIND_DISCARD not defined
 771 #endif]])],
 772   [gcc_cv_header_valgrind_memcheck_h=yes],
 773   [gcc_cv_header_valgrind_memcheck_h=no])
 774 AC_MSG_RESULT($gcc_cv_header_valgrind_memcheck_h)
 775 AC_MSG_CHECKING(for VALGRIND_DISCARD in <memcheck.h>)
 776 AC_PREPROC_IFELSE([AC_LANG_SOURCE(
 777   [[#include <memcheck.h>
 778 #ifndef VALGRIND_DISCARD
 779 #error VALGRIND_DISCARD not defined
 780 #endif]])],
 781   [gcc_cv_header_memcheck_h=yes],
 782   [gcc_cv_header_memcheck_h=no])
 783 AC_MSG_RESULT($gcc_cv_header_memcheck_h)
 784 if test $gcc_cv_header_valgrind_memcheck_h = yes; then
 785   AC_DEFINE(HAVE_VALGRIND_MEMCHECK_H, 1,
 786         [Define if valgrind's valgrind/memcheck.h header is installed.])
 787 fi
 788 if test $gcc_cv_header_memcheck_h = yes; then
 789   AC_DEFINE(HAVE_MEMCHECK_H, 1,
 790         [Define if valgrind's memcheck.h header is installed.])
 791 fi
 792
 793 if test x$ac_valgrind_checking != x ; then
 794   AM_PATH_PROG_WITH_TEST(valgrind_path, valgrind,
 795         [$ac_dir/$ac_word --version | grep valgrind- >/dev/null 2>&1])
 796   if test "x$valgrind_path" = "x" \
 797     || (test $have_valgrind_h = no \
 798         && test $gcc_cv_header_memcheck_h = no \
 799         && test $gcc_cv_header_valgrind_memcheck_h = no); then
 800         AC_MSG_ERROR([*** Can't find both valgrind and valgrind/memcheck.h, memcheck.h or valgrind.h])
 801   fi
 802   valgrind_path_defines=-DVALGRIND_PATH='\"'$valgrind_path'\"'
 803   valgrind_command="$valgrind_path -q"
 804   AC_DEFINE(ENABLE_VALGRIND_CHECKING, 1,
 805 [Define if you want to run subprograms and generated programs
 806    through valgrind (a memory checker).  This is extremely expensive.])
 807 fi
 808 AC_SUBST(valgrind_path_defines)
 809 AC_SUBST(valgrind_command)
 810
 811 # Enable code coverage collection
 812 AC_ARG_ENABLE(coverage,
 813 [AS_HELP_STRING([[--enable-coverage[=LEVEL]]],
 814                 [enable compiler's code coverage collection.
 815                  Use to measure compiler performance and locate
 816                  unused parts of the compiler. With LEVEL, specify
 817                  optimization. Values are opt, noopt,
 818                  default is noopt])],
 819 [case "${enableval}" in
 820   yes|noopt)
 821     coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O0 -fkeep-static-functions"
 822     ;;
 823   opt)
 824     coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O2 -fkeep-static-functions"
 825     ;;
 826   no)
 827     # a.k.a. --disable-coverage
 828     coverage_flags=""
 829     ;;
 830   *)
 831     AC_MSG_ERROR(unknown coverage setting $enableval)
 832     ;;
 833 esac],
 834 [coverage_flags=""])
 835 AC_SUBST(coverage_flags)
 836
 837 AC_ARG_ENABLE(gather-detailed-mem-stats,
 838 [AS_HELP_STRING([--enable-gather-detailed-mem-stats],
 839                 [enable detailed memory allocation stats gathering])], [],
 840 [enable_gather_detailed_mem_stats=no])
 841 gather_stats=`if test $enable_gather_detailed_mem_stats != no; then echo 1; else echo 0; fi`
 842 AC_DEFINE_UNQUOTED(GATHER_STATISTICS, $gather_stats,
 843 [Define to enable detailed memory allocation stats gathering.])
 844
 845 AC_ARG_ENABLE(valgrind-annotations,
 846 [AS_HELP_STRING([--enable-valgrind-annotations],
 847                 [enable valgrind runtime interaction])], [],
 848 [enable_valgrind_annotations=no])
 849 if test x$enable_valgrind_annotations != xno \
 850     || test x$ac_valgrind_checking != x; then
 851   if (test $have_valgrind_h = no \
 852       && test $gcc_cv_header_memcheck_h = no \
 853       && test $gcc_cv_header_valgrind_memcheck_h = no); then
 854     AC_MSG_ERROR([*** Can't find valgrind/memcheck.h, memcheck.h or valgrind.h])
 855   fi
 856   AC_DEFINE(ENABLE_VALGRIND_ANNOTATIONS, 1,
 857 [Define to get calls to the valgrind runtime enabled.])
 858 fi
 859
 860 # -------------------------------
 861 # Miscenalleous configure options
 862 # -------------------------------
 863
 864 # Determine whether or not multilibs are enabled.
 865 AC_ARG_ENABLE(multilib,
 866 [AS_HELP_STRING([--enable-multilib],
 867                 [enable library support for multiple ABIs])],
 868 [], [enable_multilib=yes])
 869 AC_SUBST(enable_multilib)
 870
 871 # Determine whether or not multiarch is enabled.
 872 AC_ARG_ENABLE(multiarch,
 873 [AS_HELP_STRING([--enable-multiarch],
 874                 [enable support for multiarch paths])],
 875 [case "${enableval}" in
 876 yes|no|auto) enable_multiarch=$enableval;;
 877 *) AC_MSG_ERROR(bad value ${enableval} given for --enable-multiarch option) ;;
 878 esac], [enable_multiarch=auto])
 879 if test x${enable_multiarch} = xauto; then
 880   if test x${with_native_system_header_dir} != x; then
 881     ma_msg_suffix=", disabled auto check (configured with --native-system-header-dir)"
 882     enable_multiarch=no
 883   fi
 884   if test x$host != x$target && test "x$with_sysroot" = x; then
 885     ma_msg_suffix=", disabled auto check (cross build configured without --with-sysroot)"
 886     enable_multiarch=no
 887   fi
 888 fi
 889 AC_MSG_CHECKING(for multiarch configuration)
 890 AC_SUBST(enable_multiarch)
 891 AC_MSG_RESULT($enable_multiarch$ma_msg_suffix)
 892
 893 # needed for setting the multiarch name for soft-float/hard-float ABIs
 894 AC_SUBST(with_cpu)
 895 AC_SUBST(with_float)
 896
 897 # default stack clash protection guard size as power of twos in bytes.
 898 # Please keep these in sync with params.def.
 899 stk_clash_min=12
 900 stk_clash_max=30
 901
 902 # Keep the default value when the option is not used to 0, this allows us to
 903 # distinguish between the cases where the user specifially set a value via
 904 # configure and when the normal default value is used.
 905 AC_ARG_WITH(stack-clash-protection-guard-size,
 906 [AS_HELP_STRING([--with-stack-clash-protection-guard-size=size],
 907 [Set the default stack clash protection guard size for specific targets as a power of two in bytes.])],
 908 [DEFAULT_STK_CLASH_GUARD_SIZE="$with_stack_clash_protection_guard_size"], [DEFAULT_STK_CLASH_GUARD_SIZE=0])
 909 if test $DEFAULT_STK_CLASH_GUARD_SIZE -ne 0 \
 910      && (test $DEFAULT_STK_CLASH_GUARD_SIZE -lt $stk_clash_min \
 911          || test $DEFAULT_STK_CLASH_GUARD_SIZE -gt $stk_clash_max); then
 912   AC_MSG_ERROR(m4_normalize([
 913                 Invalid value $DEFAULT_STK_CLASH_GUARD_SIZE for --with-stack-clash-protection-guard-size. \
 914                 Must be between $stk_clash_min and $stk_clash_max.]))
 915 fi
 916
 917 AC_DEFINE_UNQUOTED(DEFAULT_STK_CLASH_GUARD_SIZE, $DEFAULT_STK_CLASH_GUARD_SIZE,
 918         [Define to larger than zero set the default stack clash protector size.])
 919
 920 # Enable __cxa_atexit for C++.
 921 AC_ARG_ENABLE(__cxa_atexit,
 922 [AS_HELP_STRING([--enable-__cxa_atexit], [enable __cxa_atexit for C++])],
 923 [], [])
 924
 925 # Enable C extension for decimal float if target supports it.
 926 GCC_AC_ENABLE_DECIMAL_FLOAT([$target])
 927
 928 dfp=`if test $enable_decimal_float != no; then echo 1; else echo 0; fi`
 929 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_FLOAT, $dfp,
 930 [Define to 1 to enable decimal float extension to C.])
 931
 932 # Use default_decimal_float for dependency.
 933 enable_decimal_float=$default_decimal_float
 934
 935 bid=`if test $enable_decimal_float = bid; then echo 1; else echo 0; fi`
 936 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_BID_FORMAT, $bid,
 937 [Define to 1 to specify that we are using the BID decimal floating
 938 point format instead of DPD])
 939
 940 # Enable C extension for fixed-point arithmetic.
 941 AC_ARG_ENABLE(fixed-point,
 942 [AS_HELP_STRING([--enable-fixed-point],
 943                 [enable fixed-point arithmetic extension to C])],
 944 [],
 945 [
 946   case $target in
 947     arm*)
 948       enable_fixed_point=yes
 949       ;;
 950
 951     mips*-*-*)
 952       enable_fixed_point=yes
 953       ;;
 954     loongarch*-*-*)
 955       enable_fixed_point=yes
 956       ;;
 957     *)
 958       AC_MSG_WARN([fixed-point is not supported for this target, ignored])
 959       enable_fixed_point=no
 960       ;;
 961   esac
 962 ])
 963 AC_SUBST(enable_fixed_point)
 964
 965 fixedpoint=`if test $enable_fixed_point = yes; then echo 1; else echo 0; fi`
 966 AC_DEFINE_UNQUOTED(ENABLE_FIXED_POINT, $fixedpoint,
 967 [Define to 1 to enable fixed-point arithmetic extension to C.])
 968
 969 # Enable threads
 970 # Pass with no value to take the default
 971 # Pass with a value to specify a thread package
 972 AC_ARG_ENABLE(threads,
 973 [AS_HELP_STRING([[--enable-threads[=LIB]]],
 974                 [enable thread usage for target GCC,
 975                  using LIB thread package])],,
 976 [enable_threads=''])
 977
 978 AC_ARG_ENABLE(tls,
 979 [AS_HELP_STRING([--enable-tls],
 980                 [enable or disable generation of tls code
 981                  overriding the assembler check for tls support])],
 982 [
 983   case $enable_tls in
 984     yes | no) ;;
 985     *) AC_MSG_ERROR(['$enable_tls' is an invalid value for --enable-tls.
 986 Valid choices are 'yes' and 'no'.]) ;;
 987   esac
 988 ], [enable_tls=''])
 989
 990 AC_ARG_ENABLE(vtable-verify,
 991 [AS_HELP_STRING([--enable-vtable-verify],
 992                 [enable vtable verification feature])],,
 993 [enable_vtable_verify=no])
 994 vtable_verify=`if test x$enable_vtable_verify = xyes; then echo 1; else echo 0; fi`
 995 AC_DEFINE_UNQUOTED(ENABLE_VTABLE_VERIFY, $vtable_verify,
 996 [Define 0/1 if vtable verification feature is enabled.])
 997
 998 AC_ARG_ENABLE(analyzer,
 999 [AS_HELP_STRING([--disable-analyzer],
1000                 [disable -fanalyzer static analyzer])],
1001 if test x$enable_analyzer = xno; then
1002         analyzer=0
1003 else
1004         analyzer=1
1005 fi,
1006 analyzer=1)
1007 AC_DEFINE_UNQUOTED(ENABLE_ANALYZER, $analyzer,
1008 [Define 0/1 if static analyzer feature is enabled.])
1009
1010 AC_ARG_ENABLE(objc-gc,
1011 [AS_HELP_STRING([--enable-objc-gc],
1012                 [enable the use of Boehm's garbage collector with
1013                  the GNU Objective-C runtime])],
1014 if test x$enable_objc_gc = xno; then
1015         objc_boehm_gc=''
1016 else
1017         objc_boehm_gc=1
1018 fi,
1019 objc_boehm_gc='')
1020
1021 AC_ARG_WITH(dwarf2,
1022 [AS_HELP_STRING([--with-dwarf2], [force the default debug format to be DWARF 2])],
1023 dwarf2="$with_dwarf2",
1024 dwarf2=no)
1025
1026 AC_ARG_ENABLE(shared,
1027 [AS_HELP_STRING([--disable-shared], [don't provide a shared libgcc])],
1028 [
1029   case $enable_shared in
1030   yes | no) ;;
1031   *)
1032     enable_shared=no
1033     IFS="${IFS=         }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
1034     for pkg in $enableval; do
1035       if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
1036         enable_shared=yes
1037       fi
1038     done
1039     IFS="$ac_save_ifs"
1040     ;;
1041   esac
1042 ], [enable_shared=yes])
1043 AC_SUBST(enable_shared)
1044
1045 AC_ARG_ENABLE(gcov,
1046 [  --disable-gcov          don't provide libgcov and related host tools],
1047 [], [case $target in
1048        bpf-*-*)
1049          enable_gcov=no
1050        ;;
1051        *)
1052          enable_gcov=yes
1053        ;;
1054      esac])
1055
1056 AC_SUBST(enable_gcov)
1057
1058 AC_ARG_WITH(specs,
1059   [AS_HELP_STRING([--with-specs=SPECS],
1060                   [add SPECS to driver command-line processing])],
1061   [CONFIGURE_SPECS=$withval],
1062   [CONFIGURE_SPECS=]
1063 )
1064 AC_SUBST(CONFIGURE_SPECS)
1065
1066 ACX_PKGVERSION([GCC])
1067 ACX_BUGURL([https://gcc.gnu.org/bugs/])
1068
1069 # Allow overriding the default URL for documentation
1070 AC_ARG_WITH(documentation-root-url,
1071     AS_HELP_STRING([--with-documentation-root-url=URL],
1072                    [Root for documentation URLs]),
1073     [case "$withval" in
1074       yes) AC_MSG_ERROR([documentation root URL not specified]) ;;
1075       no)  AC_MSG_ERROR([documentation root URL not specified]) ;;
1076       */)  DOCUMENTATION_ROOT_URL="$withval" ;;
1077       *)   AC_MSG_ERROR([documentation root URL does not end with /]) ;;
1078      esac],
1079      DOCUMENTATION_ROOT_URL="https://gcc.gnu.org/onlinedocs/"
1080 )
1081 AC_DEFINE_UNQUOTED(DOCUMENTATION_ROOT_URL,"$DOCUMENTATION_ROOT_URL",
1082         [Define to the root for documentation URLs.])
1083
1084 # Allow overriding the default URL for GCC changes
1085 AC_ARG_WITH(changes-root-url,
1086     AS_HELP_STRING([--with-changes-root-url=URL],
1087                    [Root for GCC changes URLs]),
1088     [case "$withval" in
1089       yes) AC_MSG_ERROR([changes root URL not specified]) ;;
1090       no)  AC_MSG_ERROR([changes root URL not specified]) ;;
1091       */)  CHANGES_ROOT_URL="$withval" ;;
1092       *)   AC_MSG_ERROR([changes root URL does not end with /]) ;;
1093      esac],
1094      CHANGES_ROOT_URL="https://gcc.gnu.org/"
1095 )
1096 AC_DEFINE_UNQUOTED(CHANGES_ROOT_URL,"$CHANGES_ROOT_URL",
1097         [Define to the root for URLs about GCC changes.])
1098
1099 # Sanity check enable_languages in case someone does not run the toplevel
1100 # configure # script.
1101 AC_ARG_ENABLE(languages,
1102 [AS_HELP_STRING([--enable-languages=LIST], [specify which front-ends to build])],
1103 [case ,${enable_languages}, in
1104        ,,|,yes,)
1105                 # go safe -- we cannot be much sure without the toplevel
1106                 # configure's
1107                 # analysis of which target libs are present and usable
1108                 enable_languages=c
1109                 ;;
1110          *,all,*)
1111                 AC_MSG_ERROR([only the toplevel supports --enable-languages=all])
1112                 ;;
1113         *,c,*)
1114                 ;;
1115         *)
1116                 enable_languages=c,${enable_languages}
1117                 ;;
1118 esac],
1119 [enable_languages=c])
1120
1121 # If top-level libada has been disabled, then wire in install-gnatlib
1122 # invocation with `make install', so that one can build and install
1123 # the library manually with `make -C gcc all gnatlib gnattools install'.
1124 if test x"$enable_libada" = xno; then
1125   gnat_install_lib=gnat-install-lib
1126 else
1127   gnat_install_lib=
1128 fi
1129 AC_SUBST(gnat_install_lib)
1130
1131 if test x"$enable_as_accelerator_for" != x; then
1132   AC_DEFINE(ACCEL_COMPILER, 1,
1133     [Define if this compiler should be built as the offload target compiler.])
1134   enable_as_accelerator=yes
1135   case "${target}" in
1136     *-intelmicemul-*)
1137       # In this case we expect offload compiler to be built as native, so we
1138       # need to rename the driver to avoid clashes with host's drivers.
1139       program_transform_name="s&^&${target}-&" ;;
1140   esac
1141   sedscript="s#${target_noncanonical}#${enable_as_accelerator_for}-accel-${target_noncanonical}#"
1142   program_transform_name=`echo $program_transform_name | sed $sedscript`
1143   accel_dir_suffix=/accel/${target_noncanonical}
1144   real_target_noncanonical=${enable_as_accelerator_for}
1145 fi
1146 AC_SUBST(enable_as_accelerator)
1147 AC_SUBST(real_target_noncanonical)
1148 AC_SUBST(accel_dir_suffix)
1149
1150 for tgt in `echo $enable_offload_targets | sed 's/,/ /g'`; do
1151   tgt=`echo $tgt | sed 's/=.*//'`
1152
1153   enable_offloading=1
1154   case "$tgt" in
1155     *-intelmic-* | *-intelmicemul-*)
1156         omp_device_property=omp-device-properties-i386
1157         omp_device_property_tmake_file="${omp_device_property_tmake_file} \$(srcdir)/config/i386/t-omp-device"
1158         ;;
1159     amdgcn*)
1160         omp_device_property=omp-device-properties-gcn
1161         omp_device_property_tmake_file="${omp_device_property_tmake_file} \$(srcdir)/config/gcn/t-omp-device"
1162         ;;
1163     nvptx*)
1164         omp_device_property=omp-device-properties-nvptx
1165         omp_device_property_tmake_file="${omp_device_property_tmake_file} \$(srcdir)/config/nvptx/t-omp-device"
1166         ;;
1167     *)
1168         AC_MSG_ERROR([unknown offload target specified])
1169         ;;
1170   esac
1171   omp_device_properties="${omp_device_properties} ${tgt}=${omp_device_property}"
1172   omp_device_property_deps="${omp_device_property_deps} ${omp_device_property}"
1173
1174   if test x"$offload_targets" = x; then
1175     offload_targets=$tgt
1176   else
1177     offload_targets="$offload_targets,$tgt"
1178   fi
1179 done
1180 AC_SUBST(omp_device_properties)
1181 AC_SUBST(omp_device_property_deps)
1182
1183 AC_DEFINE_UNQUOTED(OFFLOAD_TARGETS, "$offload_targets",
1184   [Define to offload targets, separated by commas.])
1185 if test x"$enable_offloading" != x; then
1186   AC_DEFINE(ENABLE_OFFLOADING, 1,
1187     [Define this to enable support for offloading.])
1188 else
1189   AC_DEFINE(ENABLE_OFFLOADING, 0,
1190     [Define this to enable support for offloading.])
1191 fi
1192
1193 if test "x$enable_offload_defaulted" = xyes; then
1194   AC_DEFINE(OFFLOAD_DEFAULTED, 1,
1195     [Define to 1 to if -foffload is defaulted])
1196 fi
1197
1198 AC_ARG_WITH(multilib-list,
1199 [AS_HELP_STRING([--with-multilib-list], [select multilibs (AArch64, ARM, AVR, OR1K, RISC-V, SH and x86-64 only)])],
1200 :,
1201 with_multilib_list=default)
1202
1203 AC_ARG_WITH(multilib-generator,
1204 [AS_HELP_STRING([--with-multilib-generator], [Multi-libs configuration string (RISC-V only)])],
1205 :,
1206 with_multilib_generator=default)
1207
1208 # -------------------------
1209 # Checks for other programs
1210 # -------------------------
1211
1212 AC_PROG_MAKE_SET
1213
1214 # Find some useful tools
1215 AC_PROG_AWK
1216 # We need awk to create options.cc and options.h.
1217 # Bail out if it's missing.
1218 case ${AWK} in
1219   "") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
1220 esac
1221
1222 gcc_AC_PROG_LN_S
1223 ACX_PROG_LN($LN_S)
1224 AC_PROG_RANLIB
1225 ranlib_flags=""
1226 AC_SUBST(ranlib_flags)
1227
1228 gcc_AC_PROG_INSTALL
1229
1230 # See if cmp has --ignore-initial.
1231 gcc_AC_PROG_CMP_IGNORE_INITIAL
1232
1233 # See if we have the mktemp command.
1234 AC_CHECK_PROG(have_mktemp_command, mktemp, yes, no)
1235
1236 # See if makeinfo has been installed and is modern enough
1237 # that we can use it.
1238 ACX_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
1239   [GNU texinfo.* \([0-9][0-9.]*\)],
1240   [4.[7-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
1241 if test $gcc_cv_prog_makeinfo_modern = no; then
1242   AC_MSG_WARN([
1243 *** Makeinfo is missing or too old.
1244 *** Info documentation will not be built.])
1245   BUILD_INFO=
1246 else
1247   BUILD_INFO=info
1248 fi
1249 AC_SUBST(BUILD_INFO)
1250
1251 # Is pod2man recent enough to regenerate manpages?
1252 AC_MSG_CHECKING([for recent Pod::Man])
1253 if (perl -e 'use 1.10 Pod::Man') >/dev/null 2>&1; then
1254   AC_MSG_RESULT(yes)
1255   GENERATED_MANPAGES=generated-manpages
1256 else
1257   AC_MSG_RESULT(no)
1258   GENERATED_MANPAGES=
1259 fi
1260 AC_SUBST(GENERATED_MANPAGES)
1261
1262 MISSING="${CONFIG_SHELL-/bin/sh} $ac_aux_dir/missing"
1263
1264 # How about lex?
1265 dnl Don't use AC_PROG_LEX; we insist on flex.
1266 dnl LEXLIB is not useful in gcc.
1267 AC_CHECK_PROGS([FLEX], flex, [$MISSING flex])
1268
1269 # Bison?
1270 AC_CHECK_PROGS([BISON], bison, [$MISSING bison])
1271
1272 # Binutils are not build modules, unlike bison/flex/makeinfo.  So we
1273 # check for build == host before using them.
1274
1275 # NM
1276 if test x${build} = x${host} && test -f $srcdir/../binutils/nm.c \
1277   && test -d ../binutils ; then
1278   NM='${objdir}/../binutils/nm-new'
1279 else
1280   AC_CHECK_PROG(NM, nm, nm, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing nm)
1281 fi
1282
1283 # AR
1284 if test x${build} = x${host} && test -f $srcdir/../binutils/ar.c \
1285   && test -d ../binutils ; then
1286   AR='${objdir}/../binutils/ar'
1287 else
1288   AC_CHECK_PROG(AR, ar, ar, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing ar)
1289 fi
1290
1291 # The jit documentation looks better if built with sphinx, but can be
1292 # built with texinfo if sphinx is not available.
1293 # Set "doc_build_sys" to "sphinx" or "texinfo" accordingly.
1294 AC_CHECK_PROG(doc_build_sys, sphinx-build, sphinx, texinfo)
1295
1296 # --------------------
1297 # Checks for C headers
1298 # --------------------
1299
1300 # Need to reject headers which give warnings, so that the -Werror bootstrap
1301 # works later. *sigh*  This needs to come before all header checks.
1302 AC_PROG_CPP_WERROR
1303
1304 AC_HEADER_STDC
1305 AC_HEADER_TIME
1306 ACX_HEADER_STRING
1307 AC_HEADER_SYS_WAIT
1308 AC_HEADER_TIOCGWINSZ
1309 AC_CHECK_HEADERS(limits.h stddef.h string.h strings.h stdlib.h time.h iconv.h \
1310                  fcntl.h ftw.h unistd.h sys/file.h sys/time.h sys/mman.h \
1311                  sys/resource.h sys/param.h sys/times.h sys/stat.h sys/locking.h \
1312                  direct.h malloc.h langinfo.h ldfcn.h locale.h wchar.h)
1313
1314 # Check for thread headers.
1315 AC_CHECK_HEADER(thread.h, [have_thread_h=yes], [have_thread_h=])
1316 AC_CHECK_HEADER(pthread.h, [have_pthread_h=yes], [have_pthread_h=])
1317
1318 # These tests can't be done till we know if we have limits.h.
1319 gcc_AC_C_CHAR_BIT
1320 AC_C_BIGENDIAN
1321
1322 # ----------------------
1323 # Checks for C++ headers
1324 # ----------------------
1325
1326 dnl Autoconf will give an error in the configure script if there is no
1327 dnl C++ preprocessor.  Hack to prevent that.
1328 m4_pushdef([AC_MSG_ERROR], m4_defn([AC_MSG_WARN]))[]dnl
1329 AC_PROG_CXXCPP
1330 m4_popdef([AC_MSG_ERROR])[]dnl
1331
1332 AC_CHECK_HEADERS(unordered_map)
1333 AC_CHECK_HEADERS(tr1/unordered_map)
1334 AC_CHECK_HEADERS(ext/hash_map)
1335
1336 # --------
1337 # Dependency checking.
1338 # --------
1339
1340 ZW_CREATE_DEPDIR
1341 AC_CONFIG_COMMANDS([gccdepdir],[
1342   ${CONFIG_SHELL-/bin/sh} $ac_aux_dir/mkinstalldirs build/$DEPDIR
1343   for lang in $subdirs c-family common analyzer rtl-ssa
1344   do
1345       ${CONFIG_SHELL-/bin/sh} $ac_aux_dir/mkinstalldirs $lang/$DEPDIR
1346   done], [subdirs="$subdirs" ac_aux_dir=$ac_aux_dir DEPDIR=$DEPDIR])
1347
1348 ZW_PROG_COMPILER_DEPENDENCIES([CXX])
1349
1350 # --------
1351 # UNSORTED
1352 # --------
1353
1354
1355 # These libraries may be used by collect2.
1356 # We may need a special search path to get them linked.
1357 AC_CACHE_CHECK(for collect2 libraries, gcc_cv_collect2_libs,
1358 [save_LIBS="$LIBS"
1359 for libs in '' -lld -lmld \
1360                 '-L/usr/lib/cmplrs/cc2.11 -lmld' \
1361                 '-L/usr/lib/cmplrs/cc3.11 -lmld'
1362 do
1363         LIBS="$libs"
1364         AC_TRY_LINK_FUNC(ldopen,
1365                 [gcc_cv_collect2_libs="$libs"; break])
1366 done
1367 LIBS="$save_LIBS"
1368 test -z "$gcc_cv_collect2_libs" && gcc_cv_collect2_libs='none required'])
1369 case $gcc_cv_collect2_libs in
1370         "none required")        ;;
1371         *)      COLLECT2_LIBS=$gcc_cv_collect2_libs ;;
1372 esac
1373 AC_SUBST(COLLECT2_LIBS)
1374
1375 # When building Ada code on Alpha, we need exc_resume which is usually in
1376 # -lexc.  So test for it.
1377 save_LIBS="$LIBS"
1378 LIBS=
1379 AC_SEARCH_LIBS(exc_resume, exc)
1380 GNAT_LIBEXC="$LIBS"
1381 LIBS="$save_LIBS"
1382 AC_SUBST(GNAT_LIBEXC)
1383
1384 # To support -mcpu=native on Solaris/SPARC, we need libkstat.
1385 save_LIBS="$LIBS"
1386 LIBS=
1387 AC_SEARCH_LIBS(kstat_open, kstat)
1388 EXTRA_GCC_LIBS="$LIBS"
1389 LIBS="$save_LIBS"
1390 AC_SUBST(EXTRA_GCC_LIBS)
1391
1392 # Solaris needs libsocket and libnsl for socket functions before 11.4.
1393 # C++ needs those for libcody.
1394 save_LIBS="$LIBS"
1395 LIBS=
1396 AX_LIB_SOCKET_NSL
1397 NETLIBS="$LIBS"
1398 LIBS="$save_LIBS"
1399 AC_SUBST(NETLIBS)
1400
1401 # Some systems put ldexp and frexp in libm instead of libc; assume
1402 # they're both in the same place.  jcf-dump needs them.
1403 save_LIBS="$LIBS"
1404 LIBS=
1405 AC_SEARCH_LIBS(ldexp, m)
1406 LDEXP_LIB="$LIBS"
1407 LIBS="$save_LIBS"
1408 AC_SUBST(LDEXP_LIB)
1409
1410 # Some systems need dlopen
1411 save_LIBS="$LIBS"
1412 LIBS=
1413 AC_SEARCH_LIBS(dlopen, dl)
1414 DL_LIB="$LIBS"
1415 LIBS="$save_LIBS"
1416 AC_SUBST(DL_LIB)
1417
1418 # Use <inttypes.h> only if it exists,
1419 # doesn't clash with <sys/types.h>, declares intmax_t and defines
1420 # PRId64
1421 AC_MSG_CHECKING(for inttypes.h)
1422 AC_CACHE_VAL(gcc_cv_header_inttypes_h,
1423 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
1424 [[#define __STDC_FORMAT_MACROS
1425 #include <sys/types.h>
1426 #include <inttypes.h>]],
1427   [[intmax_t i = -1;
1428 #ifndef PRId64
1429 choke me
1430 #endif]])],
1431   [gcc_cv_header_inttypes_h=yes],
1432   [gcc_cv_header_inttypes_h=no])])
1433 AC_MSG_RESULT($gcc_cv_header_inttypes_h)
1434 if test $gcc_cv_header_inttypes_h = yes; then
1435   AC_DEFINE(HAVE_INTTYPES_H, 1,
1436         [Define if you have a working <inttypes.h> header file.])
1437 fi
1438
1439 # Look for the ZSTD package.
1440 ZSTD_INCLUDE=
1441 ZSTD_LIB=
1442 AC_SUBST(ZSTD_INCLUDE)
1443 AC_SUBST(ZSTD_LIB)
1444 ZSTD_CPPFLAGS=
1445 ZSTD_LDFLAGS=
1446 AC_SUBST(ZSTD_CPPFLAGS)
1447 AC_SUBST(ZSTD_LDFLAGS)
1448 AC_ARG_WITH(zstd,
1449         [AS_HELP_STRING([--with-zstd=PATH],
1450                 [specify prefix directory for installed zstd library.
1451                  Equivalent to --with-zstd-include=PATH/include
1452                  plus --with-zstd-lib=PATH/lib])])
1453 AC_ARG_WITH(zstd-include,
1454         [AS_HELP_STRING([--with-zstd-include=PATH],
1455                 [specify directory for installed zstd include files])])
1456 AC_ARG_WITH(zstd-lib,
1457         [AS_HELP_STRING([--with-zstd-lib=PATH],
1458                 [specify directory for the installed zstd library])])
1459 case "x$with_zstd" in
1460   x) ;;
1461   xno)
1462     ZSTD_INCLUDE=
1463     ZSTD_LIB=
1464     ;;
1465   *) ZSTD_INCLUDE=$with_zstd/include
1466      ZSTD_LIB=$with_zstd/lib
1467      ;;
1468 esac
1469
1470 if test "x$with_zstd" != xno; then
1471 if test "x$with_zstd_include" != x; then
1472   ZSTD_INCLUDE=$with_zstd_include
1473 fi
1474 if test "x$with_zstd_lib" != x; then
1475   ZSTD_LIB=$with_zstd_lib
1476 fi
1477 if test "x$ZSTD_INCLUDE" != x \
1478    && test "x$ZSTD_INCLUDE" != xno; then
1479   ZSTD_CPPFLAGS=-I$ZSTD_INCLUDE
1480 fi
1481 if test "x$ZSTD_LIB" != x \
1482    && test "x$ZSTD_LIB" != xno; then
1483   ZSTD_LDFLAGS=-L$ZSTD_LIB
1484 fi
1485
1486 CXXFLAGS="$CXXFLAGS $ZSTD_CPPFLAGS"
1487 LDFLAGS="$LDFLAGS $ZSTD_LDFLAGS"
1488
1489 AC_MSG_CHECKING(for zstd.h)
1490 AC_CACHE_VAL(gcc_cv_header_zstd_h,
1491 # We require version 1.3.0 or later.  This is the first version that has
1492 # ZSTD_getFrameContentSize.
1493 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
1494 [[#include <zstd.h>
1495 #if ZSTD_VERSION_NUMBER < 10300
1496 #error "need zstd 1.3.0 or better"
1497 #endif]])],
1498   [gcc_cv_header_zstd_h=yes],
1499   [gcc_cv_header_zstd_h=no])])
1500 AC_MSG_RESULT($gcc_cv_header_zstd_h)
1501 if test $gcc_cv_header_zstd_h = yes; then
1502   AC_DEFINE(HAVE_ZSTD_H, 1,
1503         [Define if you have a working <zstd.h> header file.])
1504 elif test "x$with_zstd" != x; then
1505     as_fn_error $? "Unable to find zstd.h.  See config.log for details." "$LINENO" 5
1506 fi
1507
1508 # LTO can use zstd compression algorithm
1509 save_LIBS="$LIBS"
1510 LIBS=
1511 AC_SEARCH_LIBS(ZSTD_compress, zstd)
1512 ZSTD_LIB="$LIBS"
1513 LIBS="$save_LIBS"
1514 AC_SUBST(ZSTD_LIB)
1515 fi
1516
1517 dnl Disabled until we have a complete test for buggy enum bitfields.
1518 dnl gcc_AC_C_ENUM_BF_UNSIGNED
1519
1520 define(gcc_UNLOCKED_FUNCS, clearerr_unlocked feof_unlocked dnl
1521   ferror_unlocked fflush_unlocked fgetc_unlocked fgets_unlocked dnl
1522   fileno_unlocked fprintf_unlocked fputc_unlocked fputs_unlocked dnl
1523   fread_unlocked fwrite_unlocked getchar_unlocked getc_unlocked dnl
1524   putchar_unlocked putc_unlocked)
1525 AC_CHECK_FUNCS(times clock kill getrlimit setrlimit atoq \
1526         popen sysconf strsignal getrusage nl_langinfo \
1527         gettimeofday mbstowcs wcswidth mmap posix_fallocate setlocale \
1528         gcc_UNLOCKED_FUNCS madvise mallinfo mallinfo2 fstatat)
1529
1530 if test x$ac_cv_func_mbstowcs = xyes; then
1531   AC_CACHE_CHECK(whether mbstowcs works, gcc_cv_func_mbstowcs_works,
1532 [    AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <stdlib.h>
1533 int main()
1534 {
1535   mbstowcs(0, "", 0);
1536   return 0;
1537 }]])],
1538     [gcc_cv_func_mbstowcs_works=yes],
1539     [gcc_cv_func_mbstowcs_works=no],
1540     [gcc_cv_func_mbstowcs_works=yes])])
1541   if test x$gcc_cv_func_mbstowcs_works = xyes; then
1542     AC_DEFINE(HAVE_WORKING_MBSTOWCS, 1,
1543   [Define this macro if mbstowcs does not crash when its
1544    first argument is NULL.])
1545   fi
1546 fi
1547
1548 AC_CHECK_TYPE(ssize_t, int)
1549 AC_CHECK_TYPE(caddr_t, char *)
1550 AC_CHECK_TYPE(sighander_t,
1551   AC_DEFINE(HAVE_SIGHANDLER_T, 1,
1552     [Define if <sys/signal.h> defines sighandler_t]),
1553     ,signal.h)
1554
1555 GCC_AC_FUNC_MMAP_BLACKLIST
1556
1557 case "${host}" in
1558 *-*-*vms*)
1559   # Under VMS, vfork works very differently than on Unix. The standard test
1560   # won't work, and it isn't easily adaptable. It makes more sense to
1561   # just force it.
1562   ac_cv_func_vfork_works=yes
1563   ;;
1564 esac
1565 AC_FUNC_FORK
1566
1567 AM_ICONV
1568
1569 # Until we have in-tree GNU iconv:
1570 LIBICONV_DEP=
1571 if test -f "$LTLIBICONV"; then
1572   LIBICONV_DEP=$LTLIBICONV
1573 fi
1574 AC_SUBST(LIBICONV_DEP)
1575
1576 AM_LC_MESSAGES
1577
1578 AM_LANGINFO_CODESET
1579
1580 # We will need to find libiberty.h and ansidecl.h
1581 saved_CFLAGS="$CFLAGS"
1582 CFLAGS="$CFLAGS -I${srcdir} -I${srcdir}/../include $GMPINC"
1583 saved_CXXFLAGS="$CXXFLAGS"
1584 CXXFLAGS="$CXXFLAGS -I${srcdir} -I${srcdir}/../include $GMPINC"
1585
1586 # gcc_AC_CHECK_DECLS doesn't support overloaded functions, so use the
1587 # normal autoconf function for these.  But force definition of
1588 # HAVE_DECL_BASENAME like gcc_AC_CHECK_DECLS does, to suppress the bizarre
1589 # basename handling in libiberty.h.
1590 AC_CHECK_DECLS([basename(const char*), strstr(const char*,const char*)], , ,[
1591 #undef HAVE_DECL_BASENAME
1592 #define HAVE_DECL_BASENAME 1
1593 #include "ansidecl.h"
1594 #include "system.h"])
1595
1596 gcc_AC_CHECK_DECLS(getenv atol atoll asprintf sbrk abort atof getcwd getwd \
1597         madvise stpcpy strnlen strsignal strverscmp \
1598         strtol strtoul strtoll strtoull setenv unsetenv \
1599         errno snprintf vsnprintf vasprintf malloc realloc calloc \
1600         free getopt clock getpagesize ffs gcc_UNLOCKED_FUNCS, , ,[
1601 #include "ansidecl.h"
1602 #include "system.h"])
1603
1604 gcc_AC_CHECK_DECLS(getrlimit setrlimit getrusage, , ,[
1605 #include "ansidecl.h"
1606 #include "system.h"
1607 #ifdef HAVE_SYS_RESOURCE_H
1608 #include <sys/resource.h>
1609 #endif
1610 ])
1611
1612 gcc_AC_CHECK_DECLS(mallinfo mallinfo2, , ,[
1613 #include "ansidecl.h"
1614 #include "system.h"
1615 #ifdef HAVE_MALLOC_H
1616 #include <malloc.h>
1617 #endif
1618 ])
1619
1620 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1621 #include "ansidecl.h"
1622 #include "system.h"
1623 #ifdef HAVE_SYS_RESOURCE_H
1624 #include <sys/resource.h>
1625 #endif
1626 ]], [[rlim_t l = 0;]])],[],[AC_DEFINE([rlim_t],[long],
1627 [Define to `long' if <sys/resource.h> doesn't define.])])
1628
1629 # On AIX 5.2, <ldfcn.h> conflicts with <fcntl.h>, as both define incompatible
1630 # FREAD and FWRITE macros.  Fortunately, for GCC's single usage of ldgetname
1631 # in collect2.cc, <fcntl.h> isn't visible, but the configure test below needs
1632 # to undef these macros to get the correct value for HAVE_DECL_LDGETNAME.
1633 gcc_AC_CHECK_DECLS(ldgetname, , ,[
1634 #include "ansidecl.h"
1635 #include "system.h"
1636 #ifdef HAVE_LDFCN_H
1637 #undef FREAD
1638 #undef FWRITE
1639 #include <ldfcn.h>
1640 #endif
1641 ])
1642
1643 gcc_AC_CHECK_DECLS(times, , ,[
1644 #include "ansidecl.h"
1645 #include "system.h"
1646 #ifdef HAVE_SYS_TIMES_H
1647 #include <sys/times.h>
1648 #endif
1649 ])
1650
1651 gcc_AC_CHECK_DECLS(sigaltstack, , ,[
1652 #include "ansidecl.h"
1653 #include "system.h"
1654 #include <signal.h>
1655 ])
1656
1657 # More time-related stuff.
1658 AC_CACHE_CHECK(for struct tms, ac_cv_struct_tms, [
1659 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1660 #include "ansidecl.h"
1661 #include "system.h"
1662 #ifdef HAVE_SYS_TIMES_H
1663 #include <sys/times.h>
1664 #endif
1665 ]], [[struct tms tms;]])],[ac_cv_struct_tms=yes],[ac_cv_struct_tms=no])])
1666 if test $ac_cv_struct_tms = yes; then
1667   AC_DEFINE(HAVE_STRUCT_TMS, 1,
1668   [Define if <sys/times.h> defines struct tms.])
1669 fi
1670
1671 # use gcc_cv_* here because this doesn't match the behavior of AC_CHECK_TYPE.
1672 # revisit after autoconf 2.50.
1673 AC_CACHE_CHECK(for clock_t, gcc_cv_type_clock_t, [
1674 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1675 #include "ansidecl.h"
1676 #include "system.h"
1677 ]], [[clock_t x;]])],[gcc_cv_type_clock_t=yes],[gcc_cv_type_clock_t=no])])
1678 if test $gcc_cv_type_clock_t = yes; then
1679   AC_DEFINE(HAVE_CLOCK_T, 1,
1680   [Define if <time.h> defines clock_t.])
1681 fi
1682
1683 # Check if F_SETLKW is supported by fcntl.
1684 AC_CACHE_CHECK(for F_SETLKW, ac_cv_f_setlkw, [
1685 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1686 #include <fcntl.h>]], [[
1687 struct flock fl;
1688 fl.l_whence = 0;
1689 fl.l_start = 0;
1690 fl.l_len = 0;
1691 fl.l_pid = 0;
1692 return fcntl (1, F_SETLKW, &fl);]])],
1693 [ac_cv_f_setlkw=yes],[ac_cv_f_setlkw=no])])
1694 if test $ac_cv_f_setlkw = yes; then
1695   AC_DEFINE(HOST_HAS_F_SETLKW, 1,
1696   [Define if F_SETLKW supported by fcntl.])
1697 fi
1698
1699 # Check if O_CLOEXEC is defined by fcntl
1700 AC_CACHE_CHECK(for O_CLOEXEC, ac_cv_o_cloexec, [
1701 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1702 #include <fcntl.h>]], [[
1703 return open ("/dev/null", O_RDONLY | O_CLOEXEC);]])],
1704 [ac_cv_o_cloexec=yes],[ac_cv_o_cloexec=no])])
1705 if test $ac_cv_o_cloexec = yes; then
1706   AC_DEFINE(HOST_HAS_O_CLOEXEC, 1,
1707   [Define if O_CLOEXEC supported by fcntl.])
1708 fi
1709
1710 # Check if O_NONBLOCK is defined by fcntl
1711 AC_CHECK_HEADERS([fcntl.h])
1712 AC_CHECK_DECL(O_NONBLOCK,,,[#include <fcntl.h>])
1713 if test $ac_cv_have_decl_O_NONBLOCK = yes; then
1714   AC_DEFINE(HOST_HAS_O_NONBLOCK, 1,
1715   [Define if O_NONBLOCK supported by fcntl.])
1716 fi
1717
1718
1719 # C++ Modules would like some networking features to provide the mapping
1720 # server.  You can still use modules without them though.
1721 # The following network-related checks could probably do with some
1722 # Windows and other non-linux defenses and checking.
1723
1724 # Local socket connectivity wants AF_UNIX networking
1725 # Check for AF_UNIX networking
1726 AC_CACHE_CHECK(for AF_UNIX, ac_cv_af_unix, [
1727 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1728 #include <sys/types.h>
1729 #include <sys/socket.h>
1730 #include <sys/un.h>
1731 #include <netinet/in.h>]],[[
1732 sockaddr_un un;
1733 un.sun_family = AF_UNSPEC;
1734 int fd = socket (AF_UNIX, SOCK_STREAM, 0);
1735 connect (fd, (sockaddr *)&un, sizeof (un));]])],
1736 [ac_cv_af_unix=yes],
1737 [ac_cv_af_unix=no])])
1738 if test $ac_cv_af_unix = yes; then
1739   AC_DEFINE(HAVE_AF_UNIX, 1,
1740   [Define if AF_UNIX supported.])
1741 fi
1742
1743 # Remote socket connectivity wants AF_INET6 networking
1744 # Check for AF_INET6 networking
1745 AC_CACHE_CHECK(for AF_INET6, ac_cv_af_inet6, [
1746 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1747 #include <sys/types.h>
1748 #include <sys/socket.h>
1749 #include <netinet/in.h>
1750 #include <netdb.h>]],[[
1751 sockaddr_in6 in6;
1752 in6.sin6_family = AF_UNSPEC;
1753 struct addrinfo *addrs = 0;
1754 struct addrinfo hints;
1755 hints.ai_flags = 0;
1756 hints.ai_family = AF_INET6;
1757 hints.ai_socktype = SOCK_STREAM;
1758 hints.ai_protocol = 0;
1759 hints.ai_canonname = 0;
1760 hints.ai_addr = 0;
1761 hints.ai_next = 0;
1762 int e = getaddrinfo ("localhost", 0, &hints, &addrs);
1763 const char *str = gai_strerror (e);
1764 freeaddrinfo (addrs);
1765 int fd = socket (AF_INET6, SOCK_STREAM, 0);
1766 connect (fd, (sockaddr *)&in6, sizeof (in6));]])],
1767 [ac_cv_af_inet6=yes],
1768 [ac_cv_af_inet6=no])])
1769 if test $ac_cv_af_inet6 = yes; then
1770   AC_DEFINE(HAVE_AF_INET6, 1,
1771   [Define if AF_INET6 supported.])
1772 fi
1773
1774 # Check if _LK_LOCK is supported by _locking
1775 AC_CACHE_CHECK(for _LK_LOCK, ac_cv_lk_lock, [
1776 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1777 #include <io.h>
1778 #include <sys/locking.h>]], [[
1779   int fd;
1780   return _locking (fd, _LK_LOCK, 0);]])],
1781 [ac_cv_lk_lock=yes],[ac_cv_lk_lock=no])])
1782 if test $ac_cv_lk_lock = yes; then
1783   AC_DEFINE(HOST_HAS_LK_LOCK, 1,
1784   [Define if _LK_LOC supported by _locking.])
1785 fi
1786
1787 # Restore CFLAGS, CXXFLAGS from before the gcc_AC_NEED_DECLARATIONS tests.
1788 CFLAGS="$saved_CFLAGS"
1789 CXXFLAGS="$saved_CXXFLAGS"
1790
1791 # mkdir takes a single argument on some systems.
1792 gcc_AC_FUNC_MKDIR_TAKES_ONE_ARG
1793
1794 # File extensions
1795 manext='.1'
1796 objext='.o'
1797 AC_SUBST(manext)
1798 AC_SUBST(objext)
1799
1800 # With Setjmp/Longjmp based exception handling.
1801 AC_ARG_ENABLE(sjlj-exceptions,
1802 [AS_HELP_STRING([--enable-sjlj-exceptions],
1803                 [arrange to use setjmp/longjmp exception handling])],
1804 [case $target in
1805   lm32*-*-*)
1806      force_sjlj_exceptions=yes
1807      enableval=yes
1808      ;;
1809   *)
1810     force_sjlj_exceptions=no
1811     ;;
1812 esac])
1813 if test $force_sjlj_exceptions = yes; then
1814   sjlj=`if test $enableval = yes; then echo 1; else echo 0; fi`
1815   AC_DEFINE_UNQUOTED(CONFIG_SJLJ_EXCEPTIONS, $sjlj,
1816     [Define 0/1 to force the choice for exception handling model.])
1817 fi
1818
1819 # --------------------------------------------------------
1820 # Build, host, and target specific configuration fragments
1821 # --------------------------------------------------------
1822
1823 # Collect build-machine-specific information.
1824 . ${srcdir}/config.build || exit 1
1825
1826 # Collect host-machine-specific information.
1827 . ${srcdir}/config.host || exit 1
1828
1829 target_gtfiles=
1830
1831 # Collect target-machine-specific information.
1832 . ${srcdir}/config.gcc || exit 1
1833
1834 extra_objs="${host_extra_objs} ${extra_objs}"
1835 extra_gcc_objs="${host_extra_gcc_objs} ${extra_gcc_objs}"
1836
1837 # Default the target-machine variables that were not explicitly set.
1838 if test x"$tm_file" = x
1839 then tm_file=$cpu_type/$cpu_type.h; fi
1840
1841 if test x"$extra_headers" = x
1842 then extra_headers=; fi
1843
1844 if test x$md_file = x
1845 then md_file=$cpu_type/$cpu_type.md; fi
1846
1847 if test x$out_file = x
1848 then out_file=$cpu_type/$cpu_type.cc; fi
1849
1850 if test x"$tmake_file" = x
1851 then tmake_file=$cpu_type/t-$cpu_type
1852 fi
1853
1854 # Support --enable-initfini-array.
1855 if test x$enable_initfini_array != xno; then
1856   tm_file="${tm_file} initfini-array.h"
1857 fi
1858
1859 if test x"$dwarf2" = xyes
1860 then tm_file="$tm_file tm-dwarf2.h"
1861 fi
1862
1863 # Say what files are being used for the output code and MD file.
1864 echo "Using \`$srcdir/config/$out_file' for machine-specific logic."
1865 echo "Using \`$srcdir/config/$md_file' as machine description file."
1866
1867 # If any of the xm_file variables contain nonexistent files, warn
1868 # about them and drop them.
1869
1870 bx=
1871 for x in $build_xm_file; do
1872   if    test -f $srcdir/config/$x
1873   then      bx="$bx $x"
1874   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1875   fi
1876 done
1877 build_xm_file="$bx"
1878
1879 hx=
1880 for x in $host_xm_file; do
1881   if    test -f $srcdir/config/$x
1882   then      hx="$hx $x"
1883   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1884   fi
1885 done
1886 host_xm_file="$hx"
1887
1888 tx=
1889 for x in $xm_file; do
1890   if    test -f $srcdir/config/$x
1891   then      tx="$tx $x"
1892   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1893   fi
1894 done
1895 xm_file="$tx"
1896
1897 count=a
1898 for f in $tm_file; do
1899         count=${count}x
1900 done
1901 if test $count = ax; then
1902         echo "Using \`$srcdir/config/$tm_file' as target machine macro file."
1903 else
1904         echo "Using the following target machine macro files:"
1905         for f in $tm_file; do
1906                 echo "  $srcdir/config/$f"
1907         done
1908 fi
1909
1910 if test x$use_long_long_for_widest_fast_int = xyes; then
1911         AC_DEFINE(USE_LONG_LONG_FOR_WIDEST_FAST_INT, 1,
1912 [Define to 1 if the 'long long' type is wider than 'long' but still
1913 efficiently supported by the host hardware.])
1914 fi
1915
1916 gnu_ld_bool=`if test x"$gnu_ld" = x"yes"; then echo 1; else echo 0; fi`
1917 AC_DEFINE_UNQUOTED(HAVE_GNU_LD, $gnu_ld_bool, [Define to 1 if using GNU ld.])
1918
1919 gnu_as_bool=`if test x"$gas" = x"yes"; then echo 1; else echo 0; fi`
1920 AC_DEFINE_UNQUOTED(HAVE_GNU_AS, $gnu_as_bool, [Define to 1 if using GNU as.])
1921
1922 count=a
1923 for f in $host_xm_file; do
1924         count=${count}x
1925 done
1926 if test $count = a; then
1927         :
1928 elif test $count = ax; then
1929         echo "Using \`$srcdir/config/$host_xm_file' as host machine macro file."
1930 else
1931         echo "Using the following host machine macro files:"
1932         for f in $host_xm_file; do
1933                 echo "  $srcdir/config/$f"
1934         done
1935 fi
1936 echo "Using ${out_host_hook_obj} for host machine hooks."
1937
1938 if test "$host_xm_file" != "$build_xm_file"; then
1939         count=a
1940         for f in $build_xm_file; do
1941                 count=${count}x
1942         done
1943         if test $count = a; then
1944                 :
1945         elif test $count = ax; then
1946                 echo "Using \`$srcdir/config/$build_xm_file' as build machine macro file."
1947         else
1948                 echo "Using the following build machine macro files:"
1949                 for f in $build_xm_file; do
1950                         echo "  $srcdir/config/$f"
1951                 done
1952         fi
1953 fi
1954
1955 if test -n "$configured_native_system_header_dir"; then
1956   native_system_header_dir=$configured_native_system_header_dir
1957 fi
1958 NATIVE_SYSTEM_HEADER_DIR="$native_system_header_dir"
1959 AC_SUBST(NATIVE_SYSTEM_HEADER_DIR)
1960
1961 case ${host} in
1962   powerpc*-*-darwin*)
1963     AC_CACHE_CHECK([whether mcontext_t fields have underscores],
1964       gcc_cv_mcontext_underscores,
1965       AC_COMPILE_IFELSE([AC_LANG_SOURCE([
1966 #include <sys/cdefs.h>
1967 #include <sys/signal.h>
1968 #include <ucontext.h>
1969 int main() { mcontext_t m; if (m->ss.srr0) return 0; return 0; }
1970 ])],
1971         gcc_cv_mcontext_underscores=no, gcc_cv_mcontext_underscores=yes))
1972       if test $gcc_cv_mcontext_underscores = yes; then
1973         AC_DEFINE(HAS_MCONTEXT_T_UNDERSCORES,,dnl
1974           [mcontext_t fields start with __])
1975       fi
1976     ;;
1977 esac
1978
1979 # ---------
1980 # Threading
1981 # ---------
1982
1983 # Check if a valid thread package
1984 case ${enable_threads} in
1985   "" | no)
1986     # No threads
1987     target_thread_file='single'
1988     ;;
1989   yes)
1990     # default
1991     target_thread_file='single'
1992     ;;
1993   aix | dce | lynx | mipssde | posix | rtems | \
1994   single | tpf | vxworks | win32)
1995     target_thread_file=${enable_threads}
1996     ;;
1997   *)
1998     echo "${enable_threads} is an unknown thread package" 1>&2
1999     exit 1
2000     ;;
2001 esac
2002
2003 if test x${thread_file} = x; then
2004   # No thread file set by target-specific clauses in config.gcc,
2005   # so use file chosen by default logic above
2006   thread_file=${target_thread_file}
2007 fi
2008
2009 # --------
2010 # UNSORTED
2011 # --------
2012
2013 use_cxa_atexit=no
2014 if test x$enable___cxa_atexit = xyes || \
2015    test x$enable___cxa_atexit = x -a x$default_use_cxa_atexit = xyes; then
2016   if test x$host = x$target; then
2017     case $host in
2018       # mingw32 doesn't have __cxa_atexit but uses atexit registration
2019       # keyed to flag_use_cxa_atexit
2020       *-*-mingw32*)
2021         use_cxa_atexit=yes
2022         ;;
2023       powerpc-ibm-aix*)
2024         use_cxa_atexit=yes
2025         ;;
2026       *)
2027         AC_CHECK_FUNC(__cxa_atexit,[use_cxa_atexit=yes],
2028           [echo "__cxa_atexit can't be enabled on this target"])
2029         ;;
2030     esac
2031   else
2032     # We can't check for __cxa_atexit when building a cross, so assume
2033     # it is available
2034     use_cxa_atexit=yes
2035   fi
2036   if test x$use_cxa_atexit = xyes; then
2037     AC_DEFINE(DEFAULT_USE_CXA_ATEXIT, 2,
2038       [Define if you want to use __cxa_atexit, rather than atexit, to
2039       register C++ destructors for local statics and global objects.
2040       This is essential for fully standards-compliant handling of
2041       destructors, but requires __cxa_atexit in libc.])
2042   fi
2043 fi
2044
2045 # Look for a file containing extra machine modes.
2046 if test -n "$extra_modes" && test -f $srcdir/config/$extra_modes; then
2047   extra_modes_file='$(srcdir)'/config/${extra_modes}
2048   AC_SUBST(extra_modes_file)
2049   AC_DEFINE_UNQUOTED(EXTRA_MODES_FILE, "config/$extra_modes",
2050   [Define to the name of a file containing a list of extra machine modes
2051    for this architecture.])
2052 fi
2053
2054 # Convert extra_options into a form suitable for Makefile use.
2055 extra_opt_files=
2056 all_opt_files=
2057 for f in $extra_options; do
2058   extra_opt_files="$extra_opt_files \$(srcdir)/config/$f"
2059   all_opt_files="$all_opt_files $srcdir/config/$f"
2060 done
2061 AC_SUBST(extra_opt_files)
2062
2063 # auto-host.h is the file containing items generated by autoconf and is
2064 # the first file included by config.h.
2065 # If host=build, it is correct to have bconfig include auto-host.h
2066 # as well.  If host!=build, we are in error and need to do more
2067 # work to find out the build config parameters.
2068 if test x$host = x$build
2069 then
2070         build_auto=auto-host.h
2071         HAVE_AUTO_BUILD='# '
2072 else
2073         # We create a subdir, then run autoconf in the subdir.
2074         # To prevent recursion we set host and build for the new
2075         # invocation of configure to the build for this invocation
2076         # of configure.
2077         tempdir=build.$$
2078         rm -rf $tempdir
2079         mkdir $tempdir
2080         cd $tempdir
2081         case ${srcdir} in
2082         /* | [A-Za-z]:[\\/]* ) realsrcdir=${srcdir};;
2083         *) realsrcdir=../${srcdir};;
2084         esac
2085         # Clearing GMPINC is necessary to prevent host headers being
2086         # used by the build compiler.  Defining GENERATOR_FILE stops
2087         # system.h from including gmp.h.
2088         CC="${CC_FOR_BUILD}" CFLAGS="${CFLAGS_FOR_BUILD}" \
2089         CXX="${CXX_FOR_BUILD}" CXXFLAGS="${CXXFLAGS_FOR_BUILD}" \
2090         LD="${LD_FOR_BUILD}" LDFLAGS="${LDFLAGS_FOR_BUILD}" \
2091         GMPINC="" CPPFLAGS="${CPPFLAGS_FOR_BUILD} -DGENERATOR_FILE" \
2092         ${realsrcdir}/configure \
2093                 --enable-languages=${enable_languages-all} \
2094                 ${enable_obsolete+--enable-obsolete="$enable_obsolete"} \
2095                 ${enable_option_checking+--enable-option-checking="$enable_option_checking"} \
2096                 --target=$target_alias --host=$build_alias \
2097                 --build=$build_alias || exit # retaining $tempdir
2098
2099         # We just finished tests for the build machine, so rename
2100         # the file auto-build.h in the gcc directory.
2101         mv auto-host.h ../auto-build.h
2102         cd ..
2103         rm -rf $tempdir
2104         build_auto=auto-build.h
2105         HAVE_AUTO_BUILD=
2106 fi
2107 AC_SUBST(build_subdir)
2108 AC_SUBST(HAVE_AUTO_BUILD)
2109
2110 tm_file="${tm_file} defaults.h"
2111 tm_p_file="${tm_p_file} tm-preds.h"
2112 tm_d_file="${tm_d_file} defaults.h"
2113 host_xm_file="auto-host.h ansidecl.h ${host_xm_file}"
2114 build_xm_file="${build_auto} ansidecl.h ${build_xm_file}"
2115 # We don't want ansidecl.h in target files, write code there in ISO/GNU C.
2116 # put this back in temporarily.
2117 xm_file="auto-host.h ansidecl.h ${xm_file}"
2118
2119 # --------
2120 # UNSORTED
2121 # --------
2122
2123 changequote(,)dnl
2124 # Compile in configure arguments.
2125 if test -f configargs.h ; then
2126         # Being re-configured.
2127         gcc_config_arguments=`grep configuration_arguments configargs.h | sed -e 's/.*"\([^"]*\)".*/\1/'`
2128         gcc_reconf_arguments=`echo "$gcc_config_arguments" | sed -e 's/^.*\( : (reconfigured) .*$\)/\1/'`
2129         if [ "$gcc_reconf_arguments" != " : (reconfigured) $TOPLEVEL_CONFIGURE_ARGUMENTS" ]; then
2130                 gcc_config_arguments="$gcc_config_arguments : (reconfigured) $TOPLEVEL_CONFIGURE_ARGUMENTS"
2131         fi
2132 else
2133         gcc_config_arguments="$TOPLEVEL_CONFIGURE_ARGUMENTS"
2134 fi
2135
2136 # Double all backslashes and backslash all quotes to turn
2137 # gcc_config_arguments into a C string.
2138 sed -e 's/\\/\\\\/g; s/"/\\"/g' <<EOF >conftest.out
2139 $gcc_config_arguments
2140 EOF
2141 gcc_config_arguments_str=`cat conftest.out`
2142 rm -f conftest.out
2143
2144 cat > configargs.h <<EOF
2145 /* Generated automatically. */
2146 static const char configuration_arguments[] = "$gcc_config_arguments_str";
2147 static const char thread_model[] = "$thread_file";
2148
2149 static const struct {
2150   const char *name, *value;
2151 } configure_default_options[] = $configure_default_options;
2152 EOF
2153 changequote([,])dnl
2154
2155 changequote(,)dnl
2156 gcc_BASEVER=`cat $srcdir/BASE-VER`
2157 gcc_DEVPHASE=`cat $srcdir/DEV-PHASE`
2158 gcc_DATESTAMP=`cat $srcdir/DATESTAMP`
2159 if test -f $srcdir/REVISION ; then
2160         gcc_REVISION=`cat $srcdir/REVISION`
2161 else
2162         gcc_REVISION=""
2163 fi
2164 cat > plugin-version.h <<EOF
2165 #include "configargs.h"
2166
2167 #define GCCPLUGIN_VERSION_MAJOR   `echo $gcc_BASEVER | sed -e 's/^\([0-9]*\).*$/\1/'`
2168 #define GCCPLUGIN_VERSION_MINOR   `echo $gcc_BASEVER | sed -e 's/^[0-9]*\.\([0-9]*\).*$/\1/'`
2169 #define GCCPLUGIN_VERSION_PATCHLEVEL   `echo $gcc_BASEVER | sed -e 's/^[0-9]*\.[0-9]*\.\([0-9]*\)$/\1/'`
2170 #define GCCPLUGIN_VERSION  (GCCPLUGIN_VERSION_MAJOR*1000 + GCCPLUGIN_VERSION_MINOR)
2171
2172 static char basever[] = "$gcc_BASEVER";
2173 static char datestamp[] = "$gcc_DATESTAMP";
2174 static char devphase[] = "$gcc_DEVPHASE";
2175 static char revision[] = "$gcc_REVISION";
2176
2177 /* FIXME plugins: We should make the version information more precise.
2178    One way to do is to add a checksum. */
2179
2180 static struct plugin_gcc_version gcc_version = {basever, datestamp,
2181                                                 devphase, revision,
2182                                                 configuration_arguments};
2183 EOF
2184 changequote([,])dnl
2185
2186 # Determine what GCC version number to use in filesystem paths.
2187 GCC_BASE_VER
2188
2189 # Internationalization
2190 ZW_GNU_GETTEXT_SISTER_DIR
2191
2192 # If LIBINTL contains LIBICONV, then clear LIBICONV so we don't get
2193 # -liconv on the link line twice.
2194 case "$LIBINTL" in *$LIBICONV*)
2195         LIBICONV= ;;
2196 esac
2197
2198 AC_ARG_ENABLE(secureplt,
2199 [AS_HELP_STRING([--enable-secureplt],
2200                 [enable -msecure-plt by default for PowerPC])],
2201 [], [])
2202
2203 AC_ARG_ENABLE(mingw-wildcard,
2204 [AS_HELP_STRING([--enable-mingw-wildcard],
2205                 [Set whether to expand wildcard on command-line.
2206                  Default to platform configuration])],
2207 [],[enable_mingw_wildcard=platform])
2208 AS_IF([test x"$enable_mingw_wildcard" != xplatform ],
2209       [AC_DEFINE_UNQUOTED(MINGW_DOWILDCARD,
2210                  $(test x"$enable_mingw_wildcard" = xno; echo $?),
2211                  [Value to set mingw's _dowildcard to.])])
2212
2213 AC_ARG_ENABLE(large-address-aware,
2214 [AS_HELP_STRING([--enable-large-address-aware],
2215                 [Link mingw executables with --large-address-aware])])
2216 AS_IF([test x"$enable_large_address_aware" = xyes],
2217   [AC_DEFINE([MINGW_DEFAULT_LARGE_ADDR_AWARE], 1,
2218     [Define if we should link mingw executables with --large-address-aware])])
2219
2220 AC_ARG_ENABLE(leading-mingw64-underscores,
2221   AS_HELP_STRING([--enable-leading-mingw64-underscores],
2222                  [enable leading underscores on 64 bit mingw targets]),
2223   [],[])
2224 AS_IF([ test x"$enable_leading_mingw64_underscores" = xyes ],
2225   [AC_DEFINE(USE_MINGW64_LEADING_UNDERSCORES, 1,
2226     [Define if we should use leading underscore on 64 bit mingw targets])])
2227
2228 AC_ARG_ENABLE(cld,
2229 [AS_HELP_STRING([--enable-cld], [enable -mcld by default for 32bit x86])], [],
2230 [enable_cld=no])
2231
2232 AC_ARG_ENABLE(frame-pointer,
2233 [AS_HELP_STRING([--enable-frame-pointer],
2234                 [enable -fno-omit-frame-pointer by default for x86])], [],
2235 [
2236 case $target_os in
2237 linux* | gnu* | darwin[[8912]]* | cygwin* | mingw*)
2238   # Enable -fomit-frame-pointer by default for these systems with DWARF2.
2239   enable_frame_pointer=no
2240   ;;
2241 *)
2242   enable_frame_pointer=yes
2243   ;;
2244 esac
2245 ])
2246
2247 case $target in
2248 i[[34567]]86-*-* | x86_64-*-*)
2249         if test "x$enable_cld" = xyes; then
2250                 tm_defines="${tm_defines} USE_IX86_CLD=1"
2251         fi
2252         if test "x$enable_frame_pointer" = xyes; then
2253                 tm_defines="${tm_defines} USE_IX86_FRAME_POINTER=1"
2254         fi
2255         ;;
2256 esac
2257
2258 # Windows32 Registry support for specifying GCC installation paths.
2259 AC_ARG_ENABLE(win32-registry,
2260 [AS_HELP_STRING([--disable-win32-registry],
2261                 [disable lookup of installation paths in the
2262                  Registry on Windows hosts])
2263 AS_HELP_STRING([--enable-win32-registry], [enable registry lookup (default)])
2264 AS_HELP_STRING([--enable-win32-registry=KEY],
2265                [use KEY instead of GCC version as the last portion
2266                 of the registry key])],,)
2267
2268 case $host_os in
2269   win32 | pe | cygwin* | mingw32*)
2270     if test "x$enable_win32_registry" != xno; then
2271       AC_SEARCH_LIBS(RegOpenKeyExA, advapi32,, [enable_win32_registry=no])
2272     fi
2273
2274     if test "x$enable_win32_registry" != xno; then
2275       AC_DEFINE(ENABLE_WIN32_REGISTRY, 1,
2276   [Define to 1 if installation paths should be looked up in the Windows
2277    Registry. Ignored on non-Windows hosts.])
2278
2279       if test "x$enable_win32_registry" != xyes \
2280          && test "x$enable_win32_registry" != x; then
2281         AC_DEFINE_UNQUOTED(WIN32_REGISTRY_KEY, "$enable_win32_registry",
2282   [Define to be the last component of the Windows registry key under which
2283    to look for installation paths.  The full key used will be
2284    HKEY_LOCAL_MACHINE/SOFTWARE/Free Software Foundation/{WIN32_REGISTRY_KEY}.
2285    The default is the GCC version number.])
2286       fi
2287     fi
2288   ;;
2289 esac
2290
2291 # Get an absolute path to the GCC top-level source directory
2292 holddir=`${PWDCMD-pwd}`
2293 cd $srcdir
2294 topdir=`${PWDCMD-pwd}`
2295 cd $holddir
2296
2297 # Conditionalize the makefile for this host machine.
2298 xmake_file=
2299 for f in ${host_xmake_file}
2300 do
2301         if test -f ${srcdir}/config/$f
2302         then
2303                 xmake_file="${xmake_file} \$(srcdir)/config/$f"
2304         fi
2305 done
2306
2307 # Conditionalize the makefile for this target machine.
2308 tmake_file_=
2309 for f in ${tmake_file}
2310 do
2311         if test -f ${srcdir}/config/$f
2312         then
2313                 tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
2314         fi
2315 done
2316 tmake_file="${tmake_file_}${omp_device_property_tmake_file}"
2317
2318 out_object_file=`basename $out_file .cc`.o
2319 common_out_object_file=`basename $common_out_file .cc`.o
2320
2321 tm_file_list="options.h"
2322 tm_include_list="options.h insn-constants.h"
2323 for f in $tm_file; do
2324   case $f in
2325     ./* )
2326        f=`echo $f | sed 's/^..//'`
2327        tm_file_list="${tm_file_list} $f"
2328        tm_include_list="${tm_include_list} $f"
2329        ;;
2330     defaults.h )
2331        tm_file_list="${tm_file_list} \$(srcdir)/$f"
2332        tm_include_list="${tm_include_list} $f"
2333        ;;
2334     * )
2335        tm_file_list="${tm_file_list} \$(srcdir)/config/$f"
2336        tm_include_list="${tm_include_list} config/$f"
2337        ;;
2338   esac
2339 done
2340
2341 tm_p_file_list=
2342 tm_p_include_list=
2343 for f in $tm_p_file; do
2344   case $f in
2345     tm-preds.h )
2346        tm_p_file_list="${tm_p_file_list} $f"
2347        tm_p_include_list="${tm_p_include_list} $f"
2348        ;;
2349     * )
2350        tm_p_file_list="${tm_p_file_list} \$(srcdir)/config/$f"
2351        tm_p_include_list="${tm_p_include_list} config/$f"
2352   esac
2353 done
2354
2355 tm_d_file_list=
2356 tm_d_include_list="options.h insn-constants.h"
2357 for f in $tm_d_file; do
2358   case $f in
2359     defaults.h )
2360        tm_d_file_list="${tm_d_file_list} \$(srcdir)/$f"
2361        tm_d_include_list="${tm_d_include_list} $f"
2362        ;;
2363     * )
2364        tm_d_file_list="${tm_d_file_list} \$(srcdir)/config/$f"
2365        tm_d_include_list="${tm_d_include_list} config/$f"
2366        ;;
2367   esac
2368 done
2369
2370 xm_file_list=
2371 xm_include_list=
2372 for f in $xm_file; do
2373   case $f in
2374     ansidecl.h )
2375        xm_file_list="${xm_file_list} \$(srcdir)/../include/$f"
2376        xm_include_list="${xm_include_list} $f"
2377        ;;
2378     auto-host.h )
2379        xm_file_list="${xm_file_list} $f"
2380        xm_include_list="${xm_include_list} $f"
2381        ;;
2382     * )
2383        xm_file_list="${xm_file_list} \$(srcdir)/config/$f"
2384        xm_include_list="${xm_include_list} config/$f"
2385        ;;
2386   esac
2387 done
2388
2389 host_xm_file_list=
2390 host_xm_include_list=
2391 for f in $host_xm_file; do
2392   case $f in
2393     ansidecl.h )
2394        host_xm_file_list="${host_xm_file_list} \$(srcdir)/../include/$f"
2395        host_xm_include_list="${host_xm_include_list} $f"
2396        ;;
2397     auto-host.h )
2398        host_xm_file_list="${host_xm_file_list} $f"
2399        host_xm_include_list="${host_xm_include_list} $f"
2400        ;;
2401     * )
2402        host_xm_file_list="${host_xm_file_list} \$(srcdir)/config/$f"
2403        host_xm_include_list="${host_xm_include_list} config/$f"
2404        ;;
2405   esac
2406 done
2407
2408 build_xm_file_list=
2409 for f in $build_xm_file; do
2410   case $f in
2411     ansidecl.h )
2412        build_xm_file_list="${build_xm_file_list} \$(srcdir)/../include/$f"
2413        build_xm_include_list="${build_xm_include_list} $f"
2414        ;;
2415     auto-build.h | auto-host.h )
2416        build_xm_file_list="${build_xm_file_list} $f"
2417        build_xm_include_list="${build_xm_include_list} $f"
2418        ;;
2419     * )
2420        build_xm_file_list="${build_xm_file_list} \$(srcdir)/config/$f"
2421        build_xm_include_list="${build_xm_include_list} config/$f"
2422        ;;
2423   esac
2424 done
2425
2426 # Define macro CROSS_DIRECTORY_STRUCTURE in compilation if this is a
2427 # cross-compiler which does not use the native headers and libraries.
2428 # Also use all.cross instead of all.internal and adjust SYSTEM_HEADER_DIR.
2429 CROSS=                                          AC_SUBST(CROSS)
2430 ALL=all.internal                                AC_SUBST(ALL)
2431 SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)' AC_SUBST(SYSTEM_HEADER_DIR)
2432 BUILD_SYSTEM_HEADER_DIR=$SYSTEM_HEADER_DIR      AC_SUBST(BUILD_SYSTEM_HEADER_DIR)
2433
2434 if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x ||
2435    test x$build != x$host || test "x$with_build_sysroot" != x; then
2436   if test "x$with_build_sysroot" != x; then
2437     BUILD_SYSTEM_HEADER_DIR=$with_build_sysroot'$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
2438   else
2439     BUILD_SYSTEM_HEADER_DIR='$(CROSS_SYSTEM_HEADER_DIR)'
2440   fi
2441
2442   if test x$host != x$target
2443   then
2444     CROSS="-DCROSS_DIRECTORY_STRUCTURE"
2445     ALL=all.cross
2446     SYSTEM_HEADER_DIR=$BUILD_SYSTEM_HEADER_DIR
2447   elif test "x$TARGET_SYSTEM_ROOT" != x; then
2448     SYSTEM_HEADER_DIR='$(CROSS_SYSTEM_HEADER_DIR)'
2449   fi
2450
2451   if test "x$with_build_sysroot" != "x"; then
2452     target_header_dir="${with_build_sysroot}${native_system_header_dir}"
2453   elif test "x$with_sysroot" = x; then
2454     target_header_dir="${test_exec_prefix}/${target_noncanonical}/sys-include"
2455   elif test "x$with_sysroot" = xyes; then
2456     target_header_dir="${test_exec_prefix}/${target_noncanonical}/sys-root${native_system_header_dir}"
2457   else
2458     target_header_dir="${with_sysroot}${native_system_header_dir}"
2459   fi
2460 else
2461   target_header_dir=${native_system_header_dir}
2462 fi
2463
2464 # If this is a cross-compiler that does not
2465 # have its own set of headers then define
2466 # inhibit_libc
2467
2468 # If this is using newlib, without having the headers available now,
2469 # then define inhibit_libc in LIBGCC2_CFLAGS.
2470 # This prevents libgcc2 from containing any code which requires libc
2471 # support.
2472 : ${inhibit_libc=false}
2473 if { { test x$host != x$target && test "x$with_sysroot" = x ; } ||
2474        test x$with_newlib = xyes ; } &&
2475      { test "x$with_headers" = xno || test ! -f "$target_header_dir/stdio.h"; } ; then
2476        inhibit_libc=true
2477 fi
2478 AC_SUBST(inhibit_libc)
2479
2480 # When building gcc with a cross-compiler, we need to adjust things so
2481 # that the generator programs are still built with the native compiler.
2482 # Also, we cannot run fixincludes.
2483
2484 # These are the normal (build=host) settings:
2485 CC_FOR_BUILD='$(CC)'            AC_SUBST(CC_FOR_BUILD)
2486 CXX_FOR_BUILD='$(CXX)'          AC_SUBST(CXX_FOR_BUILD)
2487 BUILD_CFLAGS='$(ALL_CFLAGS)'    AC_SUBST(BUILD_CFLAGS)
2488 BUILD_CXXFLAGS='$(ALL_CXXFLAGS)' AC_SUBST(BUILD_CXXFLAGS)
2489 BUILD_LDFLAGS='$(LDFLAGS)'      AC_SUBST(BUILD_LDFLAGS)
2490 STMP_FIXINC=stmp-fixinc         AC_SUBST(STMP_FIXINC)
2491
2492 # And these apply if build != host, or we are generating coverage data
2493 if test x$build != x$host || test "x$coverage_flags" != x
2494 then
2495     BUILD_CFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS-$@) $(CFLAGS_FOR_BUILD)'
2496     BUILD_CXXFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS-$@) $(CXXFLAGS_FOR_BUILD)'
2497     BUILD_LDFLAGS='$(LDFLAGS_FOR_BUILD)'
2498 fi
2499
2500
2501 if test x$enable_fixincludes = xno;
2502 then
2503     STMP_FIXINC=''
2504 fi
2505
2506 # Expand extra_headers to include complete path.
2507 # This substitutes for lots of t-* files.
2508 extra_headers_list=
2509 # Prepend $(srcdir)/config/${cpu_type}/ to every entry in extra_headers.
2510 for file in ${extra_headers} ; do
2511   extra_headers_list="${extra_headers_list} \$(srcdir)/config/${cpu_type}/${file}"
2512 done
2513
2514 # If use_gcc_tgmath is set, append ginclude/tgmath.h.
2515 if test x"$use_gcc_tgmath" = xyes
2516 then extra_headers_list="${extra_headers_list} \$(srcdir)/ginclude/tgmath.h"
2517 fi
2518
2519 # Define collect2 in Makefile.
2520 case $host_can_use_collect2 in
2521   no) collect2= ;;
2522   *) collect2='collect2$(exeext)' ;;
2523 esac
2524 AC_SUBST([collect2])
2525
2526 # Add a definition of USE_COLLECT2 if system wants one.
2527 case $use_collect2 in
2528   no) use_collect2= ;;
2529   "") ;;
2530   *)
2531     host_xm_defines="${host_xm_defines} USE_COLLECT2"
2532     xm_defines="${xm_defines} USE_COLLECT2"
2533     case $host_can_use_collect2 in
2534       no)
2535         AC_MSG_ERROR([collect2 is required but cannot be built on this system])
2536         ;;
2537     esac
2538     ;;
2539 esac
2540
2541 AC_DEFINE_UNQUOTED(LTOPLUGINSONAME,"${host_lto_plugin_soname}",
2542 [Define to the name of the LTO plugin DSO that must be
2543   passed to the linker's -plugin=LIB option.])
2544
2545 # ---------------------------
2546 # Assembler & linker features
2547 # ---------------------------
2548
2549 # During stage 2, ld is actually gcc/collect-ld, which is a small script to
2550 # discern between when to use prev-ld/ld-new and when to use ld/ld-new.
2551 # However when ld-new is first executed from the build tree, libtool will
2552 # relink it as .libs/lt-ld-new, so that it can give it an RPATH that refers
2553 # to the build tree.  While doing this we need to use the previous-stage
2554 # linker, or we have an infinite loop.  The presence of a shell script as
2555 # ld/ld-new, and the fact that the script *uses ld itself*, is what confuses
2556 # the gcc/collect-ld script.  So we need to know how libtool works, or
2557 # exec-tool will fail.
2558
2559 m4_defun([_LT_CONFIG_COMMANDS], [])
2560 AC_PROG_LIBTOOL
2561 AC_SUBST(objdir)
2562 AC_SUBST(enable_fast_install)
2563
2564 # Identify the assembler which will work hand-in-glove with the newly
2565 # built GCC, so that we can examine its features.  This is the assembler
2566 # which will be driven by the driver program.
2567 #
2568 # If build != host, and we aren't building gas in-tree, we identify a
2569 # build->target assembler and hope that it will have the same features
2570 # as the host->target assembler we'll be using.
2571 gcc_cv_as_gas_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gas
2572
2573 m4_pattern_allow([AS_FOR_TARGET])dnl
2574 AS_VAR_SET_IF(gcc_cv_as,, [
2575 if test -x "$DEFAULT_ASSEMBLER"; then
2576         gcc_cv_as="$DEFAULT_ASSEMBLER"
2577 elif test -f $gcc_cv_as_gas_srcdir/configure.ac \
2578      && test -f ../gas/Makefile \
2579      && test x$build = x$host; then
2580         gcc_cv_as=../gas/as-new$build_exeext
2581 elif test -x as$build_exeext; then
2582         # Build using assembler in the current directory.
2583         gcc_cv_as=./as$build_exeext
2584 elif ( set dummy $AS_FOR_TARGET; test -x $[2] ); then
2585         gcc_cv_as="$AS_FOR_TARGET"
2586 else
2587         AC_PATH_PROG(gcc_cv_as, $AS_FOR_TARGET)
2588 fi])
2589
2590 ORIGINAL_AS_FOR_TARGET=$gcc_cv_as
2591 AC_SUBST(ORIGINAL_AS_FOR_TARGET)
2592 case "$ORIGINAL_AS_FOR_TARGET" in
2593   ./as | ./as$build_exeext) ;;
2594   *) AC_CONFIG_FILES(as:exec-tool.in, [chmod +x as]) ;;
2595 esac
2596
2597 default_ld=
2598 AC_ARG_ENABLE(ld,
2599 [[  --enable-ld[=ARG]       build ld [ARG={default,yes,no}]]],
2600 [case "${enableval}" in
2601  no)
2602    default_ld=ld.gold
2603    ;;
2604  esac])
2605
2606 install_gold_as_default=no
2607 AC_ARG_ENABLE(gold,
2608 [[  --enable-gold[=ARG]     build gold [ARG={default,yes,no}]]],
2609 [case "${enableval}" in
2610  default)
2611    install_gold_as_default=yes
2612    ;;
2613  yes)
2614    if test x${default_ld} != x; then
2615      install_gold_as_default=yes
2616    fi
2617    ;;
2618  no)
2619    ;;
2620  *)
2621    AC_MSG_ERROR([invalid --enable-gold argument])
2622    ;;
2623  esac])
2624
2625 # Identify the linker which will work hand-in-glove with the newly
2626 # built GCC, so that we can examine its features.  This is the linker
2627 # which will be driven by the driver program.
2628 #
2629 # If build != host, and we aren't building gas in-tree, we identify a
2630 # build->target linker and hope that it will have the same features
2631 # as the host->target linker we'll be using.
2632 gcc_cv_gld_major_version=
2633 gcc_cv_gld_minor_version=
2634 gcc_cv_ld_gld_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/ld
2635 gcc_cv_ld_gold_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gold
2636 gcc_cv_ld_bfd_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/bfd
2637
2638 AS_VAR_SET_IF(gcc_cv_ld,, [
2639 if test -x "$DEFAULT_LINKER"; then
2640         gcc_cv_ld="$DEFAULT_LINKER"
2641 elif test $install_gold_as_default = yes \
2642      && test -f $gcc_cv_ld_gold_srcdir/configure.ac \
2643      && test -f ../gold/Makefile \
2644      && test x$build = x$host; then
2645         gcc_cv_ld=../gold/ld-new$build_exeext
2646 elif test -f $gcc_cv_ld_gld_srcdir/configure.ac \
2647      && test -f ../ld/Makefile \
2648      && test x$build = x$host; then
2649         gcc_cv_ld=../ld/ld-new$build_exeext
2650 elif test -x collect-ld$build_exeext; then
2651         # Build using linker in the current directory.
2652         gcc_cv_ld=./collect-ld$build_exeext
2653 elif ( set dummy $LD_FOR_TARGET; test -x $[2] ); then
2654         gcc_cv_ld="$LD_FOR_TARGET"
2655 else
2656         AC_PATH_PROG(gcc_cv_ld, $LD_FOR_TARGET)
2657 fi])
2658
2659 ORIGINAL_PLUGIN_LD_FOR_TARGET=$gcc_cv_ld
2660 PLUGIN_LD_SUFFIX=`basename $gcc_cv_ld | sed -e "s,$target_alias-,,"`
2661 # if the PLUGIN_LD is set ld-new, just have it as ld
2662 # as that is the installed named.
2663 if test x$PLUGIN_LD_SUFFIX = xld-new \
2664    || test x$PLUGIN_LD_SUFFIX = xcollect-ld ; then
2665   PLUGIN_LD_SUFFIX=ld
2666 fi
2667 AC_ARG_WITH(plugin-ld,
2668 [AS_HELP_STRING([[--with-plugin-ld=[ARG]]], [specify the plugin linker])],
2669 [if test x"$withval" != x; then
2670    ORIGINAL_PLUGIN_LD_FOR_TARGET="$withval"
2671    PLUGIN_LD_SUFFIX="$withval"
2672  fi])
2673 AC_SUBST(ORIGINAL_PLUGIN_LD_FOR_TARGET)
2674 AC_DEFINE_UNQUOTED(PLUGIN_LD_SUFFIX, "$PLUGIN_LD_SUFFIX", [Specify plugin linker])
2675
2676 # Check to see if we are using gold instead of ld
2677 AC_MSG_CHECKING(whether we are using gold)
2678 ld_is_gold=no
2679 if test x$gcc_cv_ld != x; then
2680   if $gcc_cv_ld --version 2>/dev/null | sed 1q \
2681      | grep "GNU gold" > /dev/null; then
2682     ld_is_gold=yes
2683   fi
2684 fi
2685 AC_MSG_RESULT($ld_is_gold)
2686
2687 # Check to see if we are using mold instead of ld
2688 AC_MSG_CHECKING(whether we are using mold)
2689 ld_is_mold=no
2690 if test x$gcc_cv_ld != x; then
2691   if $gcc_cv_ld --version 2>/dev/null | sed 1q \
2692      | grep "mold" > /dev/null; then
2693     ld_is_mold=yes
2694   fi
2695 fi
2696 AC_MSG_RESULT($ld_is_mold)
2697
2698
2699 AC_MSG_CHECKING(gold linker with split stack support as non default)
2700 # Check to see if default ld is not gold, but gold is
2701 # available and has support for split stack.  If gcc was configured
2702 # with gold then no checking is done.
2703 #
2704 if test x$ld_is_gold = xno && which ${gcc_cv_ld}.gold >/dev/null 2>&1; then
2705
2706 # For platforms other than powerpc64*, enable as appropriate.
2707
2708   gold_non_default=no
2709   ld_gold=`which ${gcc_cv_ld}.gold`
2710 # Make sure this gold has minimal split stack support
2711   if $ld_gold --help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
2712     ld_vers=`$ld_gold --version | sed 1q`
2713     gold_vers=`echo $ld_vers | sed -n \
2714           -e 's,^[[^)]]*[[  ]]\([[0-9]][[0-9]]*\.[[0-9]][[0-9]]*[[^)]]*\)) .*$,\1,p'`
2715     case $target in
2716 # check that the gold version contains the complete split stack support
2717 # on powerpc64 big and little endian
2718       powerpc64*-*-*)
2719         case "$gold_vers" in
2720           2.25.[[1-9]]*|2.2[[6-9]][[.0-9]]*|2.[[3-9]][[.0-9]]*|[[3-9]].[[.0-9]]*) gold_non_default=yes
2721           ;;
2722           *) gold_non_default=no
2723           ;;
2724         esac
2725         ;;
2726     esac
2727   fi
2728   if test $gold_non_default = yes; then
2729     AC_DEFINE(HAVE_GOLD_NON_DEFAULT_SPLIT_STACK, 1,
2730             [Define if the gold linker supports split stack and is available as a non-default])
2731   fi
2732 fi
2733 AC_MSG_RESULT($gold_non_default)
2734
2735 ORIGINAL_LD_FOR_TARGET=$gcc_cv_ld
2736 AC_SUBST(ORIGINAL_LD_FOR_TARGET)
2737 case "$ORIGINAL_LD_FOR_TARGET" in
2738   ./collect-ld | ./collect-ld$build_exeext) ;;
2739   *) AC_CONFIG_FILES(collect-ld:exec-tool.in, [chmod +x collect-ld]) ;;
2740 esac
2741
2742 AC_MSG_CHECKING(what linker to use)
2743 if test "$gcc_cv_ld" = ../ld/ld-new$build_exeext \
2744    || test "$gcc_cv_ld" = ../gold/ld-new$build_exeext; then
2745         # Single tree build which includes ld.  We want to prefer it
2746         # over whatever linker top-level may have detected, since
2747         # we'll use what we're building after installation anyway.
2748         AC_MSG_RESULT(newly built ld)
2749         in_tree_ld=yes
2750         in_tree_ld_is_elf=no
2751         if (grep 'EMUL = .*elf' ../ld/Makefile \
2752             || grep 'EMUL = .*linux' ../ld/Makefile \
2753             || grep 'EMUL = .*lynx' ../ld/Makefile) > /dev/null; then
2754           in_tree_ld_is_elf=yes
2755         elif test "$ld_is_gold" = yes; then
2756           in_tree_ld_is_elf=yes
2757         fi
2758         for f in $gcc_cv_ld_bfd_srcdir/configure $gcc_cv_ld_gld_srcdir/configure $gcc_cv_ld_gld_srcdir/configure.ac $gcc_cv_ld_gld_srcdir/Makefile.in
2759         do
2760 changequote(,)dnl
2761                 gcc_cv_gld_version=`sed -n -e 's/^[     ]*VERSION=[^0-9A-Za-z_]*\([0-9]*\.[0-9]*.*\)/VERSION=\1/p' < $f`
2762                 if test x$gcc_cv_gld_version != x; then
2763                         break
2764                 fi
2765         done
2766         case $gcc_cv_gld_version in
2767           VERSION=[0-9]*) ;;
2768 changequote([,])dnl
2769           *) AC_MSG_ERROR([[cannot find version of in-tree linker]]) ;;
2770 changequote(,)dnl
2771         esac
2772         gcc_cv_gld_major_version=`expr "$gcc_cv_gld_version" : "VERSION=\([0-9]*\)"`
2773         gcc_cv_gld_minor_version=`expr "$gcc_cv_gld_version" : "VERSION=[0-9]*\.\([0-9]*\)"`
2774 changequote([,])dnl
2775         ORIGINAL_LD_BFD_FOR_TARGET=../ld/ld-new$build_exeext
2776         ORIGINAL_LD_GOLD_FOR_TARGET=../gold/ld-new$build_exeext
2777 else
2778         AC_MSG_RESULT($gcc_cv_ld)
2779         in_tree_ld=no
2780         gcc_cvs_ld_program=`dirname $gcc_cv_ld`/`basename $gcc_cv_ld $host_exeext`
2781         ORIGINAL_LD_BFD_FOR_TARGET=${gcc_cvs_ld_program}.bfd$host_exeext
2782         ORIGINAL_LD_GOLD_FOR_TARGET=${gcc_cvs_ld_program}.gold$host_exeext
2783 fi
2784
2785 AC_SUBST(ORIGINAL_LD_BFD_FOR_TARGET)
2786 AC_SUBST(ORIGINAL_LD_GOLD_FOR_TARGET)
2787
2788 # Figure out what nm we will be using.
2789 gcc_cv_binutils_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/binutils
2790 AS_VAR_SET_IF(gcc_cv_nm,, [
2791 if test -f $gcc_cv_binutils_srcdir/configure.ac \
2792      && test -f ../binutils/Makefile \
2793      && test x$build = x$host; then
2794         gcc_cv_nm=../binutils/nm-new$build_exeext
2795 elif test -x nm$build_exeext; then
2796         gcc_cv_nm=./nm$build_exeext
2797 elif ( set dummy $NM_FOR_TARGET; test -x $[2] ); then
2798         gcc_cv_nm="$NM_FOR_TARGET"
2799 else
2800         AC_PATH_PROG(gcc_cv_nm, $NM_FOR_TARGET)
2801 fi])
2802
2803 AC_MSG_CHECKING(what nm to use)
2804 if test "$gcc_cv_nm" = ../binutils/nm-new$build_exeext; then
2805         # Single tree build which includes binutils.
2806         AC_MSG_RESULT(newly built nm)
2807         in_tree_nm=yes
2808 else
2809         AC_MSG_RESULT($gcc_cv_nm)
2810         in_tree_nm=no
2811 fi
2812
2813 ORIGINAL_NM_FOR_TARGET=$gcc_cv_nm
2814 AC_SUBST(ORIGINAL_NM_FOR_TARGET)
2815 case "$ORIGINAL_NM_FOR_TARGET" in
2816   ./nm | ./nm$build_exeext) ;;
2817   *) AC_CONFIG_FILES(nm:exec-tool.in, [chmod +x nm]) ;;
2818 esac
2819
2820
2821 # Figure out what objdump we will be using.
2822 AS_VAR_SET_IF(gcc_cv_objdump,, [
2823 if test -f $gcc_cv_binutils_srcdir/configure.ac \
2824      && test -f ../binutils/Makefile \
2825      && test x$build = x$host; then
2826         # Single tree build which includes binutils.
2827         gcc_cv_objdump=../binutils/objdump$build_exeext
2828 elif test -x objdump$build_exeext; then
2829         gcc_cv_objdump=./objdump$build_exeext
2830 elif ( set dummy $OBJDUMP_FOR_TARGET; test -x $[2] ); then
2831         gcc_cv_objdump="$OBJDUMP_FOR_TARGET"
2832 else
2833         AC_PATH_PROG(gcc_cv_objdump, $OBJDUMP_FOR_TARGET)
2834 fi])
2835
2836 AC_MSG_CHECKING(what objdump to use)
2837 if test "$gcc_cv_objdump" = ../binutils/objdump$build_exeext; then
2838         # Single tree build which includes binutils.
2839         AC_MSG_RESULT(newly built objdump)
2840 elif test x$gcc_cv_objdump = x; then
2841         AC_MSG_RESULT(not found)
2842 else
2843         AC_MSG_RESULT($gcc_cv_objdump)
2844 fi
2845
2846 # Figure out what readelf we will be using.
2847 AS_VAR_SET_IF(gcc_cv_readelf,, [
2848 if test -f $gcc_cv_binutils_srcdir/configure.ac \
2849      && test -f ../binutils/Makefile \
2850      && test x$build = x$host; then
2851         # Single tree build which includes binutils.
2852         gcc_cv_readelf=../binutils/readelf$build_exeext
2853 elif test -x readelf$build_exeext; then
2854         gcc_cv_readelf=./readelf$build_exeext
2855 elif ( set dummy $READELF_FOR_TARGET; test -x $[2] ); then
2856         gcc_cv_readelf="$READELF_FOR_TARGET"
2857 else
2858         AC_PATH_PROG(gcc_cv_readelf, $READELF_FOR_TARGET)
2859 fi])
2860
2861 AC_MSG_CHECKING(what readelf to use)
2862 if test "$gcc_cv_readelf" = ../binutils/readelf$build_exeext; then
2863         # Single tree build which includes binutils.
2864         AC_MSG_RESULT(newly built readelf)
2865 elif test x$gcc_cv_readelf = x; then
2866         AC_MSG_RESULT(not found)
2867 else
2868         AC_MSG_RESULT($gcc_cv_readelf)
2869 fi
2870
2871 # Figure out what otool we will be using.
2872 AS_VAR_SET_IF(gcc_cv_otool,, [
2873 if test -x otool$build_exeext; then
2874         gcc_cv_otool=./otool$build_exeext
2875 elif ( set dummy $OTOOL_FOR_TARGET; test -x $[2] ); then
2876         gcc_cv_otool="$OTOOL_FOR_TARGET"
2877 else
2878         AC_PATH_PROG(gcc_cv_otool, $OTOOL_FOR_TARGET)
2879 fi])
2880
2881 AC_MSG_CHECKING(what otool to use)
2882 if test x$gcc_cv_otool = x; then
2883         AC_MSG_RESULT(not found)
2884 else
2885         AC_MSG_RESULT($gcc_cv_otool)
2886 fi
2887
2888 # Figure out the dsymutil we will use.
2889 AS_VAR_SET_IF(gcc_cv_dsymutil,, [
2890 if test -x "$DEFAULT_DSYMUTIL"; then
2891     gcc_cv_dsymutil="$DEFAULT_DSYMUTIL"
2892 elif test -x dsymutil$build_exeext; then
2893     gcc_cv_dsymutil=./dsymutil$build_exeext
2894 elif ( set dummy $DSYMUTIL_FOR_TARGET; test -x $[2] ); then
2895     gcc_cv_dsymutil=$DSYMUTIL_FOR_TARGET
2896 elif ( set dummy $DSYMUTIL; test -x $[2] ); then
2897     gcc_cv_dsymutil=$DSYMUTIL
2898 else
2899     AC_PATH_PROG(gcc_cv_dsymutil, $DSYMUTIL_FOR_TARGET)
2900 fi])
2901
2902 ORIGINAL_DSYMUTIL_FOR_TARGET=$gcc_cv_dsymutil
2903 AC_SUBST(ORIGINAL_DSYMUTIL_FOR_TARGET)
2904 case "$ORIGINAL_DSYMUTIL_FOR_TARGET" in
2905   ./dsymutil | ./dsymutil$build_exeext) ;;
2906   *) AC_CONFIG_FILES(dsymutil:exec-tool.in, [chmod +x dsymutil]) ;;
2907 esac
2908
2909 # Figure out what assembler alignment features are present.
2910 gcc_GAS_CHECK_FEATURE([.balign and .p2align], gcc_cv_as_balign_and_p2align,,
2911 [.balign 4
2912 .p2align 2],,
2913 [AC_DEFINE(HAVE_GAS_BALIGN_AND_P2ALIGN, 1,
2914   [Define if your assembler supports .balign and .p2align.])])
2915
2916 gcc_GAS_CHECK_FEATURE([.p2align with maximum skip], gcc_cv_as_max_skip_p2align,,
2917  [.p2align 4,,7],,
2918 [AC_DEFINE(HAVE_GAS_MAX_SKIP_P2ALIGN, 1,
2919   [Define if your assembler supports specifying the maximum number
2920    of bytes to skip when using the GAS .p2align command.])])
2921
2922 gcc_GAS_CHECK_FEATURE([.literal16], gcc_cv_as_literal16,,
2923  [.literal16],,
2924 [AC_DEFINE(HAVE_GAS_LITERAL16, 1,
2925   [Define if your assembler supports .literal16.])])
2926
2927 gcc_GAS_CHECK_FEATURE([working .subsection -1], gcc_cv_as_subsection_m1,,
2928  [conftest_label1: .word 0
2929 .subsection -1
2930 conftest_label2: .word 0
2931 .previous],
2932  [if test x$gcc_cv_nm != x; then
2933     $gcc_cv_nm conftest.o | grep conftest_label1 > conftest.nm1
2934     $gcc_cv_nm conftest.o | grep conftest_label2 | sed -e 's/label2/label1/' > conftest.nm2
2935     if cmp conftest.nm1 conftest.nm2 > /dev/null 2>&1
2936     then :
2937     else gcc_cv_as_subsection_m1=yes
2938     fi
2939     rm -f conftest.nm1 conftest.nm2
2940   fi],
2941  [AC_DEFINE(HAVE_GAS_SUBSECTION_ORDERING, 1,
2942   [Define if your assembler supports .subsection and .subsection -1 starts
2943    emitting at the beginning of your section.])])
2944
2945 gcc_GAS_CHECK_FEATURE([.weak], gcc_cv_as_weak,,
2946  [      .weak foobar],,
2947 [AC_DEFINE(HAVE_GAS_WEAK, 1, [Define if your assembler supports .weak.])])
2948
2949 gcc_GAS_CHECK_FEATURE([.weakref], gcc_cv_as_weakref,,
2950  [      .weakref foobar, barfnot],,
2951 [AC_DEFINE(HAVE_GAS_WEAKREF, 1, [Define if your assembler supports .weakref.])])
2952
2953 gcc_GAS_CHECK_FEATURE([.nsubspa comdat], gcc_cv_as_nsubspa_comdat,,
2954  [      .SPACE $TEXT$
2955         .NSUBSPA $CODE$,COMDAT],,
2956 [AC_DEFINE(HAVE_GAS_NSUBSPA_COMDAT, 1, [Define if your assembler supports .nsubspa comdat option.])])
2957
2958 # .hidden needs to be supported in both the assembler and the linker,
2959 # because GNU LD versions before 2.12.1 have buggy support for STV_HIDDEN.
2960 # This is irritatingly difficult to feature test for; we have to check the
2961 # date string after the version number.  If we've got an in-tree
2962 # ld, we don't know its patchlevel version, so we set the baseline at 2.13
2963 # to be safe.
2964 # The gcc_GAS_CHECK_FEATURE call just sets a cache variable.
2965 case "${target}" in
2966   *-*-aix*)
2967     conftest_s='        .globl foobar,hidden'
2968     ;;
2969   *)
2970     conftest_s='        .hidden foobar
2971 foobar:'
2972     ;;
2973 esac
2974 gcc_GAS_CHECK_FEATURE([.hidden], gcc_cv_as_hidden,, [$conftest_s])
2975 case "${target}" in
2976   *-*-darwin*)
2977     # Darwin as has some visibility support, though with a different syntax.
2978     gcc_cv_as_hidden=yes
2979     ;;
2980 esac
2981
2982 # gnu_indirect_function type is an extension proposed at
2983 # http://groups.google/com/group/generic-abi/files. It allows dynamic runtime
2984 # selection of function implementation
2985 AC_ARG_ENABLE(gnu-indirect-function,
2986  [AS_HELP_STRING([--enable-gnu-indirect-function],
2987                  [enable the use of the @gnu_indirect_function to glibc systems])],
2988  [case $enable_gnu_indirect_function in
2989     yes | no) ;;
2990     *) AC_MSG_ERROR(['$enable_gnu_indirect_function' is an invalid value for --enable-gnu-indirect-function.
2991 Valid choices are 'yes' and 'no'.]) ;;
2992   esac],
2993  [enable_gnu_indirect_function="$default_gnu_indirect_function"])
2994
2995 case "${target}" in
2996   riscv*-*-linux*)
2997     AC_MSG_CHECKING(linker ifunc IRELATIVE support)
2998     cat > conftest.s <<EOF
2999         .text
3000         .type   foo_resolver, @function
3001 foo_resolver:
3002         ret
3003         .size   foo_resolver, .-foo_resolver
3004
3005         .globl  foo
3006         .type   foo, %gnu_indirect_function
3007         .set    foo, foo_resolver
3008
3009         .globl  bar
3010         .type   bar, @function
3011 bar:
3012         call    foo
3013         ret
3014         .size   bar, .-bar
3015 EOF
3016     if test x$gcc_cv_as != x \
3017        && test x$gcc_cv_ld != x \
3018        && test x$gcc_cv_readelf != x \
3019        && $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1 \
3020        && $gcc_cv_ld -o conftest conftest.o > /dev/null 2>&1 \
3021        && $gcc_cv_readelf --relocs --wide conftest \
3022           | grep R_RISCV_IRELATIVE > /dev/null 2>&1; then
3023       enable_gnu_indirect_function=yes
3024     fi
3025     rm -f conftest conftest.o conftest.s
3026     AC_MSG_RESULT($enable_gnu_indirect_function)
3027     ;;
3028 esac
3029
3030 gif=`if test x$enable_gnu_indirect_function = xyes; then echo 1; else echo 0; fi`
3031 AC_DEFINE_UNQUOTED(HAVE_GNU_INDIRECT_FUNCTION, $gif,
3032 [Define if your system supports gnu indirect functions.])
3033
3034
3035 changequote(,)dnl
3036 if test $in_tree_ld != yes ; then
3037   ld_ver=`$gcc_cv_ld --version 2>/dev/null | sed 1q`
3038   if echo "$ld_ver" | grep GNU > /dev/null; then
3039     if test x"$ld_is_gold" = xyes; then
3040       # GNU gold --version looks like this:
3041       #
3042       # GNU gold (GNU Binutils 2.21.51.20110225) 1.11
3043       #
3044       # We extract the binutils version which is more familiar and specific
3045       # than the gold version.
3046       ld_vers=`echo $ld_ver | sed -n \
3047           -e 's,^[^)]*[  ]\([0-9][0-9]*\.[0-9][0-9]*[^)]*\)) .*$,\1,p'`
3048     else
3049       # GNU ld --version looks like this:
3050       #
3051       # GNU ld (GNU Binutils) 2.21.51.20110225
3052       ld_vers=`echo $ld_ver | sed -n \
3053           -e 's,^.*[     ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
3054     fi
3055     ld_date=`echo $ld_ver | sed -n 's,^.*\([2-9][0-9][0-9][0-9]\)\(-*\)\([01][0-9]\)\2\([0-3][0-9]\).*$,\1\3\4,p'`
3056     ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
3057     ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
3058     ld_vers_patch=`expr "$ld_vers" : '[0-9]*\.[0-9]*\.\([0-9]*\)'`
3059   else
3060     case "${target}" in
3061       *-*-solaris2*)
3062         # Solaris 2 ld -V output looks like this for a regular version:
3063         #
3064         # ld: Software Generation Utilities - Solaris Link Editors: 5.11-1.1699
3065         #
3066         # but test versions add stuff at the end:
3067         #
3068         # ld: Software Generation Utilities - Solaris Link Editors: 5.11-1.1701:onnv-ab196087-6931056-03/25/10
3069         #
3070         # ld and ld.so.1 are guaranteed to be updated in lockstep, so ld version
3071         # numbers can be used in ld.so.1 feature checks even if a different
3072         # linker is configured.
3073         ld_ver=`$gcc_cv_ld -V 2>&1`
3074         if echo "$ld_ver" | grep 'Solaris Link Editors' > /dev/null; then
3075           ld_vers=`echo $ld_ver | sed -n \
3076             -e 's,^.*: 5\.[0-9][0-9]*-\([0-9]\.[0-9][0-9]*\).*$,\1,p'`
3077           ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
3078           ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
3079         fi
3080         ;;
3081     esac
3082   fi
3083 fi
3084 changequote([,])dnl
3085
3086 AC_CACHE_CHECK(linker for .hidden support, gcc_cv_ld_hidden,
3087 [[if test $in_tree_ld = yes ; then
3088   gcc_cv_ld_hidden=no
3089   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 13 -o "$gcc_cv_gld_major_version" -gt 2 \
3090      && test $in_tree_ld_is_elf = yes; then
3091      gcc_cv_ld_hidden=yes
3092   fi
3093 else
3094   gcc_cv_ld_hidden=yes
3095   if test x"$ld_is_gold" = xyes; then
3096     :
3097   elif test x"$ld_is_mold" = xyes; then
3098     :
3099   elif echo "$ld_ver" | grep GNU > /dev/null; then
3100     if test 0"$ld_date" -lt 20020404; then
3101       if test -n "$ld_date"; then
3102         # If there was date string, but was earlier than 2002-04-04, fail
3103         gcc_cv_ld_hidden=no
3104       elif test -z "$ld_vers"; then
3105         # If there was no date string nor ld version number, something is wrong
3106         gcc_cv_ld_hidden=no
3107       else
3108         test -z "$ld_vers_patch" && ld_vers_patch=0
3109         if test "$ld_vers_major" -lt 2; then
3110           gcc_cv_ld_hidden=no
3111         elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 12; then
3112           gcc_cv_ld_hidden="no"
3113         elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 12 -a "$ld_vers_patch" -eq 0; then
3114           gcc_cv_ld_hidden=no
3115         fi
3116       fi
3117     fi
3118   else
3119     case "${target}" in
3120       *-*-aix[789]*)
3121         gcc_cv_ld_hidden=yes
3122         ;;
3123       *-*-darwin*)
3124         # Darwin ld has some visibility support.
3125         gcc_cv_ld_hidden=yes
3126         ;;
3127       hppa64*-*-hpux* | ia64*-*-hpux*)
3128         gcc_cv_ld_hidden=yes
3129         ;;
3130       *-*-solaris2*)
3131         # Support for .hidden in Sun ld appeared in Solaris 9 FCS, but
3132         # .symbolic was only added in Solaris 9 12/02.
3133         gcc_cv_ld_hidden=yes
3134         ;;
3135       *)
3136         gcc_cv_ld_hidden=no
3137         ;;
3138     esac
3139   fi
3140 fi]])
3141 libgcc_visibility=no
3142 AC_SUBST(libgcc_visibility)
3143 GCC_TARGET_TEMPLATE([HAVE_GAS_HIDDEN])
3144 if test $gcc_cv_as_hidden = yes && test $gcc_cv_ld_hidden = yes; then
3145   libgcc_visibility=yes
3146   AC_DEFINE(HAVE_GAS_HIDDEN, 1,
3147   [Define if your assembler and linker support .hidden.])
3148 fi
3149
3150 AC_MSG_CHECKING(linker read-only and read-write section mixing)
3151 gcc_cv_ld_ro_rw_mix=unknown
3152 if test $in_tree_ld = yes ; then
3153   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2 \
3154      && test $in_tree_ld_is_elf = yes; then
3155     gcc_cv_ld_ro_rw_mix=read-write
3156   fi
3157 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
3158   echo '.section myfoosect, "a"' > conftest1.s
3159   echo '.section myfoosect, "aw"' > conftest2.s
3160   echo '.byte 1' >> conftest2.s
3161   echo '.section myfoosect, "a"' > conftest3.s
3162   echo '.byte 0' >> conftest3.s
3163   if $gcc_cv_as -o conftest1.o conftest1.s > /dev/null 2>&1 \
3164      && $gcc_cv_as -o conftest2.o conftest2.s > /dev/null 2>&1 \
3165      && $gcc_cv_as -o conftest3.o conftest3.s > /dev/null 2>&1 \
3166      && $gcc_cv_ld -shared -o conftest1.so conftest1.o \
3167         conftest2.o conftest3.o > /dev/null 2>&1; then
3168     gcc_cv_ld_ro_rw_mix=`$gcc_cv_objdump -h conftest1.so \
3169                          | sed -e '/myfoosect/!d' -e N`
3170     if echo "$gcc_cv_ld_ro_rw_mix" | grep CONTENTS > /dev/null; then
3171       if echo "$gcc_cv_ld_ro_rw_mix" | grep READONLY > /dev/null; then
3172         gcc_cv_ld_ro_rw_mix=read-only
3173       else
3174         gcc_cv_ld_ro_rw_mix=read-write
3175       fi
3176     fi
3177   fi
3178 changequote(,)dnl
3179   rm -f conftest.* conftest[123].*
3180 changequote([,])dnl
3181 fi
3182 if test x$gcc_cv_ld_ro_rw_mix = xread-write; then
3183         AC_DEFINE(HAVE_LD_RO_RW_SECTION_MIXING, 1,
3184   [Define if your linker links a mix of read-only
3185    and read-write sections into a read-write section.])
3186 fi
3187 AC_MSG_RESULT($gcc_cv_ld_ro_rw_mix)
3188
3189 gcc_AC_INITFINI_ARRAY
3190
3191 # Check if we have .[us]leb128, and support symbol arithmetic with it.
3192 # Older versions of GAS and some non-GNU assemblers, have a bugs handling
3193 # these directives, even when they appear to accept them.
3194 gcc_GAS_CHECK_FEATURE([.sleb128 and .uleb128], gcc_cv_as_leb128,,
3195 [       .data
3196         .uleb128 L2 - L1
3197 L1:
3198         .uleb128 1280
3199         .sleb128 -1010
3200 L2:
3201         .uleb128 0x8000000000000000
3202 ],
3203 [[
3204 if test "x$gcc_cv_objdump" != x; then
3205   if $gcc_cv_objdump -s conftest.o 2>/dev/null \
3206      | grep '04800a8e 78808080 80808080 808001' >/dev/null; then
3207     gcc_cv_as_leb128=yes
3208   fi
3209 elif test "x$gcc_cv_otool" != x; then
3210   if $gcc_cv_otool -d conftest.o 2>/dev/null \
3211      | grep '04 80 0a 8e 78 80 80 80 80 80 80 80 80 80 01' >/dev/null; then
3212     gcc_cv_as_leb128=yes
3213   fi
3214 else
3215   # play safe, assume the assembler is broken.
3216   :
3217 fi
3218 ]],
3219  [AC_DEFINE(HAVE_AS_LEB128, 1,
3220    [Define if your assembler supports .sleb128 and .uleb128.])],
3221  [AC_DEFINE(HAVE_AS_LEB128, 0,
3222    [Define if your assembler supports .sleb128 and .uleb128.])])
3223
3224 # Determine if an .eh_frame section is read-only.
3225 gcc_fn_eh_frame_ro () {
3226   $gcc_cv_as $1 -o conftest.o conftest.s > /dev/null 2>&1 && \
3227     $gcc_cv_objdump -h conftest.o 2>/dev/null | \
3228     sed -e '/.eh_frame/!d' -e N | grep READONLY > /dev/null
3229 }
3230
3231 # Check if we have assembler support for unwind directives.
3232 gcc_GAS_CHECK_FEATURE([cfi directives], gcc_cv_as_cfi_directive,,
3233 [       .text
3234         .cfi_startproc
3235         .cfi_offset 0, 0
3236         .cfi_same_value 1
3237         .cfi_def_cfa 1, 2
3238         .cfi_escape 1, 2, 3, 4, 5
3239         .cfi_endproc],
3240 [case "$target" in
3241   *-*-solaris*)
3242     # If the linker used on Solaris (like Sun ld) isn't capable of merging
3243     # read-only and read-write sections, we need to make sure that the
3244     # assembler used emits read-write .eh_frame sections.
3245     if test "x$gcc_cv_ld_ro_rw_mix" = xread-write; then
3246       gcc_cv_as_cfi_directive=yes
3247     elif test "x$gcc_cv_objdump" = x; then
3248       # No objdump, err on the side of caution.
3249       gcc_cv_as_cfi_directive=no
3250     else
3251       if test x$gas = xyes; then
3252         as_32_opt="--32"
3253         as_64_opt="--64"
3254       else
3255         as_32_opt="-m32"
3256         as_64_opt="-m64"
3257       fi
3258       case "$target" in
3259         sparc*-*-solaris2.*)
3260           # On Solaris/SPARC, .eh_frame sections should always be read-write.
3261           if gcc_fn_eh_frame_ro $as_32_opt \
3262              || gcc_fn_eh_frame_ro $as_64_opt; then
3263             gcc_cv_as_cfi_directive=no
3264           else
3265             gcc_cv_as_cfi_directive=yes
3266           fi
3267           ;;
3268         i?86-*-solaris2.* | x86_64-*-solaris2.*)
3269           # On Solaris/x86, make sure that GCC and assembler agree on using
3270           # read-only .eh_frame sections for 64-bit.
3271           if gcc_fn_eh_frame_ro $as_32_opt; then
3272             gcc_cv_as_cfi_directive=no
3273           elif gcc_fn_eh_frame_ro $as_64_opt; then
3274             gcc_cv_as_cfi_directive=yes
3275           else
3276             gcc_cv_as_cfi_directive=no
3277           fi
3278           ;;
3279       esac
3280     fi
3281     ;;
3282   *-*-*)
3283     gcc_cv_as_cfi_directive=yes
3284     ;;
3285 esac])
3286 if test $gcc_cv_as_cfi_directive = yes && test x$gcc_cv_objdump != x; then
3287 gcc_GAS_CHECK_FEATURE([working cfi advance], gcc_cv_as_cfi_advance_working,,
3288 [       .text
3289         .cfi_startproc
3290         .cfi_adjust_cfa_offset 64
3291         .skip 75040, 0
3292         .cfi_adjust_cfa_offset 128
3293         .cfi_endproc],
3294 [[
3295 if $gcc_cv_objdump -Wf conftest.o 2>/dev/null \
3296     | grep 'DW_CFA_advance_loc[24]:[    ][      ]*75040[        ]' >/dev/null; then
3297    gcc_cv_as_cfi_advance_working=yes
3298 fi
3299 ]])
3300 else
3301   # no objdump, err on the side of caution
3302   gcc_cv_as_cfi_advance_working=no
3303 fi
3304 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_DIRECTIVE)
3305 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_DIRECTIVE,
3306   [`if test $gcc_cv_as_cfi_directive = yes \
3307        && test $gcc_cv_as_cfi_advance_working = yes; then echo 1; else echo 0; fi`],
3308   [Define 0/1 if your assembler supports CFI directives.])
3309
3310 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE)
3311 gcc_GAS_CHECK_FEATURE([cfi personality directive],
3312   gcc_cv_as_cfi_personality_directive,,
3313 [       .text
3314         .cfi_startproc
3315         .cfi_personality 0, symbol
3316         .cfi_endproc])
3317 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE,
3318   [`if test $gcc_cv_as_cfi_personality_directive = yes; then echo 1; else echo 0; fi`],
3319   [Define 0/1 if your assembler supports .cfi_personality.])
3320
3321 gcc_GAS_CHECK_FEATURE([cfi sections directive],
3322   gcc_cv_as_cfi_sections_directive,,
3323 [       .text
3324         .cfi_sections .debug_frame, .eh_frame
3325         .cfi_startproc
3326         .cfi_endproc],
3327 [case $target_os in
3328   win32 | pe | cygwin* | mingw32*)
3329     # Need to check that we generated the correct relocation for the
3330     # .debug_frame section.  This was fixed for binutils 2.21.
3331     gcc_cv_as_cfi_sections_directive=no
3332     if test "x$gcc_cv_objdump" != x; then
3333      if $gcc_cv_objdump -j .debug_frame -r conftest.o 2>/dev/null | \
3334         grep secrel > /dev/null; then
3335       gcc_cv_as_cfi_sections_directive=yes
3336      fi
3337     fi
3338     ;;
3339   *)
3340     gcc_cv_as_cfi_sections_directive=yes
3341     ;;
3342 esac])
3343 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_SECTIONS_DIRECTIVE)
3344 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_SECTIONS_DIRECTIVE,
3345   [`if test $gcc_cv_as_cfi_sections_directive = yes; then echo 1; else echo 0; fi`],
3346   [Define 0/1 if your assembler supports .cfi_sections.])
3347
3348 # GAS versions up to and including 2.11.0 may mis-optimize
3349 # .eh_frame data.
3350 gcc_GAS_CHECK_FEATURE(eh_frame optimization, gcc_cv_as_eh_frame,,
3351 [       .text
3352 .LFB1:
3353         .4byte  0
3354 .L1:
3355         .4byte  0
3356 .LFE1:
3357         .section        .eh_frame,"aw",@progbits
3358 __FRAME_BEGIN__:
3359         .4byte  .LECIE1-.LSCIE1
3360 .LSCIE1:
3361         .4byte  0x0
3362         .byte   0x1
3363         .ascii "z\0"
3364         .byte   0x1
3365         .byte   0x78
3366         .byte   0x1a
3367         .byte   0x0
3368         .byte   0x4
3369         .4byte  1
3370         .p2align 1
3371 .LECIE1:
3372 .LSFDE1:
3373         .4byte  .LEFDE1-.LASFDE1
3374 .LASFDE1:
3375         .4byte  .LASFDE1-__FRAME_BEGIN__
3376         .4byte  .LFB1
3377         .4byte  .LFE1-.LFB1
3378         .byte   0x4
3379         .4byte  .LFE1-.LFB1
3380         .byte   0x4
3381         .4byte  .L1-.LFB1
3382 .LEFDE1:],
3383 [  dnl # For autoconf 2.5x, must protect trailing spaces with @&t@.
3384 cat > conftest.lit <<EOF
3385  0000 10000000 00000000 017a0001 781a0004  .........z..x...
3386  0010 01000000 12000000 18000000 00000000  ................
3387  0020 08000000 04080000 0044               .........D      @&t@
3388 EOF
3389 cat > conftest.big <<EOF
3390  0000 00000010 00000000 017a0001 781a0004  .........z..x...
3391  0010 00000001 00000012 00000018 00000000  ................
3392  0020 00000008 04000000 0844               .........D      @&t@
3393 EOF
3394   # If the assembler didn't choke, and we can objdump,
3395   # and we got the correct data, then succeed.
3396   # The text in the here-document typically retains its unix-style line
3397   # endings, while the output of objdump will use host line endings.
3398   # Therefore, use diff -b for the comparisons.
3399   if test x$gcc_cv_objdump != x \
3400   && $gcc_cv_objdump -s -j .eh_frame conftest.o 2>/dev/null \
3401      | tail -3 > conftest.got \
3402   && { diff -b conftest.lit conftest.got > /dev/null 2>&1 \
3403     || diff -b conftest.big conftest.got > /dev/null 2>&1; }
3404   then
3405     gcc_cv_as_eh_frame=yes
3406   elif AC_TRY_COMMAND($gcc_cv_as -o conftest.o --traditional-format /dev/null); then
3407     gcc_cv_as_eh_frame=buggy
3408   else
3409     # Uh oh, what do we do now?
3410     gcc_cv_as_eh_frame=no
3411   fi])
3412
3413 if test $gcc_cv_as_eh_frame = buggy; then
3414   AC_DEFINE(USE_AS_TRADITIONAL_FORMAT, 1,
3415   [Define if your assembler mis-optimizes .eh_frame data.])
3416 fi
3417
3418 # Test if the assembler supports the section flag 'e' or #exclude for
3419 # specifying an excluded section.
3420 gcc_GAS_CHECK_FEATURE([section exclude flag], gcc_cv_as_section_exclude_e,
3421  [--fatal-warnings],
3422  [.section foo1,"e"
3423   .byte 0,0,0,0])
3424 if test $gcc_cv_as_section_exclude_e = no; then
3425   case "${target}" in
3426     # Solaris as uses #exclude instead.
3427     *-*-solaris2*)
3428       case "${target}" in
3429         sparc*-*-solaris2*)
3430           conftest_s='.section "foo1", #exclude'
3431           ;;
3432         i?86-*-solaris2* | x86_64-*-solaris2*)
3433           conftest_s='.section foo1, #exclude'
3434           ;;
3435       esac
3436       ;;
3437     esac
3438   gcc_GAS_CHECK_FEATURE([section exclude flag], gcc_cv_as_section_exclude_hash,,
3439     [$conftest_s
3440      .byte 0,0,0,0])
3441 fi
3442 AC_DEFINE_UNQUOTED(HAVE_GAS_SECTION_EXCLUDE,
3443   [`if test $gcc_cv_as_section_exclude_e = yes || test $gcc_cv_as_section_exclude_hash = yes; then echo 1; else echo 0; fi`],
3444 [Define if your assembler supports specifying the exclude section flag.])
3445
3446 # Test if the assembler supports the section flag 'R' for specifying
3447 # section with SHF_GNU_RETAIN.
3448 case "${target}" in
3449   # Solaris may use GNU assembler with Solairs ld.  Even if GNU
3450   # assembler supports the section flag 'R', it doesn't mean that
3451   # Solairs ld supports it.
3452   *-*-solaris2*)
3453     gcc_cv_as_shf_gnu_retain=no
3454     ;;
3455   *)
3456     gcc_GAS_CHECK_FEATURE([section 'R' flag], gcc_cv_as_shf_gnu_retain,
3457       [--fatal-warnings],
3458       [.section .foo,"awR",%progbits
3459 .byte 0])
3460     ;;
3461 esac
3462 AC_DEFINE_UNQUOTED(HAVE_GAS_SHF_GNU_RETAIN,
3463   [`if test $gcc_cv_as_shf_gnu_retain = yes; then echo 1; else echo 0; fi`],
3464   [Define 0/1 if your assembler supports marking sections with SHF_GNU_RETAIN flag.])
3465
3466 # Test if the assembler supports the section flag 'o' for specifying
3467 # section with link-order.
3468 case "${target}" in
3469   # Solaris may use GNU assembler with Solairs ld.  Even if GNU
3470   # assembler supports the section flag 'o', it doesn't mean that
3471   # Solairs ld supports it.
3472   *-*-solaris2*)
3473     gcc_cv_as_section_link_order=no
3474     ;;
3475   *)
3476     gcc_GAS_CHECK_FEATURE([section 'o' flag], gcc_cv_as_section_link_order,
3477       [--fatal-warnings],
3478       [.section .foo,"a"
3479 .byte 0
3480 .section __patchable_function_entries,"awo",%progbits,.foo
3481 .byte 0])
3482     ;;
3483 esac
3484 AC_DEFINE_UNQUOTED(HAVE_GAS_SECTION_LINK_ORDER,
3485   [`if test $gcc_cv_as_section_link_order = yes; then echo 1; else echo 0; fi`],
3486   [Define 0/1 if your assembler supports 'o' flag in .section directive.])
3487
3488 gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
3489  [--fatal-warnings],
3490  [.section .rodata.str, "aMS", @progbits, 1])
3491 if test $gcc_cv_as_shf_merge = no; then
3492   gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
3493     [--fatal-warnings],
3494     [.section .rodata.str, "aMS", %progbits, 1])
3495 fi
3496 AC_DEFINE_UNQUOTED(HAVE_GAS_SHF_MERGE,
3497   [`if test $gcc_cv_as_shf_merge = yes; then echo 1; else echo 0; fi`],
3498 [Define 0/1 if your assembler supports marking sections with SHF_MERGE flag.])
3499
3500 gcc_cv_ld_aligned_shf_merge=yes
3501 case "$target" in
3502   # SHF_MERGE support is broken in Solaris ld up to Solaris 11.3/SPARC for
3503   # alignment > 1.
3504   sparc*-*-solaris2.11*)
3505     if test x"$gnu_ld" = xno \
3506        && test "$ld_vers_major" -lt 2 && test "$ld_vers_minor" -lt 3159; then
3507       gcc_cv_ld_aligned_shf_merge=no
3508     fi
3509     ;;
3510 esac
3511 AC_DEFINE_UNQUOTED(HAVE_LD_ALIGNED_SHF_MERGE,
3512   [`if test $gcc_cv_ld_aligned_shf_merge = yes; then echo 1; else echo 0; fi`],
3513 [Define 0/1 if your linker supports the SHF_MERGE flag with section alignment > 1.])
3514
3515 gcc_GAS_CHECK_FEATURE([COMDAT group support (GNU as)],
3516  gcc_cv_as_comdat_group,
3517  [--fatal-warnings],
3518  [.section .text,"axG",@progbits,.foo,comdat])
3519 if test $gcc_cv_as_comdat_group = yes; then
3520   gcc_cv_as_comdat_group_percent=no
3521   gcc_cv_as_comdat_group_group=no
3522 else
3523  gcc_GAS_CHECK_FEATURE([COMDAT group support (GNU as, %type)],
3524    gcc_cv_as_comdat_group_percent,
3525    [--fatal-warnings],
3526    [.section .text,"axG",%progbits,.foo,comdat])
3527  if test $gcc_cv_as_comdat_group_percent = yes; then
3528    gcc_cv_as_comdat_group_group=no
3529  else
3530    case "${target}" in
3531      # Sun as uses a completely different syntax.
3532      *-*-solaris2*)
3533        case "${target}" in
3534          sparc*-*-solaris2*)
3535            conftest_s='
3536                .group foo,".text%foo",#comdat
3537                .section ".text%foo", #alloc,#execinstr,#progbits
3538                .globl foo
3539              foo:
3540              '
3541            ;;
3542          i?86-*-solaris2* | x86_64-*-solaris2*)
3543            conftest_s='
3544                .group foo,.text%foo,#comdat
3545                .section .text%foo, "ax", @progbits
3546                .globl  foo
3547              foo:
3548              '
3549            ;;
3550        esac
3551        gcc_GAS_CHECK_FEATURE([COMDAT group support (Sun as, .group)],
3552          gcc_cv_as_comdat_group_group,
3553          , [$conftest_s])
3554        ;;
3555    esac
3556    if test -z "${gcc_cv_as_comdat_group_group+set}"; then
3557      gcc_cv_as_comdat_group_group=no
3558    fi
3559  fi
3560 fi
3561 if test x"$ld_is_gold" = xyes; then
3562   comdat_group=yes
3563 elif test x"$ld_is_mold" = xyes; then
3564   comdat_group=yes
3565 elif test $in_tree_ld = yes ; then
3566   comdat_group=no
3567   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
3568      && test $in_tree_ld_is_elf = yes; then
3569      comdat_group=yes
3570   fi
3571 elif echo "$ld_ver" | grep GNU > /dev/null; then
3572   comdat_group=yes
3573   if test 0"$ld_date" -lt 20050308; then
3574     if test -n "$ld_date"; then
3575       # If there was date string, but was earlier than 2005-03-08, fail
3576       comdat_group=no
3577     elif test "$ld_vers_major" -lt 2; then
3578       comdat_group=no
3579     elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
3580       comdat_group=no
3581     fi
3582   fi
3583 else
3584 changequote(,)dnl
3585   case "${target}" in
3586     *-*-solaris2.1[1-9]*)
3587       comdat_group=no
3588       # Sun ld has COMDAT group support since Solaris 9, but it doesn't
3589       # interoperate with GNU as until Solaris 11 build 130, i.e. ld
3590       # version 1.688.
3591       #
3592       # If using Sun as for COMDAT group as emitted by GCC, one needs at
3593       # least ld version 1.2267.
3594       if test "$ld_vers_major" -gt 1; then
3595         comdat_group=yes
3596       elif test "x$gas_flag" = xyes && test "$ld_vers_minor" -ge 1688; then
3597         comdat_group=yes
3598       elif test "$ld_vers_minor" -ge 2267; then
3599         comdat_group=yes
3600       fi
3601       ;;
3602     *)
3603       # Assume linkers other than GNU ld don't support COMDAT group.
3604       comdat_group=no
3605       ;;
3606   esac
3607 changequote([,])dnl
3608 fi
3609 # Allow overriding the automatic COMDAT group tests above.
3610 AC_ARG_ENABLE(comdat,
3611   [AS_HELP_STRING([--enable-comdat], [enable COMDAT group support])],
3612   [comdat_group="$enable_comdat"])
3613 if test $comdat_group = no; then
3614   gcc_cv_as_comdat_group=no
3615   gcc_cv_as_comdat_group_percent=no
3616   gcc_cv_as_comdat_group_group=no
3617 fi
3618 AC_DEFINE_UNQUOTED(HAVE_COMDAT_GROUP,
3619   [`if test $gcc_cv_as_comdat_group = yes \
3620     || test $gcc_cv_as_comdat_group_percent = yes \
3621     || test $gcc_cv_as_comdat_group_group = yes; then echo 1; else echo 0; fi`],
3622 [Define 0/1 if your assembler and linker support COMDAT groups.])
3623
3624 # Restrict this test to Solaris/x86: other targets define this statically.
3625 case "${target}" in
3626   i?86-*-solaris2* | x86_64-*-solaris2*)
3627     AC_MSG_CHECKING(support for hidden thunks in linkonce sections)
3628     if test $in_tree_ld = yes || echo "$ld_ver" | grep GNU > /dev/null; then
3629       hidden_linkonce=yes
3630     else
3631       case "${target}" in
3632         # Full support for hidden thunks in linkonce sections only appeared in
3633         # Solaris 11/OpenSolaris.
3634         *-*-solaris2.1[[1-9]]*)
3635           hidden_linkonce=yes
3636           ;;
3637         *)
3638           hidden_linkonce=no
3639           ;;
3640       esac
3641     fi
3642     AC_MSG_RESULT($hidden_linkonce)
3643     AC_DEFINE_UNQUOTED(USE_HIDDEN_LINKONCE,
3644       [`if test $hidden_linkonce = yes; then echo 1; else echo 0; fi`],
3645     [Define 0/1 if your linker supports hidden thunks in linkonce sections.])
3646   ;;
3647 esac
3648
3649 gcc_GAS_CHECK_FEATURE([line table is_stmt support],
3650  gcc_cv_as_is_stmt,,
3651 [       .text
3652         .file 1 "conf.c"
3653         .loc 1 1 0 is_stmt 1],,
3654 [AC_DEFINE(HAVE_GAS_LOC_STMT, 1,
3655   [Define if your assembler supports the .loc is_stmt sub-directive.])])
3656
3657 gcc_GAS_CHECK_FEATURE([line table discriminator support],
3658  gcc_cv_as_discriminator,,
3659 [       .text
3660         .file 1 "conf.c"
3661         .loc 1 1 0 discriminator 1],,
3662 [AC_DEFINE(HAVE_GAS_DISCRIMINATOR, 1,
3663   [Define if your assembler supports the .loc discriminator sub-directive.])])
3664
3665 # Catch the newlib flag of the same name so we can gate GCC features on it.
3666 AC_ARG_ENABLE(newlib-nano-formatted-io,
3667 [AS_HELP_STRING([--enable-newlib-nano-formatted-io], [Use nano version
3668  formatted IO])],
3669 [case "${enableval}" in
3670   yes|no)
3671     ;;
3672   *)
3673     AC_MSG_ERROR([unknown newlib-nano-formatted-io setting $enableval])
3674     ;;
3675 esac], [])
3676
3677 # Thread-local storage - the check is heavily parameterized.
3678 conftest_s=
3679 tls_as_opt=
3680 case "$target" in
3681 changequote(,)dnl
3682   alpha*-*-*)
3683     conftest_s='
3684         .section ".tdata","awT",@progbits
3685 foo:    .long   25
3686         .text
3687         ldq     $27,__tls_get_addr($29)         !literal!1
3688         lda     $16,foo($29)                    !tlsgd!1
3689         jsr     $26,($27),__tls_get_addr        !lituse_tlsgd!1
3690         ldq     $27,__tls_get_addr($29)         !literal!2
3691         lda     $16,foo($29)                    !tlsldm!2
3692         jsr     $26,($27),__tls_get_addr        !lituse_tlsldm!2
3693         ldq     $1,foo($29)                     !gotdtprel
3694         ldah    $2,foo($29)                     !dtprelhi
3695         lda     $3,foo($2)                      !dtprello
3696         lda     $4,foo($29)                     !dtprel
3697         ldq     $1,foo($29)                     !gottprel
3698         ldah    $2,foo($29)                     !tprelhi
3699         lda     $3,foo($2)                      !tprello
3700         lda     $4,foo($29)                     !tprel'
3701         tls_as_opt=--fatal-warnings
3702         ;;
3703   arc*-*-*)
3704     conftest_s='
3705         add_s r0,r0, @foo@tpoff'
3706         ;;
3707   cris-*-*|crisv32-*-*)
3708     conftest_s='
3709         .section ".tdata","awT",@progbits
3710 x:      .long   25
3711         .text
3712         move.d x:IE,$r10
3713         nop'
3714         tls_as_opt=--fatal-warnings
3715         ;;
3716   frv*-*-*)
3717     conftest_s='
3718         .section ".tdata","awT",@progbits
3719 x:      .long   25
3720         .text
3721         call    #gettlsoff(x)'
3722         ;;
3723   hppa*-*-linux*)
3724     conftest_s='
3725 t1:     .reg    %r20
3726 t2:     .reg    %r21
3727 gp:     .reg    %r19
3728         .section ".tdata","awT",@progbits
3729 foo:    .long   25
3730         .text
3731         .align  4
3732         addil LT%foo-$tls_gdidx$,gp
3733         ldo RT%foo-$tls_gdidx$(%r1),%arg0
3734         b __tls_get_addr
3735         nop
3736         addil LT%foo-$tls_ldidx$,gp
3737         b __tls_get_addr
3738         ldo RT%foo-$tls_ldidx$(%r1),%arg0
3739         addil LR%foo-$tls_dtpoff$,%ret0
3740         ldo RR%foo-$tls_dtpoff$(%r1),%t1
3741         mfctl %cr27,%t1
3742         addil LT%foo-$tls_ieoff$,gp
3743         ldw RT%foo-$tls_ieoff$(%r1),%t2
3744         add %t1,%t2,%t3
3745         mfctl %cr27,%t1
3746         addil LR%foo-$tls_leoff$,%t1
3747         ldo RR%foo-$tls_leoff$(%r1),%t2'
3748         tls_as_opt=--fatal-warnings
3749         ;;
3750   arm*-*-*)
3751     conftest_s='
3752         .section ".tdata","awT",%progbits
3753 foo:    .long   25
3754         .text
3755 .word foo(gottpoff)
3756 .word foo(tpoff)
3757 .word foo(tlsgd)
3758 .word foo(tlsldm)
3759 .word foo(tlsldo)'
3760         ;;
3761   i[34567]86-*-* | x86_64-*-*)
3762     case "$target" in
3763       i[34567]86-*-solaris2.* | x86_64-*-solaris2.*)
3764         on_solaris=yes
3765         ;;
3766       *)
3767         on_solaris=no
3768         ;;
3769     esac
3770     if test x$on_solaris = xyes && test x$gas_flag = xno; then
3771       conftest_s='
3772         .section .tdata,"awt",@progbits'
3773       tls_section_flag=t
3774 changequote([,])dnl
3775       AC_DEFINE(TLS_SECTION_ASM_FLAG, 't',
3776 [Define to the flag used to mark TLS sections if the default (`T') doesn't work.])
3777 changequote(,)dnl
3778     else
3779       conftest_s='
3780         .section ".tdata","awT",@progbits'
3781       tls_section_flag=T
3782       tls_as_opt="--fatal-warnings"
3783     fi
3784     case "$target" in
3785       i[34567]86-*-*)
3786         if test x$on_solaris = xyes; then
3787           case $gas_flag in
3788             yes) tls_as_opt="$tls_as_opt --32" ;;
3789           esac
3790         fi
3791         conftest_s="$conftest_s
3792 foo:    .long   25
3793         .text
3794         movl    %gs:0, %eax
3795         leal    foo@tlsgd(,%ebx,1), %eax
3796         leal    foo@tlsldm(%ebx), %eax
3797         leal    foo@dtpoff(%eax), %edx
3798         movl    foo@gottpoff(%ebx), %eax
3799         subl    foo@gottpoff(%ebx), %eax
3800         addl    foo@gotntpoff(%ebx), %eax
3801         movl    foo@indntpoff, %eax
3802         movl    \$foo@tpoff, %eax
3803         subl    \$foo@tpoff, %eax
3804         leal    foo@ntpoff(%ecx), %eax"
3805         ;;
3806       x86_64-*-*)
3807         if test x$on_solaris = xyes; then
3808           case $gas_flag in
3809             yes) tls_as_opt="$tls_as_opt --64" ;;
3810             no)  tls_as_opt="$tls_as_opt -xarch=amd64" ;;
3811           esac
3812         fi
3813         conftest_s="$conftest_s
3814 foo:    .long   25
3815         .text
3816         movq    %fs:0, %rax
3817         leaq    foo@tlsgd(%rip), %rdi
3818         leaq    foo@tlsld(%rip), %rdi
3819         leaq    foo@dtpoff(%rax), %rdx
3820         movq    foo@gottpoff(%rip), %rax
3821         movq    \$foo@tpoff, %rax"
3822         ;;
3823     esac
3824     ;;
3825   ia64-*-*)
3826     conftest_s='
3827         .section ".tdata","awT",@progbits
3828 foo:    data8   25
3829         .text
3830         addl    r16 = @ltoff(@dtpmod(foo#)), gp
3831         addl    r17 = @ltoff(@dtprel(foo#)), gp
3832         addl    r18 = @ltoff(@tprel(foo#)), gp
3833         addl    r19 = @dtprel(foo#), gp
3834         adds    r21 = @dtprel(foo#), r13
3835         movl    r23 = @dtprel(foo#)
3836         addl    r20 = @tprel(foo#), gp
3837         adds    r22 = @tprel(foo#), r13
3838         movl    r24 = @tprel(foo#)'
3839         tls_as_opt=--fatal-warnings
3840         ;;
3841   loongarch*-*-*)
3842     conftest_s='
3843         .section .tdata,"awT",@progbits
3844 x:      .word 2
3845         .text
3846         la.tls.gd $a0,x
3847         bl __tls_get_addr'
3848         tls_first_major=0
3849         tls_first_minor=0
3850         tls_as_opt='--fatal-warnings'
3851         ;;
3852   microblaze*-*-*)
3853     conftest_s='
3854         .section .tdata,"awT",@progbits
3855 x:
3856         .word 2
3857         .text
3858         addik r5,r20,x@TLSGD
3859         addik r5,r20,x@TLSLDM'
3860         tls_as_opt='--fatal-warnings'
3861         ;;
3862   mips*-*-*)
3863     conftest_s='
3864         .section .tdata,"awT",@progbits
3865 x:
3866         .word 2
3867         .text
3868         addiu $4, $28, %tlsgd(x)
3869         addiu $4, $28, %tlsldm(x)
3870         lui $4, %dtprel_hi(x)
3871         addiu $4, $4, %dtprel_lo(x)
3872         lw $4, %gottprel(x)($28)
3873         lui $4, %tprel_hi(x)
3874         addiu $4, $4, %tprel_lo(x)'
3875         tls_as_opt='-32 --fatal-warnings'
3876         ;;
3877   m68k-*-*)
3878     conftest_s='
3879         .section .tdata,"awT",@progbits
3880 x:
3881         .word 2
3882         .text
3883 foo:
3884         move.l x@TLSGD(%a5),%a0
3885         move.l x@TLSLDM(%a5),%a0
3886         move.l x@TLSLDO(%a5),%a0
3887         move.l x@TLSIE(%a5),%a0
3888         move.l x@TLSLE(%a5),%a0'
3889         tls_as_opt='--fatal-warnings'
3890         ;;
3891   nios2-*-*)
3892       conftest_s='
3893         .section ".tdata","awT",@progbits'
3894         tls_as_opt="--fatal-warnings"
3895         ;;
3896   aarch64*-*-*)
3897     conftest_s='
3898         .section ".tdata","awT",%progbits
3899 foo:    .long   25
3900         .text
3901         adrp  x0, :tlsgd:x
3902         add   x0, x0, #:tlsgd_lo12:x
3903         bl    __tls_get_addr
3904         nop'
3905         tls_as_opt='--fatal-warnings'
3906         ;;
3907   or1k*-*-*)
3908     conftest_s='
3909         .section ".tdata","awT",@progbits
3910 foo:    .long   25
3911         .text
3912         l.movhi r3, tpoffha(foo)
3913         l.add   r3, r3, r10
3914         l.lwz   r4, tpofflo(foo)(r3)'
3915     tls_as_opt=--fatal-warnings
3916     ;;
3917   powerpc-ibm-aix*)
3918     conftest_s='
3919         .extern __get_tpointer
3920         .toc
3921 LC..1:
3922         .tc a[TC],a[TL]@le
3923         .csect .text[PR]
3924 .tlstest:
3925         lwz 9,LC..1(2)
3926         bla __get_tpointer
3927         lwzx 3,9,3
3928         .globl a
3929         .csect a[TL],4
3930 a:
3931         .space 4'
3932         ;;
3933   powerpc64*-*-*)
3934     conftest_s='
3935         .section ".tdata","awT",@progbits
3936         .align 3
3937 ld0:    .space 8
3938 ld1:    .space 8
3939 x1:     .space 8
3940 x2:     .space 8
3941 x3:     .space 8
3942         .text
3943         addi 3,2,ld0@got@tlsgd
3944         bl .__tls_get_addr
3945         nop
3946         addi 3,2,ld1@toc
3947         bl .__tls_get_addr
3948         nop
3949         addi 3,2,x1@got@tlsld
3950         bl .__tls_get_addr
3951         nop
3952         addi 9,3,x1@dtprel
3953         bl .__tls_get_addr
3954         nop
3955         addis 9,3,x2@dtprel@ha
3956         addi 9,9,x2@dtprel@l
3957         bl .__tls_get_addr
3958         nop
3959         ld 9,x3@got@dtprel(2)
3960         add 9,9,3
3961         bl .__tls_get_addr
3962         nop'
3963         tls_as_opt="-a64 --fatal-warnings"
3964         ;;
3965   powerpc*-*-*)
3966     conftest_s='
3967         .section ".tdata","awT",@progbits
3968         .align 2
3969 ld0:    .space 4
3970 ld1:    .space 4
3971 x1:     .space 4
3972 x2:     .space 4
3973 x3:     .space 4
3974         .text
3975         addi 3,31,ld0@got@tlsgd
3976         bl __tls_get_addr
3977         addi 3,31,x1@got@tlsld
3978         bl __tls_get_addr
3979         addi 9,3,x1@dtprel
3980         addis 9,3,x2@dtprel@ha
3981         addi 9,9,x2@dtprel@l
3982         lwz 9,x3@got@tprel(31)
3983         add 9,9,x@tls
3984         addi 9,2,x1@tprel
3985         addis 9,2,x2@tprel@ha
3986         addi 9,9,x2@tprel@l'
3987         tls_as_opt="-a32 --fatal-warnings"
3988         ;;
3989   riscv*-*-*)
3990     conftest_s='
3991         .section .tdata,"awT",@progbits
3992 x:      .word 2
3993         .text
3994         la.tls.gd a0,x
3995         call __tls_get_addr'
3996         tls_as_opt='--fatal-warnings'
3997         ;;
3998   s390-*-*)
3999     conftest_s='
4000         .section ".tdata","awT",@progbits
4001 foo:    .long   25
4002         .text
4003         .long   foo@TLSGD
4004         .long   foo@TLSLDM
4005         .long   foo@DTPOFF
4006         .long   foo@NTPOFF
4007         .long   foo@GOTNTPOFF
4008         .long   foo@INDNTPOFF
4009         l       %r1,foo@GOTNTPOFF(%r12)
4010         l       %r1,0(%r1):tls_load:foo
4011         bas     %r14,0(%r1,%r13):tls_gdcall:foo
4012         bas     %r14,0(%r1,%r13):tls_ldcall:foo'
4013         tls_as_opt="-m31 --fatal-warnings"
4014         ;;
4015   s390x-*-*)
4016     conftest_s='
4017         .section ".tdata","awT",@progbits
4018 foo:    .long   25
4019         .text
4020         .quad   foo@TLSGD
4021         .quad   foo@TLSLDM
4022         .quad   foo@DTPOFF
4023         .quad   foo@NTPOFF
4024         .quad   foo@GOTNTPOFF
4025         lg      %r1,foo@GOTNTPOFF(%r12)
4026         larl    %r1,foo@INDNTPOFF
4027         brasl   %r14,__tls_get_offset@PLT:tls_gdcall:foo
4028         brasl   %r14,__tls_get_offset@PLT:tls_ldcall:foo'
4029         tls_as_opt="-m64 -Aesame --fatal-warnings"
4030         ;;
4031   sh-*-* | sh[123456789lbe]*-*-*)
4032     conftest_s='
4033         .section ".tdata","awT",@progbits
4034 foo:    .long   25
4035         .text
4036         .long   foo@TLSGD
4037         .long   foo@TLSLDM
4038         .long   foo@DTPOFF
4039         .long   foo@GOTTPOFF
4040         .long   foo@TPOFF'
4041         tls_as_opt=--fatal-warnings
4042         ;;
4043   sparc*-*-*)
4044     case "$target" in
4045       sparc*-sun-solaris2.*)
4046         on_solaris=yes
4047         ;;
4048       *)
4049         on_solaris=no
4050         ;;
4051     esac
4052     if test x$on_solaris = xyes && test x$gas_flag = xno; then
4053       conftest_s='
4054         .section ".tdata",#alloc,#write,#tls'
4055     else
4056       conftest_s='
4057         .section ".tdata","awT",@progbits'
4058         tls_as_opt="-32 --fatal-warnings"
4059     fi
4060     conftest_s="$conftest_s
4061 foo:    .long   25
4062         .text
4063         sethi   %tgd_hi22(foo), %o0
4064         add     %o0, %tgd_lo10(foo), %o1
4065         add     %l7, %o1, %o0, %tgd_add(foo)
4066         call    __tls_get_addr, %tgd_call(foo)
4067         sethi   %tldm_hi22(foo), %l1
4068         add     %l1, %tldm_lo10(foo), %l2
4069         add     %l7, %l2, %o0, %tldm_add(foo)
4070         call    __tls_get_addr, %tldm_call(foo)
4071         sethi   %tldo_hix22(foo), %l3
4072         xor     %l3, %tldo_lox10(foo), %l4
4073         add     %o0, %l4, %l5, %tldo_add(foo)
4074         sethi   %tie_hi22(foo), %o3
4075         add     %o3, %tie_lo10(foo), %o3
4076         ld      [%l7 + %o3], %o2, %tie_ld(foo)
4077         add     %g7, %o2, %o4, %tie_add(foo)
4078         sethi   %tle_hix22(foo), %l1
4079         xor     %l1, %tle_lox10(foo), %o5
4080         ld      [%g7 + %o5], %o1"
4081         ;;
4082   xtensa*-*-*)
4083     conftest_s='
4084         .section ".tdata","awT",@progbits
4085 foo:    .long   25
4086         .text
4087         movi    a8, foo@TLSFUNC
4088         movi    a10, foo@TLSARG
4089         callx8.tls a8, foo@TLSCALL'
4090         ;;
4091 changequote([,])dnl
4092 esac
4093 set_have_as_tls=no
4094 if test "x$enable_tls" = xno ; then
4095   : # TLS explicitly disabled.
4096 elif test "x$enable_tls" = xyes ; then
4097   set_have_as_tls=yes # TLS explicitly enabled.
4098 elif test -z "$conftest_s"; then
4099   : # If we don't have a check, assume no support.
4100 else
4101   gcc_GAS_CHECK_FEATURE(thread-local storage support, gcc_cv_as_tls,
4102   [$tls_as_opt], [$conftest_s],,
4103   [set_have_as_tls=yes])
4104 fi
4105 if test $set_have_as_tls = yes ; then
4106   AC_DEFINE(HAVE_AS_TLS, 1,
4107             [Define if your assembler and linker support thread-local storage.])
4108 fi
4109
4110 # Target-specific assembler checks.
4111
4112 AC_MSG_CHECKING(linker -Bstatic/-Bdynamic option)
4113 gcc_cv_ld_static_dynamic=no
4114 gcc_cv_ld_static_option='-Bstatic'
4115 gcc_cv_ld_dynamic_option='-Bdynamic'
4116 if test $in_tree_ld = yes ; then
4117   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2; then
4118     gcc_cv_ld_static_dynamic=yes
4119   fi
4120 elif test x$gcc_cv_ld != x; then
4121   # Check if linker supports -Bstatic/-Bdynamic option
4122   if $gcc_cv_ld --help 2>&1 | grep -- -Bstatic > /dev/null \
4123      && $gcc_cv_ld --help 2>&1 | grep -- -Bdynamic > /dev/null; then
4124       gcc_cv_ld_static_dynamic=yes
4125   else
4126     case "$target" in
4127       # AIX ld uses -b flags
4128       *-*-aix4.[[23]]* | *-*-aix[[5-9]]*)
4129         gcc_cv_ld_static_dynamic=yes
4130         gcc_cv_ld_static_option="-bstatic"
4131         gcc_cv_ld_dynamic_option="-bdynamic"
4132         ;;
4133       # HP-UX ld uses -a flags to select between shared and archive.
4134       *-*-hpux*)
4135         if test x"$gnu_ld" = xno; then
4136           gcc_cv_ld_static_dynamic=yes
4137           gcc_cv_ld_static_option="-aarchive_shared"
4138           gcc_cv_ld_dynamic_option="-adefault"
4139         fi
4140         ;;
4141       # Solaris 2 ld always supports -Bstatic/-Bdynamic.
4142       *-*-solaris2*)
4143         gcc_cv_ld_static_dynamic=yes
4144         ;;
4145     esac
4146   fi
4147 fi
4148 if test x"$gcc_cv_ld_static_dynamic" = xyes; then
4149         AC_DEFINE(HAVE_LD_STATIC_DYNAMIC, 1,
4150 [Define if your linker supports -Bstatic/-Bdynamic or equivalent options.])
4151         AC_DEFINE_UNQUOTED(LD_STATIC_OPTION, "$gcc_cv_ld_static_option",
4152 [Define to the linker option to disable use of shared objects.])
4153         AC_DEFINE_UNQUOTED(LD_DYNAMIC_OPTION, "$gcc_cv_ld_dynamic_option",
4154 [Define to the linker option to enable use of shared objects.])
4155 fi
4156 AC_MSG_RESULT($gcc_cv_ld_static_dynamic)
4157
4158 AC_MSG_CHECKING(linker --version-script option)
4159 gcc_cv_ld_version_script=no
4160 ld_version_script_option=''
4161 if test $in_tree_ld = yes || test x"$gnu_ld" = xyes; then
4162   gcc_cv_ld_version_script=yes
4163   ld_version_script_option='--version-script'
4164 elif test x$gcc_cv_ld != x; then
4165   case "$target" in
4166     # Solaris 2 ld always supports -M.  It also supports a subset of
4167     # --version-script since Solaris 11.4, but requires
4168     # -z gnu-version-script-compat to activate.
4169     *-*-solaris2*)
4170       gcc_cv_ld_version_script=yes
4171       ld_version_script_option='-M'
4172       ;;
4173   esac
4174 fi
4175 # Don't AC_DEFINE result, only used in jit/Make-lang.in so far.
4176 AC_MSG_RESULT($gcc_cv_ld_version_script)
4177 AC_SUBST(ld_version_script_option)
4178
4179 AC_MSG_CHECKING(linker soname option)
4180 gcc_cv_ld_soname=no
4181 if test $in_tree_ld = yes || test x"$gnu_ld" = xyes; then
4182   gcc_cv_ld_soname=yes
4183   ld_soname_option='-soname'
4184 elif test x$gcc_cv_ld != x; then
4185   case "$target" in
4186     *-*-darwin*)
4187       gcc_cv_ld_soname=yes
4188       ld_soname_option='-install_name'
4189       ;;
4190     # Solaris 2 ld always supports -h.  It also supports --soname for GNU
4191     # ld compatiblity since some Solaris 10 update.
4192     *-*-solaris2*)
4193       gcc_cv_ld_soname=yes
4194       ld_soname_option='-h'
4195       ;;
4196   esac
4197 fi
4198 # Don't AC_DEFINE result, only used in jit/Make-lang.in so far.
4199 AC_MSG_RESULT($gcc_cv_ld_soname)
4200 AC_SUBST(ld_soname_option)
4201
4202 if test x"$demangler_in_ld" = xyes; then
4203   AC_MSG_CHECKING(linker --demangle support)
4204   gcc_cv_ld_demangle=no
4205   if test $in_tree_ld = yes; then
4206     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 14 -o "$gcc_cv_gld_major_version" -gt 2; then \
4207       gcc_cv_ld_demangle=yes
4208     fi
4209   elif test x$gcc_cv_ld != x -a x"$gnu_ld" = xyes; then
4210     # Check if the GNU linker supports --demangle option
4211     if $gcc_cv_ld --help 2>&1 | grep no-demangle > /dev/null; then
4212       gcc_cv_ld_demangle=yes
4213     fi
4214   fi
4215   if test x"$gcc_cv_ld_demangle" = xyes; then
4216     AC_DEFINE(HAVE_LD_DEMANGLE, 1,
4217 [Define if your linker supports --demangle option.])
4218   fi
4219   AC_MSG_RESULT($gcc_cv_ld_demangle)
4220 fi
4221
4222 AC_MSG_CHECKING(linker plugin support)
4223 gcc_cv_lto_plugin=0
4224 if test -f liblto_plugin.la; then
4225   save_ld_ver="$ld_ver"
4226   save_ld_vers_major="$ld_vers_major"
4227   save_ld_vers_minor="$ld_vers_minor"
4228   save_ld_is_gold="$ld_is_gold"
4229
4230   ld_is_gold=no
4231
4232   if test $in_tree_ld = yes -a x"$ORIGINAL_PLUGIN_LD_FOR_TARGET" = x"$gcc_cv_ld"; then
4233     ld_ver="GNU ld"
4234     # FIXME: ld_is_gold?
4235     ld_vers_major="$gcc_cv_gld_major_version"
4236     ld_vers_minor="$gcc_cv_gld_minor_version"
4237   else
4238     # Determine plugin linker version.
4239     # FIXME: Partial duplicate from above, generalize.
4240 changequote(,)dnl
4241     ld_ver=`$ORIGINAL_PLUGIN_LD_FOR_TARGET --version 2>/dev/null | sed 1q`
4242     if echo "$ld_ver" | grep GNU > /dev/null; then
4243       if echo "$ld_ver" | grep "GNU gold" > /dev/null; then
4244         ld_is_gold=yes
4245         ld_vers=`echo $ld_ver | sed -n \
4246             -e 's,^[^)]*[        ]\([0-9][0-9]*\.[0-9][0-9]*[^)]*\)) .*$,\1,p'`
4247       else
4248         ld_vers=`echo $ld_ver | sed -n \
4249             -e 's,^.*[   ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
4250       fi
4251       ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
4252       ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
4253     fi
4254 changequote([,])dnl
4255   fi
4256
4257   # Determine plugin support.
4258   if echo "$ld_ver" | grep GNU > /dev/null; then
4259     # Require GNU ld or gold 2.21+ for plugin support by default.
4260     if test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -ge 21; then
4261       gcc_cv_lto_plugin=2
4262     elif test "$ld_is_mold" = yes; then
4263       gcc_cv_lto_plugin=2
4264     # Allow -fuse-linker-plugin to enable plugin support in GNU gold 2.20.
4265     elif test "$ld_is_gold" = yes -a "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 20; then
4266       gcc_cv_lto_plugin=1
4267     fi
4268   fi
4269
4270   ld_ver="$save_ld_ver"
4271   ld_vers_major="$save_ld_vers_major"
4272   ld_vers_minor="$save_ld_vers_minor"
4273   ld_is_gold="$save_ld_is_gold"
4274 fi
4275 AC_DEFINE_UNQUOTED(HAVE_LTO_PLUGIN, $gcc_cv_lto_plugin,
4276   [Define to the level of your linker's plugin support.])
4277 AC_MSG_RESULT($gcc_cv_lto_plugin)
4278
4279 # Target OS-specific assembler checks.
4280
4281 case "$target_os" in
4282   darwin*)
4283     gcc_GAS_CHECK_FEATURE([-mmacosx-version-min option],
4284       gcc_cv_as_mmacosx_version_min,
4285       [-mmacosx-version-min=10.1], [.text],,
4286       [AC_DEFINE(HAVE_AS_MMACOSX_VERSION_MIN_OPTION, 1,
4287         [Define if your Mac OS X assembler supports the -mmacos-version-min option.])])
4288     ;;
4289 esac
4290
4291 # Target CPU-specific assembler checks.
4292
4293 case "$target" in
4294   aarch64*-*-*)
4295     gcc_GAS_CHECK_FEATURE([-mabi option], gcc_cv_as_aarch64_mabi,
4296                           [-mabi=lp64], [.text],,,)
4297     if test x$gcc_cv_as_aarch64_mabi = xyes; then
4298       AC_DEFINE(HAVE_AS_MABI_OPTION, 1,
4299                 [Define if your assembler supports the -mabi option.])
4300     else
4301       if test x$with_abi = xilp32; then
4302         AC_MSG_ERROR([Assembler does not support -mabi=ilp32.\
4303                      Upgrade the Assembler.])
4304       fi
4305       if test x"$with_multilib_list" = xdefault; then
4306         TM_MULTILIB_CONFIG=lp64
4307       else
4308         aarch64_multilibs=`echo $with_multilib_list | sed -e 's/,/ /g'`
4309         for aarch64_multilib in ${aarch64_multilibs}; do
4310           case ${aarch64_multilib} in
4311             ilp32)
4312               AC_MSG_ERROR([Assembler does not support -mabi=ilp32.\
4313                             Upgrade the Assembler.])
4314               ;;
4315             *)
4316               ;;
4317           esac
4318         done
4319       fi
4320     fi
4321     # Check if we have binutils support for relocations types needed by -fpic
4322     gcc_GAS_CHECK_FEATURE([-fpic relocs], gcc_cv_as_aarch64_picreloc,,
4323     [
4324         .text
4325         ldr     x0, [[x2, #:gotpage_lo15:globalsym]]
4326     ],,[AC_DEFINE(HAVE_AS_SMALL_PIC_RELOCS, 1,
4327         [Define if your assembler supports relocs needed by -fpic.])])
4328     # Enable Branch Target Identification Mechanism and Return Address
4329     # Signing by default.
4330     AC_ARG_ENABLE(standard-branch-protection,
4331     [
4332 AS_HELP_STRING([--enable-standard-branch-protection],
4333         [enable Branch Target Identification Mechanism and Return Address Signing by default for AArch64])
4334 AS_HELP_STRING([--disable-standard-branch-protection],
4335         [disable Branch Target Identification Mechanism and Return Address Signing by default for AArch64])
4336     ],
4337       [
4338         case $enableval in
4339           yes)
4340             tm_defines="${tm_defines} TARGET_ENABLE_BTI=1 TARGET_ENABLE_PAC_RET=1"
4341             ;;
4342           no)
4343             ;;
4344           *)
4345             AC_MSG_ERROR(['$enableval' is an invalid value for --enable-standard-branch-protection.\
4346   Valid choices are 'yes' and 'no'.])
4347             ;;
4348         esac
4349       ],
4350     [])
4351     # Enable default workaround for AArch64 Cortex-A53 erratum 835769.
4352     AC_ARG_ENABLE(fix-cortex-a53-835769,
4353     [
4354 AS_HELP_STRING([--enable-fix-cortex-a53-835769],
4355         [enable workaround for AArch64 Cortex-A53 erratum 835769 by default])
4356 AS_HELP_STRING([--disable-fix-cortex-a53-835769],
4357         [disable workaround for AArch64 Cortex-A53 erratum 835769 by default])
4358     ],
4359       [
4360         case $enableval in
4361           yes)
4362             tm_defines="${tm_defines} TARGET_FIX_ERR_A53_835769_DEFAULT=1"
4363             ;;
4364           no)
4365             ;;
4366           *)
4367             AC_MSG_ERROR(['$enableval' is an invalid value for --enable-fix-cortex-a53-835769.\
4368   Valid choices are 'yes' and 'no'.])
4369             ;;
4370
4371         esac
4372       ],
4373     [])
4374     # Enable default workaround for AArch64 Cortex-A53 erratum 843419.
4375     AC_ARG_ENABLE(fix-cortex-a53-843419,
4376     [
4377 AS_HELP_STRING([--enable-fix-cortex-a53-843419],
4378         [enable workaround for AArch64 Cortex-A53 erratum 843419 by default])
4379 AS_HELP_STRING([--disable-fix-cortex-a53-843419],
4380         [disable workaround for AArch64 Cortex-A53 erratum 843419 by default])
4381     ],
4382       [
4383         case $enableval in
4384           yes)
4385             tm_defines="${tm_defines} TARGET_FIX_ERR_A53_843419_DEFAULT=1"
4386             ;;
4387           no)
4388             ;;
4389           *)
4390             AC_MSG_ERROR(['$enableval' is an invalid value for --enable-fix-cortex-a53-843419.\
4391   Valid choices are 'yes' and 'no'.])
4392             ;;
4393
4394         esac
4395       ],
4396     [])
4397     ;;
4398
4399   # All TARGET_ABI_OSF targets.
4400   alpha*-*-linux* | alpha*-*-*bsd*)
4401     gcc_GAS_CHECK_FEATURE([explicit relocation support],
4402         gcc_cv_as_alpha_explicit_relocs,,
4403 [       .set nomacro
4404         .text
4405         extbl   $3, $2, $3      !lituse_bytoff!1
4406         ldq     $2, a($29)      !literal!1
4407         ldq     $4, b($29)      !literal!2
4408         ldq_u   $3, 0($2)       !lituse_base!1
4409         ldq     $27, f($29)     !literal!5
4410         jsr     $26, ($27), f   !lituse_jsr!5
4411         ldah    $29, 0($26)     !gpdisp!3
4412         lda     $0, c($29)      !gprel
4413         ldah    $1, d($29)      !gprelhigh
4414         lda     $1, d($1)       !gprellow
4415         lda     $29, 0($29)     !gpdisp!3],,
4416     [AC_DEFINE(HAVE_AS_EXPLICIT_RELOCS, 1,
4417   [Define if your assembler supports explicit relocations.])])
4418     gcc_GAS_CHECK_FEATURE([jsrdirect relocation support],
4419         gcc_cv_as_alpha_jsrdirect_relocs,,
4420 [       .set nomacro
4421         .text
4422         ldq     $27, a($29)     !literal!1
4423         jsr     $26, ($27), a   !lituse_jsrdirect!1],,
4424     [AC_DEFINE(HAVE_AS_JSRDIRECT_RELOCS, 1,
4425   [Define if your assembler supports the lituse_jsrdirect relocation.])])
4426     ;;
4427
4428   avr-*-*)
4429     gcc_GAS_CHECK_FEATURE([--mlink-relax option], gcc_cv_as_avr_mlink_relax,
4430       [--mlink-relax], [.text],,
4431       [AC_DEFINE(HAVE_AS_AVR_MLINK_RELAX_OPTION, 1,
4432                 [Define if your avr assembler supports --mlink-relax option.])])
4433
4434     gcc_GAS_CHECK_FEATURE([-mrmw option], gcc_cv_as_avr_mrmw,
4435       [-mrmw], [.text],,
4436       [AC_DEFINE(HAVE_AS_AVR_MRMW_OPTION, 1,
4437                 [Define if your avr assembler supports -mrmw option.])])
4438
4439     gcc_GAS_CHECK_FEATURE([__gcc_isr pseudo instruction],
4440       gcc_cv_as_avr_mgccisr,
4441       [-mgcc-isr], [.text
4442                     __gcc_isr 1
4443                     __gcc_isr 2
4444                     __gcc_isr 0,r24
4445                    ],,
4446       [AC_DEFINE(HAVE_AS_AVR_MGCCISR_OPTION, 1,
4447                 [Define if your avr assembler supports -mgcc-isr option.])])
4448
4449     # Check how default linker description file implements .rodata for
4450     # avrxmega3 (PR21472).  avr-gcc assumes .rodata is *not* loaded to
4451     # RAM so avr-gcc skips __do_copy_data for .rodata objects.
4452     AC_MSG_CHECKING(binutils for avrxmega3 .rodata support)
4453     cat > conftest.s <<EOF
4454         .section .rodata,"a",@progbits
4455         .global xxvaryy
4456     ;; avr-nm should print "... R xxvaryy", not "... D xxvaryy".
4457     xxvaryy:
4458         .word 1
4459 EOF
4460     rm -f conftest.nm
4461     AC_TRY_COMMAND([$gcc_cv_as -mmcu=avrxmega3 conftest.s -o conftest.o])
4462     AC_TRY_COMMAND([$gcc_cv_ld -mavrxmega3 conftest.o -o conftest.elf])
4463     AC_TRY_COMMAND([$gcc_cv_nm conftest.elf > conftest.nm])
4464     if test -s conftest.nm
4465     then
4466         if grep ' R xxvaryy' conftest.nm > /dev/null; then
4467             AC_MSG_RESULT(yes)
4468             AC_DEFINE(HAVE_LD_AVR_AVRXMEGA3_RODATA_IN_FLASH, 1,
4469                 [Define if your default avr linker script for avrxmega3 leaves .rodata in flash.])
4470         else
4471             AC_MSG_RESULT(no: avrxmega3 .rodata located in RAM)
4472             echo "$as_me: nm output was" >&AS_MESSAGE_LOG_FD
4473             cat conftest.nm >&AS_MESSAGE_LOG_FD
4474             avr_ld_ver="`$gcc_cv_ld -v | sed -e 's:^.* ::'`"
4475             AC_MSG_WARN([[support for avrxmega3 .rodata in flash needs Binutils 2.29 or higher (have $avr_ld_ver)]])
4476         fi
4477     else
4478         AC_MSG_RESULT(test failed)
4479         echo "$as_me: failed program was" >&AS_MESSAGE_LOG_FD
4480         cat conftest.s >&AS_MESSAGE_LOG_FD
4481         AC_MSG_WARN([[see `config.log' for details]])
4482     fi
4483     rm -f conftest.s conftest.o conftest.elf conftest.nm
4484     ;;
4485
4486   cris-*-*)
4487     gcc_GAS_CHECK_FEATURE([-no-mul-bug-abort option],
4488       gcc_cv_as_cris_no_mul_bug,
4489       [-no-mul-bug-abort], [.text],,
4490       [AC_DEFINE(HAVE_AS_NO_MUL_BUG_ABORT_OPTION, 1,
4491                 [Define if your assembler supports the -no-mul-bug-abort option.])])
4492     ;;
4493
4494   sparc*-*-*)
4495     gcc_GAS_CHECK_FEATURE([-relax option], gcc_cv_as_sparc_relax,
4496       [-relax], [.text],,
4497       [AC_DEFINE(HAVE_AS_RELAX_OPTION, 1,
4498                 [Define if your assembler supports -relax option.])])
4499
4500     gcc_GAS_CHECK_FEATURE([GOTDATA_OP relocs],
4501       gcc_cv_as_sparc_gotdata_op,
4502       [-K PIC],
4503 [.text
4504 .align 4
4505 foo:
4506         nop
4507 bar:
4508         sethi %gdop_hix22(foo), %g1
4509         xor    %g1, %gdop_lox10(foo), %g1
4510         ld    [[%l7 + %g1]], %g2, %gdop(foo)],
4511       [if test x$gcc_cv_ld != x \
4512        && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
4513          if test x$gcc_cv_objdump != x; then
4514            if $gcc_cv_objdump -s -j .text conftest 2> /dev/null \
4515               | grep ' 03000004 82186004 c405c001'> /dev/null 2>&1; then
4516                gcc_cv_as_sparc_gotdata_op=no
4517            else
4518                gcc_cv_as_sparc_gotdata_op=yes
4519            fi
4520          fi
4521        fi
4522        rm -f conftest],
4523       [AC_DEFINE(HAVE_AS_SPARC_GOTDATA_OP, 1,
4524                 [Define if your assembler and linker support GOTDATA_OP relocs.])])
4525
4526     gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs],
4527       gcc_cv_as_sparc_ua_pcrel,
4528       [-K PIC],
4529 [.text
4530 foo:
4531         nop
4532 .data
4533 .align 4
4534 .byte 0
4535 .uaword %r_disp32(foo)],
4536       [if test x$gcc_cv_ld != x \
4537        && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
4538          gcc_cv_as_sparc_ua_pcrel=yes
4539        fi
4540        rm -f conftest],
4541       [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
4542                 [Define if your assembler and linker support unaligned PC relative relocs.])
4543
4544       gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs against hidden symbols],
4545         gcc_cv_as_sparc_ua_pcrel_hidden,
4546         [-K PIC],
4547 [.data
4548 .align 4
4549 .byte 0x31
4550 .uaword %r_disp32(foo)
4551 .byte 0x32, 0x33, 0x34
4552 .global foo
4553 .hidden foo
4554 foo:
4555 .skip 4],
4556         [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
4557          && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1 \
4558          && $gcc_cv_objdump -s -j .data conftest 2> /dev/null \
4559             | grep ' 31000000 07323334' > /dev/null 2>&1; then
4560             if $gcc_cv_objdump -R conftest 2> /dev/null \
4561                | grep 'DISP32' > /dev/null 2>&1; then
4562                 :
4563             else
4564                 gcc_cv_as_sparc_ua_pcrel_hidden=yes
4565             fi
4566          fi
4567          rm -f conftest],
4568          [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL_HIDDEN, 1,
4569                    [Define if your assembler and linker support unaligned PC relative relocs against hidden symbols.])])
4570     ]) # unaligned pcrel relocs
4571
4572     gcc_GAS_CHECK_FEATURE([offsetable %lo()],
4573       gcc_cv_as_sparc_offsetable_lo10,
4574       [-xarch=v9],
4575 [.text
4576         or %g1, %lo(ab) + 12, %g1
4577         or %g1, %lo(ab + 12), %g1],
4578       [if test x$gcc_cv_objdump != x \
4579        && $gcc_cv_objdump -s -j .text conftest.o 2> /dev/null \
4580           | grep ' 82106000 82106000' > /dev/null 2>&1; then
4581          gcc_cv_as_sparc_offsetable_lo10=yes
4582        fi],
4583        [AC_DEFINE(HAVE_AS_OFFSETABLE_LO10, 1,
4584                  [Define if your assembler supports offsetable %lo().])])
4585
4586     gcc_GAS_CHECK_FEATURE([FMAF, HPC, and VIS 3.0 instructions],
4587       gcc_cv_as_sparc_fmaf,
4588       [-xarch=v9d],
4589       [.text
4590        .register %g2, #scratch
4591        .register %g3, #scratch
4592        .align 4
4593        fmaddd %f0, %f2, %f4, %f6
4594        addxccc %g1, %g2, %g3
4595        fsrl32 %f2, %f4, %f8
4596        fnaddd %f10, %f12, %f14],,
4597       [AC_DEFINE(HAVE_AS_FMAF_HPC_VIS3, 1,
4598                 [Define if your assembler supports FMAF, HPC, and VIS 3.0 instructions.])])
4599
4600     gcc_GAS_CHECK_FEATURE([SPARC4 instructions],
4601       gcc_cv_as_sparc_sparc4,
4602       [-xarch=sparc4],
4603       [.text
4604        .register %g2, #scratch
4605        .register %g3, #scratch
4606        .align 4
4607        cxbe %g2, %g3, 1f
4608 1:     cwbneg %g2, %g3, 1f
4609 1:     sha1
4610        md5
4611        aes_kexpand0 %f4, %f6, %f8
4612        des_round %f38, %f40, %f42, %f44
4613        camellia_f %f54, %f56, %f58, %f60
4614        kasumi_fi_xor %f46, %f48, %f50, %f52],,
4615       [AC_DEFINE(HAVE_AS_SPARC4, 1,
4616                 [Define if your assembler supports SPARC4 instructions.])])
4617
4618     gcc_GAS_CHECK_FEATURE([SPARC5 and VIS 4.0 instructions],
4619       gcc_cv_as_sparc_sparc5,
4620       [-xarch=sparc5],
4621       [.text
4622        .register %g2, #scratch
4623        .register %g3, #scratch
4624        .align 4
4625        subxc %g1, %g2, %g3
4626        fpadd8 %f0, %f2, %f4],,
4627       [AC_DEFINE(HAVE_AS_SPARC5_VIS4, 1,
4628                 [Define if your assembler supports SPARC5 and VIS 4.0 instructions.])])
4629
4630     gcc_GAS_CHECK_FEATURE([SPARC6 instructions],
4631       gcc_cv_as_sparc_sparc6,
4632       [-xarch=sparc6],
4633       [.text
4634        .register %g2, #scratch
4635        .register %g3, #scratch
4636        .align 4
4637        rd %entropy, %g1
4638        fpsll64x %f0, %f2, %f4],,
4639       [AC_DEFINE(HAVE_AS_SPARC6, 1,
4640                 [Define if your assembler supports SPARC6 instructions.])])
4641
4642     gcc_GAS_CHECK_FEATURE([LEON instructions],
4643       gcc_cv_as_sparc_leon,
4644       [-Aleon],
4645       [.text
4646        .register %g2, #scratch
4647        .register %g3, #scratch
4648        .align 4
4649        smac %g2, %g3, %g1
4650        umac %g2, %g3, %g1
4651        casa [[%g2]] 0xb, %g3, %g1],,
4652       [AC_DEFINE(HAVE_AS_LEON, 1,
4653                 [Define if your assembler supports LEON instructions.])])
4654     ;;
4655
4656 changequote(,)dnl
4657   i[34567]86-*-* | x86_64-*-*)
4658 changequote([,])dnl
4659     case $target_os in
4660       cygwin*)
4661         # Full C++ conformance when using a shared libstdc++-v3 requires some
4662         # support from the Cygwin DLL, which in more recent versions exports
4663         # wrappers to aid in interposing and redirecting operators new, delete,
4664         # etc., as per n2800 #17.6.4.6 [replacement.functions].  Check if we
4665         # are configuring for a version of Cygwin that exports the wrappers.
4666         if test x$host = x$target && test x$host_cpu = xi686; then
4667           AC_CHECK_FUNC([__wrap__Znaj],[gcc_ac_cygwin_dll_wrappers=yes],[gcc_ac_cygwin_dll_wrappers=no])
4668         else
4669           # Can't check presence of libc functions during cross-compile, so
4670           # we just have to assume we're building for an up-to-date target.
4671           gcc_ac_cygwin_dll_wrappers=yes
4672         fi
4673         AC_DEFINE_UNQUOTED(USE_CYGWIN_LIBSTDCXX_WRAPPERS,
4674           [`if test $gcc_ac_cygwin_dll_wrappers = yes; then echo 1; else echo 0; fi`],
4675           [Define if you want to generate code by default that assumes that the
4676            Cygwin DLL exports wrappers to support libstdc++ function replacement.])
4677     esac
4678     case $target_os in
4679       cygwin* | pe | mingw32*)
4680         # Recent binutils allows the three-operand form of ".comm" on PE.  This
4681         # definition is used unconditionally to initialise the default state of
4682         # the target option variable that governs usage of the feature.
4683         gcc_GAS_CHECK_FEATURE([.comm with alignment], gcc_cv_as_comm_has_align,,
4684           [.comm foo,1,32])
4685         AC_DEFINE_UNQUOTED(HAVE_GAS_ALIGNED_COMM,
4686           [`if test $gcc_cv_as_comm_has_align = yes; then echo 1; else echo 0; fi`],
4687           [Define if your assembler supports specifying the alignment
4688            of objects allocated using the GAS .comm command.])
4689         # Used for DWARF 2 in PE
4690         gcc_GAS_CHECK_FEATURE([.secrel32 relocs],
4691           gcc_cv_as_ix86_pe_secrel32,,
4692 [.text
4693 foo:    nop
4694 .data
4695         .secrel32 foo],
4696           [if test x$gcc_cv_ld != x \
4697            && $gcc_cv_ld -o conftest conftest.o > /dev/null 2>&1; then
4698              gcc_cv_as_ix86_pe_secrel32=yes
4699            fi
4700            rm -f conftest],
4701           [AC_DEFINE(HAVE_GAS_PE_SECREL32_RELOC, 1,
4702             [Define if your assembler and linker support 32-bit section relative relocs via '.secrel32 label'.])])
4703         # Test if the assembler supports the extended form of the .section
4704         # directive that specifies section alignment.  LTO support uses this,
4705         # but normally only after installation, so we warn but don't fail the
4706         # configure if LTO is enabled but the assembler does not support it.
4707         gcc_GAS_CHECK_FEATURE([.section with alignment], gcc_cv_as_section_has_align,
4708           -fatal-warnings,[.section lto_test,"dr0"])
4709         if test x$gcc_cv_as_section_has_align != xyes; then
4710           case ",$enable_languages," in
4711             *,lto,*)
4712               AC_MSG_WARN([LTO for $target requires binutils >= 2.20.1, but version found appears insufficient; LTO will not work until binutils is upgraded.])
4713               ;;
4714           esac
4715         fi
4716         ;;
4717     esac
4718     case $target_os in
4719        darwin2* | darwin19*)
4720         gcc_GAS_CHECK_FEATURE([llvm assembler x86-pad-for-align option],
4721           gcc_cv_as_mllvm_x86_pad_for_align,
4722           [-mllvm -x86-pad-for-align=false], [.text],,
4723           [AC_DEFINE(HAVE_AS_MLLVM_X86_PAD_FOR_ALIGN, 1,
4724             [Define if your Mac OS X assembler supports -mllvm -x86-pad-for-align=false.])])
4725        ;;
4726     esac
4727
4728     gcc_GAS_CHECK_FEATURE([-xbrace_comment], gcc_cv_as_ix86_xbrace_comment,
4729       [-xbrace_comment=no], [.text],,
4730       [AC_DEFINE(HAVE_AS_XBRACE_COMMENT_OPTION, 1,
4731                 [Define if your assembler supports -xbrace_comment option.])])
4732
4733     gcc_GAS_CHECK_FEATURE([filds and fists mnemonics],
4734        gcc_cv_as_ix86_filds,,
4735        [filds (%ebp); fists (%ebp)],,
4736        [AC_DEFINE(HAVE_AS_IX86_FILDS, 1,
4737          [Define if your assembler uses filds and fists mnemonics.])])
4738
4739     gcc_GAS_CHECK_FEATURE([fildq and fistpq mnemonics],
4740        gcc_cv_as_ix86_fildq,,
4741        [fildq (%ebp); fistpq (%ebp)],,
4742        [AC_DEFINE(HAVE_AS_IX86_FILDQ, 1,
4743          [Define if your assembler uses fildq and fistq mnemonics.])])
4744
4745     gcc_GAS_CHECK_FEATURE([cmov syntax],
4746       gcc_cv_as_ix86_cmov_sun_syntax,,
4747       [cmovl.l %edx, %eax],,
4748       [AC_DEFINE(HAVE_AS_IX86_CMOV_SUN_SYNTAX, 1,
4749         [Define if your assembler supports the Sun syntax for cmov.])])
4750
4751     gcc_GAS_CHECK_FEATURE([ffreep mnemonic],
4752       gcc_cv_as_ix86_ffreep,,
4753       [ffreep %st(1)],,
4754       [AC_DEFINE(HAVE_AS_IX86_FFREEP, 1,
4755         [Define if your assembler supports the ffreep mnemonic.])])
4756
4757     gcc_GAS_CHECK_FEATURE([.quad directive],
4758       gcc_cv_as_ix86_quad,,
4759       [.quad 0],,
4760       [AC_DEFINE(HAVE_AS_IX86_QUAD, 1,
4761         [Define if your assembler supports the .quad directive.])])
4762
4763     gcc_GAS_CHECK_FEATURE([sahf mnemonic],
4764       gcc_cv_as_ix86_sahf,,
4765       [.code64
4766        sahf],,
4767       [AC_DEFINE(HAVE_AS_IX86_SAHF, 1,
4768         [Define if your assembler supports the sahf mnemonic in 64bit mode.])])
4769
4770     gcc_GAS_CHECK_FEATURE([interunit movq mnemonic],
4771       gcc_cv_as_ix86_interunit_movq,,
4772       [.code64
4773        movq %mm0, %rax
4774        movq %rax, %xmm0])
4775     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_INTERUNIT_MOVQ,
4776       [`if test $gcc_cv_as_ix86_interunit_movq = yes; then echo 1; else echo 0; fi`],
4777       [Define if your assembler supports interunit movq mnemonic.])
4778
4779     gcc_GAS_CHECK_FEATURE([hle prefixes],
4780       gcc_cv_as_ix86_hle,,
4781       [lock xacquire cmpxchg %esi, (%ecx)],,
4782       [AC_DEFINE(HAVE_AS_IX86_HLE, 1,
4783         [Define if your assembler supports HLE prefixes.])])
4784
4785     gcc_GAS_CHECK_FEATURE([swap suffix],
4786       gcc_cv_as_ix86_swap,,
4787       [movl.s %esp, %ebp],,
4788       [AC_DEFINE(HAVE_AS_IX86_SWAP, 1,
4789         [Define if your assembler supports the swap suffix.])])
4790
4791     gcc_GAS_CHECK_FEATURE([different section symbol subtraction],
4792       gcc_cv_as_ix86_diff_sect_delta,,
4793       [.section .rodata
4794 .L1:
4795         .long .L2-.L1
4796         .long .L3-.L1
4797         .text
4798 .L3:    nop
4799 .L2:    nop],,
4800       [AC_DEFINE(HAVE_AS_IX86_DIFF_SECT_DELTA, 1,
4801         [Define if your assembler supports the subtraction of symbols in different sections.])])
4802
4803     gcc_GAS_CHECK_FEATURE([rep and lock prefix],
4804         gcc_cv_as_ix86_rep_lock_prefix,,
4805         [rep movsl
4806          rep ret
4807          rep nop
4808          rep bsf %ecx, %eax
4809          rep bsr %ecx, %eax
4810          lock addl %edi, (%eax,%esi)
4811          lock orl $0, (%esp)],,
4812         [AC_DEFINE(HAVE_AS_IX86_REP_LOCK_PREFIX, 1,
4813           [Define if the assembler supports 'rep <insn>, lock <insn>'.])])
4814
4815     gcc_GAS_CHECK_FEATURE([ud2 mnemonic],
4816         gcc_cv_as_ix86_ud2,,
4817         [ud2],,
4818       [AC_DEFINE(HAVE_AS_IX86_UD2, 1,
4819         [Define if your assembler supports the 'ud2' mnemonic.])])
4820
4821     # Enforce 32-bit output with gas and gld.
4822     if test x$gas = xyes; then
4823       as_ix86_gas_32_opt="--32"
4824     fi
4825     if echo "$ld_ver" | grep GNU > /dev/null; then
4826       if $gcc_cv_ld -V 2>/dev/null | grep elf_i386_sol2 > /dev/null; then
4827         ld_ix86_gld_32_opt="-melf_i386_sol2"
4828       else
4829         ld_ix86_gld_32_opt="-melf_i386"
4830       fi
4831     fi
4832
4833     gcc_GAS_CHECK_FEATURE([R_386_TLS_GD_PLT reloc],
4834         gcc_cv_as_ix86_tlsgdplt,
4835         [$as_ix86_gas_32_opt],
4836         [call    tls_gd@tlsgdplt],
4837         [if test x$gcc_cv_ld != x \
4838          && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o -G > /dev/null 2>&1; then
4839            gcc_cv_as_ix86_tlsgdplt=yes
4840          fi
4841          rm -f conftest],
4842       [AC_DEFINE(HAVE_AS_IX86_TLSGDPLT, 1,
4843         [Define if your assembler and linker support @tlsgdplt.])])
4844
4845     conftest_s='
4846         .section .tdata,"aw'$tls_section_flag'",@progbits
4847 tls_ld:
4848         .section .text,"ax",@progbits
4849          call    tls_ld@tlsldmplt'
4850
4851     gcc_GAS_CHECK_FEATURE([R_386_TLS_LDM_PLT reloc],
4852         gcc_cv_as_ix86_tlsldmplt,
4853         [$as_ix86_gas_32_opt],
4854         [$conftest_s],
4855         [if test x$gcc_cv_ld != x \
4856          && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o -G > /dev/null 2>&1; then
4857            gcc_cv_as_ix86_tlsldmplt=yes
4858          fi
4859          rm -f conftest])
4860     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_TLSLDMPLT,
4861       [`if test $gcc_cv_as_ix86_tlsldmplt = yes; then echo 1; else echo 0; fi`],
4862       [Define to 1 if your assembler and linker support @tlsldmplt.])
4863
4864     conftest_s='
4865         .section .text,"ax",@progbits
4866         .globl  _start
4867         .type   _start, @function
4868 _start:
4869         leal    value@tlsldm(%ebx), %eax
4870         call    ___tls_get_addr@plt
4871
4872         .section .tdata,"aw'$tls_section_flag'",@progbits
4873         .type   value, @object
4874 value:'
4875     gcc_GAS_CHECK_FEATURE([R_386_TLS_LDM reloc],
4876         gcc_cv_as_ix86_tlsldm,
4877         [$as_ix86_gas_32_opt],
4878         [$conftest_s],
4879         [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
4880             && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o $ld_tls_libs -lc > /dev/null 2>&1; then
4881            if $gcc_cv_objdump -d conftest 2>/dev/null | grep nop > /dev/null \
4882               || dis conftest 2>/dev/null | grep nop > /dev/null; then
4883              gcc_cv_as_ix86_tlsldm=yes
4884            fi
4885          fi
4886          rm -f conftest])
4887     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_TLSLDM,
4888       [`if test $gcc_cv_as_ix86_tlsldm = yes; then echo 1; else echo 0; fi`],
4889       [Define to 1 if your assembler and linker support @tlsldm.])
4890
4891     conftest_s='
4892         .data
4893 bar:
4894         .byte 1
4895         .text
4896         .global _start
4897 _start:
4898          cmpl $0, bar@GOT
4899          jmp *_start@GOT'
4900     gcc_GAS_CHECK_FEATURE([R_386_GOT32X reloc],
4901         gcc_cv_as_ix86_got32x,
4902         [$as_ix86_gas_32_opt],
4903         [$conftest_s],
4904         [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
4905             && test x$gcc_cv_readelf != x \
4906             && $gcc_cv_readelf --relocs --wide conftest.o 2>&1 \
4907                | grep R_386_GOT32X > /dev/null 2>&1 \
4908             && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o > /dev/null 2>&1; then
4909            if $gcc_cv_objdump -dw conftest 2>&1 \
4910               | grep 0xffffff > /dev/null 2>&1; then
4911              gcc_cv_as_ix86_got32x=no
4912            else
4913              gcc_cv_as_ix86_got32x=yes
4914            fi
4915          fi
4916          rm -f conftest])
4917     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_GOT32X,
4918       [`if test x"$gcc_cv_as_ix86_got32x" = xyes; then echo 1; else echo 0; fi`],
4919       [Define 0/1 if your assembler and linker support @GOT.])
4920
4921     gcc_GAS_CHECK_FEATURE([GOTOFF in data],
4922       gcc_cv_as_ix86_gotoff_in_data,
4923       [$as_ix86_gas_32_opt],
4924 [       .text
4925 .L0:
4926         nop
4927         .data
4928         .long .L0@GOTOFF])
4929     AC_DEFINE_UNQUOTED(HAVE_AS_GOTOFF_IN_DATA,
4930       [`if test $gcc_cv_as_ix86_gotoff_in_data = yes; then echo 1; else echo 0; fi`],
4931       [Define true if the assembler supports '.long foo@GOTOFF'.])
4932
4933     conftest_s='
4934         .section .text,"ax",@progbits
4935         .globl  _start
4936         .type   _start, @function
4937 _start:
4938         leal    ld@tlsldm(%ecx), %eax
4939         call    *___tls_get_addr@GOT(%ecx)
4940         leal    gd@tlsgd(%ecx), %eax
4941         call    *___tls_get_addr@GOT(%ecx)
4942
4943         .section .tdata,"aw'$tls_section_flag'",@progbits
4944         .type   ld, @object
4945 ld:
4946         .byte 0
4947         .globl  gd
4948         .type   gd, @object
4949 gd:
4950         .byte 0'
4951     gcc_GAS_CHECK_FEATURE([calling ___tls_get_addr via GOT],
4952         gcc_cv_as_ix86_tls_get_addr_via_got,
4953         [$as_ix86_gas_32_opt],
4954         [$conftest_s],
4955         [if test x$gcc_cv_ld != x \
4956             && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o > /dev/null 2>&1; then
4957            gcc_cv_as_ix86_tls_get_addr_via_got=yes
4958          fi
4959          rm -f conftest])
4960     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_TLS_GET_ADDR_GOT,
4961       [`if test x"$gcc_cv_as_ix86_tls_get_addr_via_got" = xyes; then echo 1; else echo 0; fi`],
4962       [Define 0/1 if your assembler and linker support calling ___tls_get_addr via GOT.])
4963     ;;
4964
4965   ia64*-*-*)
4966     gcc_GAS_CHECK_FEATURE([ltoffx and ldxmov relocs],
4967         gcc_cv_as_ia64_ltoffx_ldxmov_relocs,,
4968 [       .text
4969         addl r15 = @ltoffx(x#), gp
4970         ;;
4971         ld8.mov r16 = [[r15]], x#
4972 ],,
4973     [AC_DEFINE(HAVE_AS_LTOFFX_LDXMOV_RELOCS, 1,
4974           [Define if your assembler supports ltoffx and ldxmov relocations.])])
4975
4976     ;;
4977
4978   powerpc*-*-*)
4979
4980     case $target in
4981       *-*-darwin*)
4982         gcc_GAS_CHECK_FEATURE([.machine directive support],
4983           gcc_cv_as_machine_directive,,
4984           [     .machine ppc7400])
4985         if test x$gcc_cv_as_machine_directive != xyes; then
4986           echo "*** This target requires an assembler supporting \".machine\"" >&2
4987           echo you can get it from: https://gcc.gnu.org/pub/gcc/infrastructure/cctools-528.5.dmg >&2
4988           test x$build = x$target && exit 1
4989         fi
4990         ;;
4991     esac
4992
4993     case $target in
4994       *-*-aix*) conftest_s='    .machine "pwr5"
4995         .csect .text[[PR]]
4996         mfcr 3,128';;
4997       *-*-darwin*) conftest_s=' .text
4998         mfcr r3,128';;
4999       *) conftest_s='   .machine power4
5000         .text
5001         mfcr 3,128';;
5002     esac
5003
5004     gcc_GAS_CHECK_FEATURE([mfcr field support],
5005       gcc_cv_as_powerpc_mfcrf,,
5006       [$conftest_s],,
5007       [AC_DEFINE(HAVE_AS_MFCRF, 1,
5008           [Define if your assembler supports mfcr field.])])
5009
5010     case $target in
5011       *-*-aix*) conftest_s='    .csect .text[[PR]]
5012 LCF..0:
5013         addis 11,30,_GLOBAL_OFFSET_TABLE_-LCF..0@ha';;
5014       *-*-darwin*)
5015         conftest_s='    .text
5016 LCF0:
5017         addis r11,r30,_GLOBAL_OFFSET_TABLE_-LCF0@ha';;
5018       *) conftest_s='   .text
5019 .LCF0:
5020         addis 11,30,_GLOBAL_OFFSET_TABLE_-.LCF0@ha';;
5021     esac
5022
5023     gcc_GAS_CHECK_FEATURE([rel16 relocs],
5024       gcc_cv_as_powerpc_rel16, -a32,
5025       [$conftest_s],,
5026       [AC_DEFINE(HAVE_AS_REL16, 1,
5027           [Define if your assembler supports R_PPC_REL16 relocs.])])
5028
5029     case $target in
5030       *-*-aix*) conftest_s='    .machine "pwr7"
5031         .csect .text[[PR]]
5032         lxvd2x 1,2,3';;
5033       *) conftest_s='   .machine power7
5034         .text
5035         lxvd2x 1,2,3';;
5036     esac
5037
5038     gcc_GAS_CHECK_FEATURE([vector-scalar support],
5039       gcc_cv_as_powerpc_vsx, -a32,
5040       [$conftest_s],,
5041       [AC_DEFINE(HAVE_AS_VSX, 1,
5042           [Define if your assembler supports VSX instructions.])])
5043
5044     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
5045       gcc_cv_as_powerpc_gnu_attribute,,
5046       [.gnu_attribute 4,1],,
5047       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
5048           [Define if your assembler supports .gnu_attribute.])])
5049
5050     gcc_GAS_CHECK_FEATURE([prologue entry point marker support],
5051       gcc_cv_as_powerpc_entry_markers,-a64 --fatal-warnings,
5052       [ .reloc .,R_PPC64_ENTRY; nop],,
5053       [AC_DEFINE(HAVE_AS_ENTRY_MARKERS, 1,
5054           [Define if your assembler supports the R_PPC64_ENTRY relocation.])])
5055
5056     gcc_GAS_CHECK_FEATURE([plt sequence marker support],
5057       gcc_cv_as_powerpc_pltseq_markers,-a32 --fatal-warnings,
5058       [ .reloc .,R_PPC_PLTSEQ; nop],,
5059       [AC_DEFINE(HAVE_AS_PLTSEQ, 1,
5060           [Define if your assembler supports R_PPC*_PLTSEQ relocations.])])
5061
5062     case $target in
5063       *-*-aix*)
5064         gcc_GAS_CHECK_FEATURE([AIX .ref support],
5065           gcc_cv_as_aix_ref,,
5066           [     .csect stuff[[rw]]
5067              stuff:
5068                 .long 1
5069                 .extern sym
5070                 .ref sym
5071           ],,
5072           [AC_DEFINE(HAVE_AS_REF, 1,
5073             [Define if your assembler supports .ref])])
5074         ;;
5075     esac
5076     ;;
5077
5078   mips*-*-*)
5079     gcc_GAS_CHECK_FEATURE([explicit relocation support],
5080       gcc_cv_as_mips_explicit_relocs,,
5081 [       lw $4,%gp_rel(foo)($4)],,
5082       [if test x$target_cpu_default = x
5083        then target_cpu_default=MASK_EXPLICIT_RELOCS
5084        else target_cpu_default="($target_cpu_default)|MASK_EXPLICIT_RELOCS"
5085        fi])
5086
5087     gcc_GAS_CHECK_FEATURE([-mno-shared support],
5088       gcc_cv_as_mips_no_shared,[-mno-shared], [nop],,
5089       [AC_DEFINE(HAVE_AS_NO_SHARED, 1,
5090                  [Define if the assembler understands -mno-shared.])])
5091
5092     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
5093       gcc_cv_as_mips_gnu_attribute,,
5094       [.gnu_attribute 4,1],,
5095       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
5096           [Define if your assembler supports .gnu_attribute.])])
5097
5098     gcc_GAS_CHECK_FEATURE([.module support],
5099       gcc_cv_as_mips_dot_module,[-32],
5100       [.module mips2
5101        .module fp=xx],,
5102       [AC_DEFINE(HAVE_AS_DOT_MODULE, 1,
5103           [Define if your assembler supports .module.])])
5104     if test x$gcc_cv_as_mips_dot_module = xno \
5105        && test x$with_fp_32 != x; then
5106       AC_MSG_ERROR(
5107         [Requesting --with-fp-32= requires assembler support for .module.])
5108     fi
5109
5110     gcc_GAS_CHECK_FEATURE([.micromips support],
5111       gcc_cv_as_micromips_support,[--fatal-warnings],
5112       [.set micromips],,
5113       [AC_DEFINE(HAVE_GAS_MICROMIPS, 1,
5114           [Define if your assembler supports the .set micromips directive])])
5115
5116     gcc_GAS_CHECK_FEATURE([.dtprelword support],
5117       gcc_cv_as_mips_dtprelword,,
5118       [.section .tdata,"awT",@progbits
5119 x:
5120         .word 2
5121         .text
5122         .dtprelword x+0x8000],,
5123       [AC_DEFINE(HAVE_AS_DTPRELWORD, 1,
5124           [Define if your assembler supports .dtprelword.])])
5125
5126     gcc_GAS_CHECK_FEATURE([DSPR1 mult with four accumulators support],
5127       gcc_cv_as_mips_dspr1_mult,,
5128 [       .set    mips32r2
5129         .set    nodspr2
5130         .set    dsp
5131         madd    $ac3,$4,$5
5132         maddu   $ac3,$4,$5
5133         msub    $ac3,$4,$5
5134         msubu   $ac3,$4,$5
5135         mult    $ac3,$4,$5
5136         multu   $ac3,$4,$5],,
5137       [AC_DEFINE(HAVE_AS_DSPR1_MULT, 1,
5138           [Define if your assembler supports DSPR1 mult.])])
5139
5140     AC_MSG_CHECKING(assembler and linker for explicit JALR relocation)
5141     gcc_cv_as_ld_jalr_reloc=no
5142     if test $gcc_cv_as_mips_explicit_relocs = yes; then
5143       if test $in_tree_ld = yes ; then
5144         if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 20 -o "$gcc_cv_gld_major_version" -gt 2 \
5145            && test $in_tree_ld_is_elf = yes; then
5146           gcc_cv_as_ld_jalr_reloc=yes
5147         fi
5148       elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x; then
5149         echo '  .ent x' > conftest.s
5150         echo 'x:        lw $2,%got_disp(y)($3)' >> conftest.s
5151         echo '  lw $25,%call16(y)($28)' >> conftest.s
5152         echo '  .reloc  1f,R_MIPS_JALR,y' >> conftest.s
5153         echo '1:        jalr $25' >> conftest.s
5154         echo '  .reloc  1f,R_MIPS_JALR,x' >> conftest.s
5155         echo '1:        jalr $25' >> conftest.s
5156         echo '  .end x' >> conftest.s
5157         if $gcc_cv_as -o conftest.o conftest.s >/dev/null 2>&AS_MESSAGE_LOG_FD \
5158            && $gcc_cv_ld -shared -o conftest.so conftest.o >/dev/null 2>&AS_MESSAGE_LOG_FD; then
5159           if $gcc_cv_objdump -d conftest.so | grep jalr >/dev/null 2>&1 \
5160              && $gcc_cv_objdump -d conftest.so | grep "bal.*<x>" >/dev/null 2>&1; then
5161             gcc_cv_as_ld_jalr_reloc=yes
5162           fi
5163         fi
5164         rm -f conftest.*
5165       fi
5166     fi
5167     if test $gcc_cv_as_ld_jalr_reloc = yes; then
5168       if test x$target_cpu_default = x; then
5169         target_cpu_default=MASK_RELAX_PIC_CALLS
5170       else
5171         target_cpu_default="($target_cpu_default)|MASK_RELAX_PIC_CALLS"
5172       fi
5173     fi
5174     AC_MSG_RESULT($gcc_cv_as_ld_jalr_reloc)
5175
5176     AC_CACHE_CHECK([linker for .eh_frame personality relaxation],
5177       [gcc_cv_ld_mips_personality_relaxation],
5178       [gcc_cv_ld_mips_personality_relaxation=no
5179        if test $in_tree_ld = yes ; then
5180          if test "$gcc_cv_gld_major_version" -eq 2 \
5181                  -a "$gcc_cv_gld_minor_version" -ge 21 \
5182                  -o "$gcc_cv_gld_major_version" -gt 2; then
5183            gcc_cv_ld_mips_personality_relaxation=yes
5184          fi
5185        elif test x$gcc_cv_as != x \
5186                  -a x$gcc_cv_ld != x \
5187                  -a x$gcc_cv_readelf != x ; then
5188          cat > conftest.s <<EOF
5189         .cfi_startproc
5190         .cfi_personality 0x80,indirect_ptr
5191         .ent test
5192 test:
5193         nop
5194         .end test
5195         .cfi_endproc
5196
5197         .section .data,"aw",@progbits
5198 indirect_ptr:
5199         .dc.a personality
5200 EOF
5201          if $gcc_cv_as -KPIC -o conftest.o conftest.s > /dev/null 2>&1 \
5202             && $gcc_cv_ld -o conftest conftest.o -shared > /dev/null 2>&1; then
5203            if $gcc_cv_readelf -d conftest 2>&1 \
5204               | grep TEXTREL > /dev/null 2>&1; then
5205              :
5206            elif $gcc_cv_readelf --relocs conftest 2>&1 \
5207                 | grep 'R_MIPS_REL32 *$' > /dev/null 2>&1; then
5208              :
5209            else
5210              gcc_cv_ld_mips_personality_relaxation=yes
5211            fi
5212          fi
5213        fi
5214        rm -f conftest.s conftest.o conftest])
5215     if test x$gcc_cv_ld_mips_personality_relaxation = xyes; then
5216             AC_DEFINE(HAVE_LD_PERSONALITY_RELAXATION, 1,
5217       [Define if your linker can relax absolute .eh_frame personality
5218 pointers into PC-relative form.])
5219     fi
5220
5221     gcc_GAS_CHECK_FEATURE([-mnan= support],
5222       gcc_cv_as_mips_nan,
5223       [-mnan=2008],,,
5224       [AC_DEFINE(HAVE_AS_NAN, 1,
5225                  [Define if the assembler understands -mnan=.])])
5226     if test x$gcc_cv_as_mips_nan = xno \
5227        && test x$with_nan != x; then
5228       AC_MSG_ERROR(
5229         [Requesting --with-nan= requires assembler support for -mnan=])
5230     fi
5231     ;;
5232     msp430-*-*)
5233     # Earlier GAS versions generically support .gnu_attribute, but the
5234     # msp430 assembler will not do anything with it.
5235     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
5236       gcc_cv_as_msp430_gnu_attribute,,
5237       [.gnu_attribute 4,1],,
5238       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
5239           [Define if your assembler supports .gnu_attribute.])])
5240     gcc_GAS_CHECK_FEATURE([.mspabi_attribute support],
5241       gcc_cv_as_msp430_mspabi_attribute,,
5242       [.mspabi_attribute 4,2],,
5243       [AC_DEFINE(HAVE_AS_MSPABI_ATTRIBUTE, 1,
5244           [Define if your assembler supports .mspabi_attribute.])])
5245     if test x$enable_newlib_nano_formatted_io = xyes; then
5246       AC_DEFINE(HAVE_NEWLIB_NANO_FORMATTED_IO, 1, [Define if GCC has been
5247 configured with --enable-newlib-nano-formatted-io.])
5248       fi
5249     ;;
5250     nios2-*-*)
5251     # Versions 2.33 and earlier lacked support for the %gotoff relocation
5252     # syntax that is documented in the ABI specification.
5253     gcc_GAS_CHECK_FEATURE([support for %gotoff relocations in constant data],
5254       gcc_cv_as_nios2_gotoff_relocation,,
5255 [       .extern foo
5256         .data
5257         .long %gotoff(foo)],,
5258       [AC_DEFINE(HAVE_AS_NIOS2_GOTOFF_RELOCATION, 1,
5259           [Define if your assembler supports %gotoff relocation syntax.])])
5260     ;;
5261     riscv*-*-*)
5262     gcc_GAS_CHECK_FEATURE([.attribute support],
5263       gcc_cv_as_riscv_attribute,,
5264       [.attribute stack_align,4],,
5265       [AC_DEFINE(HAVE_AS_RISCV_ATTRIBUTE, 1,
5266           [Define if your assembler supports .attribute.])])
5267     gcc_GAS_CHECK_FEATURE([-misa-spec= support],
5268       gcc_cv_as_riscv_isa_spec,
5269       [-misa-spec=2.2],,,
5270       [AC_DEFINE(HAVE_AS_MISA_SPEC, 1,
5271                  [Define if the assembler understands -misa-spec=.])])
5272     gcc_GAS_CHECK_FEATURE([-march=rv32i_zifencei support],
5273       gcc_cv_as_riscv_march_zifencei,
5274       [-march=rv32i_zifencei2p0],,,
5275       [AC_DEFINE(HAVE_AS_MARCH_ZIFENCEI, 1,
5276                  [Define if the assembler understands -march=rv*_zifencei.])])
5277     ;;
5278     loongarch*-*-*)
5279     gcc_GAS_CHECK_FEATURE([.dtprelword support],
5280       gcc_cv_as_loongarch_dtprelword, [2,18,0],,
5281       [.section .tdata,"awT",@progbits
5282 x:
5283         .word 2
5284         .text
5285         .dtprelword x+0x8000],,
5286       [AC_DEFINE(HAVE_AS_DTPRELWORD, 1,
5287           [Define if your assembler supports .dtprelword.])])
5288     gcc_GAS_CHECK_FEATURE([explicit relocation support],
5289       gcc_cv_as_loongarch_explicit_relocs,,
5290       [a:pcalau12i $t0,%pc_hi20(a)],,
5291       [AC_DEFINE(HAVE_AS_EXPLICIT_RELOCS, 1,
5292           [Define if your assembler supports explicit relocation.])])
5293     gcc_GAS_CHECK_FEATURE([eh_frame pcrel encoding support],
5294       gcc_cv_as_loongarch_eh_frame_pcrel_encoding_support,,
5295       [.cfi_startproc
5296        .cfi_personality 0x9b,a
5297        .cfi_lsda 0x1b,b
5298        .cfi_endproc],,
5299       [AC_DEFINE(HAVE_AS_EH_FRAME_PCREL_ENCODING_SUPPORT, 1,
5300           [Define if your assembler supports eh_frame pcrel encoding.])])
5301     ;;
5302     s390*-*-*)
5303     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
5304       gcc_cv_as_s390_gnu_attribute,,
5305       [.gnu_attribute 8,1],,
5306       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
5307           [Define if your assembler supports .gnu_attribute.])])
5308     gcc_GAS_CHECK_FEATURE([.machine and .machinemode support],
5309       gcc_cv_as_s390_machine_machinemode,,
5310       [ .machinemode push
5311         .machinemode pop
5312         .machine push
5313         .machine pop],,
5314       [AC_DEFINE(HAVE_AS_MACHINE_MACHINEMODE, 1,
5315           [Define if your assembler supports .machine and .machinemode.])])
5316     gcc_GAS_CHECK_FEATURE([architecture modifiers support],
5317       gcc_cv_as_s390_architecture_modifiers,,
5318       [ .machine z13+vx ],,
5319       [AC_DEFINE(HAVE_AS_ARCHITECTURE_MODIFIERS, 1,
5320           [Define if your assembler supports architecture modifiers.])])
5321     gcc_GAS_CHECK_FEATURE([vector load/store alignment hints],
5322       gcc_cv_as_s390_vector_loadstore_alignment_hints,,
5323       [ vl %v24,0(%r15),3 ],,
5324       [AC_DEFINE(HAVE_AS_VECTOR_LOADSTORE_ALIGNMENT_HINTS, 1,
5325           [Define if your assembler supports vl/vst/vlm/vstm with an optional alignment hint argument.])])
5326     gcc_GAS_CHECK_FEATURE([vector load/store alignment hints on z13],
5327       gcc_cv_as_s390_vector_loadstore_alignment_hints_on_z13, [-mzarch -march=z13],
5328       [ vl %v24,0(%r15),3 ],,
5329       [AC_DEFINE(HAVE_AS_VECTOR_LOADSTORE_ALIGNMENT_HINTS_ON_Z13, 1,
5330           [Define if your assembler supports vl/vst/vlm/vstm with an optional alignment hint argument on z13.])])
5331
5332     ;;
5333 esac
5334
5335 # Mips, LoongArch and HP-UX need the GNU assembler.
5336 # Linux on IA64 might be able to use the Intel assembler.
5337
5338 case "$target" in
5339   mips*-*-* | loongarch*-*-* | *-*-hpux* )
5340     if test x$gas_flag = xyes \
5341        || test x"$host" != x"$build" \
5342        || test ! -x "$gcc_cv_as" \
5343        || "$gcc_cv_as" -v < /dev/null 2>&1 | grep GNU > /dev/null; then
5344       :
5345     else
5346       echo "*** This configuration requires the GNU assembler" >&2
5347       exit 1
5348     fi
5349     ;;
5350 esac
5351
5352 # AMD GCN needs the LLVM assembler and linker.
5353 # Test that LLVM is at least 13.0.1.
5354 case "$target" in
5355   amdgcn-* | gcn-*)
5356     AC_MSG_CHECKING(llvm assembler version)
5357     gcc_cv_as_version="unknown"
5358     if test x$gcc_cv_as != x; then
5359       gcc_cv_as_version=`$gcc_cv_as --version 2>&1 | sed -ne '/version/s/.* \([[0-9]]\)/\1/p' || echo error`
5360       case "$gcc_cv_as_version" in
5361         13.0.[[1-9]]*) ;;          # 13.0.1+
5362         13.[[1-9]]*) ;;            # 13.1+
5363         1[[4-9]]*) ;;              # 14..19
5364         [[2-9]][[0-9]]*) ;;        # 20..99
5365         [[1-9]][[0-9]][[0-9]]*) ;; # 100+
5366         error) AC_MSG_ERROR([cannot determine LLVM version]) ;;
5367         *) AC_MSG_ERROR([LLVM 13.0.1 or later is required (found LLVM $gcc_cv_as_version)]) ;;
5368       esac
5369     fi
5370     AC_MSG_RESULT([$gcc_cv_as_version, ok])
5371     ;;
5372 esac
5373
5374 case "$target" in
5375   arm*)
5376     gcc_GAS_CHECK_FEATURE([assembler for arm accepts context-specific architecture extensions],
5377       gcc_cv_as_arm_option_extensions,
5378       [-march=armv8.1-m.main+mve],
5379       [.text
5380         .thumb
5381         .syntax unified
5382         vmov.f32 s0, s1],,
5383       [AC_DEFINE(HAVE_GAS_ARM_EXTENDED_ARCH, 1,
5384        [Define if your Arm assembler permits context-specific feature extensions.])])
5385 esac
5386
5387 # ??? Not all targets support dwarf2 debug_line, even within a version
5388 # of gas.  Moreover, we need to emit a valid instruction to trigger any
5389 # info to the output file.  So, as supported targets are added to gas 2.11,
5390 # add some instruction here to (also) show we expect this might work.
5391 # ??? Once 2.11 is released, probably need to add first known working
5392 # version to the per-target configury.
5393 case "$cpu_type" in
5394   aarch64 | alpha | arc | arm | avr | bfin | cris | csky | i386 | loongarch | m32c \
5395   | m68k | microblaze | mips | nds32 | nios2 | pa | riscv | rs6000 | score | sparc \
5396   | visium | xstormy16 | xtensa)
5397     insn="nop"
5398     ;;
5399   ia64 | s390)
5400     insn="nop 0"
5401     ;;
5402   mmix)
5403     insn="swym 0"
5404     ;;
5405 esac
5406 if test x"$insn" != x; then
5407  conftest_s="\
5408         .file 1 \"conftest.s\"
5409         .loc 1 3 0
5410         $insn"
5411  gcc_GAS_CHECK_FEATURE([dwarf2 debug_line support],
5412   gcc_cv_as_dwarf2_debug_line,,
5413   [$conftest_s],
5414   [if test x$gcc_cv_objdump != x \
5415    && $gcc_cv_objdump -h conftest.o 2> /dev/null \
5416       | grep debug_line > /dev/null 2>&1; then
5417      gcc_cv_as_dwarf2_debug_line=yes
5418    elif test x$gcc_cv_otool != x \
5419    && $gcc_cv_otool -l conftest.o 2> /dev/null \
5420       | grep debug_line > /dev/null 2>&1; then
5421      gcc_cv_as_dwarf2_debug_line=yes
5422    fi])
5423
5424 # The .debug_line file table must be in the exact order that
5425 # we specified the files, since these indices are also used
5426 # by DW_AT_decl_file.  Approximate this test by testing if
5427 # the assembler bitches if the same index is assigned twice.
5428  gcc_GAS_CHECK_FEATURE([buggy dwarf2 .file directive],
5429   gcc_cv_as_dwarf2_file_buggy,,
5430 [       .file 1 "foo.s"
5431         .file 1 "bar.s"])
5432
5433  if test $gcc_cv_as_dwarf2_debug_line = yes \
5434  && test $gcc_cv_as_dwarf2_file_buggy = no; then
5435     AC_DEFINE(HAVE_AS_DWARF2_DEBUG_LINE, 1,
5436   [Define if your assembler supports dwarf2 .file/.loc directives,
5437    and preserves file table indices exactly as given.])
5438
5439     if test $gcc_cv_as_leb128 = yes; then
5440         conftest_s="\
5441         .file 1 \"conftest.s\"
5442         .loc 1 3 0 view .LVU1
5443         $insn
5444         .data
5445         .uleb128 .LVU1
5446         .uleb128 .LVU1
5447 "
5448         gcc_GAS_CHECK_FEATURE([dwarf2 debug_view support],
5449           gcc_cv_as_dwarf2_debug_view,,
5450           [$conftest_s],,
5451           [AC_DEFINE(HAVE_AS_DWARF2_DEBUG_VIEW, 1,
5452   [Define if your assembler supports views in dwarf2 .loc directives.])])
5453     fi
5454  fi
5455
5456  gcc_GAS_CHECK_FEATURE([--gdwarf2 option],
5457   gcc_cv_as_gdwarf2_flag,
5458   [--gdwarf2], [$insn],,
5459   [AC_DEFINE(HAVE_AS_GDWARF2_DEBUG_FLAG, 1,
5460 [Define if your assembler supports the --gdwarf2 option.])])
5461
5462  gcc_GAS_CHECK_FEATURE([--gdwarf-5 option],
5463   gcc_cv_as_gdwarf_5_flag,
5464   [--gdwarf-5], [$insn],
5465   [if test x$gcc_cv_objdump != x \
5466       && $gcc_cv_objdump -Wi conftest.o 2>&1 \
5467          | grep DW_TAG_compile_unit > /dev/null 2>&1; then
5468      gcc_cv_as_gdwarf_5_flag=yes;
5469    fi],[AC_DEFINE(HAVE_AS_GDWARF_5_DEBUG_FLAG, 1,
5470 [Define if your assembler supports the --gdwarf-5 option.])])
5471
5472  case $target_os in
5473    win32 | pe | cygwin* | mingw32*)
5474      section_flags=\"dr\"
5475      function_type=".def foo; .scl 2; .type 32; .endef"
5476      function_size="";;
5477    *)
5478      section_flags=\"\",%progbits
5479      function_type=".type foo, %function"
5480      function_size=".size foo, .-foo";;
5481  esac
5482  dwarf4_debug_info_size=0x46
5483  dwarf4_high_pc_form=7
5484  dwarf4_debug_aranges_size=0x2c
5485  dwarf4_line_sz=9
5486  for dwarf4_addr_size in 8 4; do
5487    conftest_s="\
5488         .file   \"a.c\"
5489         .text
5490 .Ltext0:
5491         .p2align 4
5492         .globl  foo
5493         $function_type
5494 foo:
5495 .LFB0:
5496 .LM1:
5497         $insn
5498 .LM2:
5499 .LFE0:
5500         $function_size
5501 .Letext0:
5502         .section        .debug_info,$section_flags
5503 .Ldebug_info0:
5504         .4byte  $dwarf4_debug_info_size
5505         .2byte  0x4
5506         .4byte  .Ldebug_abbrev0
5507         .byte   0x$dwarf4_addr_size
5508         .byte   0x1
5509         .ascii \"GNU C17\\0\"
5510         .byte   0xc
5511         .ascii \"a.c\\0\"
5512         .ascii \"/\\0\"
5513         .${dwarf4_addr_size}byte        .Ltext0
5514         .${dwarf4_addr_size}byte        .Letext0-.Ltext0
5515         .4byte  .Ldebug_line0
5516         .byte   0x2
5517         .ascii \"foo\\0\"
5518         .byte   0x1
5519         .byte   0x2
5520         .byte   0x1
5521         .${dwarf4_addr_size}byte        .LFB0
5522         .${dwarf4_addr_size}byte        .LFE0-.LFB0
5523         .byte   0x1
5524         .byte   0x9c
5525         .byte   0
5526         .section        .debug_abbrev,$section_flags
5527 .Ldebug_abbrev0:
5528         .byte   0x1
5529         .byte   0x11
5530         .byte   0x1
5531         .byte   0x25
5532         .byte   0x8
5533         .byte   0x13
5534         .byte   0xb
5535         .byte   0x3
5536         .byte   0x8
5537         .byte   0x1b
5538         .byte   0x8
5539         .byte   0x11
5540         .byte   0x1
5541         .byte   0x12
5542         .byte   0x$dwarf4_high_pc_form
5543         .byte   0x10
5544         .byte   0x17
5545         .byte   0
5546         .byte   0
5547         .byte   0x2
5548         .byte   0x2e
5549         .byte   0
5550         .byte   0x3f
5551         .byte   0x19
5552         .byte   0x3
5553         .byte   0x8
5554         .byte   0x3a
5555         .byte   0xb
5556         .byte   0x3b
5557         .byte   0xb
5558         .byte   0x39
5559         .byte   0xb
5560         .byte   0x11
5561         .byte   0x1
5562         .byte   0x12
5563         .byte   0x$dwarf4_high_pc_form
5564         .byte   0x40
5565         .byte   0x18
5566         .byte   0
5567         .byte   0
5568         .byte   0
5569         .section        .debug_aranges,$section_flags
5570         .4byte  $dwarf4_debug_aranges_size
5571         .2byte  0x2
5572         .4byte  .Ldebug_info0
5573         .byte   0x8
5574         .byte   0
5575         .2byte  0
5576         .2byte  0
5577         .${dwarf4_addr_size}byte        .Ltext0
5578         .${dwarf4_addr_size}byte        .Letext0-.Ltext0
5579         .${dwarf4_addr_size}byte        0
5580         .${dwarf4_addr_size}byte        0
5581         .section        .debug_line,$section_flags
5582 .Ldebug_line0:
5583         .4byte  .LELT0-.LSLT0
5584 .LSLT0:
5585         .2byte  0x4
5586         .4byte  .LELTP0-.LASLTP0
5587 .LASLTP0:
5588         .byte   0x1
5589         .byte   0x1
5590         .byte   0x1
5591         .byte   0xf6
5592         .byte   0xf2
5593         .byte   0xd
5594         .byte   0
5595         .byte   0x1
5596         .byte   0x1
5597         .byte   0x1
5598         .byte   0x1
5599         .byte   0
5600         .byte   0
5601         .byte   0
5602         .byte   0x1
5603         .byte   0
5604         .byte   0
5605         .byte   0x1
5606         .byte   0
5607         .ascii \"a.c\\0\"
5608         .byte   0
5609         .byte   0
5610         .byte   0
5611         .byte   0
5612 .LELTP0:
5613         .byte   0
5614         .byte   0x$dwarf4_line_sz
5615         .byte   0x2
5616         .${dwarf4_addr_size}byte        .LM1
5617         .byte   0x18
5618         .byte   0x5
5619         .byte   0x1
5620         .byte   0
5621         .byte   0x$dwarf4_line_sz
5622         .byte   0x2
5623         .${dwarf4_addr_size}byte        .LM2
5624         .byte   0x1
5625         .byte   0x5
5626         .byte   0x1
5627         .byte   0
5628         .byte   0x$dwarf4_line_sz
5629         .byte   0x2
5630         .${dwarf4_addr_size}byte        .Letext0
5631         .byte   0
5632         .byte   0x1
5633         .byte   0x1
5634 .LELT0:
5635         .section        .debug_str,$section_flags
5636         .ident  \"GCC\"
5637 "
5638    dwarf4_success=no
5639    if test $dwarf4_addr_size = 4; then
5640      gcc_GAS_CHECK_FEATURE([assembly of compiler generated 32-bit .debug_line],
5641       gcc_cv_as_debug_line_32_flag,,
5642       [$conftest_s],,
5643       [dwarf4_success=yes])
5644    else
5645      gcc_GAS_CHECK_FEATURE([assembly of compiler generated 64-bit .debug_line],
5646       gcc_cv_as_debug_line_64_flag,,
5647       [$conftest_s],,
5648       [dwarf4_success=yes])
5649    fi
5650    if test $dwarf4_success = yes; then
5651      dwarf4_success=no
5652      gcc_GAS_CHECK_FEATURE([--gdwarf-4 not refusing compiler generated .debug_line],
5653       gcc_cv_as_dwarf_4_debug_line_flag,
5654       [--gdwarf-4], [$conftest_s],,
5655       [dwarf4_success=yes])
5656      break
5657    fi
5658    dwarf4_debug_info_size=0x36
5659    dwarf4_high_pc_form=6
5660    dwarf4_debug_aranges_size=0x1c
5661    dwarf4_line_sz=5
5662  done
5663
5664  if test $dwarf4_success = yes; then
5665    conftest_s="\
5666         .file   \"foo.c\"
5667         .text
5668 bar:
5669 #APP
5670 # 82 \"xxx.h\" 1
5671         $insn
5672 # 0 \"\" 2
5673 #NO_APP
5674         $insn
5675 foo:
5676         .file 1 \"foo.c\"
5677         $insn
5678         .file 2 \"foo.h\"
5679         ret
5680 "
5681    dwarf4_success=no
5682    gcc_GAS_CHECK_FEATURE([--gdwarf-4 with the APP marker],
5683      gcc_cv_as_dwarf_4_app_flag,
5684      [--gdwarf-4], [$conftest_s],, [dwarf4_success=yes])
5685  fi
5686
5687  if test $dwarf4_success = yes; then
5688    conftest_s="\
5689         .text
5690         .globl  foo
5691         $function_type
5692 foo:
5693         $insn
5694         $function_size
5695         .file   1 \"foo.c\"
5696 "
5697    gcc_GAS_CHECK_FEATURE([working --gdwarf-4/--gdwarf-5 for all sources],
5698      gcc_cv_as_working_gdwarf_n_flag,
5699      [--gdwarf-4],
5700      [$conftest_s],
5701      [changequote(,)dnl
5702       if test x$gcc_cv_objdump != x \
5703          && $gcc_cv_objdump -W conftest.o 2>&1 \
5704                 | grep conftest.s > /dev/null 2>&1; then
5705         gcc_cv_as_working_gdwarf_n_flag=no
5706       else
5707         gcc_cv_as_working_gdwarf_n_flag=yes
5708       fi
5709       changequote([,])dnl])
5710    if test $gcc_cv_as_working_gdwarf_n_flag = yes; then
5711      AC_DEFINE(HAVE_AS_WORKING_DWARF_N_FLAG, 1,
5712 [Define if your assembler supports --gdwarf-4/--gdwarf-5 even with
5713  compiler generated .debug_line.])
5714    fi
5715  fi
5716
5717  gcc_GAS_CHECK_FEATURE([--debug-prefix-map option],
5718   gcc_cv_as_debug_prefix_map_flag,
5719   [--debug-prefix-map /a=/b], [$insn],,
5720   [AC_DEFINE(HAVE_AS_DEBUG_PREFIX_MAP, 1,
5721 [Define if your assembler supports the --debug-prefix-map option.])])
5722 fi
5723
5724 gcc_GAS_CHECK_FEATURE([compressed debug sections],
5725   gcc_cv_as_compress_debug,,,
5726   [# gas compiled without zlib cannot compress debug sections and warns
5727    # about it, but still exits successfully.  So check for this, too.
5728    if $gcc_cv_as --compress-debug-sections -o conftest.o conftest.s 2>&1 | grep -i warning > /dev/null
5729    then
5730      gcc_cv_as_compress_debug=0
5731    # Since binutils 2.26, gas supports --compress-debug-sections=type,
5732    # defaulting to the ELF gABI format.
5733    elif $gcc_cv_as --compress-debug-sections=zlib-gnu -o conftest.o conftest.s > /dev/null 2>&1
5734    then
5735      gcc_cv_as_compress_debug=2
5736      gcc_cv_as_compress_debug_option="--compress-debug-sections"
5737      gcc_cv_as_no_compress_debug_option="--nocompress-debug-sections"
5738    # Before binutils 2.26, gas only supported --compress-debug-options and
5739    # emitted the traditional GNU format.
5740    elif $gcc_cv_as --compress-debug-sections -o conftest.o conftest.s > /dev/null 2>&1
5741    then
5742      gcc_cv_as_compress_debug=1
5743      gcc_cv_as_compress_debug_option="--compress-debug-sections"
5744      gcc_cv_as_no_compress_debug_option="--nocompress-debug-sections"
5745    else
5746      gcc_cv_as_compress_debug=0
5747    fi])
5748 AC_DEFINE_UNQUOTED(HAVE_AS_COMPRESS_DEBUG, $gcc_cv_as_compress_debug,
5749 [Define to the level of your assembler's compressed debug section support.])
5750 AC_DEFINE_UNQUOTED(AS_COMPRESS_DEBUG_OPTION, "$gcc_cv_as_compress_debug_option",
5751 [Define to the assembler option to enable compressed debug sections.])
5752 AC_DEFINE_UNQUOTED(AS_NO_COMPRESS_DEBUG_OPTION, "$gcc_cv_as_no_compress_debug_option",
5753 [Define to the assembler option to disable compressed debug sections.])
5754
5755 gcc_GAS_CHECK_FEATURE([.lcomm with alignment], gcc_cv_as_lcomm_with_alignment,,
5756 [.lcomm bar,4,16],,
5757 [AC_DEFINE(HAVE_GAS_LCOMM_WITH_ALIGNMENT, 1,
5758   [Define if your assembler supports .lcomm with an alignment field.])])
5759
5760 if test x$with_sysroot = x && test x$host = x$target \
5761    && test "$prefix" != "/usr" && test "x$prefix" != "x$local_prefix" \
5762    && test "$prefix" != "NONE"; then
5763   AC_DEFINE_UNQUOTED(PREFIX_INCLUDE_DIR, "$prefix/include",
5764 [Define to PREFIX/include if cpp should also search that directory.])
5765 fi
5766
5767 # Determine the version of glibc, if any, used on the target.
5768 AC_MSG_CHECKING([for target glibc version])
5769 AC_ARG_WITH([glibc-version],
5770   [AS_HELP_STRING([--with-glibc-version=M.N],
5771     [assume GCC used with glibc version M.N or later])], [
5772 if [echo "$with_glibc_version" | grep '^[0-9][0-9]*\.[0-9][0-9]*$']; then
5773   glibc_version_major=`echo "$with_glibc_version" | sed -e 's/\..*//'`
5774   glibc_version_minor=`echo "$with_glibc_version" | sed -e 's/.*\.//'`
5775 else
5776   AC_MSG_ERROR([option --with-glibc-version requires a version number M.N])
5777 fi], [
5778 glibc_version_major=0
5779 glibc_version_minor=0
5780 [if test -f $target_header_dir/features.h \
5781   && glibc_version_major_define=`$EGREP '^[     ]*#[    ]*define[       ]+__GLIBC__[    ]+[0-9]' $target_header_dir/features.h` \
5782   && glibc_version_minor_define=`$EGREP '^[     ]*#[    ]*define[       ]+__GLIBC_MINOR__[      ]+[0-9]' $target_header_dir/features.h`; then
5783   glibc_version_major=`echo "$glibc_version_major_define" | sed -e 's/.*__GLIBC__[      ]*//'`
5784   glibc_version_minor=`echo "$glibc_version_minor_define" | sed -e 's/.*__GLIBC_MINOR__[        ]*//'`
5785 fi]])
5786 AC_MSG_RESULT([$glibc_version_major.$glibc_version_minor])
5787 AC_DEFINE_UNQUOTED([TARGET_GLIBC_MAJOR], [$glibc_version_major],
5788 [GNU C Library major version number used on the target, or 0.])
5789 AC_DEFINE_UNQUOTED([TARGET_GLIBC_MINOR], [$glibc_version_minor],
5790 [GNU C Library minor version number used on the target, or 0.])
5791
5792 AC_ARG_ENABLE(gnu-unique-object,
5793  [AS_HELP_STRING([--enable-gnu-unique-object],
5794    [enable the use of the @gnu_unique_object ELF extension on glibc systems])],
5795  [case $enable_gnu_unique_object in
5796     yes | no) ;;
5797     *) AC_MSG_ERROR(['$enable_gnu_unique_object' is an invalid value for --enable-gnu-unique-object.
5798 Valid choices are 'yes' and 'no'.]) ;;
5799   esac],
5800  [gcc_GAS_CHECK_FEATURE([gnu_unique_object], gcc_cv_as_gnu_unique_object,,
5801    [.type foo, '$target_type_format_char'gnu_unique_object],,
5802 # We need to unquote above to to use the definition from config.gcc.
5803 # Also check for ld.so support, i.e. glibc 2.11 or higher.
5804    [GCC_GLIBC_VERSION_GTE_IFELSE([2], [11], [enable_gnu_unique_object=yes], )]
5805    )])
5806 if test x$enable_gnu_unique_object = xyes; then
5807   AC_DEFINE(HAVE_GAS_GNU_UNIQUE_OBJECT, 1,
5808    [Define if your assembler supports @gnu_unique_object.])
5809 fi
5810
5811 AC_CACHE_CHECK([assembler for tolerance to line number 0],
5812  [gcc_cv_as_line_zero],
5813  [gcc_cv_as_line_zero=no
5814   if test "x$gcc_cv_as" != x; then
5815     { echo '# 1 "test.s" 1'; echo '# 0 "" 2'; } > conftest.s
5816     if AC_TRY_COMMAND([$gcc_cv_as -o conftest.o conftest.s >&AS_MESSAGE_LOG_FD 2>conftest.out]) &&
5817        test "x`cat conftest.out`" = x
5818     then
5819       gcc_cv_as_line_zero=yes
5820     else
5821       echo "configure: failed program was" >&AS_MESSAGE_LOG_FD
5822       cat conftest.s >&AS_MESSAGE_LOG_FD
5823       echo "configure: error output was" >&AS_MESSAGE_LOG_FD
5824       cat conftest.out >&AS_MESSAGE_LOG_FD
5825     fi
5826     rm -f conftest.o conftest.s conftest.out
5827   fi])
5828 if test "x$gcc_cv_as_line_zero" = xyes; then
5829   AC_DEFINE([HAVE_AS_LINE_ZERO], 1,
5830 [Define if the assembler won't complain about a line such as # 0 "" 2.])
5831 fi
5832
5833 AC_MSG_CHECKING(support for thin archives)
5834 thin_archive_support=no
5835 echo 'int main (void) { return 0; }' > conftest.c
5836 if ($AR --version | sed 1q | grep "GNU ar" \
5837     && $CC $CFLAGS -c conftest.c \
5838     && $AR rcT conftest.a conftest.o \
5839     && $CC $CFLAGS $LDFLAGS -o conftest conftest.a) >/dev/null 2>&1; then
5840   thin_archive_support=yes
5841 fi
5842 rm -f conftest.c conftest.o conftest.a conftest
5843 AC_MSG_RESULT($thin_archive_support)
5844 AC_SUBST(thin_archive_support)
5845
5846 AC_MSG_CHECKING(linker PT_GNU_EH_FRAME support)
5847 gcc_cv_ld_eh_frame_hdr=no
5848 if test $in_tree_ld = yes ; then
5849   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 12 -o "$gcc_cv_gld_major_version" -gt 2 \
5850      && test $in_tree_ld_is_elf = yes; then
5851     gcc_cv_ld_eh_frame_hdr=yes
5852   fi
5853 elif test x$gcc_cv_ld != x; then
5854   if echo "$ld_ver" | grep GNU > /dev/null; then
5855     # Check if linker supports --eh-frame-hdr option
5856     if $gcc_cv_ld --help 2>&1 | grep eh-frame-hdr > /dev/null; then
5857       gcc_cv_ld_eh_frame_hdr=yes
5858     fi
5859   else
5860     case "$target" in
5861       *-*-solaris2*)
5862         # Sun ld has various bugs in .eh_frame_hdr support before version 1.2251.
5863         if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 2251; then
5864           gcc_cv_ld_eh_frame_hdr=yes
5865         fi
5866         ;;
5867     esac
5868   fi
5869 fi
5870 GCC_TARGET_TEMPLATE([HAVE_LD_EH_FRAME_HDR])
5871 if test x"$gcc_cv_ld_eh_frame_hdr" = xyes; then
5872         AC_DEFINE(HAVE_LD_EH_FRAME_HDR, 1,
5873 [Define if your linker supports .eh_frame_hdr.])
5874 fi
5875 AC_MSG_RESULT($gcc_cv_ld_eh_frame_hdr)
5876
5877 AC_MSG_CHECKING(linker CIEv3 in .eh_frame support)
5878 gcc_cv_ld_eh_frame_ciev3=no
5879 if test $in_tree_ld = yes ; then
5880   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
5881      && test $in_tree_ld_is_elf = yes; then
5882     gcc_cv_ld_eh_frame_ciev3=yes
5883   fi
5884 elif test x$gcc_cv_ld != x; then
5885   if echo "$ld_ver" | grep GNU > /dev/null; then
5886     gcc_cv_ld_eh_frame_ciev3=yes
5887     if test 0"$ld_date" -lt 20040513; then
5888       if test -n "$ld_date"; then
5889         # If there was date string, but was earlier than 2004-05-13, fail
5890         gcc_cv_ld_eh_frame_ciev3=no
5891       elif test "$ld_vers_major" -lt 2; then
5892         gcc_cv_ld_eh_frame_ciev3=no
5893       elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
5894         gcc_cv_ld_eh_frame_ciev3=no
5895       fi
5896     fi
5897   else
5898     case "$target" in
5899       *-*-solaris2*)
5900         # Sun ld added support for CIE v3 in .eh_frame in Solaris 11.1.
5901         if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 2324; then
5902           gcc_cv_ld_eh_frame_ciev3=yes
5903         fi
5904         ;;
5905     esac
5906   fi
5907 fi
5908 AC_DEFINE_UNQUOTED(HAVE_LD_EH_FRAME_CIEV3,
5909   [`if test x"$gcc_cv_ld_eh_frame_ciev3" = xyes; then echo 1; else echo 0; fi`],
5910   [Define 0/1 if your linker supports CIE v3 in .eh_frame.])
5911 AC_MSG_RESULT($gcc_cv_ld_eh_frame_ciev3)
5912
5913 AC_MSG_CHECKING(linker position independent executable support)
5914 gcc_cv_ld_pie=no
5915 if test $in_tree_ld = yes ; then
5916   case "$target" in
5917     # Full PIE support on Solaris was only introduced in gld 2.26.
5918     *-*-solaris2*)  gcc_gld_pie_min_version=26 ;;
5919     *)              gcc_gld_pie_min_version=15 ;;
5920   esac
5921   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge "$gcc_gld_pie_min_version" -o "$gcc_cv_gld_major_version" -gt 2 \
5922      && test $in_tree_ld_is_elf = yes; then
5923     gcc_cv_ld_pie=yes
5924   fi
5925 elif test x$gcc_cv_ld != x; then
5926   # Check if linker supports -pie option
5927   if $gcc_cv_ld --help 2>&1 | grep -- -pie > /dev/null; then
5928     gcc_cv_ld_pie=yes
5929     case "$target" in
5930       *-*-solaris2*)
5931         if echo "$ld_ver" | grep GNU > /dev/null \
5932           && test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 26; then
5933           gcc_cv_ld_pie=no
5934         fi
5935         ;;
5936     esac
5937   else
5938     case "$target" in
5939       *-*-solaris2.1[[1-9]]*)
5940         # Solaris 11.3 added PIE support.
5941         if $gcc_cv_ld -z help 2>&1 | grep -- type.*pie > /dev/null; then
5942           gcc_cv_ld_pie=yes
5943         fi
5944         ;;
5945     esac
5946   fi
5947 fi
5948 if test x"$gcc_cv_ld_pie" = xyes; then
5949         AC_DEFINE(HAVE_LD_PIE, 1,
5950 [Define if your linker supports PIE option.])
5951 fi
5952 AC_MSG_RESULT($gcc_cv_ld_pie)
5953
5954 AC_MSG_CHECKING(linker PIE support with copy reloc)
5955 gcc_cv_ld_pie_copyreloc=no
5956 if test $gcc_cv_ld_pie = yes ; then
5957   if test $in_tree_ld = yes ; then
5958     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 25 -o "$gcc_cv_gld_major_version" -gt 2; then
5959       gcc_cv_ld_pie_copyreloc=yes
5960     fi
5961   elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
5962     # Check if linker supports -pie option with copy reloc
5963     case "$target" in
5964     i?86-*-linux* | x86_64-*-linux*)
5965       cat > conftest1.s <<EOF
5966         .globl  a_glob
5967         .data
5968         .type   a_glob, @object
5969         .size   a_glob, 4
5970 a_glob:
5971         .long   2
5972 EOF
5973       cat > conftest2.s <<EOF
5974         .text
5975         .globl  main
5976         .type   main, @function
5977 main:
5978         movl    %eax, a_glob(%rip)
5979         .size   main, .-main
5980         .globl  ptr
5981         .section        .data.rel,"aw",@progbits
5982         .type   ptr, @object
5983 ptr:
5984         .quad   a_glob
5985 EOF
5986       if $gcc_cv_as --64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
5987          && $gcc_cv_ld -shared -melf_x86_64 -o conftest1.so conftest1.o > /dev/null 2>&1 \
5988          && $gcc_cv_as --64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
5989          && $gcc_cv_ld -pie -melf_x86_64 -o conftest conftest2.o conftest1.so > /dev/null 2>&1; then
5990         gcc_cv_ld_pie_copyreloc=yes
5991       fi
5992       rm -f conftest conftest1.so conftest1.o conftest2.o conftest1.s conftest2.s
5993       ;;
5994     esac
5995   fi
5996 fi
5997 AC_DEFINE_UNQUOTED(HAVE_LD_PIE_COPYRELOC,
5998   [`if test x"$gcc_cv_ld_pie_copyreloc" = xyes; then echo 1; else echo 0; fi`],
5999   [Define 0/1 if your linker supports -pie option with copy reloc.])
6000 AC_MSG_RESULT($gcc_cv_ld_pie_copyreloc)
6001
6002 AC_MSG_CHECKING(linker EH-compatible garbage collection of sections)
6003 gcc_cv_ld_eh_gc_sections=no
6004 if test $in_tree_ld = yes ; then
6005   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 17 -o "$gcc_cv_gld_major_version" -gt 2 \
6006      && test $in_tree_ld_is_elf = yes; then
6007     gcc_cv_ld_eh_gc_sections=yes
6008   fi
6009 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
6010   cat > conftest.s <<EOF
6011         .section        .text
6012 .globl _start
6013         .type _start, @function
6014 _start:
6015         .long foo
6016         .size _start, .-_start
6017         .section        .text.foo,"ax",@progbits
6018         .type foo, @function
6019 foo:
6020         .long 0
6021         .size foo, .-foo
6022         .section        .gcc_except_table.foo,"a",@progbits
6023 .L0:
6024         .long 0
6025         .section        .eh_frame,"a",@progbits
6026         .long .L0
6027 EOF
6028   if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
6029     if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
6030          | grep "gc-sections option ignored" > /dev/null; then
6031       gcc_cv_ld_eh_gc_sections=no
6032     elif $gcc_cv_objdump -h conftest 2> /dev/null \
6033          | grep gcc_except_table > /dev/null; then
6034       gcc_cv_ld_eh_gc_sections=yes
6035       # If no COMDAT groups, the compiler will emit .gnu.linkonce.t. sections.
6036       if test x$gcc_cv_as_comdat_group != xyes; then
6037         gcc_cv_ld_eh_gc_sections=no
6038         cat > conftest.s <<EOF
6039         .section        .text
6040 .globl _start
6041         .type _start, @function
6042 _start:
6043         .long foo
6044         .size _start, .-_start
6045         .section        .gnu.linkonce.t.foo,"ax",@progbits
6046         .type foo, @function
6047 foo:
6048         .long 0
6049         .size foo, .-foo
6050         .section        .gcc_except_table.foo,"a",@progbits
6051 .L0:
6052         .long 0
6053         .section        .eh_frame,"a",@progbits
6054         .long .L0
6055 EOF
6056         if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
6057           if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
6058                | grep "gc-sections option ignored" > /dev/null; then
6059             gcc_cv_ld_eh_gc_sections=no
6060           elif $gcc_cv_objdump -h conftest 2> /dev/null \
6061                | grep gcc_except_table > /dev/null; then
6062             gcc_cv_ld_eh_gc_sections=yes
6063           fi
6064         fi
6065       fi
6066     fi
6067   fi
6068   rm -f conftest.s conftest.o conftest
6069 fi
6070 case "$target" in
6071   hppa*-*-linux*)
6072     # ??? This apparently exposes a binutils bug with PC-relative relocations.
6073     gcc_cv_ld_eh_gc_sections=no
6074     ;;
6075 esac
6076 if test x$gcc_cv_ld_eh_gc_sections = xyes; then
6077         AC_DEFINE(HAVE_LD_EH_GC_SECTIONS, 1,
6078   [Define if your linker supports garbage collection of
6079    sections in presence of EH frames.])
6080 fi
6081 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections)
6082
6083 AC_MSG_CHECKING(linker EH garbage collection of sections bug)
6084 gcc_cv_ld_eh_gc_sections_bug=no
6085 if test $in_tree_ld = yes ; then
6086   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -lt 19 -o "$gcc_cv_gld_major_version" -lt 2 \
6087      && test $in_tree_ld_is_elf = yes; then
6088     gcc_cv_ld_eh_gc_sections_bug=yes
6089   fi
6090 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x -a x$gcc_cv_as_comdat_group = xyes; then
6091   gcc_cv_ld_eh_gc_sections_bug=yes
6092   cat > conftest.s <<EOF
6093         .section        .text
6094 .globl _start
6095         .type _start, @function
6096 _start:
6097         .long foo
6098         .size _start, .-_start
6099         .section        .text.startup.foo,"ax",@progbits
6100         .type foo, @function
6101 foo:
6102         .long 0
6103         .size foo, .-foo
6104         .section        .gcc_except_table.foo,"a",@progbits
6105 .L0:
6106         .long 0
6107         .section        .eh_frame,"a",@progbits
6108         .long .L0
6109 EOF
6110   if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
6111     if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
6112          | grep "gc-sections option ignored" > /dev/null; then
6113       :
6114     elif $gcc_cv_objdump -h conftest 2> /dev/null \
6115          | grep gcc_except_table > /dev/null; then
6116       gcc_cv_ld_eh_gc_sections_bug=no
6117     fi
6118   fi
6119   rm -f conftest.s conftest.o conftest
6120 fi
6121 if test x$gcc_cv_ld_eh_gc_sections_bug = xyes; then
6122         AC_DEFINE(HAVE_LD_EH_GC_SECTIONS_BUG, 1,
6123   [Define if your linker has buggy garbage collection of
6124    sections support when .text.startup.foo like sections are used.])
6125 fi
6126 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections_bug)
6127
6128 AC_MSG_CHECKING(linker for compressed debug sections)
6129 # gold/gld support compressed debug sections since binutils 2.19/2.21
6130 # In binutils 2.26, gld gained support for the ELF gABI format.
6131 if test $in_tree_ld = yes ; then
6132   gcc_cv_ld_compress_debug=0
6133   if test $ld_is_mold = yes; then
6134     gcc_cv_ld_compress_debug=3
6135     gcc_cv_ld_compress_debug_option="--compress-debug-sections"
6136   elif test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 19 -o "$gcc_cv_gld_major_version" -gt 2 \
6137      && test $in_tree_ld_is_elf = yes && test $ld_is_gold = yes; then
6138     gcc_cv_ld_compress_debug=2
6139     gcc_cv_ld_compress_debug_option="--compress-debug-sections"
6140   elif test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 26 -o "$gcc_cv_gld_major_version" -gt 2 \
6141      && test $in_tree_ld_is_elf = yes && test $ld_is_gold = no; then
6142     gcc_cv_ld_compress_debug=3
6143     gcc_cv_ld_compress_debug_option="--compress-debug-sections"
6144   elif test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2 \
6145      && test $in_tree_ld_is_elf = yes; then
6146     gcc_cv_ld_compress_debug=1
6147   fi
6148 elif echo "$ld_ver" | grep GNU > /dev/null; then
6149   if test $ld_is_mold = yes; then
6150     gcc_cv_ld_compress_debug=3
6151     gcc_cv_ld_compress_debug_option="--compress-debug-sections"
6152   elif test "$ld_vers_major" -lt 2 \
6153      || test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 21; then
6154     gcc_cv_ld_compress_debug=0
6155   elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 26; then
6156     gcc_cv_ld_compress_debug=1
6157   else
6158     gcc_cv_ld_compress_debug=3
6159     gcc_cv_ld_compress_debug_option="--compress-debug-sections"
6160   fi
6161   if test $ld_is_gold = yes; then
6162     gcc_cv_ld_compress_debug=2
6163     gcc_cv_ld_compress_debug_option="--compress-debug-sections"
6164   fi
6165 else
6166 changequote(,)dnl
6167   case "${target}" in
6168     *-*-solaris2*)
6169       # Introduced in Solaris 11.2.
6170       if $gcc_cv_ld --help 2>&1 | grep -- '-z compress-sections' > /dev/null; then
6171         gcc_cv_ld_compress_debug=3
6172         gcc_cv_ld_compress_debug_option="-z compress-sections"
6173       else
6174         gcc_cv_ld_compress_debug=0
6175       fi
6176       ;;
6177     *)
6178       # Assume linkers other than GNU ld don't support compessed debug
6179       # sections.
6180       gcc_cv_ld_compress_debug=0
6181       ;;
6182   esac
6183 changequote([,])dnl
6184 fi
6185 AC_DEFINE_UNQUOTED(HAVE_LD_COMPRESS_DEBUG, $gcc_cv_ld_compress_debug,
6186 [Define to the level of your linker's compressed debug section support.])
6187 AC_DEFINE_UNQUOTED(LD_COMPRESS_DEBUG_OPTION, "$gcc_cv_ld_compress_debug_option",
6188 [Define to the linker option to enable compressed debug sections.])
6189 AC_MSG_RESULT($gcc_cv_ld_compress_debug)
6190
6191 if test x"$ld64_flag" = x"yes"; then
6192
6193   # Set defaults for possibly untestable items.
6194   gcc_cv_ld64_export_dynamic=0
6195   gcc_cv_ld64_platform_version=0
6196
6197   if test "$build" = "$host"; then
6198     darwin_try_test=1
6199   else
6200     darwin_try_test=0
6201   fi
6202
6203   # On Darwin, because of FAT library support, it is often possible to execute
6204   # exes from compatible archs even when the host differs from the build system.
6205   case "$build","$host" in
6206     x86_64-*-darwin*,i?86-*-darwin* | powerpc64*-*-darwin*,powerpc*-*-darwin*)
6207         darwin_try_test=1;;
6208     *) ;;
6209   esac
6210
6211   # If the configurer specified a minimum ld64 version to be supported, then use
6212   # that to determine feature support.
6213   if test x"${gcc_cv_ld64_version}" != x; then
6214     AC_MSG_CHECKING(ld64 specified version)
6215     gcc_cv_ld64_major=`echo "$gcc_cv_ld64_version" | sed -e 's/\..*//'`
6216     AC_MSG_RESULT($gcc_cv_ld64_major)
6217     if test "$gcc_cv_ld64_major" -ge 236; then
6218       gcc_cv_ld64_export_dynamic=1
6219     fi
6220     if test "$gcc_cv_ld64_major" -ge 512; then
6221       gcc_cv_ld64_platform_version=1
6222     fi
6223   elif test -x "$gcc_cv_ld" -a "$darwin_try_test" -eq 1; then
6224     # If the version was not specified, try to find it.
6225     AC_MSG_CHECKING(linker version)
6226     if test x"${gcc_cv_ld64_version}" = x; then
6227       gcc_cv_ld64_version=`$gcc_cv_ld -v 2>&1 | grep ld64 | sed s/.*ld64-// | awk '{print $1}'`
6228     fi
6229     AC_MSG_RESULT($gcc_cv_ld64_version)
6230
6231     AC_MSG_CHECKING(linker for -export_dynamic support)
6232     gcc_cv_ld64_export_dynamic=1
6233     if $gcc_cv_ld -export_dynamic < /dev/null 2>&1 | grep 'unknown option' > /dev/null; then
6234       gcc_cv_ld64_export_dynamic=0
6235     fi
6236     AC_MSG_RESULT($gcc_cv_ld64_export_dynamic)
6237
6238     AC_MSG_CHECKING(linker for -platform_version support)
6239     gcc_cv_ld64_platform_version=1
6240     if $gcc_cv_ld -platform_version macos 10.5 0.0 < /dev/null 2>&1 | grep 'unknown option' > /dev/null; then
6241       gcc_cv_ld64_platform_version=0
6242     fi
6243     AC_MSG_RESULT($gcc_cv_ld64_platform_version)
6244   fi
6245
6246   if test x"${gcc_cv_ld64_version}" != x; then
6247     AC_DEFINE_UNQUOTED(LD64_VERSION, "${gcc_cv_ld64_version}",
6248       [Define to ld64 version.])
6249   fi
6250
6251   AC_DEFINE_UNQUOTED(LD64_HAS_EXPORT_DYNAMIC, $gcc_cv_ld64_export_dynamic,
6252   [Define to 1 if ld64 supports '-export_dynamic'.])
6253
6254   AC_DEFINE_UNQUOTED(LD64_HAS_PLATFORM_VERSION, $gcc_cv_ld64_platform_version,
6255   [Define to 1 if ld64 supports '-platform_version'.])
6256 fi
6257
6258 if test x"$dsymutil_flag" = x"yes"; then
6259
6260     # If the user specified a dsymutil path, then we will already have the
6261     # version string, otherwise, pick it up.
6262     if test x"$gcc_cv_dsymutil" = x; then
6263         AC_MSG_WARN([dsymutil is a required tool for this system, but not found])
6264         dsymutil_vers="tool unspecified"
6265     elif test x"$dsymutil_vers" = x; then
6266         dsymutil_vers=`$gcc_cv_dsymutil -v /dev/null 2>&1`
6267     fi
6268
6269     dsymutil_temp=`echo $dsymutil_vers | sed 1q`
6270     AC_MSG_CHECKING(dsymutil version "$dsymutil_temp")
6271     if echo $dsymutil_temp | grep dwarfutils- > /dev/null; then
6272       dsymutil_kind=DWARFUTILS
6273       dsymutil_vers=`echo $dsymutil_temp | sed 's/.*dwarfutils-\([[0-9\.]]*\).*/\1/'`
6274     elif echo $dsymutil_temp | grep clang- > /dev/null; then
6275       dsymutil_kind=CLANG
6276       dsymutil_vers=`echo $dsymutil_temp | sed 's/.*clang-\([[0-9\.]]*\).*/\1/'`
6277     elif echo $dsymutil_temp | grep 'LLVM version ' > /dev/null; then
6278       dsymutil_kind=LLVM
6279       dsymutil_vers=`echo $dsymutil_temp | sed 's/.*LLVM\ version\ \([[0-9\.]]*\).*/\1/'`
6280     else
6281       dsymutil_kind=UNKNOWN
6282       dsymutil_vers="0.0"
6283     fi
6284     dsymutil_major=`expr "$dsymutil_vers" : '\([[0-9]]*\)'`
6285     dsymutil_minor=`expr "$dsymutil_vers" : '[[0-9]]*\.\([[0-9]]*\)'`
6286     dsymutil_tiny=`expr "$dsymutil_vers" : '[[0-9]]*\.[[0-9]]*\.\([[0-9]]*\)'`
6287     if test x"${dsymutil_minor}" = x; then
6288       dsymutil_minor=0
6289     fi
6290     if test x"${dsymutil_tiny}" = x; then
6291       dsymutil_tiny=0
6292     fi
6293     AC_DEFINE_UNQUOTED(DSYMUTIL_VERSION, [$dsymutil_kind,${dsymutil_major},${dsymutil_minor},${dsymutil_tiny}],
6294         [Define to the dsymutil version.])
6295     AC_MSG_RESULT($dsymutil_vers : $dsymutil_kind ${dsymutil_major} ${dsymutil_minor} ${dsymutil_tiny} )
6296 fi
6297
6298 case $target_os in
6299   win32 | pe | cygwin* | mingw32*)
6300     AC_MSG_CHECKING(broken PE linker dwarf5 support)
6301     gcc_cv_ld_broken_pe_dwarf5=yes
6302     if test $in_tree_ld = yes ; then
6303       if grep -q '\.debug_loclists.*BLOCK.*__section_alignment__.*NOLOAD.*:' \
6304            $gcc_cv_ld_gld_srcdir/scripttempl/pe*.sc \
6305          && grep -q '\.debug_rnglists.*BLOCK.*__section_alignment__.*NOLOAD.*:' \
6306               $gcc_cv_ld_gld_srcdir/scripttempl/pe*.sc; then
6307         gcc_cv_ld_broken_pe_dwarf5=no
6308       fi
6309     else
6310       if $gcc_cv_ld --verbose 2>&1 | grep -q '\.debug_loclists.*BLOCK.*__section_alignment__.*NOLOAD.*:' \
6311          && $gcc_cv_ld --verbose 2>&1 | grep -q '\.debug_rnglists.*BLOCK.*__section_alignment__.*NOLOAD.*:'; then
6312         gcc_cv_ld_broken_pe_dwarf5=no
6313       fi
6314     fi
6315     if test x$gcc_cv_ld_broken_pe_dwarf5 = xyes; then
6316       AC_DEFINE(HAVE_LD_BROKEN_PE_DWARF5, 1,
6317                 [Define if the PE linker has broken DWARF 5 support.])
6318     fi
6319     AC_MSG_RESULT($gcc_cv_ld_broken_pe_dwarf5)
6320
6321     AC_MSG_CHECKING(PE linker --disable-dynamicbase support)
6322     gcc_cv_ld_disable_dynamicbase=no
6323     if test $in_tree_ld = yes; then
6324       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 36 -o "$gcc_cv_gld_major_version" -gt 2; then \
6325         gcc_cv_ld_disable_dynamicbase=yes
6326       fi
6327     else
6328       if $gcc_cv_ld --help 2>&1 | grep -q 'disable\-]dynamicbase' > /dev/null; then
6329         gcc_cv_ld_disable_dynamicbase=yes
6330       fi
6331     fi
6332     if test x"$gcc_cv_ld_disable_dynamicbase" = xyes; then
6333       AC_DEFINE(HAVE_LD_PE_DISABLE_DYNAMICBASE, 1,
6334                 [Define if the PE linker supports --disable-dynamicbase option.])
6335     fi
6336     AC_MSG_RESULT($gcc_cv_ld_disable_dynamicbase)
6337     ;;
6338 esac
6339
6340 # --------
6341 # UNSORTED
6342 # --------
6343
6344 AC_CACHE_CHECK(linker --as-needed support,
6345 gcc_cv_ld_as_needed,
6346 [gcc_cv_ld_as_needed=no
6347 gcc_cv_ld_as_needed_option='--as-needed'
6348 gcc_cv_ld_no_as_needed_option='--no-as-needed'
6349 if test $in_tree_ld = yes ; then
6350   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
6351      && test $in_tree_ld_is_elf = yes; then
6352     gcc_cv_ld_as_needed=yes
6353     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 28; then
6354       gcc_cv_ld_as_needed_option='--push-state --as-needed'
6355       gcc_cv_ld_no_as_needed_option='--pop-state'
6356     fi
6357   fi
6358 elif test x$gcc_cv_ld != x; then
6359   # Check if linker supports --as-needed and --no-as-needed options
6360   if $gcc_cv_ld --help 2>&1 | grep as-needed > /dev/null; then
6361     gcc_cv_ld_as_needed=yes
6362     if $gcc_cv_ld --help 2>&1 | grep push-state > /dev/null \
6363        && $gcc_cv_ld --help 2>&1 | grep pop-state > /dev/null \
6364        && echo "$ld_ver" | grep GNU > /dev/null \
6365        && test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -ge 28; then
6366       # Use these options only when both ld.bfd and ld.gold support
6367       # --push-state/--pop-state, which unfortunately wasn't added
6368       # at the same time.
6369       gcc_cv_ld_as_needed_option='--push-state --as-needed'
6370       gcc_cv_ld_no_as_needed_option='--pop-state'
6371     fi
6372   fi
6373   case "$target:$gnu_ld" in
6374     *-*-solaris2*:no)
6375       # Solaris 2 ld always supports -z ignore/-z record.  Prefer the native
6376       # forms.
6377       gcc_cv_ld_as_needed=yes
6378       gcc_cv_ld_as_needed_option="-z ignore"
6379       gcc_cv_ld_no_as_needed_option="-z record"
6380       ;;
6381   esac
6382 fi
6383 # --as-needed/-z ignore can only be used if libgcc_s.so.1 uses
6384 # dl_iterate_phdr, i.e. since Solaris 11.
6385 case "$target" in
6386   *-*-solaris2.1[[1-9]]*)
6387     case "$target" in
6388     i?86-*-* | x86_64-*-*)
6389       if echo "$ld_ver" | grep GNU > /dev/null; then
6390         # Doesn't work with gld on Solaris/x86 due to PR ld/12320.
6391         gcc_cv_ld_as_needed=no
6392       fi
6393       ;;
6394     esac
6395     ;;
6396   *-*-solaris2*)
6397     gcc_cv_ld_as_needed=no
6398     ;;
6399 esac
6400 ])
6401 if test x"$gcc_cv_ld_as_needed" = xyes; then
6402         AC_DEFINE(HAVE_LD_AS_NEEDED, 1,
6403 [Define if your linker supports --as-needed/--no-as-needed or equivalent options.])
6404         AC_DEFINE_UNQUOTED(LD_AS_NEEDED_OPTION, "$gcc_cv_ld_as_needed_option",
6405 [Define to the linker option to ignore unused dependencies.])
6406         AC_DEFINE_UNQUOTED(LD_NO_AS_NEEDED_OPTION, "$gcc_cv_ld_no_as_needed_option",
6407 [Define to the linker option to keep unused dependencies.])
6408 fi
6409
6410 AC_MSG_CHECKING(linker mapfile support for clearing hardware capabilities)
6411 saved_LDFLAGS="$LDFLAGS"
6412 for clearcap_map in sol2-clearcapv2.map sol2-clearcap.map; do
6413   LDFLAGS="$saved_LDFLAGS -Wl,-M,${srcdir}/config/$clearcap_map"
6414   AC_LINK_IFELSE([AC_LANG_SOURCE([int main(void) {return 0;}])],
6415     [gcc_cv_ld_clearcap=yes; break], [gcc_cv_ld_clearcap=no])
6416 done
6417 LDFLAGS="$saved_LDFLAGS"
6418 if test "x$gcc_cv_ld_clearcap" = xyes; then
6419   AC_DEFINE([HAVE_LD_CLEARCAP], 1,
6420 [Define if the linker supports clearing hardware capabilities via mapfile.])
6421   AC_CONFIG_LINKS([clearcap.map:${srcdir}/config/$clearcap_map])
6422 fi
6423 AC_MSG_RESULT($gcc_cv_ld_clearcap)
6424
6425 case "$target" in
6426   powerpc*-*-*)
6427     case "$target" in
6428       *le-*-linux*)
6429         emul_name="-melf32lppc"
6430         ;;
6431       *)
6432         emul_name="-melf32ppc"
6433         ;;
6434     esac
6435     AC_CACHE_CHECK(linker .gnu.attributes long double support,
6436     gcc_cv_ld_ppc_attr,
6437     [gcc_cv_ld_ppc_attr=no
6438     if test x"$ld_is_gold" = xyes; then
6439       gcc_cv_ld_ppc_attr=yes
6440     elif test $in_tree_ld = yes ; then
6441       if test "$gcc_cv_gld_major_version" -eq 2 \
6442                 -a "$gcc_cv_gld_minor_version" -ge 28 \
6443                 -o "$gcc_cv_gld_major_version" -gt 2; then
6444         gcc_cv_ld_ppc_attr=yes
6445       fi
6446     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
6447       # check that merging the long double .gnu_attribute doesn't warn
6448       cat > conftest1.s <<EOF
6449         .gnu_attribute 4,1
6450 EOF
6451       cat > conftest2.s <<EOF
6452         .gnu_attribute 4,9
6453 EOF
6454       if $gcc_cv_as -a32 -o conftest1.o conftest1.s > /dev/null 2>&1 \
6455          && $gcc_cv_as -a32 -o conftest2.o conftest2.s > /dev/null 2>&1 \
6456          && $gcc_cv_ld $emul_name -r -o conftest.o conftest1.o conftest2.o > /dev/null 2> conftest.err \
6457          && test ! -s conftest.err; then
6458         gcc_cv_ld_ppc_attr=yes
6459       fi
6460       rm -f conftest.err conftest.o conftest1.o conftest2.o conftest1.s conftest2.s
6461     fi
6462     ])
6463     if test x$gcc_cv_ld_ppc_attr = xyes; then
6464       AC_DEFINE(HAVE_LD_PPC_GNU_ATTR_LONG_DOUBLE, 1,
6465     [Define if your PowerPC linker has .gnu.attributes long double support.])
6466     fi
6467     ;;
6468 esac
6469
6470 case "$target:$tm_file" in
6471   powerpc64*-*-freebsd* | powerpc64*-*-linux* | powerpc*-*-linux*rs6000/biarch64.h*)
6472   case "$target" in
6473      *le-*-linux*)
6474      emul_name="-melf64lppc"
6475       ;;
6476      *-*-linux*)
6477      emul_name="-melf64ppc"
6478       ;;
6479      *le-*-freebsd*)
6480      emul_name="-melf64lppc_fbsd"
6481       ;;
6482      *-*-freebsd*)
6483      emul_name="-melf64ppc_fbsd"
6484       ;;
6485   esac
6486     AC_CACHE_CHECK(linker support for omitting dot symbols,
6487     gcc_cv_ld_no_dot_syms,
6488     [gcc_cv_ld_no_dot_syms=no
6489     if test x"$ld_is_gold" = xyes; then
6490       gcc_cv_ld_no_dot_syms=yes
6491     elif test $in_tree_ld = yes ; then
6492       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2; then
6493         gcc_cv_ld_no_dot_syms=yes
6494       fi
6495     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
6496       cat > conftest1.s <<EOF
6497         .text
6498         bl .foo
6499 EOF
6500       cat > conftest2.s <<EOF
6501         .section ".opd","aw"
6502         .align 3
6503         .globl foo
6504         .type foo,@function
6505 foo:
6506         .quad .LEfoo,.TOC.@tocbase,0
6507         .text
6508 .LEfoo:
6509         blr
6510         .size foo,.-.LEfoo
6511 EOF
6512       if $gcc_cv_as -a64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
6513          && $gcc_cv_as -a64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
6514          && $gcc_cv_ld $emul_name -o conftest conftest1.o conftest2.o > /dev/null 2>&1; then
6515         gcc_cv_ld_no_dot_syms=yes
6516       fi
6517       rm -f conftest conftest1.o conftest2.o conftest1.s conftest2.s
6518     fi
6519     ])
6520     if test x"$gcc_cv_ld_no_dot_syms" = xyes; then
6521       AC_DEFINE(HAVE_LD_NO_DOT_SYMS, 1,
6522     [Define if your PowerPC64 linker only needs function descriptor syms.])
6523     fi
6524
6525     AC_CACHE_CHECK(linker large toc support,
6526     gcc_cv_ld_large_toc,
6527     [gcc_cv_ld_large_toc=no
6528     if test x"$ld_is_gold" = xyes; then
6529       gcc_cv_ld_large_toc=yes
6530     elif test $in_tree_ld = yes ; then
6531       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2; then
6532         gcc_cv_ld_large_toc=yes
6533       fi
6534     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
6535       cat > conftest.s <<EOF
6536         .section ".tbss","awT",@nobits
6537         .align 3
6538 ie0:    .space 8
6539         .global _start
6540         .text
6541 _start:
6542         addis 9,13,ie0@got@tprel@ha
6543         ld 9,ie0@got@tprel@l(9)
6544 EOF
6545       if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1 \
6546          && $gcc_cv_ld $emul_name --no-toc-sort -o conftest conftest.o > /dev/null 2>&1; then
6547         gcc_cv_ld_large_toc=yes
6548       fi
6549       rm -f conftest conftest.o conftest.s
6550     fi
6551     ])
6552     if test x"$gcc_cv_ld_large_toc" = xyes; then
6553       AC_DEFINE(HAVE_LD_LARGE_TOC, 1,
6554     [Define if your PowerPC64 linker supports a large TOC.])
6555     fi
6556
6557     AC_CACHE_CHECK(linker toc pointer alignment,
6558     gcc_cv_ld_toc_align,
6559     [if test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_nm != x; then
6560       cat > conftest.s <<EOF
6561         .global _start
6562         .text
6563 _start:
6564         addis 9,2,x@got@ha
6565         .section .data.rel.ro,"aw",@progbits
6566         .p2align 16
6567         .space 32768
6568 x:      .quad .TOC.
6569 EOF
6570       if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1 \
6571          && $gcc_cv_ld $emul_name -z norelro -o conftest conftest.o > /dev/null 2>&1; then
6572         gcc_cv_ld_toc_align=`$gcc_cv_nm conftest | ${AWK} '/\.TOC\./ { match ($0, "0[[[:xdigit:]]]*", a); print strtonum ("0x" substr(a[[0]], length(a[[0]])-3)) }'`
6573       fi
6574       rm -f conftest conftest.o conftest.s
6575     fi
6576     ])
6577     if test -n "$gcc_cv_ld_toc_align" && test $gcc_cv_ld_toc_align -gt 8; then
6578       AC_DEFINE_UNQUOTED(POWERPC64_TOC_POINTER_ALIGNMENT, $gcc_cv_ld_toc_align,
6579     [Define to .TOC. alignment forced by your linker.])
6580     fi
6581     ;;
6582 esac
6583
6584 case "$target" in
6585   *-*-aix*)
6586     AC_CACHE_CHECK(linker large toc support,
6587     gcc_cv_ld_large_toc,
6588     [gcc_cv_ld_large_toc=no
6589     if test x$gcc_cv_as != x ; then
6590       cat > conftest.s <<EOF
6591         .toc
6592 LC..1:
6593         .tc a[[TC]],a[[RW]]
6594         .extern a[[RW]]
6595         .csect .text[[PR]]
6596 .largetoctest:
6597         addis 9,LC..1@u(2)
6598         ld 3,LC..1@l(9)
6599 EOF
6600       if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1; then
6601         gcc_cv_ld_large_toc=yes
6602       fi
6603       rm -f conftest conftest.o conftest.s
6604     fi
6605     ])
6606     if test x"$gcc_cv_ld_large_toc" = xyes; then
6607       AC_DEFINE(HAVE_LD_LARGE_TOC, 1,
6608     [Define if your PowerPC64 linker supports a large TOC.])
6609     fi
6610     ;;
6611 esac
6612
6613 AC_CACHE_CHECK(linker --build-id support,
6614   gcc_cv_ld_buildid,
6615   [gcc_cv_ld_buildid=no
6616   if test $in_tree_ld = yes ; then
6617     if test "$gcc_cv_gld_major_version" -eq 2 -a \
6618        "$gcc_cv_gld_minor_version" -ge 18 -o \
6619        "$gcc_cv_gld_major_version" -gt 2 \
6620        && test $in_tree_ld_is_elf = yes; then
6621       gcc_cv_ld_buildid=yes
6622     fi
6623   elif test x$gcc_cv_ld != x; then
6624     if $gcc_cv_ld --help 2>&1 | grep build-id > /dev/null; then
6625       gcc_cv_ld_buildid=yes
6626     fi
6627   fi])
6628 if test x"$gcc_cv_ld_buildid" = xyes; then
6629   AC_DEFINE(HAVE_LD_BUILDID, 1,
6630   [Define if your linker supports --build-id.])
6631 fi
6632
6633 AC_ARG_ENABLE(linker-build-id,
6634 [AS_HELP_STRING([--enable-linker-build-id],
6635                 [compiler will always pass --build-id to linker])],
6636 [],
6637 enable_linker_build_id=no)
6638
6639 if test x"$enable_linker_build_id" = xyes; then
6640   if test x"$gcc_cv_ld_buildid" = xyes; then
6641     AC_DEFINE(ENABLE_LD_BUILDID, 1,
6642     [Define if gcc should always pass --build-id to linker.])
6643   else
6644     AC_MSG_WARN(--build-id is not supported by your linker; --enable-linker-build-id ignored)
6645   fi
6646 fi
6647
6648 # In binutils 2.21, GNU ld gained support for new emulations fully
6649 # supporting the Solaris 2 ABI.  Detect their presence in the linker used.
6650 AC_CACHE_CHECK(linker *_sol2 emulation support,
6651   gcc_cv_ld_sol2_emulation,
6652   [gcc_cv_ld_sol2_emulation=no
6653   if test $in_tree_ld = yes ; then
6654     if test "$gcc_cv_gld_major_version" -eq 2 -a \
6655        "$gcc_cv_gld_minor_version" -ge 21 -o \
6656        "$gcc_cv_gld_major_version" -gt 2 \
6657        && test $in_tree_ld_is_elf = yes; then
6658       gcc_cv_ld_sol2_emulation=yes
6659     fi
6660   elif test x$gcc_cv_ld != x; then
6661     if $gcc_cv_ld -V 2>/dev/null | sed -e '1,/Supported emulations/d;q' | \
6662        grep _sol2 > /dev/null; then
6663       gcc_cv_ld_sol2_emulation=yes
6664     fi
6665   fi])
6666 if test x"$gcc_cv_ld_sol2_emulation" = xyes; then
6667   AC_DEFINE(HAVE_LD_SOL2_EMULATION, 1,
6668   [Define if your linker supports the *_sol2 emulations.])
6669 fi
6670
6671 AC_CACHE_CHECK(linker --sysroot support,
6672   gcc_cv_ld_sysroot,
6673   [gcc_cv_ld_sysroot=no
6674   if test $in_tree_ld = yes ; then
6675       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 ; then
6676         gcc_cv_ld_sysroot=yes
6677       fi
6678   elif test x$gcc_cv_ld != x; then
6679     if $gcc_cv_ld --help 2>&1 | grep sysroot > /dev/null; then
6680       gcc_cv_ld_sysroot=yes
6681     fi
6682   fi])
6683 if test x"$gcc_cv_ld_sysroot" = xyes; then
6684   AC_DEFINE(HAVE_LD_SYSROOT, 1,
6685   [Define if your linker supports --sysroot.])
6686 fi
6687
6688 case $target in
6689 *-*-solaris2*)
6690   # Check for system-provided CRTs on Solaris 11.x and Solaris 12.
6691   AC_CACHE_CHECK([system-provided CRTs on Solaris],
6692     gcc_cv_solaris_crts,
6693     [gcc_cv_solaris_crts=no
6694      if test x$host != x$target; then
6695        if test "x$with_sysroot" = xyes; then
6696          target_sysroot="${test_exec_prefix}/${target_noncanonical}/sys-root"
6697        else
6698          target_sysroot="${with_sysroot}"
6699        fi
6700      fi
6701      target_libdir="$target_sysroot/usr/lib"
6702      # At the time they were added, gcrt1.o became a symlink for backwards
6703      # compatibility on x86, while crt1.o was added on sparc, so check for that.
6704      case $target in
6705        i?86-*-solaris2* | x86_64-*-solaris2*)
6706          if test -h "$target_libdir/gcrt1.o"; then gcc_cv_solaris_crts=yes; fi
6707          ;;
6708        sparc*-*-solaris2*)
6709          if test -f "$target_libdir/crt1.o"; then gcc_cv_solaris_crts=yes; fi
6710          ;;
6711      esac])
6712   ;;
6713 esac
6714 if test x$gcc_cv_solaris_crts = xyes; then
6715   AC_DEFINE(HAVE_SOLARIS_CRTS, 1,
6716             [Define if the system-provided CRTs are present on Solaris.])
6717 fi
6718
6719 AC_ARG_ENABLE(libssp,
6720 [AS_HELP_STRING([--enable-libssp], [enable linking against libssp])],
6721 [case "${enableval}" in
6722   yes|no)
6723     ;;
6724   *)
6725     AC_MSG_ERROR([unknown libssp setting $enableval])
6726     ;;
6727 esac], [])
6728
6729 # Test for stack protector support in target C library.
6730 AC_CACHE_CHECK(__stack_chk_fail in target C library,
6731   gcc_cv_libc_provides_ssp,
6732   [gcc_cv_libc_provides_ssp=no
6733   if test "x$enable_libssp" = "xno"; then
6734     gcc_cv_libc_provides_ssp=yes
6735   elif test "x$enable_libssp" = "xyes"; then
6736     gcc_cv_libc_provides_ssp=no
6737   else
6738     case "$target" in
6739        *-*-musl*)
6740          # All versions of musl provide stack protector
6741          gcc_cv_libc_provides_ssp=yes;;
6742        *-*-linux* | *-*-kfreebsd*-gnu)
6743       # glibc 2.4 and later provides __stack_chk_fail and
6744       # either __stack_chk_guard, or TLS access to stack guard canary.
6745       GCC_GLIBC_VERSION_GTE_IFELSE([2], [4], [gcc_cv_libc_provides_ssp=yes], [
6746       [if test -f $target_header_dir/features.h \
6747          && $EGREP '^[  ]*#[    ]*define[       ]+__GNU_LIBRARY__[      ]+([1-9][0-9]|[6-9])' \
6748             $target_header_dir/features.h > /dev/null; then
6749         if $EGREP '^[   ]*#[    ]*define[       ]+__UCLIBC__[   ]+1' \
6750              $target_header_dir/features.h > /dev/null && \
6751              test -f $target_header_dir/bits/uClibc_config.h && \
6752              $EGREP '^[         ]*#[    ]*define[       ]+__UCLIBC_HAS_SSP__[   ]+1' \
6753              $target_header_dir/bits/uClibc_config.h > /dev/null; then
6754           gcc_cv_libc_provides_ssp=yes
6755         fi
6756       # all versions of Bionic support stack protector
6757       elif test -f $target_header_dir/sys/cdefs.h \
6758         && $EGREP '^[  ]*#[    ]*define[       ]+__BIONIC__[   ]+1' \
6759            $target_header_dir/sys/cdefs.h > /dev/null; then
6760          gcc_cv_libc_provides_ssp=yes
6761       fi]])
6762         ;;
6763        *-*-gnu*)
6764          # Avoid complicated tests (see
6765          # <http://gcc.gnu.org/ml/gcc/2008-10/msg00130.html>) and for now
6766          # simply assert that glibc does provide this, which is true for all
6767          # realistically usable GNU/Hurd configurations.
6768          # All supported versions of musl provide it as well
6769          gcc_cv_libc_provides_ssp=yes;;
6770        *-*-darwin* | *-*-freebsd* | *-*-netbsd*)
6771          AC_CHECK_FUNC(__stack_chk_fail,[gcc_cv_libc_provides_ssp=yes],
6772            [echo "no __stack_chk_fail on this target"])
6773         ;;
6774        *) gcc_cv_libc_provides_ssp=no ;;
6775     esac
6776   fi])
6777
6778 if test x$gcc_cv_libc_provides_ssp = xyes; then
6779   AC_DEFINE(TARGET_LIBC_PROVIDES_SSP, 1,
6780             [Define if your target C library provides stack protector support])
6781 fi
6782
6783 # Check whether --enable-default-ssp was given.
6784 AC_ARG_ENABLE(default-ssp,
6785 [AS_HELP_STRING([--enable-default-ssp],
6786   [enable Stack Smashing Protection as default])],[
6787 if test x$gcc_cv_libc_provides_ssp = xyes; then
6788   case "$target" in
6789     ia64*-*-*) enable_default_ssp=no ;;
6790     *) enable_default_ssp=$enableval ;;
6791   esac
6792 else
6793   enable_default_ssp=no
6794 fi],
6795 enable_default_ssp=no)
6796 if test x$enable_default_ssp = xyes ; then
6797   AC_DEFINE(ENABLE_DEFAULT_SSP, 1,
6798       [Define if your target supports default stack protector and it is enabled.])
6799 fi
6800 AC_SUBST([enable_default_ssp])
6801
6802 # Test for <sys/sdt.h> on the target.
6803 GCC_TARGET_TEMPLATE([HAVE_SYS_SDT_H])
6804 AC_MSG_CHECKING(sys/sdt.h in the target C library)
6805 have_sys_sdt_h=no
6806 if test -f $target_header_dir/sys/sdt.h; then
6807   have_sys_sdt_h=yes
6808   AC_DEFINE(HAVE_SYS_SDT_H, 1,
6809             [Define if your target C library provides sys/sdt.h])
6810 fi
6811 AC_MSG_RESULT($have_sys_sdt_h)
6812
6813 # Check if TFmode long double should be used by default or not.
6814 # Some glibc targets used DFmode long double, but with glibc 2.4
6815 # and later they can use TFmode.
6816 case "$target" in
6817   powerpc*-*-linux* | \
6818   sparc*-*-linux* | \
6819   s390*-*-linux* | \
6820   alpha*-*-linux*)
6821     AC_ARG_WITH(long-double-128,
6822       [AS_HELP_STRING([--with-long-double-128],
6823                       [use 128-bit long double by default])],
6824       gcc_cv_target_ldbl128="$with_long_double_128", [
6825       case "$target" in
6826         s390*-*-linux-musl*)
6827           gcc_cv_target_ldbl128=yes
6828           ;;
6829         powerpc*-*-linux-musl*)
6830           gcc_cv_target_ldbl128=no
6831           ;;
6832         *)]
6833       [GCC_GLIBC_VERSION_GTE_IFELSE([2], [4], [gcc_cv_target_ldbl128=yes], [
6834       [gcc_cv_target_ldbl128=no
6835       grep '^[  ]*#[    ]*define[       ][      ]*__LONG_DOUBLE_MATH_OPTIONAL' \
6836         $target_header_dir/bits/wordsize.h > /dev/null 2>&1 \
6837       && gcc_cv_target_ldbl128=yes
6838       ]])]
6839       [
6840           ;;
6841       esac
6842       ])
6843     ;;
6844 esac
6845 if test x$gcc_cv_target_ldbl128 = xyes; then
6846   AC_DEFINE(TARGET_DEFAULT_LONG_DOUBLE_128, 1,
6847             [Define if TFmode long double should be the default])
6848 fi
6849
6850 # Check if TFmode long double target should use the IBM extended double or IEEE
6851 # 128-bit floating point formats if long doubles are 128-bits long.  The long
6852 # double type can only be switched on powerpc64 bit Linux systems where VSX is
6853 # supported.  Other PowerPC systems do not build the IEEE 128-bit emulator in
6854 # libgcc.
6855 AC_ARG_WITH([long-double-format],
6856   [AS_HELP_STRING([--with-long-double-format={ieee,ibm}]
6857                   [Specify whether PowerPC long double uses IEEE or IBM format])],[
6858 case "$target:$with_long_double_format" in
6859   powerpc64le-*-linux*:ieee | powerpc64le-*-linux*:ibm)
6860     :
6861     ;;
6862   powerpc64-*-linux*:ieee | powerpc64-*-linux*:ibm)
6863     # IEEE 128-bit emulation is only built on 64-bit VSX Linux systems
6864     case "$with_cpu" in
6865       power7 | power8 | power9 | power1*)
6866         :
6867         ;;
6868       *)
6869         AC_MSG_ERROR([Configuration option --with-long-double-format is only \
6870 supported if the default cpu is power7 or newer])
6871         with_long_double_format=""
6872         ;;
6873       esac
6874       ;;
6875   powerpc64*-*-linux*:*)
6876     AC_MSG_ERROR([--with-long-double-format argument should be ibm or ieee])
6877     with_long_double_format=""
6878     ;;
6879   *)
6880     AC_MSG_ERROR([Configure option --with-long-double-format is only supported \
6881 on 64-bit PowerPC VSX Linux systems])
6882     with_long_double_format=""
6883     ;;
6884 esac],
6885   [])
6886
6887 # Check if the target LIBC supports exporting the AT_PLATFORM and AT_HWCAP
6888 # values in the TCB.  Currently, only GLIBC 2.23 and later support this.
6889 gcc_cv_libc_provides_hwcap_in_tcb=no
6890 case "$target" in
6891   powerpc*-*-linux*)
6892     GCC_GLIBC_VERSION_GTE_IFELSE([2], [23], [gcc_cv_libc_provides_hwcap_in_tcb=yes], )
6893     ;;
6894 esac
6895 if test x$gcc_cv_libc_provides_hwcap_in_tcb = xyes; then
6896   AC_DEFINE(TARGET_LIBC_PROVIDES_HWCAP_IN_TCB, 1,
6897             [Define if your target C Library provides the AT_HWCAP value in the TCB])
6898 fi
6899
6900 # Check if the target LIBC handles PT_GNU_STACK.
6901 gcc_cv_libc_gnustack=unknown
6902 case "$target" in
6903   mips*-*-linux-musl*)
6904     gcc_cv_libc_gnustack=yes
6905     ;;
6906   mips*-*-linux*)
6907     GCC_GLIBC_VERSION_GTE_IFELSE([2], [31], [gcc_cv_libc_gnustack=yes], )
6908     ;;
6909 esac
6910 if test x$gcc_cv_libc_gnustack = xyes; then
6911   AC_DEFINE(TARGET_LIBC_GNUSTACK, 1,
6912             [Define if your target C Library properly handles PT_GNU_STACK])
6913 fi
6914
6915 AC_MSG_CHECKING(dl_iterate_phdr in target C library)
6916 gcc_cv_target_dl_iterate_phdr=unknown
6917 case "$target" in
6918   *-*-solaris2*)
6919     # <link.h> needs both a dl_iterate_phdr declaration and support for
6920     # compilation with largefile support.
6921     if grep dl_iterate_phdr $target_header_dir/link.h > /dev/null 2>&1 \
6922       && grep 'large file capable' $target_header_dir/link.h > /dev/null 2>&1; then
6923       gcc_cv_target_dl_iterate_phdr=yes
6924     else
6925       gcc_cv_target_dl_iterate_phdr=no
6926     fi
6927     ;;
6928   *-*-dragonfly* | *-*-freebsd*)
6929     if grep dl_iterate_phdr $target_header_dir/sys/link_elf.h > /dev/null 2>&1; then
6930       gcc_cv_target_dl_iterate_phdr=yes
6931     else
6932       gcc_cv_target_dl_iterate_phdr=no
6933     fi
6934     ;;
6935   *-linux-musl*)
6936     gcc_cv_target_dl_iterate_phdr=yes
6937     ;;
6938 esac
6939 GCC_TARGET_TEMPLATE([TARGET_DL_ITERATE_PHDR])
6940 if test x$gcc_cv_target_dl_iterate_phdr = xyes; then
6941    AC_DEFINE(TARGET_DL_ITERATE_PHDR, 1,
6942 [Define if your target C library provides the `dl_iterate_phdr' function.])
6943 fi
6944 AC_MSG_RESULT($gcc_cv_target_dl_iterate_phdr)
6945
6946 # We no longer support different GC mechanisms.  Emit an error if
6947 # the user configures with --with-gc.
6948 AC_ARG_WITH(gc,
6949 [AS_HELP_STRING([--with-gc={page,zone}],
6950                 [this option is not supported anymore.  It used to choose
6951                  the garbage collection mechanism to use with the compiler])],
6952 [AC_MSG_ERROR([Configure option --with-gc is only supported up to GCC 4.7.x])],
6953 [])
6954
6955 # Libraries to use on the host.  This will normally be set by the top
6956 # level Makefile.  Here we simply capture the value for our Makefile.
6957 if test -z "${HOST_LIBS+set}"; then
6958   HOST_LIBS=
6959 fi
6960 AC_SUBST(HOST_LIBS)
6961
6962 # Use the system's zlib library.
6963 AM_ZLIB
6964
6965 dnl Very limited version of automake's enable-maintainer-mode
6966
6967 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
6968   dnl maintainer-mode is disabled by default
6969   AC_ARG_ENABLE(maintainer-mode,
6970 [AS_HELP_STRING([--enable-maintainer-mode],
6971                 [enable make rules and dependencies not useful
6972                  (and sometimes confusing) to the casual installer])],
6973       maintainer_mode=$enableval,
6974       maintainer_mode=no)
6975
6976 AC_MSG_RESULT($maintainer_mode)
6977
6978 if test "$maintainer_mode" = "yes"; then
6979   MAINT=''
6980 else
6981   MAINT='#'
6982 fi
6983 AC_SUBST(MAINT)dnl
6984
6985 dnl Variables for tags utilities; copied from automake 1.16.4+'s init.m4
6986 if test -z "$CTAGS"; then
6987   CTAGS=ctags
6988 fi
6989 AC_SUBST([CTAGS])
6990 if test -z "$ETAGS"; then
6991   ETAGS=etags
6992 fi
6993 AC_SUBST([ETAGS])
6994 if test -z "$CSCOPE"; then
6995   CSCOPE=cscope
6996 fi
6997 AC_SUBST([CSCOPE])
6998
6999 dnl Whether to prevent multiple front-ends from linking at the same time
7000
7001 AC_MSG_CHECKING([whether to avoid linking multiple front-ends at once])
7002   AC_ARG_ENABLE(link-mutex,
7003 [AS_HELP_STRING([--enable-link-mutex],
7004                 [avoid linking multiple front-ends at once to avoid thrashing
7005                  on the build machine])],
7006       do_link_mutex=$enableval,
7007       do_link_mutex=no)
7008 AC_MSG_RESULT($do_link_mutex)
7009
7010 if test "$do_link_mutex" = "yes"; then
7011    DO_LINK_MUTEX=true
7012 else
7013    DO_LINK_MUTEX=false
7014 fi
7015 AC_SUBST(DO_LINK_MUTEX)
7016
7017 dnl Whether to prevent multiple GCC front-ends from linking at the same time
7018
7019 AC_MSG_CHECKING([whether to serialize linking of multiple front-ends])
7020   AC_ARG_ENABLE(link-serialization,
7021 [AS_HELP_STRING([--enable-link-serialization],
7022                 [avoid linking multiple GCC front-ends at once using make
7023                  dependencies to avoid thrashing on the build machine])],
7024       do_link_serialization=$enableval,
7025       do_link_serialization=no)
7026 AC_MSG_RESULT($do_link_serialization)
7027
7028 case "$do_link_serialization" in
7029   yes)
7030     DO_LINK_SERIALIZATION=1;;
7031   [[1-9]] | [[1-9]][[0-9]] | [[1-9]][[0-9]][[0-9]])
7032     DO_LINK_SERIALIZATION=$do_link_serialization;;
7033   no)
7034     DO_LINK_SERIALIZATION=;;
7035   *)
7036     AC_MSG_ERROR(bad value ${do_link_serialization} given for --enable-link-serialization) ;;
7037 esac
7038 AC_SUBST(DO_LINK_SERIALIZATION)
7039
7040 # --------------
7041 # Language hooks
7042 # --------------
7043
7044 # Make empty files to contain the specs and options for each language.
7045 # Then add #include lines to for a compiler that has specs and/or options.
7046
7047 subdirs=
7048 lang_opt_files=
7049 lang_specs_files=
7050 lang_tree_files=
7051 # These (without "all_") are set in each config-lang.in.
7052 # `language' must be a single word so is spelled singularly.
7053 all_languages=
7054 all_compilers=
7055 all_outputs='Makefile'
7056 # List of language configure and makefile fragments.
7057 all_lang_configurefrags=
7058 all_lang_makefrags=
7059 # Additional files for gengtype
7060 all_gtfiles="$target_gtfiles"
7061
7062 # These are the languages that are set in --enable-languages,
7063 # and are available in the GCC tree.
7064 all_selected_languages=
7065
7066 # Add the language fragments.
7067 # Languages are added via two mechanisms.  Some information must be
7068 # recorded in makefile variables, these are defined in config-lang.in.
7069 # We accumulate them and plug them into the main Makefile.
7070 # The other mechanism is a set of hooks for each of the main targets
7071 # like `clean', `install', etc.
7072
7073 language_hooks="Make-hooks"
7074
7075 for lang in ${srcdir}/*/config-lang.in
7076 do
7077 changequote(,)dnl
7078         test "$lang" = "${srcdir}/*/config-lang.in" && continue
7079
7080         lang_alias=`sed -n -e 's,^language=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^language=\([^   ]*\).*$,\1,p' $lang`
7081         if test "x$lang_alias" = x
7082         then
7083               echo "$lang doesn't set \$language." 1>&2
7084               exit 1
7085         fi
7086         subdir="`echo $lang | sed -e 's,^.*/\([^/]*\)/config-lang.in$,\1,'`"
7087         subdirs="$subdirs $subdir"
7088
7089         # $gcc_subdir is where the gcc integration files are to be found
7090         # for a language, both for internal compiler purposes (compiler
7091         # sources implementing front-end to GCC tree converters), and for
7092         # build infrastructure purposes (Make-lang.in, etc.)
7093         #
7094         # This will be <subdir> (relative to $srcdir) if a line like
7095         # gcc_subdir="<subdir>" or gcc_subdir=<subdir>
7096         # is found in <langdir>/config-lang.in, and will remain <langdir>
7097         # otherwise.
7098         #
7099         # Except for the language alias (fetched above), the regular
7100         # "config-lang.in" contents are always retrieved from $gcc_subdir,
7101         # so a <langdir>/config-lang.in setting gcc_subdir typically sets
7102         # only this and the language alias.
7103
7104         gcc_subdir=`sed -n -e 's,^gcc_subdir=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^gcc_subdir=\([^   ]*\).*$,\1,p' $lang`
7105         if [ "$gcc_subdir" = "" ]; then
7106            gcc_subdir="$subdir"
7107         fi
7108
7109         case ",$enable_languages," in
7110         *,$lang_alias,*)
7111             all_selected_languages="$all_selected_languages $lang_alias"
7112             if test -f $srcdir/$gcc_subdir/lang-specs.h; then
7113                 lang_specs_files="$lang_specs_files $srcdir/$gcc_subdir/lang-specs.h"
7114             fi
7115             ;;
7116         esac
7117 changequote([,])dnl
7118
7119         language=
7120         boot_language=
7121         compilers=
7122         outputs=
7123         gtfiles=
7124         subdir_requires=
7125         . ${srcdir}/$gcc_subdir/config-lang.in
7126         if test "x$language" = x
7127         then
7128                 echo "${srcdir}/$gcc_subdir/config-lang.in doesn't set \$language." 1>&2
7129                 exit 1
7130         fi
7131
7132         ok=:
7133         case ",$enable_languages," in
7134                 *,$lang_alias,*) ;;
7135                 *)
7136                         for i in $subdir_requires; do
7137                                 test -f "${srcdir}/$i/config-lang.in" && continue
7138                                 ok=false
7139                                 break
7140                         done
7141                 ;;
7142         esac
7143         $ok || continue
7144
7145         all_lang_configurefrags="$all_lang_configurefrags \$(srcdir)/$gcc_subdir/config-lang.in"
7146         if test "x$language" = xc && test -n "$all_lang_makefrags"; then
7147             # Put c/Make-lang.in fragment first to match serialization languages order.
7148             all_lang_makefrags="\$(srcdir)/$gcc_subdir/Make-lang.in $all_lang_makefrags"
7149         else
7150             all_lang_makefrags="$all_lang_makefrags \$(srcdir)/$gcc_subdir/Make-lang.in"
7151         fi
7152         if test -f $srcdir/$gcc_subdir/lang.opt; then
7153             lang_opt_files="$lang_opt_files $srcdir/$gcc_subdir/lang.opt"
7154             all_opt_files="$all_opt_files $srcdir/$gcc_subdir/lang.opt"
7155         fi
7156         if test -f $srcdir/$gcc_subdir/$subdir-tree.def; then
7157             lang_tree_files="$lang_tree_files $srcdir/$gcc_subdir/$subdir-tree.def"
7158         fi
7159         all_languages="$all_languages $language"
7160         all_compilers="$all_compilers $compilers"
7161         all_outputs="$all_outputs $outputs"
7162         all_gtfiles="$all_gtfiles [[$subdir]] $gtfiles"
7163         case ",$enable_languages," in
7164                 *,lto,*)
7165                     AC_DEFINE(ENABLE_LTO, 1, [Define to enable LTO support.])
7166                     enable_lto=yes
7167                     AC_SUBST(enable_lto)
7168                     ;;
7169                 *) ;;
7170         esac
7171 done
7172
7173 check_languages=
7174 for language in $all_selected_languages
7175 do
7176         check_languages="$check_languages check-$language"
7177 done
7178
7179 selftest_languages=
7180 for language in $all_selected_languages
7181 do
7182         selftest_languages="$selftest_languages selftest-$language"
7183 done
7184
7185 # We link each language in with a set of hooks, reached indirectly via
7186 # lang.${target}.  Only do so for selected languages.
7187
7188 rm -f Make-hooks
7189 touch Make-hooks
7190 target_list="all.cross start.encap rest.encap tags \
7191         install-common install-man install-info install-dvi install-pdf \
7192         install-html dvi pdf html uninstall info man srcextra srcman srcinfo \
7193         mostlyclean clean distclean maintainer-clean install-plugin"
7194
7195 for t in $target_list
7196 do
7197         x=
7198         for lang in $all_selected_languages
7199         do
7200                 x="$x $lang.$t"
7201         done
7202         echo "lang.$t: $x" >> Make-hooks
7203 done
7204
7205 echo "ifeq (\$(DO_LINK_SERIALIZATION),)" >> Make-hooks
7206 echo "SERIAL_LIST =" >> Make-hooks
7207 echo else >> Make-hooks
7208 lang_cnt=0
7209 lang_list=
7210 prev=c
7211 serialization_languages=c
7212 for lang in $all_selected_languages
7213 do
7214         test $lang = c && continue
7215         if test $lang = lto; then
7216                 serialization_languages="$serialization_languages lto1 lto2"
7217         else
7218                 serialization_languages="$serialization_languages $lang"
7219         fi
7220 done
7221 for lang in $serialization_languages
7222 do
7223         test $lang = c && continue
7224         lang_cnt=`expr $lang_cnt + 1`
7225         lang_list=" $prev$lang_list"
7226         prev=${lang}
7227 done
7228 echo "SERIAL_LIST = \$(wordlist \$(DO_LINK_SERIALIZATION),$lang_cnt,$lang_list)" >> Make-hooks
7229 echo endif >> Make-hooks
7230 echo "SERIAL_COUNT = `expr $lang_cnt + 1`" >> Make-hooks
7231 echo "INDEX.c = 0" >> Make-hooks
7232 lang_idx=1
7233 for lang in $serialization_languages
7234 do
7235         test $lang = c && continue
7236         echo "$lang.prev = \$(if \$(word $lang_cnt,\$(SERIAL_LIST)),\$(\$(word $lang_cnt,\$(SERIAL_LIST)).serial))" >> Make-hooks
7237         echo "INDEX.$lang = $lang_idx" >> Make-hooks
7238         lang_cnt=`expr $lang_cnt - 1`
7239         lang_idx=`expr $lang_idx + 1`
7240 done
7241
7242 # --------
7243 # Option include files
7244 # --------
7245
7246 ${AWK} -f $srcdir/opt-include.awk $all_opt_files > option-includes.mk
7247 option_includes="option-includes.mk"
7248 AC_SUBST_FILE(option_includes)
7249
7250 # --------
7251 # UNSORTED
7252 # --------
7253
7254 # Create .gdbinit.
7255
7256 echo "dir ." > .gdbinit
7257 echo "dir ${srcdir}" >> .gdbinit
7258 if test x$gdb_needs_out_file_path = xyes
7259 then
7260         echo "dir ${srcdir}/config/"`dirname ${out_file}` >> .gdbinit
7261 fi
7262 if test "x$subdirs" != x; then
7263         for s in $subdirs
7264         do
7265                 echo "dir ${srcdir}/$s" >> .gdbinit
7266         done
7267 fi
7268 echo "source ${srcdir}/gdbinit.in" >> .gdbinit
7269 echo "python import sys; sys.path.append('${srcdir}'); import gdbhooks" >> .gdbinit
7270
7271 # Put a breakpoint on __asan_report_error to help with debugging buffer
7272 # overflow.
7273 case "$CFLAGS" in
7274 *-fsanitize=address*)
7275   echo "source ${srcdir}/gdbasan.in" >> .gdbinit
7276   ;;
7277 esac
7278
7279 gcc_tooldir='$(libsubdir)/$(libsubdir_to_prefix)$(target_noncanonical)'
7280 AC_SUBST(gcc_tooldir)
7281 AC_SUBST(dollar)
7282
7283 # Find a directory in which to install a shared libgcc.
7284
7285 AC_ARG_ENABLE(version-specific-runtime-libs,
7286 [AS_HELP_STRING([--enable-version-specific-runtime-libs],
7287                 [specify that runtime libraries should be
7288                  installed in a compiler-specific directory])])
7289
7290 # Substitute configuration variables
7291 AC_SUBST(subdirs)
7292 AC_SUBST(srcdir)
7293 AC_SUBST(all_compilers)
7294 AC_SUBST(all_gtfiles)
7295 AC_SUBST(all_lang_configurefrags)
7296 AC_SUBST(all_lang_makefrags)
7297 AC_SUBST(all_languages)
7298 AC_SUBST(all_selected_languages)
7299 AC_SUBST(build_exeext)
7300 AC_SUBST(build_install_headers_dir)
7301 AC_SUBST(build_xm_file_list)
7302 AC_SUBST(build_xm_include_list)
7303 AC_SUBST(build_xm_defines)
7304 AC_SUBST(build_file_translate)
7305 AC_SUBST(check_languages)
7306 AC_SUBST(selftest_languages)
7307 AC_SUBST(cpp_install_dir)
7308 AC_SUBST(xmake_file)
7309 AC_SUBST(tmake_file)
7310 AC_SUBST(TM_ENDIAN_CONFIG)
7311 AC_SUBST(TM_MULTILIB_CONFIG)
7312 AC_SUBST(TM_MULTILIB_EXCEPTIONS_CONFIG)
7313 AC_SUBST(extra_gcc_objs)
7314 AC_SUBST(user_headers_inc_next_pre)
7315 AC_SUBST(user_headers_inc_next_post)
7316 AC_SUBST(extra_headers_list)
7317 AC_SUBST(extra_objs)
7318 AC_SUBST(extra_programs)
7319 AC_SUBST(float_h_file)
7320 AC_SUBST(gcc_config_arguments)
7321 AC_SUBST(gcc_gxx_include_dir)
7322 AC_SUBST(gcc_gxx_include_dir_add_sysroot)
7323 AC_SUBST(gcc_gxx_libcxx_include_dir)
7324 AC_SUBST(gcc_gxx_libcxx_include_dir_add_sysroot)
7325 AC_SUBST(host_exeext)
7326 AC_SUBST(host_xm_file_list)
7327 AC_SUBST(host_xm_include_list)
7328 AC_SUBST(host_xm_defines)
7329 AC_SUBST(out_host_hook_obj)
7330 AC_SUBST(install)
7331 AC_SUBST(lang_opt_files)
7332 AC_SUBST(lang_specs_files)
7333 AC_SUBST(lang_tree_files)
7334 AC_SUBST(local_prefix)
7335 AC_SUBST(md_file)
7336 AC_SUBST(objc_boehm_gc)
7337 AC_SUBST(out_file)
7338 AC_SUBST(out_object_file)
7339 AC_SUBST(common_out_file)
7340 AC_SUBST(common_out_object_file)
7341 AC_SUBST(tm_file_list)
7342 AC_SUBST(tm_include_list)
7343 AC_SUBST(tm_defines)
7344 AC_SUBST(tm_p_file_list)
7345 AC_SUBST(tm_p_include_list)
7346 AC_SUBST(tm_d_file_list)
7347 AC_SUBST(tm_d_include_list)
7348 AC_SUBST(xm_file_list)
7349 AC_SUBST(xm_include_list)
7350 AC_SUBST(xm_defines)
7351 AC_SUBST(use_gcc_stdint)
7352 AC_SUBST(c_target_objs)
7353 AC_SUBST(cxx_target_objs)
7354 AC_SUBST(fortran_target_objs)
7355 AC_SUBST(d_target_objs)
7356 AC_SUBST(target_cpu_default)
7357
7358 AC_SUBST_FILE(language_hooks)
7359
7360 # Echo link setup.
7361 if test x${build} = x${host} ; then
7362   if test x${host} = x${target} ; then
7363     echo "Links are now set up to build a native compiler for ${target}." 1>&2
7364   else
7365     echo "Links are now set up to build a cross-compiler" 1>&2
7366     echo " from ${host} to ${target}." 1>&2
7367   fi
7368 else
7369   if test x${host} = x${target} ; then
7370     echo "Links are now set up to build (on ${build}) a native compiler" 1>&2
7371     echo " for ${target}." 1>&2
7372   else
7373     echo "Links are now set up to build (on ${build}) a cross-compiler" 1>&2
7374     echo " from ${host} to ${target}." 1>&2
7375   fi
7376 fi
7377
7378 AC_ARG_VAR(GMPLIBS,[How to link GMP])
7379 AC_ARG_VAR(GMPINC,[How to find GMP include files])
7380
7381 AC_ARG_VAR(ISLLIBS,[How to link isl])
7382 AC_ARG_VAR(ISLINC,[How to find isl include files])
7383 if test "x${ISLLIBS}" != "x" ; then
7384    AC_DEFINE(HAVE_isl, 1, [Define if isl is in use.])
7385 fi
7386
7387 GCC_ENABLE_PLUGINS
7388 AC_SUBST(pluginlibs)
7389 AC_SUBST(enable_plugin)
7390 if test x"$enable_plugin" = x"yes"; then
7391   AC_DEFINE(ENABLE_PLUGIN, 1, [Define to enable plugin support.])
7392 fi
7393
7394
7395 # Enable --enable-host-shared
7396 AC_ARG_ENABLE(host-shared,
7397 [AS_HELP_STRING([--enable-host-shared],
7398                 [build host code as shared libraries])],
7399 [PICFLAG=-fPIC], [PICFLAG=])
7400 AC_SUBST(enable_host_shared)
7401 AC_SUBST(PICFLAG)
7402
7403
7404 AC_ARG_ENABLE(libquadmath-support,
7405 [AS_HELP_STRING([--disable-libquadmath-support],
7406   [disable libquadmath support for Fortran])],
7407 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
7408 ENABLE_LIBQUADMATH_SUPPORT=yes)
7409 if test "${ENABLE_LIBQUADMATH_SUPPORT}" != "no" ; then
7410   AC_DEFINE(ENABLE_LIBQUADMATH_SUPPORT, 1,
7411             [Define to 1 to enable libquadmath support])
7412 fi
7413
7414
7415 # Specify what hash style to use by default.
7416 AC_ARG_WITH([linker-hash-style],
7417 [AC_HELP_STRING([--with-linker-hash-style={sysv,gnu,both}],
7418                 [specify the linker hash style])],
7419 [case x"$withval" in
7420    xsysv)
7421      LINKER_HASH_STYLE=sysv
7422      ;;
7423    xgnu)
7424      LINKER_HASH_STYLE=gnu
7425      ;;
7426    xboth)
7427      LINKER_HASH_STYLE=both
7428      ;;
7429    *)
7430      AC_MSG_ERROR([$withval is an invalid option to --with-linker-hash-style])
7431      ;;
7432  esac],
7433 [LINKER_HASH_STYLE=''])
7434 if test x"${LINKER_HASH_STYLE}" != x; then
7435   AC_DEFINE_UNQUOTED(LINKER_HASH_STYLE, "$LINKER_HASH_STYLE",
7436                                          [The linker hash style])
7437 fi
7438
7439 # Specify what should be the default of -fdiagnostics-color option.
7440 AC_ARG_WITH([diagnostics-color],
7441 [AC_HELP_STRING([--with-diagnostics-color={never,auto,auto-if-env,always}],
7442                 [specify the default of -fdiagnostics-color option
7443                  auto-if-env stands for -fdiagnostics-color=auto if
7444                  GCC_COLOR environment variable is present and
7445                  -fdiagnostics-color=never otherwise])],
7446 [case x"$withval" in
7447    xnever)
7448      DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_NO
7449      ;;
7450    xauto)
7451      DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_AUTO
7452      ;;
7453    xauto-if-env)
7454      DIAGNOSTICS_COLOR_DEFAULT=-1
7455      ;;
7456    xalways)
7457      DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_YES
7458      ;;
7459    *)
7460      AC_MSG_ERROR([$withval is an invalid option to --with-diagnostics-color])
7461      ;;
7462  esac],
7463 [DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_AUTO])
7464 AC_DEFINE_UNQUOTED(DIAGNOSTICS_COLOR_DEFAULT, $DIAGNOSTICS_COLOR_DEFAULT,
7465                    [The default for -fdiagnostics-color option])
7466
7467 # Specify what should be the default of -fdiagnostics-urls option.
7468 AC_ARG_WITH([diagnostics-urls],
7469 [AC_HELP_STRING([--with-diagnostics-urls={never,auto,auto-if-env,always}],
7470                 [specify the default of -fdiagnostics-urls option
7471                  auto-if-env stands for -fdiagnostics-urls=auto if
7472                  GCC_URLS or TERM_URLS environment variable is present and
7473                  -fdiagnostics-urls=never otherwise])],
7474 [case x"$withval" in
7475    xnever)
7476      DIAGNOSTICS_URLS_DEFAULT=DIAGNOSTICS_URL_NO
7477      ;;
7478    xauto)
7479      DIAGNOSTICS_URLS_DEFAULT=DIAGNOSTICS_URL_AUTO
7480      ;;
7481    xauto-if-env)
7482      DIAGNOSTICS_URLS_DEFAULT=-1
7483      ;;
7484    xalways)
7485      DIAGNOSTICS_URLS_DEFAULT=DIAGNOSTICS_URL_YES
7486      ;;
7487    *)
7488      AC_MSG_ERROR([$withval is an invalid option to --with-diagnostics-urls])
7489      ;;
7490  esac],
7491 [DIAGNOSTICS_URLS_DEFAULT=DIAGNOSTICS_URL_AUTO])
7492 AC_DEFINE_UNQUOTED(DIAGNOSTICS_URLS_DEFAULT, $DIAGNOSTICS_URLS_DEFAULT,
7493                    [The default for -fdiagnostics-urls option])
7494
7495 # Generate gcc-driver-name.h containing GCC_DRIVER_NAME for the benefit
7496 # of jit/jit-playback.cc.
7497 gcc_driver_version=`eval "${get_gcc_base_ver} $srcdir/BASE-VER"`
7498 echo "gcc_driver_version: ${gcc_driver_version}"
7499 cat > gcc-driver-name.h <<EOF
7500 #define GCC_DRIVER_NAME "${target_noncanonical}-gcc-${gcc_driver_version}${exeext}"
7501 EOF
7502
7503 # Check whether --enable-default-pie was given.
7504 AC_ARG_ENABLE(default-pie,
7505 [AS_HELP_STRING([--enable-default-pie],
7506   [enable Position Independent Executable as default])],
7507 enable_default_pie=$enableval,
7508 enable_default_pie=no)
7509 if test x$enable_default_pie = xyes ; then
7510   AC_DEFINE(ENABLE_DEFAULT_PIE, 1,
7511       [Define if your target supports default PIE and it is enabled.])
7512 fi
7513 AC_SUBST([enable_default_pie])
7514
7515 # Check if -fno-PIE works.
7516 AC_CACHE_CHECK([for -fno-PIE option],
7517   [gcc_cv_c_no_fpie],
7518   [saved_CXXFLAGS="$CXXFLAGS"
7519    CXXFLAGS="$CXXFLAGS -fno-PIE"
7520    AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) {return 0;}])],
7521      [gcc_cv_c_no_fpie=yes],
7522      [gcc_cv_c_no_fpie=no])
7523    CXXFLAGS="$saved_CXXFLAGS"])
7524 if test "$gcc_cv_c_no_fpie" = "yes"; then
7525   NO_PIE_CFLAGS="-fno-PIE"
7526 fi
7527 AC_SUBST([NO_PIE_CFLAGS])
7528
7529 # Check if -no-pie works.
7530 AC_CACHE_CHECK([for -no-pie option],
7531   [gcc_cv_no_pie],
7532   [saved_LDFLAGS="$LDFLAGS"
7533    LDFLAGS="$LDFLAGS -no-pie"
7534    AC_LINK_IFELSE([AC_LANG_SOURCE([int main(void) {return 0;}])],
7535      [gcc_cv_no_pie=yes],
7536      [gcc_cv_no_pie=no])
7537    LDFLAGS="$saved_LDFLAGS"])
7538 if test "$gcc_cv_no_pie" = "yes"; then
7539   NO_PIE_FLAG="-no-pie"
7540 fi
7541 AC_SUBST([NO_PIE_FLAG])
7542
7543 # Enable Intel CET on Intel CET enabled host if jit is enabled.
7544 GCC_CET_HOST_FLAGS(CET_HOST_FLAGS)
7545 case x$enable_languages in
7546 *jit*)
7547   ;;
7548 *)
7549   CET_HOST_FLAGS=
7550   ;;
7551 esac
7552 AC_SUBST(CET_HOST_FLAGS)
7553
7554 # Check linker supports '-z bndplt'
7555 ld_bndplt_support=no
7556 AC_MSG_CHECKING(linker -z bndplt option)
7557 if test x"$ld_is_gold" = xno; then
7558   if test $in_tree_ld = yes ; then
7559     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 25 -o "$gcc_cv_gld_major_version" -gt 2; then
7560       ld_bndplt_support=yes
7561     fi
7562   elif test x$gcc_cv_ld != x; then
7563     # Check if linker supports -a bndplt option
7564     if $gcc_cv_ld --help 2>&1 | grep -- '-z bndplt' > /dev/null; then
7565       ld_bndplt_support=yes
7566     fi
7567   fi
7568 fi
7569 if test x"$ld_bndplt_support" = xyes; then
7570   AC_DEFINE(HAVE_LD_BNDPLT_SUPPORT, 1,
7571         [Define if your linker supports -z bndplt])
7572 fi
7573 AC_MSG_RESULT($ld_bndplt_support)
7574
7575 # Check linker supports '--push-state'/'--pop-state'
7576 ld_pushpopstate_support=no
7577 AC_MSG_CHECKING(linker --push-state/--pop-state options)
7578 if test x"$ld_is_gold" = xno; then
7579   if test $in_tree_ld = yes ; then
7580     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 25 -o "$gcc_cv_gld_major_version" -gt 2; then
7581       ld_pushpopstate_support=yes
7582     fi
7583   elif test x$gcc_cv_ld != x; then
7584     # Check if linker supports --push-state/--pop-state options
7585     if $gcc_cv_ld --help 2>&1 | grep -- '--push-state' > /dev/null; then
7586       ld_pushpopstate_support=yes
7587     fi
7588   fi
7589 fi
7590 if test x"$ld_pushpopstate_support" = xyes; then
7591   AC_DEFINE(HAVE_LD_PUSHPOPSTATE_SUPPORT, 1,
7592         [Define if your linker supports --push-state/--pop-state])
7593 fi
7594 AC_MSG_RESULT($ld_pushpopstate_support)
7595
7596 # On s390, float_t has historically been statically defined as double for no
7597 # good reason. To comply with the C standard in the light of this definition,
7598 # gcc has evaluated float expressions in double precision when in
7599 # standards-compatible mode or when given -fexcess-precision=standard. To enable
7600 # a smooth transition towards the new model used by most architectures, where
7601 # gcc describes its behavior via the macro __FLT_EVAL_METHOD__ and glibc derives
7602 # float_t from that, this behavior can be configured with
7603 # --enable-s390-excess-float-precision. When given as enabled, that flag selects
7604 # the old model. When omitted, native builds and cross compiles that have target
7605 # libc headers will detect whether libc clamps float_t to double and in that
7606 # case maintain the old model. Otherwise, they will default to the new model.
7607 AC_ARG_ENABLE(s390-excess-float-precision,
7608   [AS_HELP_STRING([--enable-s390-excess-float-precision],
7609                   [on s390 targets, evaluate float with double precision
7610                    when in standards-conforming mode])],
7611   [],[enable_s390_excess_float_precision=auto])
7612
7613 case $target in
7614   s390*-linux*)
7615   if test x"$enable_s390_excess_float_precision" = xauto; then
7616     # Can we autodetect the behavior of the target libc?
7617     if test "$target" = "$host" -a "$host" = "$build"; then
7618       enable_s390_excess_float_precision=autodetect
7619     elif test "x$with_headers" != xno; then
7620       # cross build. are target headers available?
7621       # carefully coerce the build-system compiler to use target headers
7622       saved_CXXFLAGS="$CXXFLAGS"
7623       fixed_XGCC_FLAGS_FOR_TARGET=`echo "$XGCC_FLAGS_FOR_TARGET" | sed 's/-B/-idirafter/g'`
7624       CROSS_TEST_CXXFLAGS="-nostdinc $fixed_XGCC_FLAGS_FOR_TARGET"
7625       CXXFLAGS="$CROSS_TEST_CXXFLAGS"
7626       AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
7627 #include <math.h>
7628 ]])], [enable_s390_excess_float_precision=autodetect], [])
7629       CXXFLAGS="$saved_CXXFLAGS"
7630     fi
7631
7632     if test x"$enable_s390_excess_float_precision" = xautodetect; then
7633       saved_CXXFLAGS="$CXXFLAGS"
7634       if ! test "$target" = "$host" -a "$host" = "$build"; then
7635         CXXFLAGS="$CROSS_TEST_CXXFLAGS"
7636         unset CROSS_TEST_CXXFLAGS
7637       fi
7638       AC_CACHE_CHECK([for glibc clamping float_t to double],
7639         gcc_cv_float_t_clamped_to_double, [
7640         AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
7641 #define __FLT_EVAL_METHOD__ 0
7642 #include <math.h>
7643 int dummy[sizeof(float_t) == sizeof(double) ? 1 : -1];
7644 ]])],
7645           [gcc_cv_float_t_clamped_to_double=yes],
7646           [gcc_cv_float_t_clamped_to_double=no])])
7647       CXXFLAGS="$saved_CXXFLAGS"
7648       enable_s390_excess_float_precision="$gcc_cv_float_t_clamped_to_double"
7649     else
7650       # no way to detect behavior of target libc, default to new model
7651       enable_s390_excess_float_precision=no
7652     fi
7653   fi
7654
7655   GCC_TARGET_TEMPLATE(ENABLE_S390_EXCESS_FLOAT_PRECISION)
7656   if test x"$enable_s390_excess_float_precision" = xyes; then
7657     AC_DEFINE(ENABLE_S390_EXCESS_FLOAT_PRECISION, 1,
7658 [Define to enable evaluating float expressions with double precision in
7659 standards-compatible mode on s390 targets.])
7660   fi
7661   ;;
7662 esac
7663
7664 # Configure the subdirectories
7665 # AC_CONFIG_SUBDIRS($subdirs)
7666
7667 # Create the Makefile
7668 # and configure language subdirectories
7669 AC_CONFIG_FILES($all_outputs)
7670
7671 AC_CONFIG_COMMANDS([default],
7672 [
7673 case ${CONFIG_HEADERS} in
7674   *auto-host.h:config.in*)
7675   echo > cstamp-h ;;
7676 esac
7677 # Make sure all the subdirs exist.
7678 for d in $subdirs doc build common c-family
7679 do
7680     test -d $d || mkdir $d
7681 done
7682 ],
7683 [subdirs='$subdirs'])
7684 AC_OUTPUT
7685