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_MACRO_DIRS([../config] [..])
  29 AC_CONFIG_HEADER(auto-host.h:config.in)
  30
  31 gcc_version=`cat $srcdir/BASE-VER`
  32
  33 # Determine the host, build, and target systems
  34 AC_CANONICAL_BUILD
  35 AC_CANONICAL_HOST
  36 AC_CANONICAL_TARGET
  37
  38 # Determine the noncanonical host name, for Ada.
  39 ACX_NONCANONICAL_HOST
  40
  41 # Determine the noncanonical target name, for directory use.
  42 ACX_NONCANONICAL_TARGET
  43
  44 # Used for constructing correct paths for offload compilers.
  45 real_target_noncanonical=${target_noncanonical}
  46 accel_dir_suffix=
  47
  48 # Determine the target- and build-specific subdirectories
  49 GCC_TOPLEV_SUBDIRS
  50
  51 # Set program_transform_name
  52 AC_ARG_PROGRAM
  53
  54 # Check for bogus environment variables.
  55 # Test if LIBRARY_PATH contains the notation for the current directory
  56 # since this would lead to problems installing/building glibc.
  57 # LIBRARY_PATH contains the current directory if one of the following
  58 # is true:
  59 # - one of the terminals (":" and ";") is the first or last sign
  60 # - two terminals occur directly after each other
  61 # - the path contains an element with a dot in it
  62 AC_MSG_CHECKING(LIBRARY_PATH variable)
  63 changequote(,)dnl
  64 case ${LIBRARY_PATH} in
  65   [:\;]* | *[:\;] | *[:\;][:\;]* |  *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
  66     library_path_setting="contains current directory"
  67     ;;
  68   *)
  69     library_path_setting="ok"
  70     ;;
  71 esac
  72 changequote([,])dnl
  73 AC_MSG_RESULT($library_path_setting)
  74 if test "$library_path_setting" != "ok"; then
  75 AC_MSG_ERROR([
  76 *** LIBRARY_PATH shouldn't contain the current directory when
  77 *** building gcc. Please change the environment variable
  78 *** and run configure again.])
  79 fi
  80
  81 # Test if GCC_EXEC_PREFIX contains the notation for the current directory
  82 # since this would lead to problems installing/building glibc.
  83 # GCC_EXEC_PREFIX contains the current directory if one of the following
  84 # is true:
  85 # - one of the terminals (":" and ";") is the first or last sign
  86 # - two terminals occur directly after each other
  87 # - the path contains an element with a dot in it
  88 AC_MSG_CHECKING(GCC_EXEC_PREFIX variable)
  89 changequote(,)dnl
  90 case ${GCC_EXEC_PREFIX} in
  91   [:\;]* | *[:\;] | *[:\;][:\;]* |  *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
  92     gcc_exec_prefix_setting="contains current directory"
  93     ;;
  94   *)
  95     gcc_exec_prefix_setting="ok"
  96     ;;
  97 esac
  98 changequote([,])dnl
  99 AC_MSG_RESULT($gcc_exec_prefix_setting)
 100 if test "$gcc_exec_prefix_setting" != "ok"; then
 101 AC_MSG_ERROR([
 102 *** GCC_EXEC_PREFIX shouldn't contain the current directory when
 103 *** building gcc. Please change the environment variable
 104 *** and run configure again.])
 105 fi
 106
 107 # -----------
 108 # Directories
 109 # -----------
 110
 111 # Specify the local prefix
 112 local_prefix=
 113 AC_ARG_WITH(local-prefix,
 114 [AS_HELP_STRING([--with-local-prefix=DIR],
 115                 [specifies directory to put local include])],
 116 [case "${withval}" in
 117 yes)    AC_MSG_ERROR(bad value ${withval} given for local include directory prefix) ;;
 118 no)     ;;
 119 *)      local_prefix=$with_local_prefix ;;
 120 esac])
 121
 122 # Default local prefix if it is empty
 123 if test x$local_prefix = x; then
 124         local_prefix=/usr/local
 125 fi
 126
 127 AC_ARG_WITH([native-system-header-dir],
 128   [  --with-native-system-header-dir=dir
 129                           use dir as the directory to look for standard
 130                           system header files in.  Defaults to /usr/include.],
 131 [
 132  case ${with_native_system_header_dir} in
 133  yes|no) AC_MSG_ERROR([bad value ${withval} given for --with-native-system-header-dir]) ;;
 134  /* | [[A-Za-z]]:[[\\/]]*) ;;
 135  *) AC_MSG_ERROR([--with-native-system-header-dir argument ${withval} must be an absolute directory]) ;;
 136  esac
 137  configured_native_system_header_dir="${withval}"
 138 ], [configured_native_system_header_dir=])
 139
 140 AC_ARG_WITH(build-sysroot,
 141   [AS_HELP_STRING([--with-build-sysroot=sysroot],
 142                   [use sysroot as the system root during the build])],
 143   [if test x"$withval" != x ; then
 144      SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
 145    fi],
 146   [SYSROOT_CFLAGS_FOR_TARGET=])
 147 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
 148
 149 if test "x$prefix" = xNONE; then
 150  test_prefix=/usr/local
 151 else
 152  test_prefix=$prefix
 153 fi
 154 if test "x$exec_prefix" = xNONE; then
 155  test_exec_prefix=$test_prefix
 156 else
 157  test_exec_prefix=$exec_prefix
 158 fi
 159
 160 AC_ARG_WITH(sysroot,
 161 [AS_HELP_STRING([[--with-sysroot[=DIR]]],
 162                 [search for usr/lib, usr/include, et al, within DIR])],
 163 [
 164  case ${with_sysroot} in
 165  /) ;;
 166  */) with_sysroot=`echo $with_sysroot | sed 's,/$,,'` ;;
 167  esac
 168  case ${with_sysroot} in
 169  yes) TARGET_SYSTEM_ROOT='${exec_prefix}/${target_noncanonical}/sys-root' ;;
 170  *) TARGET_SYSTEM_ROOT=$with_sysroot ;;
 171  esac
 172
 173  TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"$(TARGET_SYSTEM_ROOT)\"'
 174  CROSS_SYSTEM_HEADER_DIR='$(TARGET_SYSTEM_ROOT)$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
 175
 176  case ${TARGET_SYSTEM_ROOT} in
 177  "${test_prefix}"|"${test_prefix}/"*|\
 178  "${test_exec_prefix}"|"${test_exec_prefix}/"*|\
 179  '${prefix}'|'${prefix}/'*|\
 180  '${exec_prefix}'|'${exec_prefix}/'*)
 181    t="$TARGET_SYSTEM_ROOT_DEFINE -DTARGET_SYSTEM_ROOT_RELOCATABLE"
 182    TARGET_SYSTEM_ROOT_DEFINE="$t"
 183    ;;
 184  esac
 185 ], [
 186  TARGET_SYSTEM_ROOT=
 187  TARGET_SYSTEM_ROOT_DEFINE=
 188  CROSS_SYSTEM_HEADER_DIR='$(gcc_tooldir)/sys-include'
 189 ])
 190 AC_SUBST(TARGET_SYSTEM_ROOT)
 191 AC_SUBST(TARGET_SYSTEM_ROOT_DEFINE)
 192 AC_SUBST(CROSS_SYSTEM_HEADER_DIR)
 193
 194 # Don't set gcc_gxx_include_dir to gxx_include_dir since that's only
 195 # passed in by the toplevel make and thus we'd get different behavior
 196 # depending on where we built the sources.
 197 gcc_gxx_include_dir=
 198 # Specify the g++ header file directory
 199 AC_ARG_WITH(gxx-include-dir,
 200 [AS_HELP_STRING([--with-gxx-include-dir=DIR],
 201                 [specifies directory to put g++ header files])],
 202 [case "${withval}" in
 203 yes)    AC_MSG_ERROR(bad value ${withval} given for g++ include directory) ;;
 204 no)     ;;
 205 *)      gcc_gxx_include_dir=$with_gxx_include_dir ;;
 206 esac])
 207
 208 # If both --with-sysroot and --with-gxx-include-dir are passed, we interpolate
 209 # the former in the latter and, upon success, compute gcc_gxx_include_dir as
 210 # relative to the sysroot.
 211 gcc_gxx_include_dir_add_sysroot=0
 212
 213 # This logic must match libstdc++-v3/acinclude.m4:GLIBCXX_EXPORT_INSTALL_INFO.
 214 if test x${gcc_gxx_include_dir} = x; then
 215   if test x${enable_version_specific_runtime_libs} = xyes; then
 216     gcc_gxx_include_dir='${libsubdir}/include/c++'
 217   else
 218     libstdcxx_incdir='include/c++/$(version)'
 219     if test x$host != x$target; then
 220        libstdcxx_incdir="$target_alias/$libstdcxx_incdir"
 221     fi
 222     gcc_gxx_include_dir="\$(libsubdir)/\$(libsubdir_to_prefix)$libstdcxx_incdir"
 223   fi
 224 elif test "${with_sysroot+set}" = set; then
 225   gcc_gxx_without_sysroot=`expr "${gcc_gxx_include_dir}" : "${with_sysroot}"'\(.*\)'`
 226   if test "${gcc_gxx_without_sysroot}"; then
 227     gcc_gxx_include_dir="${gcc_gxx_without_sysroot}"
 228     gcc_gxx_include_dir_add_sysroot=1
 229   fi
 230 fi
 231
 232 # Configuration for an alternate set of C++ headers.
 233 gcc_gxx_libcxx_include_dir=
 234 # Specify the alternate g++ header file directory
 235 AC_ARG_WITH(gxx-libcxx-include-dir,
 236 [AS_HELP_STRING([--with-gxx-libcxx-include-dir=DIR],
 237                 [specifies directory to find libc++ header files])],
 238 [case "${withval}" in
 239 yes)    AC_MSG_ERROR(bad value ${withval} given for libc++ include directory) ;;
 240 no)     ;;
 241 *)      gcc_gxx_libcxx_include_dir=$with_gxx_libcxx_include_dir ;;
 242 esac])
 243
 244 # If both --with-sysroot and --with-gxx-libcxx-include-dir are passed, we
 245 # check to see if the latter starts with the former and, upon success, compute
 246 # gcc_gxx_libcxx_include_dir as relative to the sysroot.
 247 gcc_gxx_libcxx_include_dir_add_sysroot=0
 248
 249 if test x${gcc_gxx_libcxx_include_dir} != x; then
 250   AC_DEFINE(ENABLE_STDLIB_OPTION, 1,
 251             [Define if the -stdlib= option should be enabled.])
 252 else
 253   AC_DEFINE(ENABLE_STDLIB_OPTION, 0)
 254 fi
 255 # ??? This logic must match libstdc++-v3/acinclude.m4:GLIBCXX_EXPORT_INSTALL_INFO.
 256 if test x${gcc_gxx_libcxx_include_dir} = x; then
 257   if test x${enable_version_specific_runtime_libs} = xyes; then
 258     gcc_gxx_libcxx_include_dir='${libsubdir}/libc++_include/c++/v1'
 259   else
 260     libcxx_incdir='libc++_include/c++/$(version)/v1'
 261     if test x$host != x$target; then
 262        libcxx_incdir="$target_alias/$libcxx_incdir"
 263     fi
 264     gcc_gxx_libcxx_include_dir="\$(libsubdir)/\$(libsubdir_to_prefix)$libcxx_incdir"
 265   fi
 266 elif test "${with_sysroot+set}" = set; then
 267   gcc_gxx_libcxx_without_sysroot=`expr "${gcc_gxx_libcxx_include_dir}" : "${with_sysroot}"'\(.*\)'`
 268   if test "${gcc_gxx_libcxx_without_sysroot}"; then
 269     gcc_gxx_libcxx_include_dir="${gcc_gxx_libcxx_without_sysroot}"
 270     gcc_gxx_libcxx_include_dir_add_sysroot=1
 271   fi
 272 fi
 273
 274 AC_ARG_WITH(cpp_install_dir,
 275 [AC_HELP_STRING([--with-cpp-install-dir=DIR],
 276                 [install the user visible C preprocessor in DIR
 277                  (relative to PREFIX) as well as PREFIX/bin])],
 278 [if test x$withval = xyes; then
 279   AC_MSG_ERROR([option --with-cpp-install-dir requires an argument])
 280 elif test x$withval != xno; then
 281   cpp_install_dir=$withval
 282 fi])
 283
 284 # We would like to our source tree to be readonly.  However when releases or
 285 # pre-releases are generated, the flex/bison generated files as well as the
 286 # various formats of manuals need to be included along with the rest of the
 287 # sources.  Therefore we have --enable-generated-files-in-srcdir to do
 288 # just that.
 289
 290 AC_MSG_CHECKING([whether to place generated files in the source directory])
 291   dnl generated-files-in-srcdir is disabled by default
 292   AC_ARG_ENABLE(generated-files-in-srcdir,
 293     [AS_HELP_STRING([--enable-generated-files-in-srcdir],
 294                     [put copies of generated files in source dir
 295                      intended for creating source tarballs for users
 296                      without texinfo bison or flex])],
 297       generated_files_in_srcdir=$enableval,
 298       generated_files_in_srcdir=no)
 299
 300 AC_MSG_RESULT($generated_files_in_srcdir)
 301
 302 if test "$generated_files_in_srcdir" = "yes"; then
 303   GENINSRC=''
 304 else
 305   GENINSRC='#'
 306 fi
 307 AC_SUBST(GENINSRC)
 308
 309 # -------------------
 310 # Find default linker
 311 # -------------------
 312
 313 # With GNU ld
 314 AC_ARG_WITH(gnu-ld,
 315 [AS_HELP_STRING([--with-gnu-ld], [arrange to work with GNU ld])],
 316 gnu_ld_flag="$with_gnu_ld",
 317 gnu_ld_flag=no)
 318
 319 case $target in
 320     *darwin*)
 321         ld64_flag=yes # Darwin can only use a ld64-compatible linker.
 322         dsymutil_flag=yes # Darwin uses dsymutil to link debug.
 323         ;;
 324     *)
 325         ld64_flag=no
 326         dsymutil_flag=no
 327         ;;
 328 esac
 329
 330 # With pre-defined ld
 331 AC_ARG_WITH(ld,
 332 [AS_HELP_STRING([--with-ld], [arrange to use the specified ld (full pathname)])],
 333 DEFAULT_LINKER="$with_ld")
 334 if test x"${DEFAULT_LINKER+set}" = x"set"; then
 335   if test ! -x "$DEFAULT_LINKER"; then
 336     AC_MSG_ERROR([cannot execute: $DEFAULT_LINKER: check --with-ld or env. var. DEFAULT_LINKER])
 337   elif $DEFAULT_LINKER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
 338     gnu_ld_flag=yes
 339   elif $DEFAULT_LINKER -v < /dev/null 2>&1 | grep ld64- > /dev/null; then
 340     ld64_flag=yes
 341   fi
 342   AC_DEFINE_UNQUOTED(DEFAULT_LINKER,"$DEFAULT_LINKER",
 343         [Define to enable the use of a default linker.])
 344 fi
 345
 346 AC_MSG_CHECKING([whether a default linker was specified])
 347 if test x"${DEFAULT_LINKER+set}" = x"set"; then
 348   if test x"$gnu_ld_flag" = x"no"; then
 349     AC_MSG_RESULT([yes ($DEFAULT_LINKER)])
 350   else
 351     AC_MSG_RESULT([yes ($DEFAULT_LINKER - GNU ld)])
 352   fi
 353 else
 354   AC_MSG_RESULT(no)
 355 fi
 356
 357 # With demangler in GNU ld
 358 AC_ARG_WITH(demangler-in-ld,
 359 [AS_HELP_STRING([--with-demangler-in-ld], [try to use demangler in GNU ld])],
 360 demangler_in_ld="$with_demangler_in_ld",
 361 demangler_in_ld=yes)
 362
 363 # Allow the user to specify a dsymutil executable (used on Darwin only, so far)
 364 AC_ARG_WITH(dsymutil,
 365 [AS_HELP_STRING([--with-dsymutil], [arrange to use the specified dsymutil (full pathname)])],
 366 DEFAULT_DSYMUTIL="$with_dsymutil")
 367
 368 dsymutil_vers=
 369 if test x"${DEFAULT_DSYMUTIL+set}" = x"set"; then
 370   if test ! -x "$DEFAULT_DSYMUTIL"; then
 371     AC_MSG_ERROR([cannot execute: $DEFAULT_DSYMUTIL: check --with-dsymutil or env. var. DEFAULT_DSYMUTIL])
 372   else
 373     if dsymutil_vers=`$DEFAULT_DSYMUTIL -v /dev/null 2>&1`; then
 374       dsymutil_flag=yes
 375     fi
 376   fi
 377   AC_DEFINE_UNQUOTED(DEFAULT_DSYMUTIL,"$DEFAULT_DSYMUTIL",
 378         [Define to enable the use of a default debug linker.])
 379 fi
 380
 381 AC_MSG_CHECKING([whether a default dsymutil was specified])
 382 if test x"${DEFAULT_DSYMUTIL+set}" = x"set"; then
 383   AC_MSG_RESULT([yes ($DEFAULT_DSYMUTIL)])
 384 else
 385   AC_MSG_RESULT(no)
 386 fi
 387
 388 # ----------------------
 389 # Find default assembler
 390 # ----------------------
 391
 392 # With GNU as
 393 AC_ARG_WITH(gnu-as,
 394 [AS_HELP_STRING([--with-gnu-as], [arrange to work with GNU as])],
 395 gas_flag="$with_gnu_as",
 396 gas_flag=no)
 397
 398 AC_ARG_WITH(as,
 399 [AS_HELP_STRING([--with-as], [arrange to use the specified as (full pathname)])],
 400 DEFAULT_ASSEMBLER="$with_as")
 401 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
 402   if test ! -x "$DEFAULT_ASSEMBLER"; then
 403     AC_MSG_ERROR([cannot execute: $DEFAULT_ASSEMBLER: check --with-as or env. var. DEFAULT_ASSEMBLER])
 404   elif $DEFAULT_ASSEMBLER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
 405     gas_flag=yes
 406   fi
 407   AC_DEFINE_UNQUOTED(DEFAULT_ASSEMBLER,"$DEFAULT_ASSEMBLER",
 408         [Define to enable the use of a default assembler.])
 409 fi
 410
 411 AC_MSG_CHECKING([whether a default assembler was specified])
 412 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
 413   if test x"$gas_flag" = x"no"; then
 414     AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER)])
 415   else
 416     AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER - GNU as)])
 417   fi
 418 else
 419   AC_MSG_RESULT(no)
 420 fi
 421
 422 # ---------------
 423 # Find C compiler
 424 # ---------------
 425
 426 # If a non-executable a.out is present (e.g. created by GNU as above even if
 427 # invoked with -v only), the IRIX 6 native ld just overwrites the existing
 428 # file, even when creating an executable, so an execution test fails.
 429 # Remove possible default executable files to avoid this.
 430 #
 431 # FIXME: This really belongs into AC_PROG_CC and can be removed once
 432 # Autoconf includes it.
 433 rm -f a.out a.exe b.out
 434
 435 # Find the native compiler
 436 AC_PROG_CC
 437 AC_PROG_CXX
 438 ACX_PROG_GNAT([-I"$srcdir"/ada/libgnat])
 439 ACX_PROG_GDC([-I"$srcdir"/d])
 440
 441 # Do configure tests with the C++ compiler, since that's what we build with.
 442 AC_LANG(C++)
 443
 444 # Remove the -O2: for historical reasons, unless bootstrapping we prefer
 445 # optimizations to be activated explicitly by the toplevel.
 446 case "$CC" in
 447   */prev-gcc/xgcc*) ;;
 448   *) CFLAGS=`echo "$CFLAGS " | sed -e "s/-Ofast[[       ]]//" -e "s/-O[[gs]][[  ]]//" -e "s/-O[[0-9]]*[[        ]]//" `
 449      CXXFLAGS=`echo "$CXXFLAGS " | sed -e "s/-Ofast[[   ]]//" -e "s/-O[[gs]][[  ]]//" -e "s/-O[[0-9]]*[[        ]]//" ` ;;
 450 esac
 451 AC_SUBST(CFLAGS)
 452 AC_SUBST(CXXFLAGS)
 453 AC_SUBST(GDCFLAGS)
 454
 455 # Determine PICFLAG for target gnatlib.
 456 GCC_PICFLAG_FOR_TARGET
 457 AC_SUBST(PICFLAG_FOR_TARGET)
 458
 459 # -------------------------
 460 # Check C compiler features
 461 # -------------------------
 462
 463 AC_USE_SYSTEM_EXTENSIONS
 464
 465 AC_PROG_CPP
 466 AC_C_INLINE
 467
 468 AC_SYS_LARGEFILE
 469 AC_CHECK_SIZEOF(ino_t)
 470 AC_CHECK_SIZEOF(dev_t)
 471
 472 # Select the right stat being able to handle 64bit inodes, if needed.
 473 if test "$enable_largefile" != no; then
 474   case "$host, $build" in
 475     *-*-aix*,*|*,*-*-aix*)
 476       if test "$ac_cv_sizeof_ino_t" == "4" -a "$ac_cv_sizeof_dev_t" == 4; then
 477         AC_DEFINE(HOST_STAT_FOR_64BIT_INODES, stat64x,
 478           [Define which stat syscall is able to handle 64bit indodes.])
 479       fi;;
 480   esac
 481 fi
 482
 483
 484 # sizeof(char) is 1 by definition.
 485 AC_CHECK_SIZEOF(void *)
 486 AC_CHECK_SIZEOF(short)
 487 AC_CHECK_SIZEOF(int)
 488 AC_CHECK_SIZEOF(long)
 489 AC_CHECK_TYPES([long long], [AC_CHECK_SIZEOF(long long)])
 490 GCC_STDINT_TYPES
 491 if test x"$ac_cv_c_uint64_t" = x"no" -o x"$ac_cv_c_int64_t" = x"no"; then
 492   AC_MSG_ERROR([uint64_t or int64_t not found])
 493 fi
 494
 495 # check what underlying integer type int64_t uses
 496 AC_CACHE_CHECK(for int64_t underlying type, ac_cv_int64_t_type, [
 497 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 498 #ifdef HAVE_STDINT_H
 499 #include <stdint.h>
 500 #endif
 501 template <typename T> struct X { };
 502 template <>
 503 struct X<long> { typedef long t; };
 504 ]], [[X<int64_t>::t x;]])],[ac_cv_int64_t_type=long],[ac_cv_int64_t_type="long long"])])
 505 if test "$ac_cv_int64_t_type" = "long"; then
 506   AC_DEFINE(INT64_T_IS_LONG, 1,
 507   [Define if int64_t uses long as underlying type.])
 508 else
 509 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 510 #ifdef HAVE_STDINT_H
 511 #include <stdint.h>
 512 #endif
 513 template <typename T> struct X { };
 514 template <>
 515 struct X<long long> { typedef long long t; };
 516 ]], [[X<int64_t>::t x;]])],[],[AC_MSG_ERROR([error verifying int64_t uses long long])])
 517 fi
 518
 519 AC_CACHE_CHECK(for std::swap in <utility>, ac_cv_std_swap_in_utility, [
 520 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 521 #include <utility>
 522 ]], [[int a, b; std::swap(a,b);]])],[ac_cv_std_swap_in_utility=yes],[ac_cv_std_swap_in_utility=no])])
 523 if test $ac_cv_std_swap_in_utility = yes; then
 524   AC_DEFINE(HAVE_SWAP_IN_UTILITY, 1,
 525   [Define if <utility> defines std::swap.])
 526 fi
 527
 528 # Check whether compiler is affected by placement new aliasing bug (PR 29286).
 529 # If the host compiler is affected by the bug, and we build with optimization
 530 # enabled (which happens e.g. when cross-compiling), the pool allocator may
 531 # get miscompiled.  Use -fno-strict-aliasing to work around this problem.
 532 # Since there is no reliable feature check for the presence of this bug,
 533 # we simply use a GCC version number check.  (This should never trigger for
 534 # stages 2 or 3 of a native bootstrap.)
 535 aliasing_flags=
 536 if test "$GCC" = yes; then
 537   saved_CXXFLAGS="$CXXFLAGS"
 538
 539   # The following test compilation will succeed if and only if $CXX accepts
 540   # -fno-strict-aliasing *and* is older than GCC 4.3.
 541   CXXFLAGS="$CXXFLAGS -fno-strict-aliasing"
 542   AC_MSG_CHECKING([whether $CXX is affected by placement new aliasing bug])
 543   AC_COMPILE_IFELSE([AC_LANG_SOURCE([
 544 #if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
 545 #error compiler not affected by placement new aliasing bug
 546 #endif
 547 ])],
 548     [AC_MSG_RESULT([yes]); aliasing_flags='-fno-strict-aliasing'],
 549     [AC_MSG_RESULT([no])])
 550
 551   CXXFLAGS="$saved_CXXFLAGS"
 552 fi
 553 AC_SUBST(aliasing_flags)
 554
 555
 556
 557 # ---------------------
 558 # Warnings and checking
 559 # ---------------------
 560
 561 # Check $CC warning features (if it's GCC).
 562 # We want to use -pedantic, but we don't want warnings about
 563 # * 'long long'
 564 # * variadic macros
 565 # * overlong strings
 566 # * C++11 narrowing conversions in { }
 567 # So, we only use -pedantic if we can disable those warnings.
 568
 569 # In stage 1, disable -Wformat warnings from old GCCs about new % codes
 570 AC_ARG_ENABLE(build-format-warnings,
 571   AS_HELP_STRING([--disable-build-format-warnings],[don't use -Wformat while building GCC]),
 572   [],[enable_build_format_warnings=yes])
 573 AS_IF([test $enable_build_format_warnings = no],
 574       [wf_opt=-Wno-format],[wf_opt=])
 575 ACX_PROG_CXX_WARNING_OPTS(
 576         m4_quote(m4_do([-W -Wall -Wno-narrowing -Wwrite-strings ],
 577                        [-Wcast-qual $wf_opt])),
 578                        [loose_warn])
 579 ACX_PROG_CC_WARNING_OPTS(
 580         m4_quote(m4_do([-Wstrict-prototypes -Wmissing-prototypes ],
 581                        [])), [c_loose_warn])
 582 ACX_PROG_CXX_WARNING_OPTS(
 583         m4_quote(m4_do([-Wmissing-format-attribute ],
 584                        [-Woverloaded-virtual])), [strict_warn])
 585 ACX_PROG_CC_WARNING_OPTS(
 586         m4_quote(m4_do([-Wold-style-definition -Wc++-compat])), [c_strict_warn])
 587 ACX_PROG_CXX_WARNING_ALMOST_PEDANTIC(
 588         m4_quote(m4_do([-Wno-long-long -Wno-variadic-macros ],
 589                        [-Wno-overlength-strings])), [strict_warn])
 590 ACX_PROG_CXX_WARNINGS_ARE_ERRORS([manual], [strict_warn])
 591
 592 # The above macros do nothing if the compiler is not GCC.  However, the
 593 # Makefile has more goo to add other flags, so these variables are used
 594 # to enable warnings only for GCC.
 595 warn_cflags=
 596 warn_cxxflags=
 597 if test "x$GCC" = "xyes"; then
 598   warn_cflags='$(GCC_WARN_CFLAGS)'
 599   warn_cxxflags='$(GCC_WARN_CXXFLAGS)'
 600 fi
 601 AC_SUBST(warn_cflags)
 602 AC_SUBST(warn_cxxflags)
 603
 604 # Disable exceptions and RTTI if building with g++
 605 ACX_PROG_CC_WARNING_OPTS(
 606         m4_quote(m4_do([-fno-exceptions -fno-rtti -fasynchronous-unwind-tables])),
 607                        [noexception_flags])
 608
 609 # Enable expensive internal checks
 610 is_release=
 611 if test x"`cat $srcdir/DEV-PHASE`" != xexperimental; then
 612   is_release=yes
 613 fi
 614
 615 AC_ARG_ENABLE(checking,
 616 [AS_HELP_STRING([[--enable-checking[=LIST]]],
 617                 [enable expensive run-time checks.  With LIST,
 618                  enable only specific categories of checks.
 619                  Categories are: yes,no,all,none,release.
 620                  Flags are: assert,df,extra,fold,gc,gcac,gimple,misc,
 621                  rtlflag,rtl,runtime,tree,valgrind,types])],
 622 [ac_checking_flags="${enableval}"],[
 623 # Determine the default checks.
 624 if test x$is_release = x ; then
 625   ac_checking_flags=yes,extra
 626 else
 627   ac_checking_flags=release
 628 fi])
 629 IFS="${IFS=     }"; ac_save_IFS="$IFS"; IFS="$IFS,"
 630 for check in release $ac_checking_flags
 631 do
 632         case $check in
 633         # these set all the flags to specific states
 634         yes)            ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking= ;
 635                         ac_fold_checking= ; ac_gc_checking=1 ; ac_extra_checking= ;
 636                         ac_gc_always_collect= ; ac_gimple_checking=1 ; ac_rtl_checking= ;
 637                         ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
 638                         ac_tree_checking=1 ; ac_valgrind_checking= ;
 639                         ac_types_checking=1 ;;
 640         no|none)        ac_assert_checking= ; ac_checking= ; ac_df_checking= ;
 641                         ac_fold_checking= ; ac_gc_checking= ; ac_extra_checking= ;
 642                         ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
 643                         ac_rtlflag_checking= ; ac_runtime_checking= ;
 644                         ac_tree_checking= ; ac_valgrind_checking= ;
 645                         ac_types_checking= ;;
 646         all)            ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking=1 ;
 647                         ac_fold_checking=1 ; ac_gc_checking=1 ; ac_extra_checking=1 ;
 648                         ac_gc_always_collect=1 ; ac_gimple_checking=1 ; ac_rtl_checking=1 ;
 649                         ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
 650                         ac_tree_checking=1 ; ac_valgrind_checking= ;
 651                         ac_types_checking=1 ;;
 652         release)        ac_assert_checking=1 ; ac_checking= ; ac_df_checking= ;
 653                         ac_fold_checking= ; ac_gc_checking= ; ac_extra_checking= ;
 654                         ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
 655                         ac_rtlflag_checking= ; ac_runtime_checking=1 ;
 656                         ac_tree_checking= ; ac_valgrind_checking= ;
 657                         ac_types_checking= ;;
 658         # these enable particular checks
 659         assert)         ac_assert_checking=1 ;;
 660         df)             ac_df_checking=1 ;;
 661         extra)          ac_extra_checking=1 ;;
 662         fold)           ac_fold_checking=1 ;;
 663         gc)             ac_gc_checking=1 ;;
 664         gcac)           ac_gc_always_collect=1 ;;
 665         gimple)         ac_gimple_checking=1 ;;
 666         misc)           ac_checking=1 ;;
 667         rtl)            ac_rtl_checking=1 ;;
 668         rtlflag)        ac_rtlflag_checking=1 ;;
 669         runtime)        ac_runtime_checking=1 ;;
 670         tree)           ac_tree_checking=1 ;;
 671         types)          ac_types_checking=1 ;;
 672         valgrind)       ac_valgrind_checking=1 ;;
 673         *)      AC_MSG_ERROR(unknown check category $check) ;;
 674         esac
 675 done
 676 IFS="$ac_save_IFS"
 677
 678 nocommon_flag=""
 679 if test x$ac_checking != x ; then
 680   AC_DEFINE(CHECKING_P, 1,
 681 [Define to 0/1 if you want more run-time sanity checks.  This one gets a grab
 682 bag of miscellaneous but relatively cheap checks.])
 683   nocommon_flag=-fno-common
 684 else
 685   AC_DEFINE(CHECKING_P, 0)
 686 fi
 687 AC_SUBST(nocommon_flag)
 688 if test x$ac_extra_checking != x ; then
 689   AC_DEFINE(ENABLE_EXTRA_CHECKING, 1,
 690 [Define to 0/1 if you want extra run-time checking that might affect code
 691 generation.])
 692 else
 693   AC_DEFINE(ENABLE_EXTRA_CHECKING, 0)
 694 fi
 695 if test x$ac_df_checking != x ; then
 696   AC_DEFINE(ENABLE_DF_CHECKING, 1,
 697 [Define if you want more run-time sanity checks for dataflow.])
 698 fi
 699 if test x$ac_assert_checking != x ; then
 700   AC_DEFINE(ENABLE_ASSERT_CHECKING, 1,
 701 [Define if you want assertions enabled.  This is a cheap check.])
 702 fi
 703 if test x$ac_gimple_checking != x ; then
 704   AC_DEFINE(ENABLE_GIMPLE_CHECKING, 1,
 705 [Define if you want operations on GIMPLE (the basic data structure of
 706 the high-level optimizers) to be checked for dynamic type safety at
 707 runtime.  This is moderately expensive.])
 708 fi
 709 GCC_TARGET_TEMPLATE(ENABLE_RUNTIME_CHECKING)
 710 if test x$ac_runtime_checking != x ; then
 711   AC_DEFINE(ENABLE_RUNTIME_CHECKING, 1,
 712 [Define if you want runtime assertions enabled.  This is a cheap check.])
 713 fi
 714 if test x$ac_tree_checking != x ; then
 715   AC_DEFINE(ENABLE_TREE_CHECKING, 1,
 716 [Define if you want all operations on trees (the basic data
 717    structure of the front ends) to be checked for dynamic type safety
 718    at runtime.  This is moderately expensive.
 719    ])
 720   TREECHECKING=yes
 721 fi
 722 if test x$ac_types_checking != x ; then
 723   AC_DEFINE(ENABLE_TYPES_CHECKING, 1,
 724 [Define if you want all gimple types to be verified after gimplifiation.
 725    This is cheap.
 726    ])
 727 fi
 728 AC_SUBST(TREECHECKING)
 729 if test x$ac_rtl_checking != x ; then
 730   AC_DEFINE(ENABLE_RTL_CHECKING, 1,
 731 [Define if you want all operations on RTL (the basic data structure
 732    of the optimizer and back end) to be checked for dynamic type safety
 733    at runtime.  This is quite expensive.])
 734 fi
 735 if test x$ac_rtlflag_checking != x ; then
 736   AC_DEFINE(ENABLE_RTL_FLAG_CHECKING, 1,
 737 [Define if you want RTL flag accesses to be checked against the RTL
 738    codes that are supported for each access macro.  This is relatively
 739    cheap.])
 740 fi
 741 if test x$ac_gc_checking != x ; then
 742   AC_DEFINE(ENABLE_GC_CHECKING, 1,
 743 [Define if you want the garbage collector to do object poisoning and
 744    other memory allocation checks.  This is quite expensive.])
 745 fi
 746 if test x$ac_gc_always_collect != x ; then
 747   AC_DEFINE(ENABLE_GC_ALWAYS_COLLECT, 1,
 748 [Define if you want the garbage collector to operate in maximally
 749    paranoid mode, validating the entire heap and collecting garbage at
 750    every opportunity.  This is extremely expensive.])
 751 fi
 752 if test x$ac_fold_checking != x ; then
 753   AC_DEFINE(ENABLE_FOLD_CHECKING, 1,
 754 [Define if you want fold checked that it never destructs its argument.
 755    This is quite expensive.])
 756 fi
 757 valgrind_path_defines=
 758 valgrind_command=
 759
 760 dnl # This check AC_REQUIREs various stuff, so it *must not* be inside
 761 dnl # an if statement.  This was the source of very frustrating bugs
 762 dnl # in converting to autoconf 2.5x!
 763 AC_CHECK_HEADER(valgrind.h, have_valgrind_h=yes, have_valgrind_h=no)
 764
 765 # It is certainly possible that there's valgrind but no valgrind.h.
 766 # GCC relies on making annotations so we must have both.
 767 AC_MSG_CHECKING(for VALGRIND_DISCARD in <valgrind/memcheck.h>)
 768 AC_PREPROC_IFELSE([AC_LANG_SOURCE(
 769   [[#include <valgrind/memcheck.h>
 770 #ifndef VALGRIND_DISCARD
 771 #error VALGRIND_DISCARD not defined
 772 #endif]])],
 773   [gcc_cv_header_valgrind_memcheck_h=yes],
 774   [gcc_cv_header_valgrind_memcheck_h=no])
 775 AC_MSG_RESULT($gcc_cv_header_valgrind_memcheck_h)
 776 AC_MSG_CHECKING(for VALGRIND_DISCARD in <memcheck.h>)
 777 AC_PREPROC_IFELSE([AC_LANG_SOURCE(
 778   [[#include <memcheck.h>
 779 #ifndef VALGRIND_DISCARD
 780 #error VALGRIND_DISCARD not defined
 781 #endif]])],
 782   [gcc_cv_header_memcheck_h=yes],
 783   [gcc_cv_header_memcheck_h=no])
 784 AC_MSG_RESULT($gcc_cv_header_memcheck_h)
 785 if test $gcc_cv_header_valgrind_memcheck_h = yes; then
 786   AC_DEFINE(HAVE_VALGRIND_MEMCHECK_H, 1,
 787         [Define if valgrind's valgrind/memcheck.h header is installed.])
 788 fi
 789 if test $gcc_cv_header_memcheck_h = yes; then
 790   AC_DEFINE(HAVE_MEMCHECK_H, 1,
 791         [Define if valgrind's memcheck.h header is installed.])
 792 fi
 793
 794 if test x$ac_valgrind_checking != x ; then
 795   AM_PATH_PROG_WITH_TEST(valgrind_path, valgrind,
 796         [$ac_dir/$ac_word --version | grep valgrind- >/dev/null 2>&1])
 797   if test "x$valgrind_path" = "x" \
 798     || (test $have_valgrind_h = no \
 799         && test $gcc_cv_header_memcheck_h = no \
 800         && test $gcc_cv_header_valgrind_memcheck_h = no); then
 801         AC_MSG_ERROR([*** Can't find both valgrind and valgrind/memcheck.h, memcheck.h or valgrind.h])
 802   fi
 803   valgrind_path_defines=-DVALGRIND_PATH='\"'$valgrind_path'\"'
 804   valgrind_command="$valgrind_path -q"
 805   AC_DEFINE(ENABLE_VALGRIND_CHECKING, 1,
 806 [Define if you want to run subprograms and generated programs
 807    through valgrind (a memory checker).  This is extremely expensive.])
 808 fi
 809 AC_SUBST(valgrind_path_defines)
 810 AC_SUBST(valgrind_command)
 811
 812 # Enable code coverage collection
 813 AC_ARG_ENABLE(coverage,
 814 [AS_HELP_STRING([[--enable-coverage[=LEVEL]]],
 815                 [enable compiler's code coverage collection.
 816                  Use to measure compiler performance and locate
 817                  unused parts of the compiler. With LEVEL, specify
 818                  optimization. Values are opt, noopt,
 819                  default is noopt])],
 820 [case "${enableval}" in
 821   yes|noopt)
 822     coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O0 -fkeep-static-functions"
 823     ;;
 824   opt)
 825     coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O2 -fkeep-static-functions"
 826     ;;
 827   no)
 828     # a.k.a. --disable-coverage
 829     coverage_flags=""
 830     ;;
 831   *)
 832     AC_MSG_ERROR(unknown coverage setting $enableval)
 833     ;;
 834 esac],
 835 [coverage_flags=""])
 836 AC_SUBST(coverage_flags)
 837
 838 AC_ARG_ENABLE(gather-detailed-mem-stats,
 839 [AS_HELP_STRING([--enable-gather-detailed-mem-stats],
 840                 [enable detailed memory allocation stats gathering])], [],
 841 [enable_gather_detailed_mem_stats=no])
 842 gather_stats=`if test $enable_gather_detailed_mem_stats != no; then echo 1; else echo 0; fi`
 843 AC_DEFINE_UNQUOTED(GATHER_STATISTICS, $gather_stats,
 844 [Define to enable detailed memory allocation stats gathering.])
 845
 846 AC_ARG_ENABLE(valgrind-annotations,
 847 [AS_HELP_STRING([--enable-valgrind-annotations],
 848                 [enable valgrind runtime interaction])], [],
 849 [enable_valgrind_annotations=no])
 850 if test x$enable_valgrind_annotations != xno \
 851     || test x$ac_valgrind_checking != x; then
 852   if (test $have_valgrind_h = no \
 853       && test $gcc_cv_header_memcheck_h = no \
 854       && test $gcc_cv_header_valgrind_memcheck_h = no); then
 855     AC_MSG_ERROR([*** Can't find valgrind/memcheck.h, memcheck.h or valgrind.h])
 856   fi
 857   AC_DEFINE(ENABLE_VALGRIND_ANNOTATIONS, 1,
 858 [Define to get calls to the valgrind runtime enabled.])
 859 fi
 860
 861 # -------------------------------
 862 # Miscenalleous configure options
 863 # -------------------------------
 864
 865 # Determine whether or not multilibs are enabled.
 866 AC_ARG_ENABLE(multilib,
 867 [AS_HELP_STRING([--enable-multilib],
 868                 [enable library support for multiple ABIs])],
 869 [], [enable_multilib=yes])
 870 AC_SUBST(enable_multilib)
 871
 872 # Determine whether or not multiarch is enabled.
 873 AC_ARG_ENABLE(multiarch,
 874 [AS_HELP_STRING([--enable-multiarch],
 875                 [enable support for multiarch paths])],
 876 [case "${enableval}" in
 877 yes|no|auto) enable_multiarch=$enableval;;
 878 *) AC_MSG_ERROR(bad value ${enableval} given for --enable-multiarch option) ;;
 879 esac], [enable_multiarch=auto])
 880 if test x${enable_multiarch} = xauto; then
 881   if test x${with_native_system_header_dir} != x; then
 882     ma_msg_suffix=", disabled auto check (configured with --native-system-header-dir)"
 883     enable_multiarch=no
 884   fi
 885   if test x$host != x$target && test "x$with_sysroot" = x; then
 886     ma_msg_suffix=", disabled auto check (cross build configured without --with-sysroot)"
 887     enable_multiarch=no
 888   fi
 889 fi
 890 if test x${enable_multiarch} = xyes; then
 891   AC_DEFINE(ENABLE_MULTIARCH, 1)
 892 fi
 893 AC_MSG_CHECKING(for multiarch configuration)
 894 AC_SUBST(enable_multiarch)
 895 AC_MSG_RESULT($enable_multiarch$ma_msg_suffix)
 896
 897 # needed for setting the multiarch name for soft-float/hard-float ABIs
 898 AC_SUBST(with_cpu)
 899 AC_SUBST(with_float)
 900
 901 # default stack clash protection guard size as power of twos in bytes.
 902 # Please keep these in sync with params.def.
 903 stk_clash_min=12
 904 stk_clash_max=30
 905
 906 # Keep the default value when the option is not used to 0, this allows us to
 907 # distinguish between the cases where the user specifially set a value via
 908 # configure and when the normal default value is used.
 909 AC_ARG_WITH(stack-clash-protection-guard-size,
 910 [AS_HELP_STRING([--with-stack-clash-protection-guard-size=size],
 911 [Set the default stack clash protection guard size for specific targets as a power of two in bytes.])],
 912 [DEFAULT_STK_CLASH_GUARD_SIZE="$with_stack_clash_protection_guard_size"], [DEFAULT_STK_CLASH_GUARD_SIZE=0])
 913 if test $DEFAULT_STK_CLASH_GUARD_SIZE -ne 0 \
 914      && (test $DEFAULT_STK_CLASH_GUARD_SIZE -lt $stk_clash_min \
 915          || test $DEFAULT_STK_CLASH_GUARD_SIZE -gt $stk_clash_max); then
 916   AC_MSG_ERROR(m4_normalize([
 917                 Invalid value $DEFAULT_STK_CLASH_GUARD_SIZE for --with-stack-clash-protection-guard-size. \
 918                 Must be between $stk_clash_min and $stk_clash_max.]))
 919 fi
 920
 921 AC_DEFINE_UNQUOTED(DEFAULT_STK_CLASH_GUARD_SIZE, $DEFAULT_STK_CLASH_GUARD_SIZE,
 922         [Define to larger than zero set the default stack clash protector size.])
 923
 924 # Enable __cxa_atexit for C++.
 925 AC_ARG_ENABLE(__cxa_atexit,
 926 [AS_HELP_STRING([--enable-__cxa_atexit], [enable __cxa_atexit for C++])],
 927 [], [])
 928
 929 # Enable C extension for decimal float if target supports it.
 930 GCC_AC_ENABLE_DECIMAL_FLOAT([$target])
 931
 932 dfp=`if test $enable_decimal_float != no; then echo 1; else echo 0; fi`
 933 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_FLOAT, $dfp,
 934 [Define to 1 to enable decimal float extension to C.])
 935
 936 # Use default_decimal_float for dependency.
 937 enable_decimal_float=$default_decimal_float
 938
 939 bid=`if test $enable_decimal_float = bid; then echo 1; else echo 0; fi`
 940 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_BID_FORMAT, $bid,
 941 [Define to 1 to specify that we are using the BID decimal floating
 942 point format instead of DPD])
 943
 944 # Enable C extension for fixed-point arithmetic.
 945 AC_ARG_ENABLE(fixed-point,
 946 [AS_HELP_STRING([--enable-fixed-point],
 947                 [enable fixed-point arithmetic extension to C])],
 948 [],
 949 [
 950   case $target in
 951     arm*)
 952       enable_fixed_point=yes
 953       ;;
 954
 955     mips*-*-*)
 956       enable_fixed_point=yes
 957       ;;
 958     loongarch*-*-*)
 959       enable_fixed_point=yes
 960       ;;
 961     *)
 962       AC_MSG_WARN([fixed-point is not supported for this target, ignored])
 963       enable_fixed_point=no
 964       ;;
 965   esac
 966 ])
 967 AC_SUBST(enable_fixed_point)
 968
 969 fixedpoint=`if test $enable_fixed_point = yes; then echo 1; else echo 0; fi`
 970 AC_DEFINE_UNQUOTED(ENABLE_FIXED_POINT, $fixedpoint,
 971 [Define to 1 to enable fixed-point arithmetic extension to C.])
 972
 973 # Enable threads
 974 # Pass with no value to take the default
 975 # Pass with a value to specify a thread package
 976 AC_ARG_ENABLE(threads,
 977 [AS_HELP_STRING([[--enable-threads[=LIB]]],
 978                 [enable thread usage for target GCC,
 979                  using LIB thread package])],,
 980 [enable_threads=''])
 981
 982 AC_ARG_ENABLE(tls,
 983 [AS_HELP_STRING([--enable-tls],
 984                 [enable or disable generation of tls code
 985                  overriding the assembler check for tls support])],
 986 [
 987   case $enable_tls in
 988     yes | no) ;;
 989     *) AC_MSG_ERROR(['$enable_tls' is an invalid value for --enable-tls.
 990 Valid choices are 'yes' and 'no'.]) ;;
 991   esac
 992 ], [enable_tls=''])
 993
 994 AC_ARG_ENABLE(vtable-verify,
 995 [AS_HELP_STRING([--enable-vtable-verify],
 996                 [enable vtable verification feature])],,
 997 [enable_vtable_verify=no])
 998 vtable_verify=`if test x$enable_vtable_verify = xyes; then echo 1; else echo 0; fi`
 999 AC_DEFINE_UNQUOTED(ENABLE_VTABLE_VERIFY, $vtable_verify,
1000 [Define 0/1 if vtable verification feature is enabled.])
1001
1002 AC_ARG_ENABLE(analyzer,
1003 [AS_HELP_STRING([--disable-analyzer],
1004                 [disable -fanalyzer static analyzer])],
1005 if test x$enable_analyzer = xno; then
1006         analyzer=0
1007 else
1008         analyzer=1
1009 fi,
1010 analyzer=1)
1011 AC_DEFINE_UNQUOTED(ENABLE_ANALYZER, $analyzer,
1012 [Define 0/1 if static analyzer feature is enabled.])
1013
1014 AC_ARG_ENABLE(objc-gc,
1015 [AS_HELP_STRING([--enable-objc-gc],
1016                 [enable the use of Boehm's garbage collector with
1017                  the GNU Objective-C runtime])],
1018 if test x$enable_objc_gc = xno; then
1019         objc_boehm_gc=''
1020 else
1021         objc_boehm_gc=1
1022 fi,
1023 objc_boehm_gc='')
1024
1025 AC_ARG_WITH(dwarf2,
1026 [AS_HELP_STRING([--with-dwarf2], [force the default debug format to be DWARF 2])],
1027 dwarf2="$with_dwarf2",
1028 dwarf2=no)
1029
1030 AC_ARG_ENABLE(shared,
1031 [AS_HELP_STRING([--disable-shared], [don't provide a shared libgcc])],
1032 [
1033   case $enable_shared in
1034   yes | no) ;;
1035   *)
1036     enable_shared=no
1037     IFS="${IFS=         }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
1038     for pkg in $enableval; do
1039       if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
1040         enable_shared=yes
1041       fi
1042     done
1043     IFS="$ac_save_ifs"
1044     ;;
1045   esac
1046 ], [enable_shared=yes])
1047 AC_SUBST(enable_shared)
1048
1049 AC_ARG_ENABLE(gcov,
1050 [  --disable-gcov          don't provide libgcov and related host tools],
1051 [], [case $target in
1052        bpf-*-*)
1053          enable_gcov=no
1054        ;;
1055        *)
1056          enable_gcov=yes
1057        ;;
1058      esac])
1059
1060 AC_SUBST(enable_gcov)
1061
1062 AC_ARG_WITH(specs,
1063   [AS_HELP_STRING([--with-specs=SPECS],
1064                   [add SPECS to driver command-line processing])],
1065   [CONFIGURE_SPECS=$withval],
1066   [CONFIGURE_SPECS=]
1067 )
1068 AC_SUBST(CONFIGURE_SPECS)
1069
1070 ACX_PKGVERSION([GCC])
1071 ACX_BUGURL([https://gcc.gnu.org/bugs/])
1072
1073 # Allow overriding the default URL for documentation
1074 AC_ARG_WITH(documentation-root-url,
1075     AS_HELP_STRING([--with-documentation-root-url=URL],
1076                    [Root for documentation URLs]),
1077     [case "$withval" in
1078       yes) AC_MSG_ERROR([documentation root URL not specified]) ;;
1079       no)  AC_MSG_ERROR([documentation root URL not specified]) ;;
1080       */)  DOCUMENTATION_ROOT_URL="$withval" ;;
1081       *)   AC_MSG_ERROR([documentation root URL does not end with /]) ;;
1082      esac],
1083      DOCUMENTATION_ROOT_URL="https://gcc.gnu.org/onlinedocs/"
1084 )
1085 AC_DEFINE_UNQUOTED(DOCUMENTATION_ROOT_URL,"$DOCUMENTATION_ROOT_URL",
1086         [Define to the root for documentation URLs.])
1087
1088 # Allow overriding the default URL for GCC changes
1089 AC_ARG_WITH(changes-root-url,
1090     AS_HELP_STRING([--with-changes-root-url=URL],
1091                    [Root for GCC changes URLs]),
1092     [case "$withval" in
1093       yes) AC_MSG_ERROR([changes root URL not specified]) ;;
1094       no)  AC_MSG_ERROR([changes root URL not specified]) ;;
1095       */)  CHANGES_ROOT_URL="$withval" ;;
1096       *)   AC_MSG_ERROR([changes root URL does not end with /]) ;;
1097      esac],
1098      CHANGES_ROOT_URL="https://gcc.gnu.org/"
1099 )
1100 AC_DEFINE_UNQUOTED(CHANGES_ROOT_URL,"$CHANGES_ROOT_URL",
1101         [Define to the root for URLs about GCC changes.])
1102
1103 # Sanity check enable_languages in case someone does not run the toplevel
1104 # configure # script.
1105 AC_ARG_ENABLE(languages,
1106 [AS_HELP_STRING([--enable-languages=LIST], [specify which front-ends to build])],
1107 [case ,${enable_languages}, in
1108        ,,|,yes,)
1109                 # go safe -- we cannot be much sure without the toplevel
1110                 # configure's
1111                 # analysis of which target libs are present and usable
1112                 enable_languages=c
1113                 ;;
1114          *,all,*)
1115                 AC_MSG_ERROR([only the toplevel supports --enable-languages=all])
1116                 ;;
1117         *,c,*)
1118                 ;;
1119         *)
1120                 enable_languages=c,${enable_languages}
1121                 ;;
1122 esac],
1123 [enable_languages=c])
1124
1125 # If top-level libada has been disabled, then wire in install-gnatlib
1126 # invocation with `make install', so that one can build and install
1127 # the library manually with `make -C gcc all gnatlib gnattools install'.
1128 if test x"$enable_libada" = xno; then
1129   gnat_install_lib=gnat-install-lib
1130 else
1131   gnat_install_lib=
1132 fi
1133 AC_SUBST(gnat_install_lib)
1134
1135 if test x"$enable_as_accelerator_for" != x; then
1136   AC_DEFINE(ACCEL_COMPILER, 1,
1137     [Define if this compiler should be built as the offload target compiler.])
1138   enable_as_accelerator=yes
1139   case "${target}" in
1140     *-intelmicemul-*)
1141       # In this case we expect offload compiler to be built as native, so we
1142       # need to rename the driver to avoid clashes with host's drivers.
1143       program_transform_name="s&^&${target}-&" ;;
1144   esac
1145   sedscript="s#${target_noncanonical}#${enable_as_accelerator_for}-accel-${target_noncanonical}#"
1146   program_transform_name=`echo $program_transform_name | sed $sedscript`
1147   accel_dir_suffix=/accel/${target_noncanonical}
1148   real_target_noncanonical=${enable_as_accelerator_for}
1149 fi
1150 AC_SUBST(enable_as_accelerator)
1151 AC_SUBST(real_target_noncanonical)
1152 AC_SUBST(accel_dir_suffix)
1153
1154 for tgt in `echo $enable_offload_targets | sed 's/,/ /g'`; do
1155   tgt=`echo $tgt | sed 's/=.*//'`
1156
1157   enable_offloading=1
1158   case "$tgt" in
1159     *-intelmic-* | *-intelmicemul-*)
1160         omp_device_property=omp-device-properties-i386
1161         omp_device_property_tmake_file="${omp_device_property_tmake_file} \$(srcdir)/config/i386/t-omp-device"
1162         ;;
1163     amdgcn*)
1164         omp_device_property=omp-device-properties-gcn
1165         omp_device_property_tmake_file="${omp_device_property_tmake_file} \$(srcdir)/config/gcn/t-omp-device"
1166         ;;
1167     nvptx*)
1168         omp_device_property=omp-device-properties-nvptx
1169         omp_device_property_tmake_file="${omp_device_property_tmake_file} \$(srcdir)/config/nvptx/t-omp-device"
1170         ;;
1171     *)
1172         AC_MSG_ERROR([unknown offload target specified])
1173         ;;
1174   esac
1175   omp_device_properties="${omp_device_properties} ${tgt}=${omp_device_property}"
1176   omp_device_property_deps="${omp_device_property_deps} ${omp_device_property}"
1177
1178   if test x"$offload_targets" = x; then
1179     offload_targets=$tgt
1180   else
1181     offload_targets="$offload_targets,$tgt"
1182   fi
1183 done
1184 AC_SUBST(omp_device_properties)
1185 AC_SUBST(omp_device_property_deps)
1186
1187 AC_DEFINE_UNQUOTED(OFFLOAD_TARGETS, "$offload_targets",
1188   [Define to offload targets, separated by commas.])
1189 if test x"$enable_offloading" != x; then
1190   AC_DEFINE(ENABLE_OFFLOADING, 1,
1191     [Define this to enable support for offloading.])
1192 else
1193   AC_DEFINE(ENABLE_OFFLOADING, 0,
1194     [Define this to enable support for offloading.])
1195 fi
1196
1197 if test "x$enable_offload_defaulted" = xyes; then
1198   AC_DEFINE(OFFLOAD_DEFAULTED, 1,
1199     [Define to 1 to if -foffload is defaulted])
1200 fi
1201
1202 AC_ARG_WITH(multilib-list,
1203 [AS_HELP_STRING([--with-multilib-list], [select multilibs (AArch64, ARM, AVR, OR1K, RISC-V, SH and x86-64 only)])],
1204 :,
1205 with_multilib_list=default)
1206
1207 AC_ARG_WITH(multilib-generator,
1208 [AS_HELP_STRING([--with-multilib-generator], [Multi-libs configuration string (RISC-V only)])],
1209 :,
1210 with_multilib_generator=default)
1211
1212 # -------------------------
1213 # Checks for other programs
1214 # -------------------------
1215
1216 AC_PROG_MAKE_SET
1217
1218 # Find some useful tools
1219 AC_PROG_AWK
1220 # We need awk to create options.cc and options.h.
1221 # Bail out if it's missing.
1222 case ${AWK} in
1223   "") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
1224 esac
1225
1226 gcc_AC_PROG_LN_S
1227 ACX_PROG_LN($LN_S)
1228 AC_PROG_RANLIB
1229 ranlib_flags=""
1230 AC_SUBST(ranlib_flags)
1231
1232 gcc_AC_PROG_INSTALL
1233
1234 # See if cmp has --ignore-initial.
1235 gcc_AC_PROG_CMP_IGNORE_INITIAL
1236
1237 # See if we have the mktemp command.
1238 AC_CHECK_PROG(have_mktemp_command, mktemp, yes, no)
1239
1240 # See if makeinfo has been installed and is modern enough
1241 # that we can use it.
1242 ACX_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
1243   [GNU texinfo.* \([0-9][0-9.]*\)],
1244   [4.[7-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
1245 if test $gcc_cv_prog_makeinfo_modern = no; then
1246   AC_MSG_WARN([
1247 *** Makeinfo is missing or too old.
1248 *** Info documentation will not be built.])
1249   BUILD_INFO=
1250 else
1251   BUILD_INFO=info
1252 fi
1253 AC_SUBST(BUILD_INFO)
1254
1255 # Is pod2man recent enough to regenerate manpages?
1256 AC_MSG_CHECKING([for recent Pod::Man])
1257 if (perl -e 'use 1.10 Pod::Man') >/dev/null 2>&1; then
1258   AC_MSG_RESULT(yes)
1259   GENERATED_MANPAGES=generated-manpages
1260 else
1261   AC_MSG_RESULT(no)
1262   GENERATED_MANPAGES=
1263 fi
1264 AC_SUBST(GENERATED_MANPAGES)
1265
1266 MISSING="${CONFIG_SHELL-/bin/sh} $ac_aux_dir/missing"
1267
1268 # How about lex?
1269 dnl Don't use AC_PROG_LEX; we insist on flex.
1270 dnl LEXLIB is not useful in gcc.
1271 AC_CHECK_PROGS([FLEX], flex, [$MISSING flex])
1272
1273 # Bison?
1274 AC_CHECK_PROGS([BISON], bison, [$MISSING bison])
1275
1276 # Binutils are not build modules, unlike bison/flex/makeinfo.  So we
1277 # check for build == host before using them.
1278
1279 # NM
1280 if test x${build} = x${host} && test -f $srcdir/../binutils/nm.c \
1281   && test -d ../binutils ; then
1282   NM='${objdir}/../binutils/nm-new'
1283 else
1284   AC_CHECK_PROG(NM, nm, nm, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing nm)
1285 fi
1286
1287 # AR
1288 if test x${build} = x${host} && test -f $srcdir/../binutils/ar.c \
1289   && test -d ../binutils ; then
1290   AR='${objdir}/../binutils/ar'
1291 else
1292   AC_CHECK_PROG(AR, ar, ar, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing ar)
1293 fi
1294
1295 # The jit documentation looks better if built with sphinx, but can be
1296 # built with texinfo if sphinx is not available.
1297 # Set "doc_build_sys" to "sphinx" or "texinfo" accordingly.
1298 AC_CHECK_PROG(doc_build_sys, sphinx-build, sphinx, texinfo)
1299
1300 # --------------------
1301 # Checks for C headers
1302 # --------------------
1303
1304 # Need to reject headers which give warnings, so that the -Werror bootstrap
1305 # works later. *sigh*  This needs to come before all header checks.
1306 AC_PROG_CPP_WERROR
1307
1308 AC_HEADER_STDC
1309 AC_HEADER_TIME
1310 ACX_HEADER_STRING
1311 AC_HEADER_SYS_WAIT
1312 AC_HEADER_TIOCGWINSZ
1313 AC_CHECK_HEADERS(limits.h stddef.h string.h strings.h stdlib.h time.h iconv.h \
1314                  fcntl.h ftw.h unistd.h sys/auxv.h sys/file.h sys/time.h sys/mman.h \
1315                  sys/resource.h sys/param.h sys/times.h sys/stat.h sys/locking.h \
1316                  direct.h malloc.h langinfo.h ldfcn.h locale.h wchar.h)
1317
1318 # Check for thread headers.
1319 AC_CHECK_HEADER(thread.h, [have_thread_h=yes], [have_thread_h=])
1320 AC_CHECK_HEADER(pthread.h, [have_pthread_h=yes], [have_pthread_h=])
1321
1322 # These tests can't be done till we know if we have limits.h.
1323 gcc_AC_C_CHAR_BIT
1324 AC_C_BIGENDIAN
1325
1326 # ----------------------
1327 # Checks for C++ headers
1328 # ----------------------
1329
1330 dnl Autoconf will give an error in the configure script if there is no
1331 dnl C++ preprocessor.  Hack to prevent that.
1332 m4_pushdef([AC_MSG_ERROR], m4_defn([AC_MSG_WARN]))[]dnl
1333 AC_PROG_CXXCPP
1334 m4_popdef([AC_MSG_ERROR])[]dnl
1335
1336 AC_CHECK_HEADERS(unordered_map)
1337 AC_CHECK_HEADERS(tr1/unordered_map)
1338 AC_CHECK_HEADERS(ext/hash_map)
1339
1340 # --------
1341 # Dependency checking.
1342 # --------
1343
1344 ZW_CREATE_DEPDIR
1345 AC_CONFIG_COMMANDS([gccdepdir],[
1346   ${CONFIG_SHELL-/bin/sh} $ac_aux_dir/mkinstalldirs build/$DEPDIR
1347   for lang in $subdirs c-family common analyzer rtl-ssa
1348   do
1349       ${CONFIG_SHELL-/bin/sh} $ac_aux_dir/mkinstalldirs $lang/$DEPDIR
1350   done], [subdirs="$subdirs" ac_aux_dir=$ac_aux_dir DEPDIR=$DEPDIR])
1351
1352 ZW_PROG_COMPILER_DEPENDENCIES([CXX])
1353
1354 # --------
1355 # UNSORTED
1356 # --------
1357
1358
1359 # These libraries may be used by collect2.
1360 # We may need a special search path to get them linked.
1361 AC_CACHE_CHECK(for collect2 libraries, gcc_cv_collect2_libs,
1362 [save_LIBS="$LIBS"
1363 for libs in '' -lld -lmld \
1364                 '-L/usr/lib/cmplrs/cc2.11 -lmld' \
1365                 '-L/usr/lib/cmplrs/cc3.11 -lmld'
1366 do
1367         LIBS="$libs"
1368         AC_TRY_LINK_FUNC(ldopen,
1369                 [gcc_cv_collect2_libs="$libs"; break])
1370 done
1371 LIBS="$save_LIBS"
1372 test -z "$gcc_cv_collect2_libs" && gcc_cv_collect2_libs='none required'])
1373 case $gcc_cv_collect2_libs in
1374         "none required")        ;;
1375         *)      COLLECT2_LIBS=$gcc_cv_collect2_libs ;;
1376 esac
1377 AC_SUBST(COLLECT2_LIBS)
1378
1379 # When building Ada code on Alpha, we need exc_resume which is usually in
1380 # -lexc.  So test for it.
1381 save_LIBS="$LIBS"
1382 LIBS=
1383 AC_SEARCH_LIBS(exc_resume, exc)
1384 GNAT_LIBEXC="$LIBS"
1385 LIBS="$save_LIBS"
1386 AC_SUBST(GNAT_LIBEXC)
1387
1388 # To support -mcpu=native on Solaris/SPARC, we need libkstat.
1389 save_LIBS="$LIBS"
1390 LIBS=
1391 AC_SEARCH_LIBS(kstat_open, kstat)
1392 EXTRA_GCC_LIBS="$LIBS"
1393 LIBS="$save_LIBS"
1394 AC_SUBST(EXTRA_GCC_LIBS)
1395
1396 # Solaris needs libsocket and libnsl for socket functions before 11.4.
1397 # C++ needs those for libcody.
1398 save_LIBS="$LIBS"
1399 LIBS=
1400 AX_LIB_SOCKET_NSL
1401 NETLIBS="$LIBS"
1402 LIBS="$save_LIBS"
1403 AC_SUBST(NETLIBS)
1404
1405 # Some systems put ldexp and frexp in libm instead of libc; assume
1406 # they're both in the same place.  jcf-dump needs them.
1407 save_LIBS="$LIBS"
1408 LIBS=
1409 AC_SEARCH_LIBS(ldexp, m)
1410 LDEXP_LIB="$LIBS"
1411 LIBS="$save_LIBS"
1412 AC_SUBST(LDEXP_LIB)
1413
1414 # Some systems need dlopen
1415 save_LIBS="$LIBS"
1416 LIBS=
1417 AC_SEARCH_LIBS(dlopen, dl)
1418 DL_LIB="$LIBS"
1419 LIBS="$save_LIBS"
1420 AC_SUBST(DL_LIB)
1421
1422 # Use <inttypes.h> only if it exists,
1423 # doesn't clash with <sys/types.h>, declares intmax_t and defines
1424 # PRId64
1425 AC_MSG_CHECKING(for inttypes.h)
1426 AC_CACHE_VAL(gcc_cv_header_inttypes_h,
1427 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
1428 [[#define __STDC_FORMAT_MACROS
1429 #include <sys/types.h>
1430 #include <inttypes.h>]],
1431   [[intmax_t i = -1;
1432 #ifndef PRId64
1433 choke me
1434 #endif]])],
1435   [gcc_cv_header_inttypes_h=yes],
1436   [gcc_cv_header_inttypes_h=no])])
1437 AC_MSG_RESULT($gcc_cv_header_inttypes_h)
1438 if test $gcc_cv_header_inttypes_h = yes; then
1439   AC_DEFINE(HAVE_INTTYPES_H, 1,
1440         [Define if you have a working <inttypes.h> header file.])
1441 fi
1442
1443 # Look for the ZSTD package.
1444 ZSTD_INCLUDE=
1445 ZSTD_LIB=
1446 AC_SUBST(ZSTD_INCLUDE)
1447 AC_SUBST(ZSTD_LIB)
1448 ZSTD_CPPFLAGS=
1449 ZSTD_LDFLAGS=
1450 AC_SUBST(ZSTD_CPPFLAGS)
1451 AC_SUBST(ZSTD_LDFLAGS)
1452 AC_ARG_WITH(zstd,
1453         [AS_HELP_STRING([--with-zstd=PATH],
1454                 [specify prefix directory for installed zstd library.
1455                  Equivalent to --with-zstd-include=PATH/include
1456                  plus --with-zstd-lib=PATH/lib])])
1457 AC_ARG_WITH(zstd-include,
1458         [AS_HELP_STRING([--with-zstd-include=PATH],
1459                 [specify directory for installed zstd include files])])
1460 AC_ARG_WITH(zstd-lib,
1461         [AS_HELP_STRING([--with-zstd-lib=PATH],
1462                 [specify directory for the installed zstd library])])
1463 case "x$with_zstd" in
1464   x) ;;
1465   xno)
1466     ZSTD_INCLUDE=
1467     ZSTD_LIB=
1468     ;;
1469   *) ZSTD_INCLUDE=$with_zstd/include
1470      ZSTD_LIB=$with_zstd/lib
1471      ;;
1472 esac
1473
1474 if test "x$with_zstd" != xno; then
1475 if test "x$with_zstd_include" != x; then
1476   ZSTD_INCLUDE=$with_zstd_include
1477 fi
1478 if test "x$with_zstd_lib" != x; then
1479   ZSTD_LIB=$with_zstd_lib
1480 fi
1481 if test "x$ZSTD_INCLUDE" != x \
1482    && test "x$ZSTD_INCLUDE" != xno; then
1483   ZSTD_CPPFLAGS=-I$ZSTD_INCLUDE
1484 fi
1485 if test "x$ZSTD_LIB" != x \
1486    && test "x$ZSTD_LIB" != xno; then
1487   ZSTD_LDFLAGS=-L$ZSTD_LIB
1488 fi
1489
1490 CXXFLAGS="$CXXFLAGS $ZSTD_CPPFLAGS"
1491 LDFLAGS="$LDFLAGS $ZSTD_LDFLAGS"
1492
1493 AC_MSG_CHECKING(for zstd.h)
1494 AC_CACHE_VAL(gcc_cv_header_zstd_h,
1495 # We require version 1.3.0 or later.  This is the first version that has
1496 # ZSTD_getFrameContentSize.
1497 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
1498 [[#include <zstd.h>
1499 #if ZSTD_VERSION_NUMBER < 10300
1500 #error "need zstd 1.3.0 or better"
1501 #endif]])],
1502   [gcc_cv_header_zstd_h=yes],
1503   [gcc_cv_header_zstd_h=no])])
1504 AC_MSG_RESULT($gcc_cv_header_zstd_h)
1505 if test $gcc_cv_header_zstd_h = yes; then
1506   AC_DEFINE(HAVE_ZSTD_H, 1,
1507         [Define if you have a working <zstd.h> header file.])
1508 elif test "x$with_zstd" != x; then
1509     as_fn_error $? "Unable to find zstd.h.  See config.log for details." "$LINENO" 5
1510 fi
1511
1512 # LTO can use zstd compression algorithm
1513 save_LIBS="$LIBS"
1514 LIBS=
1515 AC_SEARCH_LIBS(ZSTD_compress, zstd)
1516 ZSTD_LIB="$LIBS"
1517 LIBS="$save_LIBS"
1518 AC_SUBST(ZSTD_LIB)
1519 fi
1520
1521 dnl Disabled until we have a complete test for buggy enum bitfields.
1522 dnl gcc_AC_C_ENUM_BF_UNSIGNED
1523
1524 define(gcc_UNLOCKED_FUNCS, clearerr_unlocked feof_unlocked dnl
1525   ferror_unlocked fflush_unlocked fgetc_unlocked fgets_unlocked dnl
1526   fileno_unlocked fprintf_unlocked fputc_unlocked fputs_unlocked dnl
1527   fread_unlocked fwrite_unlocked getchar_unlocked getc_unlocked dnl
1528   putchar_unlocked putc_unlocked)
1529 AC_CHECK_FUNCS(times clock kill getrlimit setrlimit atoq \
1530         popen sysconf strsignal getrusage nl_langinfo \
1531         gettimeofday mbstowcs wcswidth mmap posix_fallocate setlocale \
1532         gcc_UNLOCKED_FUNCS madvise mallinfo mallinfo2 fstatat getauxval)
1533
1534 if test x$ac_cv_func_mbstowcs = xyes; then
1535   AC_CACHE_CHECK(whether mbstowcs works, gcc_cv_func_mbstowcs_works,
1536 [    AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <stdlib.h>
1537 int main()
1538 {
1539   mbstowcs(0, "", 0);
1540   return 0;
1541 }]])],
1542     [gcc_cv_func_mbstowcs_works=yes],
1543     [gcc_cv_func_mbstowcs_works=no],
1544     [gcc_cv_func_mbstowcs_works=yes])])
1545   if test x$gcc_cv_func_mbstowcs_works = xyes; then
1546     AC_DEFINE(HAVE_WORKING_MBSTOWCS, 1,
1547   [Define this macro if mbstowcs does not crash when its
1548    first argument is NULL.])
1549   fi
1550 fi
1551
1552 AC_CHECK_TYPE(ssize_t, int)
1553 AC_CHECK_TYPE(caddr_t, char *)
1554 AC_CHECK_TYPE(sighander_t,
1555   AC_DEFINE(HAVE_SIGHANDLER_T, 1,
1556     [Define if <sys/signal.h> defines sighandler_t]),
1557     ,signal.h)
1558
1559 GCC_AC_FUNC_MMAP_BLACKLIST
1560
1561 case "${host}" in
1562 *-*-*vms*)
1563   # Under VMS, vfork works very differently than on Unix. The standard test
1564   # won't work, and it isn't easily adaptable. It makes more sense to
1565   # just force it.
1566   ac_cv_func_vfork_works=yes
1567   ;;
1568 esac
1569 AC_FUNC_FORK
1570
1571 AM_ICONV
1572
1573 # Until we have in-tree GNU iconv:
1574 LIBICONV_DEP=
1575 if test -f "$LTLIBICONV"; then
1576   LIBICONV_DEP=$LTLIBICONV
1577 fi
1578 AC_SUBST(LIBICONV_DEP)
1579
1580 AM_LC_MESSAGES
1581
1582 AM_LANGINFO_CODESET
1583
1584 # We will need to find libiberty.h and ansidecl.h
1585 saved_CFLAGS="$CFLAGS"
1586 CFLAGS="$CFLAGS -I${srcdir} -I${srcdir}/../include $GMPINC"
1587 saved_CXXFLAGS="$CXXFLAGS"
1588 CXXFLAGS="$CXXFLAGS -I${srcdir} -I${srcdir}/../include $GMPINC"
1589
1590 # gcc_AC_CHECK_DECLS doesn't support overloaded functions, so use the
1591 # normal autoconf function for these.  But force definition of
1592 # HAVE_DECL_BASENAME like gcc_AC_CHECK_DECLS does, to suppress the bizarre
1593 # basename handling in libiberty.h.
1594 AC_CHECK_DECLS([basename(const char*), strstr(const char*,const char*)], , ,[
1595 #undef HAVE_DECL_BASENAME
1596 #define HAVE_DECL_BASENAME 1
1597 #include "ansidecl.h"
1598 #include "system.h"])
1599
1600 gcc_AC_CHECK_DECLS(getenv atol atoll asprintf sbrk abort atof getcwd getwd \
1601         madvise stpcpy strnlen strsignal strverscmp \
1602         strtol strtoul strtoll strtoull setenv unsetenv \
1603         errno snprintf vsnprintf vasprintf malloc realloc calloc \
1604         free getopt clock getpagesize ffs gcc_UNLOCKED_FUNCS, , ,[
1605 #include "ansidecl.h"
1606 #include "system.h"])
1607
1608 gcc_AC_CHECK_DECLS(getrlimit setrlimit getrusage, , ,[
1609 #include "ansidecl.h"
1610 #include "system.h"
1611 #ifdef HAVE_SYS_RESOURCE_H
1612 #include <sys/resource.h>
1613 #endif
1614 ])
1615
1616 gcc_AC_CHECK_DECLS(mallinfo mallinfo2, , ,[
1617 #include "ansidecl.h"
1618 #include "system.h"
1619 #ifdef HAVE_MALLOC_H
1620 #include <malloc.h>
1621 #endif
1622 ])
1623
1624 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1625 #include "ansidecl.h"
1626 #include "system.h"
1627 #ifdef HAVE_SYS_RESOURCE_H
1628 #include <sys/resource.h>
1629 #endif
1630 ]], [[rlim_t l = 0;]])],[],[AC_DEFINE([rlim_t],[long],
1631 [Define to `long' if <sys/resource.h> doesn't define.])])
1632
1633 # On AIX 5.2, <ldfcn.h> conflicts with <fcntl.h>, as both define incompatible
1634 # FREAD and FWRITE macros.  Fortunately, for GCC's single usage of ldgetname
1635 # in collect2.cc, <fcntl.h> isn't visible, but the configure test below needs
1636 # to undef these macros to get the correct value for HAVE_DECL_LDGETNAME.
1637 gcc_AC_CHECK_DECLS(ldgetname, , ,[
1638 #include "ansidecl.h"
1639 #include "system.h"
1640 #ifdef HAVE_LDFCN_H
1641 #undef FREAD
1642 #undef FWRITE
1643 #include <ldfcn.h>
1644 #endif
1645 ])
1646
1647 gcc_AC_CHECK_DECLS(times, , ,[
1648 #include "ansidecl.h"
1649 #include "system.h"
1650 #ifdef HAVE_SYS_TIMES_H
1651 #include <sys/times.h>
1652 #endif
1653 ])
1654
1655 gcc_AC_CHECK_DECLS(sigaltstack, , ,[
1656 #include "ansidecl.h"
1657 #include "system.h"
1658 #include <signal.h>
1659 ])
1660
1661 # More time-related stuff.
1662 AC_CACHE_CHECK(for struct tms, ac_cv_struct_tms, [
1663 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1664 #include "ansidecl.h"
1665 #include "system.h"
1666 #ifdef HAVE_SYS_TIMES_H
1667 #include <sys/times.h>
1668 #endif
1669 ]], [[struct tms tms;]])],[ac_cv_struct_tms=yes],[ac_cv_struct_tms=no])])
1670 if test $ac_cv_struct_tms = yes; then
1671   AC_DEFINE(HAVE_STRUCT_TMS, 1,
1672   [Define if <sys/times.h> defines struct tms.])
1673 fi
1674
1675 # use gcc_cv_* here because this doesn't match the behavior of AC_CHECK_TYPE.
1676 # revisit after autoconf 2.50.
1677 AC_CACHE_CHECK(for clock_t, gcc_cv_type_clock_t, [
1678 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1679 #include "ansidecl.h"
1680 #include "system.h"
1681 ]], [[clock_t x;]])],[gcc_cv_type_clock_t=yes],[gcc_cv_type_clock_t=no])])
1682 if test $gcc_cv_type_clock_t = yes; then
1683   AC_DEFINE(HAVE_CLOCK_T, 1,
1684   [Define if <time.h> defines clock_t.])
1685 fi
1686
1687 # Check if F_SETLKW is supported by fcntl.
1688 AC_CACHE_CHECK(for F_SETLKW, ac_cv_f_setlkw, [
1689 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1690 #include <fcntl.h>]], [[
1691 struct flock fl;
1692 fl.l_whence = 0;
1693 fl.l_start = 0;
1694 fl.l_len = 0;
1695 fl.l_pid = 0;
1696 return fcntl (1, F_SETLKW, &fl);]])],
1697 [ac_cv_f_setlkw=yes],[ac_cv_f_setlkw=no])])
1698 if test $ac_cv_f_setlkw = yes; then
1699   AC_DEFINE(HOST_HAS_F_SETLKW, 1,
1700   [Define if F_SETLKW supported by fcntl.])
1701 fi
1702
1703 # Check if O_CLOEXEC is defined by fcntl
1704 AC_CACHE_CHECK(for O_CLOEXEC, ac_cv_o_cloexec, [
1705 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1706 #include <fcntl.h>]], [[
1707 return open ("/dev/null", O_RDONLY | O_CLOEXEC);]])],
1708 [ac_cv_o_cloexec=yes],[ac_cv_o_cloexec=no])])
1709 if test $ac_cv_o_cloexec = yes; then
1710   AC_DEFINE(HOST_HAS_O_CLOEXEC, 1,
1711   [Define if O_CLOEXEC supported by fcntl.])
1712 fi
1713
1714 # Check if O_NONBLOCK is defined by fcntl
1715 AC_CHECK_HEADERS([fcntl.h])
1716 AC_CHECK_DECL(O_NONBLOCK,,,[#include <fcntl.h>])
1717 if test $ac_cv_have_decl_O_NONBLOCK = yes; then
1718   AC_DEFINE(HOST_HAS_O_NONBLOCK, 1,
1719   [Define if O_NONBLOCK supported by fcntl.])
1720 fi
1721
1722
1723 # C++ Modules would like some networking features to provide the mapping
1724 # server.  You can still use modules without them though.
1725 # The following network-related checks could probably do with some
1726 # Windows and other non-linux defenses and checking.
1727
1728 # Local socket connectivity wants AF_UNIX networking
1729 # Check for AF_UNIX networking
1730 AC_CACHE_CHECK(for AF_UNIX, ac_cv_af_unix, [
1731 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1732 #include <sys/types.h>
1733 #include <sys/socket.h>
1734 #include <sys/un.h>
1735 #include <netinet/in.h>]],[[
1736 sockaddr_un un;
1737 un.sun_family = AF_UNSPEC;
1738 int fd = socket (AF_UNIX, SOCK_STREAM, 0);
1739 connect (fd, (sockaddr *)&un, sizeof (un));]])],
1740 [ac_cv_af_unix=yes],
1741 [ac_cv_af_unix=no])])
1742 if test $ac_cv_af_unix = yes; then
1743   AC_DEFINE(HAVE_AF_UNIX, 1,
1744   [Define if AF_UNIX supported.])
1745 fi
1746
1747 # Remote socket connectivity wants AF_INET6 networking
1748 # Check for AF_INET6 networking
1749 AC_CACHE_CHECK(for AF_INET6, ac_cv_af_inet6, [
1750 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1751 #include <sys/types.h>
1752 #include <sys/socket.h>
1753 #include <netinet/in.h>
1754 #include <netdb.h>]],[[
1755 sockaddr_in6 in6;
1756 in6.sin6_family = AF_UNSPEC;
1757 struct addrinfo *addrs = 0;
1758 struct addrinfo hints;
1759 hints.ai_flags = 0;
1760 hints.ai_family = AF_INET6;
1761 hints.ai_socktype = SOCK_STREAM;
1762 hints.ai_protocol = 0;
1763 hints.ai_canonname = 0;
1764 hints.ai_addr = 0;
1765 hints.ai_next = 0;
1766 int e = getaddrinfo ("localhost", 0, &hints, &addrs);
1767 const char *str = gai_strerror (e);
1768 freeaddrinfo (addrs);
1769 int fd = socket (AF_INET6, SOCK_STREAM, 0);
1770 connect (fd, (sockaddr *)&in6, sizeof (in6));]])],
1771 [ac_cv_af_inet6=yes],
1772 [ac_cv_af_inet6=no])])
1773 if test $ac_cv_af_inet6 = yes; then
1774   AC_DEFINE(HAVE_AF_INET6, 1,
1775   [Define if AF_INET6 supported.])
1776 fi
1777
1778 # Check if _LK_LOCK is supported by _locking
1779 AC_CACHE_CHECK(for _LK_LOCK, ac_cv_lk_lock, [
1780 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1781 #include <io.h>
1782 #include <sys/locking.h>]], [[
1783   int fd;
1784   return _locking (fd, _LK_LOCK, 0);]])],
1785 [ac_cv_lk_lock=yes],[ac_cv_lk_lock=no])])
1786 if test $ac_cv_lk_lock = yes; then
1787   AC_DEFINE(HOST_HAS_LK_LOCK, 1,
1788   [Define if _LK_LOC supported by _locking.])
1789 fi
1790
1791 # Restore CFLAGS, CXXFLAGS from before the gcc_AC_NEED_DECLARATIONS tests.
1792 CFLAGS="$saved_CFLAGS"
1793 CXXFLAGS="$saved_CXXFLAGS"
1794
1795 # mkdir takes a single argument on some systems.
1796 gcc_AC_FUNC_MKDIR_TAKES_ONE_ARG
1797
1798 # File extensions
1799 manext='.1'
1800 objext='.o'
1801 AC_SUBST(manext)
1802 AC_SUBST(objext)
1803
1804 # With Setjmp/Longjmp based exception handling.
1805 AC_ARG_ENABLE(sjlj-exceptions,
1806 [AS_HELP_STRING([--enable-sjlj-exceptions],
1807                 [arrange to use setjmp/longjmp exception handling])],
1808 [force_sjlj_exceptions=yes],
1809 [case $target in
1810   lm32*-*-*)
1811      force_sjlj_exceptions=yes
1812      enableval=yes
1813      ;;
1814   *)
1815     force_sjlj_exceptions=no
1816     ;;
1817 esac])
1818 if test $force_sjlj_exceptions = yes; then
1819   sjlj=`if test $enableval = yes; then echo 1; else echo 0; fi`
1820   AC_DEFINE_UNQUOTED(CONFIG_SJLJ_EXCEPTIONS, $sjlj,
1821     [Define 0/1 to force the choice for exception handling model.])
1822 fi
1823
1824 # --------------------------------------------------------
1825 # Build, host, and target specific configuration fragments
1826 # --------------------------------------------------------
1827
1828 # Collect build-machine-specific information.
1829 . ${srcdir}/config.build || exit 1
1830
1831 # Collect host-machine-specific information.
1832 . ${srcdir}/config.host || exit 1
1833
1834 target_gtfiles=
1835
1836 # Collect target-machine-specific information.
1837 . ${srcdir}/config.gcc || exit 1
1838
1839 extra_objs="${host_extra_objs} ${extra_objs}"
1840 extra_gcc_objs="${host_extra_gcc_objs} ${extra_gcc_objs}"
1841
1842 # Default the target-machine variables that were not explicitly set.
1843 if test x"$tm_file" = x
1844 then tm_file=$cpu_type/$cpu_type.h; fi
1845
1846 if test x"$extra_headers" = x
1847 then extra_headers=; fi
1848
1849 if test x$md_file = x
1850 then md_file=$cpu_type/$cpu_type.md; fi
1851
1852 if test x$out_file = x
1853 then out_file=$cpu_type/$cpu_type.cc; fi
1854
1855 if test x"$tmake_file" = x
1856 then tmake_file=$cpu_type/t-$cpu_type
1857 fi
1858
1859 # Support --enable-initfini-array.
1860 if test x$enable_initfini_array != xno; then
1861   tm_file="${tm_file} initfini-array.h"
1862 fi
1863
1864 if test x"$dwarf2" = xyes
1865 then tm_file="$tm_file tm-dwarf2.h"
1866 fi
1867
1868 # Say what files are being used for the output code and MD file.
1869 echo "Using \`$srcdir/config/$out_file' for machine-specific logic."
1870 echo "Using \`$srcdir/config/$md_file' as machine description file."
1871
1872 # If any of the xm_file variables contain nonexistent files, warn
1873 # about them and drop them.
1874
1875 bx=
1876 for x in $build_xm_file; do
1877   if    test -f $srcdir/config/$x
1878   then      bx="$bx $x"
1879   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1880   fi
1881 done
1882 build_xm_file="$bx"
1883
1884 hx=
1885 for x in $host_xm_file; do
1886   if    test -f $srcdir/config/$x
1887   then      hx="$hx $x"
1888   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1889   fi
1890 done
1891 host_xm_file="$hx"
1892
1893 tx=
1894 for x in $xm_file; do
1895   if    test -f $srcdir/config/$x
1896   then      tx="$tx $x"
1897   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1898   fi
1899 done
1900 xm_file="$tx"
1901
1902 count=a
1903 for f in $tm_file; do
1904         count=${count}x
1905 done
1906 if test $count = ax; then
1907         echo "Using \`$srcdir/config/$tm_file' as target machine macro file."
1908 else
1909         echo "Using the following target machine macro files:"
1910         for f in $tm_file; do
1911                 echo "  $srcdir/config/$f"
1912         done
1913 fi
1914
1915 if test x$use_long_long_for_widest_fast_int = xyes; then
1916         AC_DEFINE(USE_LONG_LONG_FOR_WIDEST_FAST_INT, 1,
1917 [Define to 1 if the 'long long' type is wider than 'long' but still
1918 efficiently supported by the host hardware.])
1919 fi
1920
1921 gnu_ld_bool=`if test x"$gnu_ld" = x"yes"; then echo 1; else echo 0; fi`
1922 AC_DEFINE_UNQUOTED(HAVE_GNU_LD, $gnu_ld_bool, [Define to 1 if using GNU ld.])
1923
1924 gnu_as_bool=`if test x"$gas" = x"yes"; then echo 1; else echo 0; fi`
1925 AC_DEFINE_UNQUOTED(HAVE_GNU_AS, $gnu_as_bool, [Define to 1 if using GNU as.])
1926
1927 count=a
1928 for f in $host_xm_file; do
1929         count=${count}x
1930 done
1931 if test $count = a; then
1932         :
1933 elif test $count = ax; then
1934         echo "Using \`$srcdir/config/$host_xm_file' as host machine macro file."
1935 else
1936         echo "Using the following host machine macro files:"
1937         for f in $host_xm_file; do
1938                 echo "  $srcdir/config/$f"
1939         done
1940 fi
1941 echo "Using ${out_host_hook_obj} for host machine hooks."
1942
1943 if test "$host_xm_file" != "$build_xm_file"; then
1944         count=a
1945         for f in $build_xm_file; do
1946                 count=${count}x
1947         done
1948         if test $count = a; then
1949                 :
1950         elif test $count = ax; then
1951                 echo "Using \`$srcdir/config/$build_xm_file' as build machine macro file."
1952         else
1953                 echo "Using the following build machine macro files:"
1954                 for f in $build_xm_file; do
1955                         echo "  $srcdir/config/$f"
1956                 done
1957         fi
1958 fi
1959
1960 if test -n "$configured_native_system_header_dir"; then
1961   native_system_header_dir=$configured_native_system_header_dir
1962 fi
1963 NATIVE_SYSTEM_HEADER_DIR="$native_system_header_dir"
1964 AC_SUBST(NATIVE_SYSTEM_HEADER_DIR)
1965
1966 case ${host} in
1967   powerpc*-*-darwin*)
1968     AC_CACHE_CHECK([whether mcontext_t fields have underscores],
1969       gcc_cv_mcontext_underscores,
1970       AC_COMPILE_IFELSE([AC_LANG_SOURCE([
1971 #include <sys/cdefs.h>
1972 #include <sys/signal.h>
1973 #include <ucontext.h>
1974 int main() { mcontext_t m; if (m->ss.srr0) return 0; return 0; }
1975 ])],
1976         gcc_cv_mcontext_underscores=no, gcc_cv_mcontext_underscores=yes))
1977       if test $gcc_cv_mcontext_underscores = yes; then
1978         AC_DEFINE(HAS_MCONTEXT_T_UNDERSCORES,,dnl
1979           [mcontext_t fields start with __])
1980       fi
1981     ;;
1982 esac
1983
1984 # ---------
1985 # Threading
1986 # ---------
1987
1988 # Check if a valid thread package
1989 case ${enable_threads} in
1990   "" | no)
1991     # No threads
1992     target_thread_file='single'
1993     ;;
1994   yes)
1995     # default
1996     target_thread_file='single'
1997     ;;
1998   aix | dce | lynx | mipssde | posix | rtems | \
1999   single | tpf | vxworks | win32 | mcf)
2000     target_thread_file=${enable_threads}
2001     ;;
2002   *)
2003     echo "${enable_threads} is an unknown thread package" 1>&2
2004     exit 1
2005     ;;
2006 esac
2007
2008 if test x${thread_file} = x; then
2009   # No thread file set by target-specific clauses in config.gcc,
2010   # so use file chosen by default logic above
2011   thread_file=${target_thread_file}
2012 fi
2013
2014 # --------
2015 # UNSORTED
2016 # --------
2017
2018 use_cxa_atexit=no
2019 if test x$enable___cxa_atexit = xyes || \
2020    test x$enable___cxa_atexit = x -a x$default_use_cxa_atexit = xyes; then
2021   if test x$host = x$target; then
2022     case $host in
2023       # mingw32 doesn't have __cxa_atexit but uses atexit registration
2024       # keyed to flag_use_cxa_atexit
2025       *-*-mingw32*)
2026         use_cxa_atexit=yes
2027         ;;
2028       powerpc-ibm-aix*)
2029         use_cxa_atexit=yes
2030         ;;
2031       *)
2032         AC_CHECK_FUNC(__cxa_atexit,[use_cxa_atexit=yes],
2033           [echo "__cxa_atexit can't be enabled on this target"])
2034         ;;
2035     esac
2036   else
2037     # We can't check for __cxa_atexit when building a cross, so assume
2038     # it is available
2039     use_cxa_atexit=yes
2040   fi
2041   if test x$use_cxa_atexit = xyes; then
2042     AC_DEFINE(DEFAULT_USE_CXA_ATEXIT, 2,
2043       [Define if you want to use __cxa_atexit, rather than atexit, to
2044       register C++ destructors for local statics and global objects.
2045       This is essential for fully standards-compliant handling of
2046       destructors, but requires __cxa_atexit in libc.])
2047   fi
2048 fi
2049
2050 # Look for a file containing extra machine modes.
2051 if test -n "$extra_modes" && test -f $srcdir/config/$extra_modes; then
2052   extra_modes_file='$(srcdir)'/config/${extra_modes}
2053   AC_SUBST(extra_modes_file)
2054   AC_DEFINE_UNQUOTED(EXTRA_MODES_FILE, "config/$extra_modes",
2055   [Define to the name of a file containing a list of extra machine modes
2056    for this architecture.])
2057 fi
2058
2059 # Convert extra_options into a form suitable for Makefile use.
2060 extra_opt_files=
2061 all_opt_files=
2062 for f in $extra_options; do
2063   extra_opt_files="$extra_opt_files \$(srcdir)/config/$f"
2064   all_opt_files="$all_opt_files $srcdir/config/$f"
2065 done
2066 AC_SUBST(extra_opt_files)
2067
2068 # auto-host.h is the file containing items generated by autoconf and is
2069 # the first file included by config.h.
2070 # If host=build, it is correct to have bconfig include auto-host.h
2071 # as well.  If host!=build, we are in error and need to do more
2072 # work to find out the build config parameters.
2073 if test x$host = x$build
2074 then
2075         build_auto=auto-host.h
2076         HAVE_AUTO_BUILD='# '
2077 else
2078         # We create a subdir, then run autoconf in the subdir.
2079         # To prevent recursion we set host and build for the new
2080         # invocation of configure to the build for this invocation
2081         # of configure.
2082         tempdir=build.$$
2083         rm -rf $tempdir
2084         mkdir $tempdir
2085         cd $tempdir
2086         case ${srcdir} in
2087         /* | [A-Za-z]:[\\/]* ) realsrcdir=${srcdir};;
2088         *) realsrcdir=../${srcdir};;
2089         esac
2090         # Clearing GMPINC is necessary to prevent host headers being
2091         # used by the build compiler.  Defining GENERATOR_FILE stops
2092         # system.h from including gmp.h.
2093         CC="${CC_FOR_BUILD}" CFLAGS="${CFLAGS_FOR_BUILD}" \
2094         CXX="${CXX_FOR_BUILD}" CXXFLAGS="${CXXFLAGS_FOR_BUILD}" \
2095         LD="${LD_FOR_BUILD}" LDFLAGS="${LDFLAGS_FOR_BUILD}" \
2096         GMPINC="" CPPFLAGS="${CPPFLAGS_FOR_BUILD} -DGENERATOR_FILE" \
2097         ${realsrcdir}/configure \
2098                 --enable-languages=${enable_languages-all} \
2099                 ${enable_obsolete+--enable-obsolete="$enable_obsolete"} \
2100                 ${enable_option_checking+--enable-option-checking="$enable_option_checking"} \
2101                 --target=$target_alias --host=$build_alias \
2102                 --build=$build_alias || exit # retaining $tempdir
2103
2104         # We just finished tests for the build machine, so rename
2105         # the file auto-build.h in the gcc directory.
2106         mv auto-host.h ../auto-build.h
2107         cd ..
2108         rm -rf $tempdir
2109         build_auto=auto-build.h
2110         HAVE_AUTO_BUILD=
2111 fi
2112 AC_SUBST(build_subdir)
2113 AC_SUBST(HAVE_AUTO_BUILD)
2114
2115 tm_file="${tm_file} defaults.h"
2116 tm_p_file="${tm_p_file} tm-preds.h"
2117 host_xm_file="auto-host.h ansidecl.h ${host_xm_file}"
2118 build_xm_file="${build_auto} ansidecl.h ${build_xm_file}"
2119 # We don't want ansidecl.h in target files, write code there in ISO/GNU C.
2120 # put this back in temporarily.
2121 xm_file="auto-host.h ansidecl.h ${xm_file}"
2122
2123 # --------
2124 # UNSORTED
2125 # --------
2126
2127 changequote(,)dnl
2128 # Compile in configure arguments.
2129 if test -f configargs.h ; then
2130         # Being re-configured.
2131         gcc_config_arguments=`grep configuration_arguments configargs.h | sed -e 's/.*"\([^"]*\)".*/\1/'`
2132         gcc_reconf_arguments=`echo "$gcc_config_arguments" | sed -e 's/^.*\( : (reconfigured) .*$\)/\1/'`
2133         if [ "$gcc_reconf_arguments" != " : (reconfigured) $TOPLEVEL_CONFIGURE_ARGUMENTS" ]; then
2134                 gcc_config_arguments="$gcc_config_arguments : (reconfigured) $TOPLEVEL_CONFIGURE_ARGUMENTS"
2135         fi
2136 else
2137         gcc_config_arguments="$TOPLEVEL_CONFIGURE_ARGUMENTS"
2138 fi
2139
2140 # Double all backslashes and backslash all quotes to turn
2141 # gcc_config_arguments into a C string.
2142 sed -e 's/\\/\\\\/g; s/"/\\"/g' <<EOF >conftest.out
2143 $gcc_config_arguments
2144 EOF
2145 gcc_config_arguments_str=`cat conftest.out`
2146 rm -f conftest.out
2147
2148 cat > configargs.h <<EOF
2149 /* Generated automatically. */
2150 static const char configuration_arguments[] = "$gcc_config_arguments_str";
2151 static const char thread_model[] = "$thread_file";
2152
2153 static const struct {
2154   const char *name, *value;
2155 } configure_default_options[] = $configure_default_options;
2156 EOF
2157 changequote([,])dnl
2158
2159 changequote(,)dnl
2160 gcc_BASEVER=`cat $srcdir/BASE-VER`
2161 gcc_DEVPHASE=`cat $srcdir/DEV-PHASE`
2162 gcc_DATESTAMP=`cat $srcdir/DATESTAMP`
2163 if test -f $srcdir/REVISION ; then
2164         gcc_REVISION=`cat $srcdir/REVISION`
2165 else
2166         gcc_REVISION=""
2167 fi
2168 cat > plugin-version.h <<EOF
2169 #include "configargs.h"
2170
2171 #define GCCPLUGIN_VERSION_MAJOR   `echo $gcc_BASEVER | sed -e 's/^\([0-9]*\).*$/\1/'`
2172 #define GCCPLUGIN_VERSION_MINOR   `echo $gcc_BASEVER | sed -e 's/^[0-9]*\.\([0-9]*\).*$/\1/'`
2173 #define GCCPLUGIN_VERSION_PATCHLEVEL   `echo $gcc_BASEVER | sed -e 's/^[0-9]*\.[0-9]*\.\([0-9]*\)$/\1/'`
2174 #define GCCPLUGIN_VERSION  (GCCPLUGIN_VERSION_MAJOR*1000 + GCCPLUGIN_VERSION_MINOR)
2175
2176 static char basever[] = "$gcc_BASEVER";
2177 static char datestamp[] = "$gcc_DATESTAMP";
2178 static char devphase[] = "$gcc_DEVPHASE";
2179 static char revision[] = "$gcc_REVISION";
2180
2181 /* FIXME plugins: We should make the version information more precise.
2182    One way to do is to add a checksum. */
2183
2184 static struct plugin_gcc_version gcc_version = {basever, datestamp,
2185                                                 devphase, revision,
2186                                                 configuration_arguments};
2187 EOF
2188 changequote([,])dnl
2189
2190 # Determine what GCC version number to use in filesystem paths.
2191 GCC_BASE_VER
2192
2193 # Internationalization
2194 ZW_GNU_GETTEXT_SISTER_DIR
2195
2196 # If LIBINTL contains LIBICONV, then clear LIBICONV so we don't get
2197 # -liconv on the link line twice.
2198 case "$LIBINTL" in *$LIBICONV*)
2199         LIBICONV= ;;
2200 esac
2201
2202 AC_ARG_ENABLE(secureplt,
2203 [AS_HELP_STRING([--enable-secureplt],
2204                 [enable -msecure-plt by default for PowerPC])],
2205 [], [])
2206
2207 AC_ARG_ENABLE(mingw-wildcard,
2208 [AS_HELP_STRING([--enable-mingw-wildcard],
2209                 [Set whether to expand wildcard on command-line.
2210                  Default to platform configuration])],
2211 [],[enable_mingw_wildcard=platform])
2212 AS_IF([test x"$enable_mingw_wildcard" != xplatform ],
2213       [AC_DEFINE_UNQUOTED(MINGW_DOWILDCARD,
2214                  $(test x"$enable_mingw_wildcard" = xno; echo $?),
2215                  [Value to set mingw's _dowildcard to.])])
2216
2217 AC_ARG_ENABLE(large-address-aware,
2218 [AS_HELP_STRING([--enable-large-address-aware],
2219                 [Link mingw executables with --large-address-aware])])
2220 AS_IF([test x"$enable_large_address_aware" = xyes],
2221   [AC_DEFINE([MINGW_DEFAULT_LARGE_ADDR_AWARE], 1,
2222     [Define if we should link mingw executables with --large-address-aware])])
2223
2224 AC_ARG_ENABLE(leading-mingw64-underscores,
2225   AS_HELP_STRING([--enable-leading-mingw64-underscores],
2226                  [enable leading underscores on 64 bit mingw targets]),
2227   [],[])
2228 AS_IF([ test x"$enable_leading_mingw64_underscores" = xyes ],
2229   [AC_DEFINE(USE_MINGW64_LEADING_UNDERSCORES, 1,
2230     [Define if we should use leading underscore on 64 bit mingw targets])])
2231
2232 AC_ARG_ENABLE(cld,
2233 [AS_HELP_STRING([--enable-cld], [enable -mcld by default for 32bit x86])], [],
2234 [enable_cld=no])
2235
2236 AC_ARG_ENABLE(frame-pointer,
2237 [AS_HELP_STRING([--enable-frame-pointer],
2238                 [enable -fno-omit-frame-pointer by default for x86])], [],
2239 [
2240 case $target_os in
2241 linux* | gnu* | darwin[[8912]]* | cygwin* | mingw*)
2242   # Enable -fomit-frame-pointer by default for these systems with DWARF2.
2243   enable_frame_pointer=no
2244   ;;
2245 *)
2246   enable_frame_pointer=yes
2247   ;;
2248 esac
2249 ])
2250
2251 case $target in
2252 i[[34567]]86-*-* | x86_64-*-*)
2253         if test "x$enable_cld" = xyes; then
2254                 tm_defines="${tm_defines} USE_IX86_CLD=1"
2255         fi
2256         if test "x$enable_frame_pointer" = xyes; then
2257                 tm_defines="${tm_defines} USE_IX86_FRAME_POINTER=1"
2258         fi
2259         ;;
2260 esac
2261
2262 # Windows32 Registry support for specifying GCC installation paths.
2263 AC_ARG_ENABLE(win32-registry,
2264 [AS_HELP_STRING([--disable-win32-registry],
2265                 [disable lookup of installation paths in the
2266                  Registry on Windows hosts])
2267 AS_HELP_STRING([--enable-win32-registry], [enable registry lookup (default)])
2268 AS_HELP_STRING([--enable-win32-registry=KEY],
2269                [use KEY instead of GCC version as the last portion
2270                 of the registry key])],,)
2271
2272 case $host_os in
2273   win32 | pe | cygwin* | mingw32*)
2274     if test "x$enable_win32_registry" != xno; then
2275       AC_SEARCH_LIBS(RegOpenKeyExA, advapi32,, [enable_win32_registry=no])
2276     fi
2277
2278     if test "x$enable_win32_registry" != xno; then
2279       AC_DEFINE(ENABLE_WIN32_REGISTRY, 1,
2280   [Define to 1 if installation paths should be looked up in the Windows
2281    Registry. Ignored on non-Windows hosts.])
2282
2283       if test "x$enable_win32_registry" != xyes \
2284          && test "x$enable_win32_registry" != x; then
2285         AC_DEFINE_UNQUOTED(WIN32_REGISTRY_KEY, "$enable_win32_registry",
2286   [Define to be the last component of the Windows registry key under which
2287    to look for installation paths.  The full key used will be
2288    HKEY_LOCAL_MACHINE/SOFTWARE/Free Software Foundation/{WIN32_REGISTRY_KEY}.
2289    The default is the GCC version number.])
2290       fi
2291     fi
2292   ;;
2293 esac
2294
2295 # Get an absolute path to the GCC top-level source directory
2296 holddir=`${PWDCMD-pwd}`
2297 cd $srcdir
2298 topdir=`${PWDCMD-pwd}`
2299 cd $holddir
2300
2301 # Conditionalize the makefile for this host machine.
2302 xmake_file=
2303 for f in ${host_xmake_file}
2304 do
2305         if test -f ${srcdir}/config/$f
2306         then
2307                 xmake_file="${xmake_file} \$(srcdir)/config/$f"
2308         fi
2309 done
2310
2311 # Conditionalize the makefile for this target machine.
2312 tmake_file_=
2313 for f in ${tmake_file}
2314 do
2315         if test -f ${srcdir}/config/$f
2316         then
2317                 tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
2318         fi
2319 done
2320 tmake_file="${tmake_file_}${omp_device_property_tmake_file}"
2321
2322 out_object_file=`basename $out_file .cc`.o
2323 common_out_object_file=`basename $common_out_file .cc`.o
2324
2325 tm_file_list="options.h"
2326 tm_include_list="options.h insn-constants.h"
2327 for f in $tm_file; do
2328   case $f in
2329     ./* )
2330        f=`echo $f | sed 's/^..//'`
2331        tm_file_list="${tm_file_list} $f"
2332        tm_include_list="${tm_include_list} $f"
2333        ;;
2334     defaults.h )
2335        tm_file_list="${tm_file_list} \$(srcdir)/$f"
2336        tm_include_list="${tm_include_list} $f"
2337        ;;
2338     * )
2339        tm_file_list="${tm_file_list} \$(srcdir)/config/$f"
2340        tm_include_list="${tm_include_list} config/$f"
2341        ;;
2342   esac
2343 done
2344
2345 tm_p_file_list=
2346 tm_p_include_list=
2347 for f in $tm_p_file; do
2348   case $f in
2349     tm-preds.h )
2350        tm_p_file_list="${tm_p_file_list} $f"
2351        tm_p_include_list="${tm_p_include_list} $f"
2352        ;;
2353     * )
2354        tm_p_file_list="${tm_p_file_list} \$(srcdir)/config/$f"
2355        tm_p_include_list="${tm_p_include_list} config/$f"
2356   esac
2357 done
2358
2359 tm_d_file_list=
2360 tm_d_include_list=
2361 for f in $tm_d_file; do
2362   case $f in
2363     * )
2364        tm_d_file_list="${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         gcc_GAS_CHECK_FEATURE([AIX DWARF location lists section support],
5076           gcc_cv_as_aix_dwloc,,
5077           [     .dwsect 0xA0000
5078         Lframe..0:
5079                 .vbyte 4,Lframe..0
5080           ],,
5081           [AC_DEFINE(HAVE_XCOFF_DWARF_EXTRAS, 1,
5082             [Define if your assembler supports AIX debug frame section label reference.])])
5083         ;;
5084     esac
5085     ;;
5086
5087   mips*-*-*)
5088     gcc_GAS_CHECK_FEATURE([explicit relocation support],
5089       gcc_cv_as_mips_explicit_relocs,,
5090 [       lw $4,%gp_rel(foo)($4)],,
5091       [if test x$target_cpu_default = x
5092        then target_cpu_default=MASK_EXPLICIT_RELOCS
5093        else target_cpu_default="($target_cpu_default)|MASK_EXPLICIT_RELOCS"
5094        fi])
5095
5096     gcc_GAS_CHECK_FEATURE([-mno-shared support],
5097       gcc_cv_as_mips_no_shared,[-mno-shared], [nop],,
5098       [AC_DEFINE(HAVE_AS_NO_SHARED, 1,
5099                  [Define if the assembler understands -mno-shared.])])
5100
5101     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
5102       gcc_cv_as_mips_gnu_attribute,,
5103       [.gnu_attribute 4,1],,
5104       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
5105           [Define if your assembler supports .gnu_attribute.])])
5106
5107     gcc_GAS_CHECK_FEATURE([.module support],
5108       gcc_cv_as_mips_dot_module,[-32],
5109       [.module mips2
5110        .module fp=xx],,
5111       [AC_DEFINE(HAVE_AS_DOT_MODULE, 1,
5112           [Define if your assembler supports .module.])])
5113     if test x$gcc_cv_as_mips_dot_module = xno \
5114        && test x$with_fp_32 != x; then
5115       AC_MSG_ERROR(
5116         [Requesting --with-fp-32= requires assembler support for .module.])
5117     fi
5118
5119     gcc_GAS_CHECK_FEATURE([.micromips support],
5120       gcc_cv_as_micromips_support,[--fatal-warnings],
5121       [.set micromips],,
5122       [AC_DEFINE(HAVE_GAS_MICROMIPS, 1,
5123           [Define if your assembler supports the .set micromips directive])])
5124
5125     gcc_GAS_CHECK_FEATURE([.dtprelword support],
5126       gcc_cv_as_mips_dtprelword,,
5127       [.section .tdata,"awT",@progbits
5128 x:
5129         .word 2
5130         .text
5131         .dtprelword x+0x8000],,
5132       [AC_DEFINE(HAVE_AS_DTPRELWORD, 1,
5133           [Define if your assembler supports .dtprelword.])])
5134
5135     gcc_GAS_CHECK_FEATURE([DSPR1 mult with four accumulators support],
5136       gcc_cv_as_mips_dspr1_mult,,
5137 [       .set    mips32r2
5138         .set    nodspr2
5139         .set    dsp
5140         madd    $ac3,$4,$5
5141         maddu   $ac3,$4,$5
5142         msub    $ac3,$4,$5
5143         msubu   $ac3,$4,$5
5144         mult    $ac3,$4,$5
5145         multu   $ac3,$4,$5],,
5146       [AC_DEFINE(HAVE_AS_DSPR1_MULT, 1,
5147           [Define if your assembler supports DSPR1 mult.])])
5148
5149     AC_MSG_CHECKING(assembler and linker for explicit JALR relocation)
5150     gcc_cv_as_ld_jalr_reloc=no
5151     if test $gcc_cv_as_mips_explicit_relocs = yes; then
5152       if test $in_tree_ld = yes ; then
5153         if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 20 -o "$gcc_cv_gld_major_version" -gt 2 \
5154            && test $in_tree_ld_is_elf = yes; then
5155           gcc_cv_as_ld_jalr_reloc=yes
5156         fi
5157       elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x; then
5158         echo '  .ent x' > conftest.s
5159         echo 'x:        lw $2,%got_disp(y)($3)' >> conftest.s
5160         echo '  lw $25,%call16(y)($28)' >> conftest.s
5161         echo '  .reloc  1f,R_MIPS_JALR,y' >> conftest.s
5162         echo '1:        jalr $25' >> conftest.s
5163         echo '  .reloc  1f,R_MIPS_JALR,x' >> conftest.s
5164         echo '1:        jalr $25' >> conftest.s
5165         echo '  .end x' >> conftest.s
5166         if $gcc_cv_as -o conftest.o conftest.s >/dev/null 2>&AS_MESSAGE_LOG_FD \
5167            && $gcc_cv_ld -shared -o conftest.so conftest.o >/dev/null 2>&AS_MESSAGE_LOG_FD; then
5168           if $gcc_cv_objdump -d conftest.so | grep jalr >/dev/null 2>&1 \
5169              && $gcc_cv_objdump -d conftest.so | grep "bal.*<x>" >/dev/null 2>&1; then
5170             gcc_cv_as_ld_jalr_reloc=yes
5171           fi
5172         fi
5173         rm -f conftest.*
5174       fi
5175     fi
5176     if test $gcc_cv_as_ld_jalr_reloc = yes; then
5177       if test x$target_cpu_default = x; then
5178         target_cpu_default=MASK_RELAX_PIC_CALLS
5179       else
5180         target_cpu_default="($target_cpu_default)|MASK_RELAX_PIC_CALLS"
5181       fi
5182     fi
5183     AC_MSG_RESULT($gcc_cv_as_ld_jalr_reloc)
5184
5185     AC_CACHE_CHECK([linker for .eh_frame personality relaxation],
5186       [gcc_cv_ld_mips_personality_relaxation],
5187       [gcc_cv_ld_mips_personality_relaxation=no
5188        if test $in_tree_ld = yes ; then
5189          if test "$gcc_cv_gld_major_version" -eq 2 \
5190                  -a "$gcc_cv_gld_minor_version" -ge 21 \
5191                  -o "$gcc_cv_gld_major_version" -gt 2; then
5192            gcc_cv_ld_mips_personality_relaxation=yes
5193          fi
5194        elif test x$gcc_cv_as != x \
5195                  -a x$gcc_cv_ld != x \
5196                  -a x$gcc_cv_readelf != x ; then
5197          cat > conftest.s <<EOF
5198         .cfi_startproc
5199         .cfi_personality 0x80,indirect_ptr
5200         .ent test
5201 test:
5202         nop
5203         .end test
5204         .cfi_endproc
5205
5206         .section .data,"aw",@progbits
5207 indirect_ptr:
5208         .dc.a personality
5209 EOF
5210          if $gcc_cv_as -KPIC -o conftest.o conftest.s > /dev/null 2>&1 \
5211             && $gcc_cv_ld -o conftest conftest.o -shared > /dev/null 2>&1; then
5212            if $gcc_cv_readelf -d conftest 2>&1 \
5213               | grep TEXTREL > /dev/null 2>&1; then
5214              :
5215            elif $gcc_cv_readelf --relocs conftest 2>&1 \
5216                 | grep 'R_MIPS_REL32 *$' > /dev/null 2>&1; then
5217              :
5218            else
5219              gcc_cv_ld_mips_personality_relaxation=yes
5220            fi
5221          fi
5222        fi
5223        rm -f conftest.s conftest.o conftest])
5224     if test x$gcc_cv_ld_mips_personality_relaxation = xyes; then
5225             AC_DEFINE(HAVE_LD_PERSONALITY_RELAXATION, 1,
5226       [Define if your linker can relax absolute .eh_frame personality
5227 pointers into PC-relative form.])
5228     fi
5229
5230     gcc_GAS_CHECK_FEATURE([-mnan= support],
5231       gcc_cv_as_mips_nan,
5232       [-mnan=2008],,,
5233       [AC_DEFINE(HAVE_AS_NAN, 1,
5234                  [Define if the assembler understands -mnan=.])])
5235     if test x$gcc_cv_as_mips_nan = xno \
5236        && test x$with_nan != x; then
5237       AC_MSG_ERROR(
5238         [Requesting --with-nan= requires assembler support for -mnan=])
5239     fi
5240     ;;
5241     msp430-*-*)
5242     # Earlier GAS versions generically support .gnu_attribute, but the
5243     # msp430 assembler will not do anything with it.
5244     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
5245       gcc_cv_as_msp430_gnu_attribute,,
5246       [.gnu_attribute 4,1],,
5247       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
5248           [Define if your assembler supports .gnu_attribute.])])
5249     gcc_GAS_CHECK_FEATURE([.mspabi_attribute support],
5250       gcc_cv_as_msp430_mspabi_attribute,,
5251       [.mspabi_attribute 4,2],,
5252       [AC_DEFINE(HAVE_AS_MSPABI_ATTRIBUTE, 1,
5253           [Define if your assembler supports .mspabi_attribute.])])
5254     if test x$enable_newlib_nano_formatted_io = xyes; then
5255       AC_DEFINE(HAVE_NEWLIB_NANO_FORMATTED_IO, 1, [Define if GCC has been
5256 configured with --enable-newlib-nano-formatted-io.])
5257       fi
5258     ;;
5259     nios2-*-*)
5260     # Versions 2.33 and earlier lacked support for the %gotoff relocation
5261     # syntax that is documented in the ABI specification.
5262     gcc_GAS_CHECK_FEATURE([support for %gotoff relocations in constant data],
5263       gcc_cv_as_nios2_gotoff_relocation,,
5264 [       .extern foo
5265         .data
5266         .long %gotoff(foo)],,
5267       [AC_DEFINE(HAVE_AS_NIOS2_GOTOFF_RELOCATION, 1,
5268           [Define if your assembler supports %gotoff relocation syntax.])])
5269     ;;
5270     riscv*-*-*)
5271     gcc_GAS_CHECK_FEATURE([.attribute support],
5272       gcc_cv_as_riscv_attribute,,
5273       [.attribute stack_align,4],,
5274       [AC_DEFINE(HAVE_AS_RISCV_ATTRIBUTE, 1,
5275           [Define if your assembler supports .attribute.])])
5276     gcc_GAS_CHECK_FEATURE([-misa-spec= support],
5277       gcc_cv_as_riscv_isa_spec,
5278       [-misa-spec=2.2],,,
5279       [AC_DEFINE(HAVE_AS_MISA_SPEC, 1,
5280                  [Define if the assembler understands -misa-spec=.])])
5281     gcc_GAS_CHECK_FEATURE([-march=rv32i_zifencei support],
5282       gcc_cv_as_riscv_march_zifencei,
5283       [-march=rv32i_zifencei2p0],,,
5284       [AC_DEFINE(HAVE_AS_MARCH_ZIFENCEI, 1,
5285                  [Define if the assembler understands -march=rv*_zifencei.])])
5286     ;;
5287     loongarch*-*-*)
5288     gcc_GAS_CHECK_FEATURE([.dtprelword support],
5289       gcc_cv_as_loongarch_dtprelword, [2,18,0],,
5290       [.section .tdata,"awT",@progbits
5291 x:
5292         .word 2
5293         .text
5294         .dtprelword x+0x8000],,
5295       [AC_DEFINE(HAVE_AS_DTPRELWORD, 1,
5296           [Define if your assembler supports .dtprelword.])])
5297     gcc_GAS_CHECK_FEATURE([explicit relocation support],
5298       gcc_cv_as_loongarch_explicit_relocs,,
5299       [a:pcalau12i $t0,%pc_hi20(a)],,
5300       [AC_DEFINE(HAVE_AS_EXPLICIT_RELOCS, 1,
5301           [Define if your assembler supports explicit relocation.])])
5302     gcc_GAS_CHECK_FEATURE([eh_frame pcrel encoding support],
5303       gcc_cv_as_loongarch_eh_frame_pcrel_encoding_support,,
5304       [.cfi_startproc
5305        .cfi_personality 0x9b,a
5306        .cfi_lsda 0x1b,b
5307        .cfi_endproc],,
5308       [AC_DEFINE(HAVE_AS_EH_FRAME_PCREL_ENCODING_SUPPORT, 1,
5309           [Define if your assembler supports eh_frame pcrel encoding.])])
5310     ;;
5311     s390*-*-*)
5312     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
5313       gcc_cv_as_s390_gnu_attribute,,
5314       [.gnu_attribute 8,1],,
5315       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
5316           [Define if your assembler supports .gnu_attribute.])])
5317     gcc_GAS_CHECK_FEATURE([.machine and .machinemode support],
5318       gcc_cv_as_s390_machine_machinemode,,
5319       [ .machinemode push
5320         .machinemode pop
5321         .machine push
5322         .machine pop],,
5323       [AC_DEFINE(HAVE_AS_MACHINE_MACHINEMODE, 1,
5324           [Define if your assembler supports .machine and .machinemode.])])
5325     gcc_GAS_CHECK_FEATURE([architecture modifiers support],
5326       gcc_cv_as_s390_architecture_modifiers,,
5327       [ .machine z13+vx ],,
5328       [AC_DEFINE(HAVE_AS_ARCHITECTURE_MODIFIERS, 1,
5329           [Define if your assembler supports architecture modifiers.])])
5330     gcc_GAS_CHECK_FEATURE([vector load/store alignment hints],
5331       gcc_cv_as_s390_vector_loadstore_alignment_hints,,
5332       [ vl %v24,0(%r15),3 ],,
5333       [AC_DEFINE(HAVE_AS_VECTOR_LOADSTORE_ALIGNMENT_HINTS, 1,
5334           [Define if your assembler supports vl/vst/vlm/vstm with an optional alignment hint argument.])])
5335     gcc_GAS_CHECK_FEATURE([vector load/store alignment hints on z13],
5336       gcc_cv_as_s390_vector_loadstore_alignment_hints_on_z13, [-mzarch -march=z13],
5337       [ vl %v24,0(%r15),3 ],,
5338       [AC_DEFINE(HAVE_AS_VECTOR_LOADSTORE_ALIGNMENT_HINTS_ON_Z13, 1,
5339           [Define if your assembler supports vl/vst/vlm/vstm with an optional alignment hint argument on z13.])])
5340
5341     ;;
5342 esac
5343
5344 # Mips, LoongArch and HP-UX need the GNU assembler.
5345 # Linux on IA64 might be able to use the Intel assembler.
5346
5347 case "$target" in
5348   mips*-*-* | loongarch*-*-* | *-*-hpux* )
5349     if test x$gas_flag = xyes \
5350        || test x"$host" != x"$build" \
5351        || test ! -x "$gcc_cv_as" \
5352        || "$gcc_cv_as" -v < /dev/null 2>&1 | grep GNU > /dev/null; then
5353       :
5354     else
5355       echo "*** This configuration requires the GNU assembler" >&2
5356       exit 1
5357     fi
5358     ;;
5359 esac
5360
5361 # AMD GCN needs the LLVM assembler and linker.
5362 # Test that LLVM is at least 13.0.1.
5363 case "$target" in
5364   amdgcn-* | gcn-*)
5365     AC_MSG_CHECKING(llvm assembler version)
5366     gcc_cv_as_version="unknown"
5367     if test x$gcc_cv_as != x; then
5368       gcc_cv_as_version=`$gcc_cv_as --version 2>&1 | sed -ne '/version/s/.* \([[0-9]]\)/\1/p' || echo error`
5369       case "$gcc_cv_as_version" in
5370         13.0.[[1-9]]*) ;;          # 13.0.1+
5371         13.[[1-9]]*) ;;            # 13.1+
5372         1[[4-9]]*) ;;              # 14..19
5373         [[2-9]][[0-9]]*) ;;        # 20..99
5374         [[1-9]][[0-9]][[0-9]]*) ;; # 100+
5375         error) AC_MSG_ERROR([cannot determine LLVM version]) ;;
5376         *) AC_MSG_ERROR([LLVM 13.0.1 or later is required (found LLVM $gcc_cv_as_version)]) ;;
5377       esac
5378     fi
5379     AC_MSG_RESULT([$gcc_cv_as_version, ok])
5380     ;;
5381 esac
5382
5383 case "$target" in
5384   arm*)
5385     gcc_GAS_CHECK_FEATURE([assembler for arm accepts context-specific architecture extensions],
5386       gcc_cv_as_arm_option_extensions,
5387       [-march=armv8.1-m.main+mve],
5388       [.text
5389         .thumb
5390         .syntax unified
5391         vmov.f32 s0, s1],,
5392       [AC_DEFINE(HAVE_GAS_ARM_EXTENDED_ARCH, 1,
5393        [Define if your Arm assembler permits context-specific feature extensions.])])
5394 esac
5395
5396 # ??? Not all targets support dwarf2 debug_line, even within a version
5397 # of gas.  Moreover, we need to emit a valid instruction to trigger any
5398 # info to the output file.  So, as supported targets are added to gas 2.11,
5399 # add some instruction here to (also) show we expect this might work.
5400 # ??? Once 2.11 is released, probably need to add first known working
5401 # version to the per-target configury.
5402 case "$cpu_type" in
5403   aarch64 | alpha | arc | arm | avr | bfin | cris | csky | i386 | loongarch | m32c \
5404   | m68k | microblaze | mips | nds32 | nios2 | pa | riscv | rs6000 | score | sparc \
5405   | visium | xstormy16 | xtensa)
5406     insn="nop"
5407     ;;
5408   ia64 | s390)
5409     insn="nop 0"
5410     ;;
5411   mmix)
5412     insn="swym 0"
5413     ;;
5414 esac
5415 if test x"$insn" != x; then
5416  conftest_s="\
5417         .file 1 \"conftest.s\"
5418         .loc 1 3 0
5419         $insn"
5420  gcc_GAS_CHECK_FEATURE([dwarf2 debug_line support],
5421   gcc_cv_as_dwarf2_debug_line,,
5422   [$conftest_s],
5423   [if test x$gcc_cv_objdump != x \
5424    && $gcc_cv_objdump -h conftest.o 2> /dev/null \
5425       | grep debug_line > /dev/null 2>&1; then
5426      gcc_cv_as_dwarf2_debug_line=yes
5427    elif test x$gcc_cv_otool != x \
5428    && $gcc_cv_otool -l conftest.o 2> /dev/null \
5429       | grep debug_line > /dev/null 2>&1; then
5430      gcc_cv_as_dwarf2_debug_line=yes
5431    fi])
5432
5433 # The .debug_line file table must be in the exact order that
5434 # we specified the files, since these indices are also used
5435 # by DW_AT_decl_file.  Approximate this test by testing if
5436 # the assembler bitches if the same index is assigned twice.
5437  gcc_GAS_CHECK_FEATURE([buggy dwarf2 .file directive],
5438   gcc_cv_as_dwarf2_file_buggy,,
5439 [       .file 1 "foo.s"
5440         .file 1 "bar.s"])
5441
5442  if test $gcc_cv_as_dwarf2_debug_line = yes \
5443  && test $gcc_cv_as_dwarf2_file_buggy = no; then
5444     AC_DEFINE(HAVE_AS_DWARF2_DEBUG_LINE, 1,
5445   [Define if your assembler supports dwarf2 .file/.loc directives,
5446    and preserves file table indices exactly as given.])
5447
5448     if test $gcc_cv_as_leb128 = yes; then
5449         conftest_s="\
5450         .file 1 \"conftest.s\"
5451         .loc 1 3 0 view .LVU1
5452         $insn
5453         .data
5454         .uleb128 .LVU1
5455         .uleb128 .LVU1
5456 "
5457         gcc_GAS_CHECK_FEATURE([dwarf2 debug_view support],
5458           gcc_cv_as_dwarf2_debug_view,,
5459           [$conftest_s],,
5460           [AC_DEFINE(HAVE_AS_DWARF2_DEBUG_VIEW, 1,
5461   [Define if your assembler supports views in dwarf2 .loc directives.])])
5462     fi
5463  fi
5464
5465  gcc_GAS_CHECK_FEATURE([--gdwarf2 option],
5466   gcc_cv_as_gdwarf2_flag,
5467   [--gdwarf2], [$insn],,
5468   [AC_DEFINE(HAVE_AS_GDWARF2_DEBUG_FLAG, 1,
5469 [Define if your assembler supports the --gdwarf2 option.])])
5470
5471  gcc_GAS_CHECK_FEATURE([--gdwarf-5 option],
5472   gcc_cv_as_gdwarf_5_flag,
5473   [--gdwarf-5], [$insn],
5474   [if test x$gcc_cv_objdump != x \
5475       && $gcc_cv_objdump -Wi conftest.o 2>&1 \
5476          | grep DW_TAG_compile_unit > /dev/null 2>&1; then
5477      gcc_cv_as_gdwarf_5_flag=yes;
5478    fi],[AC_DEFINE(HAVE_AS_GDWARF_5_DEBUG_FLAG, 1,
5479 [Define if your assembler supports the --gdwarf-5 option.])])
5480
5481  case $target_os in
5482    win32 | pe | cygwin* | mingw32*)
5483      section_flags=\"dr\"
5484      function_type=".def foo; .scl 2; .type 32; .endef"
5485      function_size="";;
5486    *)
5487      section_flags=\"\",%progbits
5488      function_type=".type foo, %function"
5489      function_size=".size foo, .-foo";;
5490  esac
5491  dwarf4_debug_info_size=0x46
5492  dwarf4_high_pc_form=7
5493  dwarf4_debug_aranges_size=0x2c
5494  dwarf4_line_sz=9
5495  for dwarf4_addr_size in 8 4; do
5496    conftest_s="\
5497         .file   \"a.c\"
5498         .text
5499 .Ltext0:
5500         .p2align 4
5501         .globl  foo
5502         $function_type
5503 foo:
5504 .LFB0:
5505 .LM1:
5506         $insn
5507 .LM2:
5508 .LFE0:
5509         $function_size
5510 .Letext0:
5511         .section        .debug_info,$section_flags
5512 .Ldebug_info0:
5513         .4byte  $dwarf4_debug_info_size
5514         .2byte  0x4
5515         .4byte  .Ldebug_abbrev0
5516         .byte   0x$dwarf4_addr_size
5517         .byte   0x1
5518         .ascii \"GNU C17\\0\"
5519         .byte   0xc
5520         .ascii \"a.c\\0\"
5521         .ascii \"/\\0\"
5522         .${dwarf4_addr_size}byte        .Ltext0
5523         .${dwarf4_addr_size}byte        .Letext0-.Ltext0
5524         .4byte  .Ldebug_line0
5525         .byte   0x2
5526         .ascii \"foo\\0\"
5527         .byte   0x1
5528         .byte   0x2
5529         .byte   0x1
5530         .${dwarf4_addr_size}byte        .LFB0
5531         .${dwarf4_addr_size}byte        .LFE0-.LFB0
5532         .byte   0x1
5533         .byte   0x9c
5534         .byte   0
5535         .section        .debug_abbrev,$section_flags
5536 .Ldebug_abbrev0:
5537         .byte   0x1
5538         .byte   0x11
5539         .byte   0x1
5540         .byte   0x25
5541         .byte   0x8
5542         .byte   0x13
5543         .byte   0xb
5544         .byte   0x3
5545         .byte   0x8
5546         .byte   0x1b
5547         .byte   0x8
5548         .byte   0x11
5549         .byte   0x1
5550         .byte   0x12
5551         .byte   0x$dwarf4_high_pc_form
5552         .byte   0x10
5553         .byte   0x17
5554         .byte   0
5555         .byte   0
5556         .byte   0x2
5557         .byte   0x2e
5558         .byte   0
5559         .byte   0x3f
5560         .byte   0x19
5561         .byte   0x3
5562         .byte   0x8
5563         .byte   0x3a
5564         .byte   0xb
5565         .byte   0x3b
5566         .byte   0xb
5567         .byte   0x39
5568         .byte   0xb
5569         .byte   0x11
5570         .byte   0x1
5571         .byte   0x12
5572         .byte   0x$dwarf4_high_pc_form
5573         .byte   0x40
5574         .byte   0x18
5575         .byte   0
5576         .byte   0
5577         .byte   0
5578         .section        .debug_aranges,$section_flags
5579         .4byte  $dwarf4_debug_aranges_size
5580         .2byte  0x2
5581         .4byte  .Ldebug_info0
5582         .byte   0x8
5583         .byte   0
5584         .2byte  0
5585         .2byte  0
5586         .${dwarf4_addr_size}byte        .Ltext0
5587         .${dwarf4_addr_size}byte        .Letext0-.Ltext0
5588         .${dwarf4_addr_size}byte        0
5589         .${dwarf4_addr_size}byte        0
5590         .section        .debug_line,$section_flags
5591 .Ldebug_line0:
5592         .4byte  .LELT0-.LSLT0
5593 .LSLT0:
5594         .2byte  0x4
5595         .4byte  .LELTP0-.LASLTP0
5596 .LASLTP0:
5597         .byte   0x1
5598         .byte   0x1
5599         .byte   0x1
5600         .byte   0xf6
5601         .byte   0xf2
5602         .byte   0xd
5603         .byte   0
5604         .byte   0x1
5605         .byte   0x1
5606         .byte   0x1
5607         .byte   0x1
5608         .byte   0
5609         .byte   0
5610         .byte   0
5611         .byte   0x1
5612         .byte   0
5613         .byte   0
5614         .byte   0x1
5615         .byte   0
5616         .ascii \"a.c\\0\"
5617         .byte   0
5618         .byte   0
5619         .byte   0
5620         .byte   0
5621 .LELTP0:
5622         .byte   0
5623         .byte   0x$dwarf4_line_sz
5624         .byte   0x2
5625         .${dwarf4_addr_size}byte        .LM1
5626         .byte   0x18
5627         .byte   0x5
5628         .byte   0x1
5629         .byte   0
5630         .byte   0x$dwarf4_line_sz
5631         .byte   0x2
5632         .${dwarf4_addr_size}byte        .LM2
5633         .byte   0x1
5634         .byte   0x5
5635         .byte   0x1
5636         .byte   0
5637         .byte   0x$dwarf4_line_sz
5638         .byte   0x2
5639         .${dwarf4_addr_size}byte        .Letext0
5640         .byte   0
5641         .byte   0x1
5642         .byte   0x1
5643 .LELT0:
5644         .section        .debug_str,$section_flags
5645         .ident  \"GCC\"
5646 "
5647    dwarf4_success=no
5648    if test $dwarf4_addr_size = 4; then
5649      gcc_GAS_CHECK_FEATURE([assembly of compiler generated 32-bit .debug_line],
5650       gcc_cv_as_debug_line_32_flag,,
5651       [$conftest_s],,
5652       [dwarf4_success=yes])
5653    else
5654      gcc_GAS_CHECK_FEATURE([assembly of compiler generated 64-bit .debug_line],
5655       gcc_cv_as_debug_line_64_flag,,
5656       [$conftest_s],,
5657       [dwarf4_success=yes])
5658    fi
5659    if test $dwarf4_success = yes; then
5660      dwarf4_success=no
5661      gcc_GAS_CHECK_FEATURE([--gdwarf-4 not refusing compiler generated .debug_line],
5662       gcc_cv_as_dwarf_4_debug_line_flag,
5663       [--gdwarf-4], [$conftest_s],,
5664       [dwarf4_success=yes])
5665      break
5666    fi
5667    dwarf4_debug_info_size=0x36
5668    dwarf4_high_pc_form=6
5669    dwarf4_debug_aranges_size=0x1c
5670    dwarf4_line_sz=5
5671  done
5672
5673  if test $dwarf4_success = yes; then
5674    conftest_s="\
5675         .file   \"foo.c\"
5676         .text
5677 bar:
5678 #APP
5679 # 82 \"xxx.h\" 1
5680         $insn
5681 # 0 \"\" 2
5682 #NO_APP
5683         $insn
5684 foo:
5685         .file 1 \"foo.c\"
5686         $insn
5687         .file 2 \"foo.h\"
5688         ret
5689 "
5690    dwarf4_success=no
5691    gcc_GAS_CHECK_FEATURE([--gdwarf-4 with the APP marker],
5692      gcc_cv_as_dwarf_4_app_flag,
5693      [--gdwarf-4], [$conftest_s],, [dwarf4_success=yes])
5694  fi
5695
5696  if test $dwarf4_success = yes; then
5697    conftest_s="\
5698         .text
5699         .globl  foo
5700         $function_type
5701 foo:
5702         $insn
5703         $function_size
5704         .file   1 \"foo.c\"
5705 "
5706    gcc_GAS_CHECK_FEATURE([working --gdwarf-4/--gdwarf-5 for all sources],
5707      gcc_cv_as_working_gdwarf_n_flag,
5708      [--gdwarf-4],
5709      [$conftest_s],
5710      [changequote(,)dnl
5711       if test x$gcc_cv_objdump != x \
5712          && $gcc_cv_objdump -W conftest.o 2>&1 \
5713                 | grep conftest.s > /dev/null 2>&1; then
5714         gcc_cv_as_working_gdwarf_n_flag=no
5715       else
5716         gcc_cv_as_working_gdwarf_n_flag=yes
5717       fi
5718       changequote([,])dnl])
5719    if test $gcc_cv_as_working_gdwarf_n_flag = yes; then
5720      AC_DEFINE(HAVE_AS_WORKING_DWARF_N_FLAG, 1,
5721 [Define if your assembler supports --gdwarf-4/--gdwarf-5 even with
5722  compiler generated .debug_line.])
5723    fi
5724  fi
5725
5726  gcc_GAS_CHECK_FEATURE([--debug-prefix-map option],
5727   gcc_cv_as_debug_prefix_map_flag,
5728   [--debug-prefix-map /a=/b], [$insn],,
5729   [AC_DEFINE(HAVE_AS_DEBUG_PREFIX_MAP, 1,
5730 [Define if your assembler supports the --debug-prefix-map option.])])
5731 fi
5732
5733 gcc_GAS_CHECK_FEATURE([compressed debug sections],
5734   gcc_cv_as_compress_debug,,,
5735   [# gas compiled without zlib cannot compress debug sections and warns
5736    # about it, but still exits successfully.  So check for this, too.
5737    if $gcc_cv_as --compress-debug-sections -o conftest.o conftest.s 2>&1 | grep -i warning > /dev/null
5738    then
5739      gcc_cv_as_compress_debug=0
5740    elif $gcc_cv_as --compress-debug-sections=zlib -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      # Since binutils 2.40, gas supports --compress-debug-sections=zstd.
5746      if $gcc_cv_as --compress-debug-sections=zstd -o conftest.o conftest.s > /dev/null 2>&1
5747      then
5748        gcc_cv_as_compress_debug=2
5749      fi
5750    else
5751      gcc_cv_as_compress_debug=0
5752    fi])
5753 AC_DEFINE_UNQUOTED(HAVE_AS_COMPRESS_DEBUG, $gcc_cv_as_compress_debug,
5754 [Define to the level of your assembler's compressed debug section support.])
5755 AC_DEFINE_UNQUOTED(AS_COMPRESS_DEBUG_OPTION, "$gcc_cv_as_compress_debug_option",
5756 [Define to the assembler option to enable compressed debug sections.])
5757 AC_DEFINE_UNQUOTED(AS_NO_COMPRESS_DEBUG_OPTION, "$gcc_cv_as_no_compress_debug_option",
5758 [Define to the assembler option to disable compressed debug sections.])
5759
5760 gcc_GAS_CHECK_FEATURE([.lcomm with alignment], gcc_cv_as_lcomm_with_alignment,,
5761 [.lcomm bar,4,16],,
5762 [AC_DEFINE(HAVE_GAS_LCOMM_WITH_ALIGNMENT, 1,
5763   [Define if your assembler supports .lcomm with an alignment field.])])
5764
5765 if test x$with_sysroot = x && test x$host = x$target \
5766    && test "$prefix" != "/usr" && test "x$prefix" != "x$local_prefix" \
5767    && test "$prefix" != "NONE"; then
5768   AC_DEFINE_UNQUOTED(PREFIX_INCLUDE_DIR, "$prefix/include",
5769 [Define to PREFIX/include if cpp should also search that directory.])
5770 fi
5771
5772 # Determine the version of glibc, if any, used on the target.
5773 AC_MSG_CHECKING([for target glibc version])
5774 AC_ARG_WITH([glibc-version],
5775   [AS_HELP_STRING([--with-glibc-version=M.N],
5776     [assume GCC used with glibc version M.N or later])], [
5777 if [echo "$with_glibc_version" | grep '^[0-9][0-9]*\.[0-9][0-9]*$']; then
5778   glibc_version_major=`echo "$with_glibc_version" | sed -e 's/\..*//'`
5779   glibc_version_minor=`echo "$with_glibc_version" | sed -e 's/.*\.//'`
5780 else
5781   AC_MSG_ERROR([option --with-glibc-version requires a version number M.N])
5782 fi], [
5783 glibc_version_major=0
5784 glibc_version_minor=0
5785 [if test -f $target_header_dir/features.h \
5786   && glibc_version_major_define=`$EGREP '^[     ]*#[    ]*define[       ]+__GLIBC__[    ]+[0-9]' $target_header_dir/features.h` \
5787   && glibc_version_minor_define=`$EGREP '^[     ]*#[    ]*define[       ]+__GLIBC_MINOR__[      ]+[0-9]' $target_header_dir/features.h`; then
5788   glibc_version_major=`echo "$glibc_version_major_define" | sed -e 's/.*__GLIBC__[      ]*//'`
5789   glibc_version_minor=`echo "$glibc_version_minor_define" | sed -e 's/.*__GLIBC_MINOR__[        ]*//'`
5790 fi]])
5791 AC_MSG_RESULT([$glibc_version_major.$glibc_version_minor])
5792 AC_DEFINE_UNQUOTED([TARGET_GLIBC_MAJOR], [$glibc_version_major],
5793 [GNU C Library major version number used on the target, or 0.])
5794 AC_DEFINE_UNQUOTED([TARGET_GLIBC_MINOR], [$glibc_version_minor],
5795 [GNU C Library minor version number used on the target, or 0.])
5796
5797 AC_ARG_ENABLE(gnu-unique-object,
5798  [AS_HELP_STRING([--enable-gnu-unique-object],
5799    [enable the use of the @gnu_unique_object ELF extension on glibc systems])],
5800  [case $enable_gnu_unique_object in
5801     yes | no) ;;
5802     *) AC_MSG_ERROR(['$enable_gnu_unique_object' is an invalid value for --enable-gnu-unique-object.
5803 Valid choices are 'yes' and 'no'.]) ;;
5804   esac],
5805  [gcc_GAS_CHECK_FEATURE([gnu_unique_object], gcc_cv_as_gnu_unique_object,,
5806    [.type foo, '$target_type_format_char'gnu_unique_object],,
5807 # We need to unquote above to to use the definition from config.gcc.
5808 # Also check for ld.so support, i.e. glibc 2.11 or higher.
5809    [GCC_GLIBC_VERSION_GTE_IFELSE([2], [11], [enable_gnu_unique_object=yes], )]
5810    )])
5811 if test x$enable_gnu_unique_object = xyes; then
5812   AC_DEFINE(HAVE_GAS_GNU_UNIQUE_OBJECT, 1,
5813    [Define if your assembler supports @gnu_unique_object.])
5814 fi
5815
5816 AC_CACHE_CHECK([assembler for tolerance to line number 0],
5817  [gcc_cv_as_line_zero],
5818  [gcc_cv_as_line_zero=no
5819   if test "x$gcc_cv_as" != x; then
5820     { echo '# 1 "test.s" 1'; echo '# 0 "" 2'; } > conftest.s
5821     if AC_TRY_COMMAND([$gcc_cv_as -o conftest.o conftest.s >&AS_MESSAGE_LOG_FD 2>conftest.out]) &&
5822        test "x`cat conftest.out`" = x
5823     then
5824       gcc_cv_as_line_zero=yes
5825     else
5826       echo "configure: failed program was" >&AS_MESSAGE_LOG_FD
5827       cat conftest.s >&AS_MESSAGE_LOG_FD
5828       echo "configure: error output was" >&AS_MESSAGE_LOG_FD
5829       cat conftest.out >&AS_MESSAGE_LOG_FD
5830     fi
5831     rm -f conftest.o conftest.s conftest.out
5832   fi])
5833 if test "x$gcc_cv_as_line_zero" = xyes; then
5834   AC_DEFINE([HAVE_AS_LINE_ZERO], 1,
5835 [Define if the assembler won't complain about a line such as # 0 "" 2.])
5836 fi
5837
5838 AC_MSG_CHECKING(support for thin archives)
5839 thin_archive_support=no
5840 echo 'int main (void) { return 0; }' > conftest.c
5841 if ($AR --version | sed 1q | grep "GNU ar" \
5842     && $CC $CFLAGS -c conftest.c \
5843     && $AR rcT conftest.a conftest.o \
5844     && $CC $CFLAGS $LDFLAGS -o conftest conftest.a) >/dev/null 2>&1; then
5845   thin_archive_support=yes
5846 fi
5847 rm -f conftest.c conftest.o conftest.a conftest
5848 AC_MSG_RESULT($thin_archive_support)
5849 AC_SUBST(thin_archive_support)
5850
5851 AC_MSG_CHECKING(linker PT_GNU_EH_FRAME support)
5852 gcc_cv_ld_eh_frame_hdr=no
5853 if test $in_tree_ld = yes ; then
5854   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 12 -o "$gcc_cv_gld_major_version" -gt 2 \
5855      && test $in_tree_ld_is_elf = yes; then
5856     gcc_cv_ld_eh_frame_hdr=yes
5857   fi
5858 elif test x$gcc_cv_ld != x; then
5859   if echo "$ld_ver" | grep GNU > /dev/null; then
5860     # Check if linker supports --eh-frame-hdr option
5861     if $gcc_cv_ld --help 2>&1 | grep eh-frame-hdr > /dev/null; then
5862       gcc_cv_ld_eh_frame_hdr=yes
5863     fi
5864   else
5865     case "$target" in
5866       *-*-solaris2*)
5867         # Sun ld has various bugs in .eh_frame_hdr support before version 1.2251.
5868         if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 2251; then
5869           gcc_cv_ld_eh_frame_hdr=yes
5870         fi
5871         ;;
5872     esac
5873   fi
5874 fi
5875 GCC_TARGET_TEMPLATE([HAVE_LD_EH_FRAME_HDR])
5876 if test x"$gcc_cv_ld_eh_frame_hdr" = xyes; then
5877         AC_DEFINE(HAVE_LD_EH_FRAME_HDR, 1,
5878 [Define if your linker supports .eh_frame_hdr.])
5879 fi
5880 AC_MSG_RESULT($gcc_cv_ld_eh_frame_hdr)
5881
5882 AC_MSG_CHECKING(linker CIEv3 in .eh_frame support)
5883 gcc_cv_ld_eh_frame_ciev3=no
5884 if test $in_tree_ld = yes ; then
5885   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
5886      && test $in_tree_ld_is_elf = yes; then
5887     gcc_cv_ld_eh_frame_ciev3=yes
5888   fi
5889 elif test x$gcc_cv_ld != x; then
5890   if echo "$ld_ver" | grep GNU > /dev/null; then
5891     gcc_cv_ld_eh_frame_ciev3=yes
5892     if test 0"$ld_date" -lt 20040513; then
5893       if test -n "$ld_date"; then
5894         # If there was date string, but was earlier than 2004-05-13, fail
5895         gcc_cv_ld_eh_frame_ciev3=no
5896       elif test "$ld_vers_major" -lt 2; then
5897         gcc_cv_ld_eh_frame_ciev3=no
5898       elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
5899         gcc_cv_ld_eh_frame_ciev3=no
5900       fi
5901     fi
5902   else
5903     case "$target" in
5904       *-*-solaris2*)
5905         # Sun ld added support for CIE v3 in .eh_frame in Solaris 11.1.
5906         if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 2324; then
5907           gcc_cv_ld_eh_frame_ciev3=yes
5908         fi
5909         ;;
5910     esac
5911   fi
5912 fi
5913 AC_DEFINE_UNQUOTED(HAVE_LD_EH_FRAME_CIEV3,
5914   [`if test x"$gcc_cv_ld_eh_frame_ciev3" = xyes; then echo 1; else echo 0; fi`],
5915   [Define 0/1 if your linker supports CIE v3 in .eh_frame.])
5916 AC_MSG_RESULT($gcc_cv_ld_eh_frame_ciev3)
5917
5918 AC_MSG_CHECKING(linker position independent executable support)
5919 gcc_cv_ld_pie=no
5920 if test $in_tree_ld = yes ; then
5921   case "$target" in
5922     # Full PIE support on Solaris was only introduced in gld 2.26.
5923     *-*-solaris2*)  gcc_gld_pie_min_version=26 ;;
5924     *)              gcc_gld_pie_min_version=15 ;;
5925   esac
5926   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 \
5927      && test $in_tree_ld_is_elf = yes; then
5928     gcc_cv_ld_pie=yes
5929   fi
5930 elif test x$gcc_cv_ld != x; then
5931   # Check if linker supports -pie option
5932   if $gcc_cv_ld --help 2>&1 | grep -- -pie > /dev/null; then
5933     gcc_cv_ld_pie=yes
5934     case "$target" in
5935       *-*-solaris2*)
5936         if echo "$ld_ver" | grep GNU > /dev/null \
5937           && test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 26; then
5938           gcc_cv_ld_pie=no
5939         fi
5940         ;;
5941     esac
5942   else
5943     case "$target" in
5944       *-*-solaris2.1[[1-9]]*)
5945         # Solaris 11.3 added PIE support.
5946         if $gcc_cv_ld -z help 2>&1 | grep -- type.*pie > /dev/null; then
5947           gcc_cv_ld_pie=yes
5948         fi
5949         ;;
5950     esac
5951   fi
5952 fi
5953 if test x"$gcc_cv_ld_pie" = xyes; then
5954         AC_DEFINE(HAVE_LD_PIE, 1,
5955 [Define if your linker supports PIE option.])
5956 fi
5957 AC_MSG_RESULT($gcc_cv_ld_pie)
5958
5959 AC_MSG_CHECKING(linker PIE support with copy reloc)
5960 gcc_cv_ld_pie_copyreloc=no
5961 if test $gcc_cv_ld_pie = yes ; then
5962   if test $in_tree_ld = yes ; then
5963     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 25 -o "$gcc_cv_gld_major_version" -gt 2; then
5964       gcc_cv_ld_pie_copyreloc=yes
5965     fi
5966   elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
5967     # Check if linker supports -pie option with copy reloc
5968     case "$target" in
5969     i?86-*-linux* | x86_64-*-linux*)
5970       cat > conftest1.s <<EOF
5971         .globl  a_glob
5972         .data
5973         .type   a_glob, @object
5974         .size   a_glob, 4
5975 a_glob:
5976         .long   2
5977 EOF
5978       cat > conftest2.s <<EOF
5979         .text
5980         .globl  main
5981         .type   main, @function
5982 main:
5983         movl    %eax, a_glob(%rip)
5984         .size   main, .-main
5985         .globl  ptr
5986         .section        .data.rel,"aw",@progbits
5987         .type   ptr, @object
5988 ptr:
5989         .quad   a_glob
5990 EOF
5991       if $gcc_cv_as --64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
5992          && $gcc_cv_ld -shared -melf_x86_64 -o conftest1.so conftest1.o > /dev/null 2>&1 \
5993          && $gcc_cv_as --64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
5994          && $gcc_cv_ld -pie -melf_x86_64 -o conftest conftest2.o conftest1.so > /dev/null 2>&1; then
5995         gcc_cv_ld_pie_copyreloc=yes
5996       fi
5997       rm -f conftest conftest1.so conftest1.o conftest2.o conftest1.s conftest2.s
5998       ;;
5999     esac
6000   fi
6001 fi
6002 AC_DEFINE_UNQUOTED(HAVE_LD_PIE_COPYRELOC,
6003   [`if test x"$gcc_cv_ld_pie_copyreloc" = xyes; then echo 1; else echo 0; fi`],
6004   [Define 0/1 if your linker supports -pie option with copy reloc.])
6005 AC_MSG_RESULT($gcc_cv_ld_pie_copyreloc)
6006
6007 AC_MSG_CHECKING(linker EH-compatible garbage collection of sections)
6008 gcc_cv_ld_eh_gc_sections=no
6009 if test $in_tree_ld = yes ; then
6010   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 17 -o "$gcc_cv_gld_major_version" -gt 2 \
6011      && test $in_tree_ld_is_elf = yes; then
6012     gcc_cv_ld_eh_gc_sections=yes
6013   fi
6014 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
6015   cat > conftest.s <<EOF
6016         .section        .text
6017 .globl _start
6018         .type _start, @function
6019 _start:
6020         .long foo
6021         .size _start, .-_start
6022         .section        .text.foo,"ax",@progbits
6023         .type foo, @function
6024 foo:
6025         .long 0
6026         .size foo, .-foo
6027         .section        .gcc_except_table.foo,"a",@progbits
6028 .L0:
6029         .long 0
6030         .section        .eh_frame,"a",@progbits
6031         .long .L0
6032 EOF
6033   if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
6034     if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
6035          | grep "gc-sections option ignored" > /dev/null; then
6036       gcc_cv_ld_eh_gc_sections=no
6037     elif $gcc_cv_objdump -h conftest 2> /dev/null \
6038          | grep gcc_except_table > /dev/null; then
6039       gcc_cv_ld_eh_gc_sections=yes
6040       # If no COMDAT groups, the compiler will emit .gnu.linkonce.t. sections.
6041       if test x$gcc_cv_as_comdat_group != xyes; then
6042         gcc_cv_ld_eh_gc_sections=no
6043         cat > conftest.s <<EOF
6044         .section        .text
6045 .globl _start
6046         .type _start, @function
6047 _start:
6048         .long foo
6049         .size _start, .-_start
6050         .section        .gnu.linkonce.t.foo,"ax",@progbits
6051         .type foo, @function
6052 foo:
6053         .long 0
6054         .size foo, .-foo
6055         .section        .gcc_except_table.foo,"a",@progbits
6056 .L0:
6057         .long 0
6058         .section        .eh_frame,"a",@progbits
6059         .long .L0
6060 EOF
6061         if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
6062           if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
6063                | grep "gc-sections option ignored" > /dev/null; then
6064             gcc_cv_ld_eh_gc_sections=no
6065           elif $gcc_cv_objdump -h conftest 2> /dev/null \
6066                | grep gcc_except_table > /dev/null; then
6067             gcc_cv_ld_eh_gc_sections=yes
6068           fi
6069         fi
6070       fi
6071     fi
6072   fi
6073   rm -f conftest.s conftest.o conftest
6074 fi
6075 case "$target" in
6076   hppa*-*-linux*)
6077     # ??? This apparently exposes a binutils bug with PC-relative relocations.
6078     gcc_cv_ld_eh_gc_sections=no
6079     ;;
6080 esac
6081 if test x$gcc_cv_ld_eh_gc_sections = xyes; then
6082         AC_DEFINE(HAVE_LD_EH_GC_SECTIONS, 1,
6083   [Define if your linker supports garbage collection of
6084    sections in presence of EH frames.])
6085 fi
6086 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections)
6087
6088 AC_MSG_CHECKING(linker EH garbage collection of sections bug)
6089 gcc_cv_ld_eh_gc_sections_bug=no
6090 if test $in_tree_ld = yes ; then
6091   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -lt 19 -o "$gcc_cv_gld_major_version" -lt 2 \
6092      && test $in_tree_ld_is_elf = yes; then
6093     gcc_cv_ld_eh_gc_sections_bug=yes
6094   fi
6095 elif test x$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
6096   gcc_cv_ld_eh_gc_sections_bug=yes
6097   cat > conftest.s <<EOF
6098         .section        .text
6099 .globl _start
6100         .type _start, @function
6101 _start:
6102         .long foo
6103         .size _start, .-_start
6104         .section        .text.startup.foo,"ax",@progbits
6105         .type foo, @function
6106 foo:
6107         .long 0
6108         .size foo, .-foo
6109         .section        .gcc_except_table.foo,"a",@progbits
6110 .L0:
6111         .long 0
6112         .section        .eh_frame,"a",@progbits
6113         .long .L0
6114 EOF
6115   if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
6116     if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
6117          | grep "gc-sections option ignored" > /dev/null; then
6118       :
6119     elif $gcc_cv_objdump -h conftest 2> /dev/null \
6120          | grep gcc_except_table > /dev/null; then
6121       gcc_cv_ld_eh_gc_sections_bug=no
6122     fi
6123   fi
6124   rm -f conftest.s conftest.o conftest
6125 fi
6126 if test x$gcc_cv_ld_eh_gc_sections_bug = xyes; then
6127         AC_DEFINE(HAVE_LD_EH_GC_SECTIONS_BUG, 1,
6128   [Define if your linker has buggy garbage collection of
6129    sections support when .text.startup.foo like sections are used.])
6130 fi
6131 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections_bug)
6132
6133 AC_MSG_CHECKING(linker for compressed debug sections)
6134 # GNU ld/gold support --compressed-debug-sections=zlib since binutils 2.26.
6135 if $gcc_cv_ld --help 2>&1 | grep -- '--compress-debug-sections.*\<zlib-gabi\>' > /dev/null; then
6136     gcc_cv_ld_compress_debug=1
6137     gcc_cv_ld_compress_debug_option="--compress-debug-sections"
6138     # Detect zstd debug section compression support
6139     if $gcc_cv_ld --help 2>&1 | grep -- '--compress-debug-sections.*\<zstd\>' > /dev/null; then
6140       gcc_cv_ld_compress_debug=2
6141     fi
6142 else
6143 changequote(,)dnl
6144   case "${target}" in
6145     *-*-solaris2*)
6146       # Introduced in Solaris 11.2.
6147       if $gcc_cv_ld --help 2>&1 | grep -- '-z compress-sections' > /dev/null; then
6148         gcc_cv_ld_compress_debug=1
6149         gcc_cv_ld_compress_debug_option="-z compress-sections"
6150       else
6151         gcc_cv_ld_compress_debug=0
6152       fi
6153       ;;
6154     *)
6155       # Assume linkers other than GNU ld don't support compessed debug
6156       # sections.
6157       gcc_cv_ld_compress_debug=0
6158       ;;
6159   esac
6160 changequote([,])dnl
6161 fi
6162 AC_DEFINE_UNQUOTED(HAVE_LD_COMPRESS_DEBUG, $gcc_cv_ld_compress_debug,
6163 [Define to the level of your linker's compressed debug section support.])
6164 AC_DEFINE_UNQUOTED(LD_COMPRESS_DEBUG_OPTION, "$gcc_cv_ld_compress_debug_option",
6165 [Define to the linker option to enable compressed debug sections.])
6166 AC_MSG_RESULT($gcc_cv_ld_compress_debug)
6167
6168 if test x"$ld64_flag" = x"yes"; then
6169
6170   # Set defaults for possibly untestable items.
6171   gcc_cv_ld64_export_dynamic=0
6172   gcc_cv_ld64_platform_version=0
6173
6174   if test "$build" = "$host"; then
6175     darwin_try_test=1
6176   else
6177     darwin_try_test=0
6178   fi
6179
6180   # On Darwin, because of FAT library support, it is often possible to execute
6181   # exes from compatible archs even when the host differs from the build system.
6182   case "$build","$host" in
6183     x86_64-*-darwin*,i?86-*-darwin* | powerpc64*-*-darwin*,powerpc*-*-darwin*)
6184         darwin_try_test=1;;
6185     *) ;;
6186   esac
6187
6188   # If the configurer specified a minimum ld64 version to be supported, then use
6189   # that to determine feature support.
6190   if test x"${gcc_cv_ld64_version}" != x; then
6191     AC_MSG_CHECKING(ld64 specified version)
6192     gcc_cv_ld64_major=`echo "$gcc_cv_ld64_version" | sed -e 's/\..*//'`
6193     AC_MSG_RESULT($gcc_cv_ld64_major)
6194     if test "$gcc_cv_ld64_major" -ge 236; then
6195       gcc_cv_ld64_export_dynamic=1
6196     fi
6197     if test "$gcc_cv_ld64_major" -ge 512; then
6198       gcc_cv_ld64_platform_version=1
6199     fi
6200   elif test -x "$gcc_cv_ld" -a "$darwin_try_test" -eq 1; then
6201     # If the version was not specified, try to find it.
6202     AC_MSG_CHECKING(linker version)
6203     if test x"${gcc_cv_ld64_version}" = x; then
6204       gcc_cv_ld64_version=`$gcc_cv_ld -v 2>&1 | grep ld64 | sed s/.*ld64-// | awk '{print $1}'`
6205     fi
6206     AC_MSG_RESULT($gcc_cv_ld64_version)
6207
6208     AC_MSG_CHECKING(linker for -export_dynamic support)
6209     gcc_cv_ld64_export_dynamic=1
6210     if $gcc_cv_ld -export_dynamic < /dev/null 2>&1 | grep 'unknown option' > /dev/null; then
6211       gcc_cv_ld64_export_dynamic=0
6212     fi
6213     AC_MSG_RESULT($gcc_cv_ld64_export_dynamic)
6214
6215     AC_MSG_CHECKING(linker for -platform_version support)
6216     gcc_cv_ld64_platform_version=1
6217     if $gcc_cv_ld -platform_version macos 10.5 0.0 < /dev/null 2>&1 | grep 'unknown option' > /dev/null; then
6218       gcc_cv_ld64_platform_version=0
6219     fi
6220     AC_MSG_RESULT($gcc_cv_ld64_platform_version)
6221   fi
6222
6223   if test x"${gcc_cv_ld64_version}" != x; then
6224     AC_DEFINE_UNQUOTED(LD64_VERSION, "${gcc_cv_ld64_version}",
6225       [Define to ld64 version.])
6226   fi
6227
6228   AC_DEFINE_UNQUOTED(LD64_HAS_EXPORT_DYNAMIC, $gcc_cv_ld64_export_dynamic,
6229   [Define to 1 if ld64 supports '-export_dynamic'.])
6230
6231   AC_DEFINE_UNQUOTED(LD64_HAS_PLATFORM_VERSION, $gcc_cv_ld64_platform_version,
6232   [Define to 1 if ld64 supports '-platform_version'.])
6233 fi
6234
6235 if test x"$dsymutil_flag" = x"yes"; then
6236
6237     # If the user specified a dsymutil path, then we will already have the
6238     # version string, otherwise, pick it up.
6239     if test x"$gcc_cv_dsymutil" = x; then
6240         AC_MSG_WARN([dsymutil is a required tool for this system, but not found])
6241         dsymutil_vers="tool unspecified"
6242     elif test x"$dsymutil_vers" = x; then
6243         dsymutil_vers=`$gcc_cv_dsymutil -v /dev/null 2>&1`
6244     fi
6245
6246     dsymutil_temp=`echo $dsymutil_vers | sed 1q`
6247     AC_MSG_CHECKING(dsymutil version "$dsymutil_temp")
6248     if echo $dsymutil_temp | grep dwarfutils- > /dev/null; then
6249       dsymutil_kind=DWARFUTILS
6250       dsymutil_vers=`echo $dsymutil_temp | sed 's/.*dwarfutils-\([[0-9\.]]*\).*/\1/'`
6251     elif echo $dsymutil_temp | grep clang- > /dev/null; then
6252       dsymutil_kind=CLANG
6253       dsymutil_vers=`echo $dsymutil_temp | sed 's/.*clang-\([[0-9\.]]*\).*/\1/'`
6254     elif echo $dsymutil_temp | grep 'LLVM version ' > /dev/null; then
6255       dsymutil_kind=LLVM
6256       dsymutil_vers=`echo $dsymutil_temp | sed 's/.*LLVM\ version\ \([[0-9\.]]*\).*/\1/'`
6257     else
6258       dsymutil_kind=UNKNOWN
6259       dsymutil_vers="0.0"
6260     fi
6261     dsymutil_major=`expr "$dsymutil_vers" : '\([[0-9]]*\)'`
6262     dsymutil_minor=`expr "$dsymutil_vers" : '[[0-9]]*\.\([[0-9]]*\)'`
6263     dsymutil_tiny=`expr "$dsymutil_vers" : '[[0-9]]*\.[[0-9]]*\.\([[0-9]]*\)'`
6264     if test x"${dsymutil_minor}" = x; then
6265       dsymutil_minor=0
6266     fi
6267     if test x"${dsymutil_tiny}" = x; then
6268       dsymutil_tiny=0
6269     fi
6270     AC_DEFINE_UNQUOTED(DSYMUTIL_VERSION, [$dsymutil_kind,${dsymutil_major},${dsymutil_minor},${dsymutil_tiny}],
6271         [Define to the dsymutil version.])
6272     AC_MSG_RESULT($dsymutil_vers : $dsymutil_kind ${dsymutil_major} ${dsymutil_minor} ${dsymutil_tiny} )
6273 fi
6274
6275 case $target_os in
6276   win32 | pe | cygwin* | mingw32*)
6277     AC_MSG_CHECKING(broken PE linker dwarf5 support)
6278     gcc_cv_ld_broken_pe_dwarf5=yes
6279     if test $in_tree_ld = yes ; then
6280       if grep -q '\.debug_loclists.*BLOCK.*__section_alignment__.*NOLOAD.*:' \
6281            $gcc_cv_ld_gld_srcdir/scripttempl/pe*.sc \
6282          && grep -q '\.debug_rnglists.*BLOCK.*__section_alignment__.*NOLOAD.*:' \
6283               $gcc_cv_ld_gld_srcdir/scripttempl/pe*.sc; then
6284         gcc_cv_ld_broken_pe_dwarf5=no
6285       fi
6286     else
6287       if $gcc_cv_ld --verbose 2>&1 | grep -q '\.debug_loclists.*BLOCK.*__section_alignment__.*NOLOAD.*:' \
6288          && $gcc_cv_ld --verbose 2>&1 | grep -q '\.debug_rnglists.*BLOCK.*__section_alignment__.*NOLOAD.*:'; then
6289         gcc_cv_ld_broken_pe_dwarf5=no
6290       fi
6291     fi
6292     if test x$gcc_cv_ld_broken_pe_dwarf5 = xyes; then
6293       AC_DEFINE(HAVE_LD_BROKEN_PE_DWARF5, 1,
6294                 [Define if the PE linker has broken DWARF 5 support.])
6295     fi
6296     AC_MSG_RESULT($gcc_cv_ld_broken_pe_dwarf5)
6297
6298     AC_MSG_CHECKING(PE linker --disable-dynamicbase support)
6299     gcc_cv_ld_disable_dynamicbase=no
6300     if test $in_tree_ld = yes; then
6301       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 36 -o "$gcc_cv_gld_major_version" -gt 2; then \
6302         gcc_cv_ld_disable_dynamicbase=yes
6303       fi
6304     else
6305       if $gcc_cv_ld --help 2>&1 | grep -q 'disable\-]dynamicbase' > /dev/null; then
6306         gcc_cv_ld_disable_dynamicbase=yes
6307       fi
6308     fi
6309     if test x"$gcc_cv_ld_disable_dynamicbase" = xyes; then
6310       AC_DEFINE(HAVE_LD_PE_DISABLE_DYNAMICBASE, 1,
6311                 [Define if the PE linker supports --disable-dynamicbase option.])
6312     fi
6313     AC_MSG_RESULT($gcc_cv_ld_disable_dynamicbase)
6314     ;;
6315 esac
6316
6317 # --------
6318 # UNSORTED
6319 # --------
6320
6321 AC_CACHE_CHECK(linker --as-needed support,
6322 gcc_cv_ld_as_needed,
6323 [gcc_cv_ld_as_needed=no
6324 gcc_cv_ld_as_needed_option='--as-needed'
6325 gcc_cv_ld_no_as_needed_option='--no-as-needed'
6326 if test $in_tree_ld = yes ; then
6327   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
6328      && test $in_tree_ld_is_elf = yes; then
6329     gcc_cv_ld_as_needed=yes
6330     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 28; then
6331       gcc_cv_ld_as_needed_option='--push-state --as-needed'
6332       gcc_cv_ld_no_as_needed_option='--pop-state'
6333     fi
6334   fi
6335 elif test x$gcc_cv_ld != x; then
6336   # Check if linker supports --as-needed and --no-as-needed options
6337   if $gcc_cv_ld --help 2>&1 | grep as-needed > /dev/null; then
6338     gcc_cv_ld_as_needed=yes
6339     if $gcc_cv_ld --help 2>&1 | grep push-state > /dev/null \
6340        && $gcc_cv_ld --help 2>&1 | grep pop-state > /dev/null \
6341        && echo "$ld_ver" | grep GNU > /dev/null \
6342        && test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -ge 28; then
6343       # Use these options only when both ld.bfd and ld.gold support
6344       # --push-state/--pop-state, which unfortunately wasn't added
6345       # at the same time.
6346       gcc_cv_ld_as_needed_option='--push-state --as-needed'
6347       gcc_cv_ld_no_as_needed_option='--pop-state'
6348     fi
6349   fi
6350   case "$target:$gnu_ld" in
6351     *-*-solaris2*:no)
6352       # Solaris 2 ld always supports -z ignore/-z record.  Prefer the native
6353       # forms.
6354       gcc_cv_ld_as_needed=yes
6355       gcc_cv_ld_as_needed_option="-z ignore"
6356       gcc_cv_ld_no_as_needed_option="-z record"
6357       ;;
6358   esac
6359 fi
6360 # --as-needed/-z ignore can only be used if libgcc_s.so.1 uses
6361 # dl_iterate_phdr, i.e. since Solaris 11.
6362 case "$target" in
6363   *-*-solaris2.1[[1-9]]*)
6364     case "$target" in
6365     i?86-*-* | x86_64-*-*)
6366       if echo "$ld_ver" | grep GNU > /dev/null; then
6367         # Doesn't work with gld on Solaris/x86 due to PR ld/12320.
6368         gcc_cv_ld_as_needed=no
6369       fi
6370       ;;
6371     esac
6372     ;;
6373   *-*-solaris2*)
6374     gcc_cv_ld_as_needed=no
6375     ;;
6376 esac
6377 ])
6378 if test x"$gcc_cv_ld_as_needed" = xyes; then
6379         AC_DEFINE(HAVE_LD_AS_NEEDED, 1,
6380 [Define if your linker supports --as-needed/--no-as-needed or equivalent options.])
6381         AC_DEFINE_UNQUOTED(LD_AS_NEEDED_OPTION, "$gcc_cv_ld_as_needed_option",
6382 [Define to the linker option to ignore unused dependencies.])
6383         AC_DEFINE_UNQUOTED(LD_NO_AS_NEEDED_OPTION, "$gcc_cv_ld_no_as_needed_option",
6384 [Define to the linker option to keep unused dependencies.])
6385 fi
6386
6387 AC_MSG_CHECKING(linker mapfile support for clearing hardware capabilities)
6388 saved_LDFLAGS="$LDFLAGS"
6389 for clearcap_map in sol2-clearcapv2.map sol2-clearcap.map; do
6390   LDFLAGS="$saved_LDFLAGS -Wl,-M,${srcdir}/config/$clearcap_map"
6391   AC_LINK_IFELSE([AC_LANG_SOURCE([int main(void) {return 0;}])],
6392     [gcc_cv_ld_clearcap=yes; break], [gcc_cv_ld_clearcap=no])
6393 done
6394 LDFLAGS="$saved_LDFLAGS"
6395 if test "x$gcc_cv_ld_clearcap" = xyes; then
6396   AC_DEFINE([HAVE_LD_CLEARCAP], 1,
6397 [Define if the linker supports clearing hardware capabilities via mapfile.])
6398   AC_CONFIG_LINKS([clearcap.map:${srcdir}/config/$clearcap_map])
6399 fi
6400 AC_MSG_RESULT($gcc_cv_ld_clearcap)
6401
6402 case "$target" in
6403   powerpc*-*-*)
6404     case "$target" in
6405       *le-*-linux*)
6406         emul_name="-melf32lppc"
6407         ;;
6408       *)
6409         emul_name="-melf32ppc"
6410         ;;
6411     esac
6412     AC_CACHE_CHECK(linker .gnu.attributes long double support,
6413     gcc_cv_ld_ppc_attr,
6414     [gcc_cv_ld_ppc_attr=no
6415     if test x"$ld_is_gold" = xyes; then
6416       gcc_cv_ld_ppc_attr=yes
6417     elif test $in_tree_ld = yes ; then
6418       if test "$gcc_cv_gld_major_version" -eq 2 \
6419                 -a "$gcc_cv_gld_minor_version" -ge 28 \
6420                 -o "$gcc_cv_gld_major_version" -gt 2; then
6421         gcc_cv_ld_ppc_attr=yes
6422       fi
6423     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
6424       # check that merging the long double .gnu_attribute doesn't warn
6425       cat > conftest1.s <<EOF
6426         .gnu_attribute 4,1
6427 EOF
6428       cat > conftest2.s <<EOF
6429         .gnu_attribute 4,9
6430 EOF
6431       if $gcc_cv_as -a32 -o conftest1.o conftest1.s > /dev/null 2>&1 \
6432          && $gcc_cv_as -a32 -o conftest2.o conftest2.s > /dev/null 2>&1 \
6433          && $gcc_cv_ld $emul_name -r -o conftest.o conftest1.o conftest2.o > /dev/null 2> conftest.err \
6434          && test ! -s conftest.err; then
6435         gcc_cv_ld_ppc_attr=yes
6436       fi
6437       rm -f conftest.err conftest.o conftest1.o conftest2.o conftest1.s conftest2.s
6438     fi
6439     ])
6440     if test x$gcc_cv_ld_ppc_attr = xyes; then
6441       AC_DEFINE(HAVE_LD_PPC_GNU_ATTR_LONG_DOUBLE, 1,
6442     [Define if your PowerPC linker has .gnu.attributes long double support.])
6443     fi
6444     ;;
6445 esac
6446
6447 case "$target:$tm_file" in
6448   powerpc64*-*-freebsd* | powerpc64*-*-linux* | powerpc*-*-linux*rs6000/biarch64.h*)
6449   case "$target" in
6450      *le-*-linux*)
6451      emul_name="-melf64lppc"
6452       ;;
6453      *-*-linux*)
6454      emul_name="-melf64ppc"
6455       ;;
6456      *le-*-freebsd*)
6457      emul_name="-melf64lppc_fbsd"
6458       ;;
6459      *-*-freebsd*)
6460      emul_name="-melf64ppc_fbsd"
6461       ;;
6462   esac
6463     AC_CACHE_CHECK(linker support for omitting dot symbols,
6464     gcc_cv_ld_no_dot_syms,
6465     [gcc_cv_ld_no_dot_syms=no
6466     if test x"$ld_is_gold" = xyes; then
6467       gcc_cv_ld_no_dot_syms=yes
6468     elif test $in_tree_ld = yes ; then
6469       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2; then
6470         gcc_cv_ld_no_dot_syms=yes
6471       fi
6472     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
6473       cat > conftest1.s <<EOF
6474         .text
6475         bl .foo
6476 EOF
6477       cat > conftest2.s <<EOF
6478         .section ".opd","aw"
6479         .align 3
6480         .globl foo
6481         .type foo,@function
6482 foo:
6483         .quad .LEfoo,.TOC.@tocbase,0
6484         .text
6485 .LEfoo:
6486         blr
6487         .size foo,.-.LEfoo
6488 EOF
6489       if $gcc_cv_as -a64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
6490          && $gcc_cv_as -a64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
6491          && $gcc_cv_ld $emul_name -o conftest conftest1.o conftest2.o > /dev/null 2>&1; then
6492         gcc_cv_ld_no_dot_syms=yes
6493       fi
6494       rm -f conftest conftest1.o conftest2.o conftest1.s conftest2.s
6495     fi
6496     ])
6497     if test x"$gcc_cv_ld_no_dot_syms" = xyes; then
6498       AC_DEFINE(HAVE_LD_NO_DOT_SYMS, 1,
6499     [Define if your PowerPC64 linker only needs function descriptor syms.])
6500     fi
6501
6502     AC_CACHE_CHECK(linker large toc support,
6503     gcc_cv_ld_large_toc,
6504     [gcc_cv_ld_large_toc=no
6505     if test x"$ld_is_gold" = xyes; then
6506       gcc_cv_ld_large_toc=yes
6507     elif test $in_tree_ld = yes ; then
6508       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2; then
6509         gcc_cv_ld_large_toc=yes
6510       fi
6511     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
6512       cat > conftest.s <<EOF
6513         .section ".tbss","awT",@nobits
6514         .align 3
6515 ie0:    .space 8
6516         .global _start
6517         .text
6518 _start:
6519         addis 9,13,ie0@got@tprel@ha
6520         ld 9,ie0@got@tprel@l(9)
6521 EOF
6522       if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1 \
6523          && $gcc_cv_ld $emul_name --no-toc-sort -o conftest conftest.o > /dev/null 2>&1; then
6524         gcc_cv_ld_large_toc=yes
6525       fi
6526       rm -f conftest conftest.o conftest.s
6527     fi
6528     ])
6529     if test x"$gcc_cv_ld_large_toc" = xyes; then
6530       AC_DEFINE(HAVE_LD_LARGE_TOC, 1,
6531     [Define if your PowerPC64 linker supports a large TOC.])
6532     fi
6533
6534     AC_CACHE_CHECK(linker toc pointer alignment,
6535     gcc_cv_ld_toc_align,
6536     [if test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_nm != x; then
6537       cat > conftest.s <<EOF
6538         .global _start
6539         .text
6540 _start:
6541         addis 9,2,x@got@ha
6542         .section .data.rel.ro,"aw",@progbits
6543         .p2align 16
6544         .space 32768
6545 x:      .quad .TOC.
6546 EOF
6547       if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1 \
6548          && $gcc_cv_ld $emul_name -z norelro -o conftest conftest.o > /dev/null 2>&1; then
6549         gcc_cv_ld_toc_align=`$gcc_cv_nm conftest | ${AWK} '/\.TOC\./ { match ($0, "0[[[:xdigit:]]]*", a); print strtonum ("0x" substr(a[[0]], length(a[[0]])-3)) }'`
6550       fi
6551       rm -f conftest conftest.o conftest.s
6552     fi
6553     ])
6554     if test -n "$gcc_cv_ld_toc_align" && test $gcc_cv_ld_toc_align -gt 8; then
6555       AC_DEFINE_UNQUOTED(POWERPC64_TOC_POINTER_ALIGNMENT, $gcc_cv_ld_toc_align,
6556     [Define to .TOC. alignment forced by your linker.])
6557     fi
6558     ;;
6559 esac
6560
6561 case "$target" in
6562   *-*-aix*)
6563     AC_CACHE_CHECK(linker large toc support,
6564     gcc_cv_ld_large_toc,
6565     [gcc_cv_ld_large_toc=no
6566     if test x$gcc_cv_as != x ; then
6567       cat > conftest.s <<EOF
6568         .toc
6569 LC..1:
6570         .tc a[[TC]],a[[RW]]
6571         .extern a[[RW]]
6572         .csect .text[[PR]]
6573 .largetoctest:
6574         addis 9,LC..1@u(2)
6575         ld 3,LC..1@l(9)
6576 EOF
6577       if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1; then
6578         gcc_cv_ld_large_toc=yes
6579       fi
6580       rm -f conftest conftest.o conftest.s
6581     fi
6582     ])
6583     if test x"$gcc_cv_ld_large_toc" = xyes; then
6584       AC_DEFINE(HAVE_LD_LARGE_TOC, 1,
6585     [Define if your PowerPC64 linker supports a large TOC.])
6586     fi
6587     ;;
6588 esac
6589
6590 AC_CACHE_CHECK(linker --build-id support,
6591   gcc_cv_ld_buildid,
6592   [gcc_cv_ld_buildid=no
6593   if test $in_tree_ld = yes ; then
6594     if test "$gcc_cv_gld_major_version" -eq 2 -a \
6595        "$gcc_cv_gld_minor_version" -ge 18 -o \
6596        "$gcc_cv_gld_major_version" -gt 2 \
6597        && test $in_tree_ld_is_elf = yes; then
6598       gcc_cv_ld_buildid=yes
6599     fi
6600   elif test x$gcc_cv_ld != x; then
6601     if $gcc_cv_ld --help 2>&1 | grep build-id > /dev/null; then
6602       gcc_cv_ld_buildid=yes
6603     fi
6604   fi])
6605 if test x"$gcc_cv_ld_buildid" = xyes; then
6606   AC_DEFINE(HAVE_LD_BUILDID, 1,
6607   [Define if your linker supports --build-id.])
6608 fi
6609
6610 AC_ARG_ENABLE(linker-build-id,
6611 [AS_HELP_STRING([--enable-linker-build-id],
6612                 [compiler will always pass --build-id to linker])],
6613 [],
6614 enable_linker_build_id=no)
6615
6616 if test x"$enable_linker_build_id" = xyes; then
6617   if test x"$gcc_cv_ld_buildid" = xyes; then
6618     AC_DEFINE(ENABLE_LD_BUILDID, 1,
6619     [Define if gcc should always pass --build-id to linker.])
6620   else
6621     AC_MSG_WARN(--build-id is not supported by your linker; --enable-linker-build-id ignored)
6622   fi
6623 fi
6624
6625 # In binutils 2.21, GNU ld gained support for new emulations fully
6626 # supporting the Solaris 2 ABI.  Detect their presence in the linker used.
6627 AC_CACHE_CHECK(linker *_sol2 emulation support,
6628   gcc_cv_ld_sol2_emulation,
6629   [gcc_cv_ld_sol2_emulation=no
6630   if test $in_tree_ld = yes ; then
6631     if test "$gcc_cv_gld_major_version" -eq 2 -a \
6632        "$gcc_cv_gld_minor_version" -ge 21 -o \
6633        "$gcc_cv_gld_major_version" -gt 2 \
6634        && test $in_tree_ld_is_elf = yes; then
6635       gcc_cv_ld_sol2_emulation=yes
6636     fi
6637   elif test x$gcc_cv_ld != x; then
6638     if $gcc_cv_ld -V 2>/dev/null | sed -e '1,/Supported emulations/d;q' | \
6639        grep _sol2 > /dev/null; then
6640       gcc_cv_ld_sol2_emulation=yes
6641     fi
6642   fi])
6643 if test x"$gcc_cv_ld_sol2_emulation" = xyes; then
6644   AC_DEFINE(HAVE_LD_SOL2_EMULATION, 1,
6645   [Define if your linker supports the *_sol2 emulations.])
6646 fi
6647
6648 AC_CACHE_CHECK(linker --sysroot support,
6649   gcc_cv_ld_sysroot,
6650   [gcc_cv_ld_sysroot=no
6651   if test $in_tree_ld = yes ; then
6652       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 ; then
6653         gcc_cv_ld_sysroot=yes
6654       fi
6655   elif test x$gcc_cv_ld != x; then
6656     if $gcc_cv_ld --help 2>&1 | grep sysroot > /dev/null; then
6657       gcc_cv_ld_sysroot=yes
6658     fi
6659   fi])
6660 if test x"$gcc_cv_ld_sysroot" = xyes; then
6661   AC_DEFINE(HAVE_LD_SYSROOT, 1,
6662   [Define if your linker supports --sysroot.])
6663 fi
6664
6665 case $target in
6666 *-*-solaris2*)
6667   # Check for system-provided CRTs on Solaris 11.x and Solaris 12.
6668   AC_CACHE_CHECK([system-provided CRTs on Solaris],
6669     gcc_cv_solaris_crts,
6670     [gcc_cv_solaris_crts=no
6671      if test x$host != x$target; then
6672        if test "x$with_sysroot" = xyes; then
6673          target_sysroot="${test_exec_prefix}/${target_noncanonical}/sys-root"
6674        else
6675          target_sysroot="${with_sysroot}"
6676        fi
6677      fi
6678      target_libdir="$target_sysroot/usr/lib"
6679      # At the time they were added, gcrt1.o became a symlink for backwards
6680      # compatibility on x86, while crt1.o was added on sparc, so check for that.
6681      case $target in
6682        i?86-*-solaris2* | x86_64-*-solaris2*)
6683          if test -h "$target_libdir/gcrt1.o"; then gcc_cv_solaris_crts=yes; fi
6684          ;;
6685        sparc*-*-solaris2*)
6686          if test -f "$target_libdir/crt1.o"; then gcc_cv_solaris_crts=yes; fi
6687          ;;
6688      esac])
6689   ;;
6690 esac
6691 if test x$gcc_cv_solaris_crts = xyes; then
6692   AC_DEFINE(HAVE_SOLARIS_CRTS, 1,
6693             [Define if the system-provided CRTs are present on Solaris.])
6694 fi
6695
6696 AC_ARG_ENABLE(libssp,
6697 [AS_HELP_STRING([--enable-libssp], [enable linking against libssp])],
6698 [case "${enableval}" in
6699   yes|no)
6700     ;;
6701   *)
6702     AC_MSG_ERROR([unknown libssp setting $enableval])
6703     ;;
6704 esac], [])
6705
6706 # Test for stack protector support in target C library.
6707 AC_CACHE_CHECK(__stack_chk_fail in target C library,
6708   gcc_cv_libc_provides_ssp,
6709   [gcc_cv_libc_provides_ssp=no
6710   if test "x$enable_libssp" = "xno"; then
6711     gcc_cv_libc_provides_ssp=yes
6712   elif test "x$enable_libssp" = "xyes"; then
6713     gcc_cv_libc_provides_ssp=no
6714   else
6715     case "$target" in
6716        *-*-musl*)
6717          # All versions of musl provide stack protector
6718          gcc_cv_libc_provides_ssp=yes;;
6719        *-*-linux* | *-*-kfreebsd*-gnu)
6720       # glibc 2.4 and later provides __stack_chk_fail and
6721       # either __stack_chk_guard, or TLS access to stack guard canary.
6722       GCC_GLIBC_VERSION_GTE_IFELSE([2], [4], [gcc_cv_libc_provides_ssp=yes], [
6723       [if test -f $target_header_dir/features.h \
6724          && $EGREP '^[  ]*#[    ]*define[       ]+__GNU_LIBRARY__[      ]+([1-9][0-9]|[6-9])' \
6725             $target_header_dir/features.h > /dev/null; then
6726         if $EGREP '^[   ]*#[    ]*define[       ]+__UCLIBC__[   ]+1' \
6727              $target_header_dir/features.h > /dev/null && \
6728              test -f $target_header_dir/bits/uClibc_config.h && \
6729              $EGREP '^[         ]*#[    ]*define[       ]+__UCLIBC_HAS_SSP__[   ]+1' \
6730              $target_header_dir/bits/uClibc_config.h > /dev/null; then
6731           gcc_cv_libc_provides_ssp=yes
6732         fi
6733       # all versions of Bionic support stack protector
6734       elif test -f $target_header_dir/sys/cdefs.h \
6735         && $EGREP '^[  ]*#[    ]*define[       ]+__BIONIC__[   ]+1' \
6736            $target_header_dir/sys/cdefs.h > /dev/null; then
6737          gcc_cv_libc_provides_ssp=yes
6738       fi]])
6739         ;;
6740        *-*-gnu*)
6741          # Avoid complicated tests (see
6742          # <http://gcc.gnu.org/ml/gcc/2008-10/msg00130.html>) and for now
6743          # simply assert that glibc does provide this, which is true for all
6744          # realistically usable GNU/Hurd configurations.
6745          # All supported versions of musl provide it as well
6746          gcc_cv_libc_provides_ssp=yes;;
6747        *-*-darwin* | *-*-freebsd* | *-*-netbsd*)
6748          AC_CHECK_FUNC(__stack_chk_fail,[gcc_cv_libc_provides_ssp=yes],
6749            [echo "no __stack_chk_fail on this target"])
6750         ;;
6751        *) gcc_cv_libc_provides_ssp=no ;;
6752     esac
6753   fi])
6754
6755 if test x$gcc_cv_libc_provides_ssp = xyes; then
6756   AC_DEFINE(TARGET_LIBC_PROVIDES_SSP, 1,
6757             [Define if your target C library provides stack protector support])
6758 fi
6759
6760 # Check whether --enable-default-ssp was given.
6761 AC_ARG_ENABLE(default-ssp,
6762 [AS_HELP_STRING([--enable-default-ssp],
6763   [enable Stack Smashing Protection as default])],[
6764 if test x$gcc_cv_libc_provides_ssp = xyes; then
6765   case "$target" in
6766     ia64*-*-*) enable_default_ssp=no ;;
6767     *) enable_default_ssp=$enableval ;;
6768   esac
6769 else
6770   enable_default_ssp=no
6771 fi],
6772 enable_default_ssp=no)
6773 if test x$enable_default_ssp = xyes ; then
6774   AC_DEFINE(ENABLE_DEFAULT_SSP, 1,
6775       [Define if your target supports default stack protector and it is enabled.])
6776 fi
6777 AC_SUBST([enable_default_ssp])
6778
6779 # Test for <sys/sdt.h> on the target.
6780 GCC_TARGET_TEMPLATE([HAVE_SYS_SDT_H])
6781 AC_MSG_CHECKING(sys/sdt.h in the target C library)
6782 have_sys_sdt_h=no
6783 if test -f $target_header_dir/sys/sdt.h; then
6784   have_sys_sdt_h=yes
6785   AC_DEFINE(HAVE_SYS_SDT_H, 1,
6786             [Define if your target C library provides sys/sdt.h])
6787 fi
6788 AC_MSG_RESULT($have_sys_sdt_h)
6789
6790 # Check if TFmode long double should be used by default or not.
6791 # Some glibc targets used DFmode long double, but with glibc 2.4
6792 # and later they can use TFmode.
6793 case "$target" in
6794   powerpc*-*-linux* | \
6795   sparc*-*-linux* | \
6796   s390*-*-linux* | \
6797   alpha*-*-linux*)
6798     AC_ARG_WITH(long-double-128,
6799       [AS_HELP_STRING([--with-long-double-128],
6800                       [use 128-bit long double by default])],
6801       gcc_cv_target_ldbl128="$with_long_double_128", [
6802       case "$target" in
6803         s390*-*-linux-musl*)
6804           gcc_cv_target_ldbl128=yes
6805           ;;
6806         powerpc*-*-linux-musl*)
6807           gcc_cv_target_ldbl128=no
6808           ;;
6809         *)]
6810       [GCC_GLIBC_VERSION_GTE_IFELSE([2], [4], [gcc_cv_target_ldbl128=yes], [
6811       [gcc_cv_target_ldbl128=no
6812       grep '^[  ]*#[    ]*define[       ][      ]*__LONG_DOUBLE_MATH_OPTIONAL' \
6813         $target_header_dir/bits/wordsize.h > /dev/null 2>&1 \
6814       && gcc_cv_target_ldbl128=yes
6815       ]])]
6816       [
6817           ;;
6818       esac
6819       ])
6820     ;;
6821 esac
6822 if test x$gcc_cv_target_ldbl128 = xyes; then
6823   AC_DEFINE(TARGET_DEFAULT_LONG_DOUBLE_128, 1,
6824             [Define if TFmode long double should be the default])
6825 fi
6826
6827 # Check if TFmode long double target should use the IBM extended double or IEEE
6828 # 128-bit floating point formats if long doubles are 128-bits long.  The long
6829 # double type can only be switched on powerpc64 bit Linux systems where VSX is
6830 # supported.  Other PowerPC systems do not build the IEEE 128-bit emulator in
6831 # libgcc.
6832 AC_ARG_WITH([long-double-format],
6833   [AS_HELP_STRING([--with-long-double-format={ieee,ibm}]
6834                   [Specify whether PowerPC long double uses IEEE or IBM format])],[
6835 case "$target:$with_long_double_format" in
6836   powerpc64le-*-linux*:ieee | powerpc64le-*-linux*:ibm)
6837     :
6838     ;;
6839   powerpc64-*-linux*:ieee | powerpc64-*-linux*:ibm)
6840     # IEEE 128-bit emulation is only built on 64-bit VSX Linux systems
6841     case "$with_cpu" in
6842       power7 | power8 | power9 | power1*)
6843         :
6844         ;;
6845       *)
6846         AC_MSG_ERROR([Configuration option --with-long-double-format is only \
6847 supported if the default cpu is power7 or newer])
6848         with_long_double_format=""
6849         ;;
6850       esac
6851       ;;
6852   powerpc64*-*-linux*:*)
6853     AC_MSG_ERROR([--with-long-double-format argument should be ibm or ieee])
6854     with_long_double_format=""
6855     ;;
6856   *)
6857     AC_MSG_ERROR([Configure option --with-long-double-format is only supported \
6858 on 64-bit PowerPC VSX Linux systems])
6859     with_long_double_format=""
6860     ;;
6861 esac],
6862   [])
6863
6864 # Check if the target LIBC supports exporting the AT_PLATFORM and AT_HWCAP
6865 # values in the TCB.  Currently, only GLIBC 2.23 and later support this.
6866 gcc_cv_libc_provides_hwcap_in_tcb=no
6867 case "$target" in
6868   powerpc*-*-linux*)
6869     GCC_GLIBC_VERSION_GTE_IFELSE([2], [23], [gcc_cv_libc_provides_hwcap_in_tcb=yes], )
6870     ;;
6871 esac
6872 if test x$gcc_cv_libc_provides_hwcap_in_tcb = xyes; then
6873   AC_DEFINE(TARGET_LIBC_PROVIDES_HWCAP_IN_TCB, 1,
6874             [Define if your target C Library provides the AT_HWCAP value in the TCB])
6875 fi
6876
6877 # Check if the target LIBC handles PT_GNU_STACK.
6878 gcc_cv_libc_gnustack=unknown
6879 case "$target" in
6880   mips*-*-linux-musl*)
6881     gcc_cv_libc_gnustack=yes
6882     ;;
6883   mips*-*-linux*)
6884     GCC_GLIBC_VERSION_GTE_IFELSE([2], [31], [gcc_cv_libc_gnustack=yes], )
6885     ;;
6886 esac
6887 if test x$gcc_cv_libc_gnustack = xyes; then
6888   AC_DEFINE(TARGET_LIBC_GNUSTACK, 1,
6889             [Define if your target C Library properly handles PT_GNU_STACK])
6890 fi
6891
6892 AC_MSG_CHECKING(dl_iterate_phdr in target C library)
6893 gcc_cv_target_dl_iterate_phdr=unknown
6894 case "$target" in
6895   *-*-solaris2*)
6896     # <link.h> needs both a dl_iterate_phdr declaration and support for
6897     # compilation with largefile support.
6898     if grep dl_iterate_phdr $target_header_dir/link.h > /dev/null 2>&1 \
6899       && grep 'large file capable' $target_header_dir/link.h > /dev/null 2>&1; then
6900       gcc_cv_target_dl_iterate_phdr=yes
6901     else
6902       gcc_cv_target_dl_iterate_phdr=no
6903     fi
6904     ;;
6905   *-*-dragonfly* | *-*-freebsd*)
6906     if grep dl_iterate_phdr $target_header_dir/sys/link_elf.h > /dev/null 2>&1; then
6907       gcc_cv_target_dl_iterate_phdr=yes
6908     else
6909       gcc_cv_target_dl_iterate_phdr=no
6910     fi
6911     ;;
6912   *-linux-musl*)
6913     gcc_cv_target_dl_iterate_phdr=yes
6914     ;;
6915 esac
6916 GCC_TARGET_TEMPLATE([TARGET_DL_ITERATE_PHDR])
6917 if test x$gcc_cv_target_dl_iterate_phdr = xyes; then
6918    AC_DEFINE(TARGET_DL_ITERATE_PHDR, 1,
6919 [Define if your target C library provides the `dl_iterate_phdr' function.])
6920 fi
6921 AC_MSG_RESULT($gcc_cv_target_dl_iterate_phdr)
6922
6923 # We no longer support different GC mechanisms.  Emit an error if
6924 # the user configures with --with-gc.
6925 AC_ARG_WITH(gc,
6926 [AS_HELP_STRING([--with-gc={page,zone}],
6927                 [this option is not supported anymore.  It used to choose
6928                  the garbage collection mechanism to use with the compiler])],
6929 [AC_MSG_ERROR([Configure option --with-gc is only supported up to GCC 4.7.x])],
6930 [])
6931
6932 # Libraries to use on the host.  This will normally be set by the top
6933 # level Makefile.  Here we simply capture the value for our Makefile.
6934 if test -z "${HOST_LIBS+set}"; then
6935   HOST_LIBS=
6936 fi
6937 AC_SUBST(HOST_LIBS)
6938
6939 # Use the system's zlib library.
6940 AM_ZLIB
6941
6942 dnl Very limited version of automake's enable-maintainer-mode
6943
6944 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
6945   dnl maintainer-mode is disabled by default
6946   AC_ARG_ENABLE(maintainer-mode,
6947 [AS_HELP_STRING([--enable-maintainer-mode],
6948                 [enable make rules and dependencies not useful
6949                  (and sometimes confusing) to the casual installer])],
6950       maintainer_mode=$enableval,
6951       maintainer_mode=no)
6952
6953 AC_MSG_RESULT($maintainer_mode)
6954
6955 if test "$maintainer_mode" = "yes"; then
6956   MAINT=''
6957 else
6958   MAINT='#'
6959 fi
6960 AC_SUBST(MAINT)dnl
6961
6962 dnl Variables for tags utilities; copied from automake 1.16.4+'s init.m4
6963 if test -z "$CTAGS"; then
6964   CTAGS=ctags
6965 fi
6966 AC_SUBST([CTAGS])
6967 if test -z "$ETAGS"; then
6968   ETAGS=etags
6969 fi
6970 AC_SUBST([ETAGS])
6971 if test -z "$CSCOPE"; then
6972   CSCOPE=cscope
6973 fi
6974 AC_SUBST([CSCOPE])
6975
6976 dnl Whether to prevent multiple front-ends from linking at the same time
6977
6978 AC_MSG_CHECKING([whether to avoid linking multiple front-ends at once])
6979   AC_ARG_ENABLE(link-mutex,
6980 [AS_HELP_STRING([--enable-link-mutex],
6981                 [avoid linking multiple front-ends at once to avoid thrashing
6982                  on the build machine])],
6983       do_link_mutex=$enableval,
6984       do_link_mutex=no)
6985 AC_MSG_RESULT($do_link_mutex)
6986
6987 if test "$do_link_mutex" = "yes"; then
6988    DO_LINK_MUTEX=true
6989 else
6990    DO_LINK_MUTEX=false
6991 fi
6992 AC_SUBST(DO_LINK_MUTEX)
6993
6994 dnl Whether to prevent multiple GCC front-ends from linking at the same time
6995
6996 AC_MSG_CHECKING([whether to serialize linking of multiple front-ends])
6997   AC_ARG_ENABLE(link-serialization,
6998 [AS_HELP_STRING([--enable-link-serialization],
6999                 [avoid linking multiple GCC front-ends at once using make
7000                  dependencies to avoid thrashing on the build machine])],
7001       do_link_serialization=$enableval,
7002       do_link_serialization=no)
7003 AC_MSG_RESULT($do_link_serialization)
7004
7005 case "$do_link_serialization" in
7006   yes)
7007     DO_LINK_SERIALIZATION=1;;
7008   [[1-9]] | [[1-9]][[0-9]] | [[1-9]][[0-9]][[0-9]])
7009     DO_LINK_SERIALIZATION=$do_link_serialization;;
7010   no)
7011     DO_LINK_SERIALIZATION=;;
7012   *)
7013     AC_MSG_ERROR(bad value ${do_link_serialization} given for --enable-link-serialization) ;;
7014 esac
7015 AC_SUBST(DO_LINK_SERIALIZATION)
7016
7017 # --------------
7018 # Language hooks
7019 # --------------
7020
7021 # Make empty files to contain the specs and options for each language.
7022 # Then add #include lines to for a compiler that has specs and/or options.
7023
7024 subdirs=
7025 lang_opt_files=
7026 lang_specs_files=
7027 lang_tree_files=
7028 # These (without "all_") are set in each config-lang.in.
7029 # `language' must be a single word so is spelled singularly.
7030 all_languages=
7031 all_compilers=
7032 all_outputs='Makefile'
7033 # List of language configure and makefile fragments.
7034 all_lang_configurefrags=
7035 all_lang_makefrags=
7036 # Additional files for gengtype
7037 all_gtfiles="$target_gtfiles"
7038
7039 # These are the languages that are set in --enable-languages,
7040 # and are available in the GCC tree.
7041 all_selected_languages=
7042
7043 # Add the language fragments.
7044 # Languages are added via two mechanisms.  Some information must be
7045 # recorded in makefile variables, these are defined in config-lang.in.
7046 # We accumulate them and plug them into the main Makefile.
7047 # The other mechanism is a set of hooks for each of the main targets
7048 # like `clean', `install', etc.
7049
7050 language_hooks="Make-hooks"
7051
7052 for lang in ${srcdir}/*/config-lang.in
7053 do
7054 changequote(,)dnl
7055         test "$lang" = "${srcdir}/*/config-lang.in" && continue
7056
7057         lang_alias=`sed -n -e 's,^language=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^language=\([^   ]*\).*$,\1,p' $lang`
7058         if test "x$lang_alias" = x
7059         then
7060               echo "$lang doesn't set \$language." 1>&2
7061               exit 1
7062         fi
7063         subdir="`echo $lang | sed -e 's,^.*/\([^/]*\)/config-lang.in$,\1,'`"
7064         subdirs="$subdirs $subdir"
7065
7066         # $gcc_subdir is where the gcc integration files are to be found
7067         # for a language, both for internal compiler purposes (compiler
7068         # sources implementing front-end to GCC tree converters), and for
7069         # build infrastructure purposes (Make-lang.in, etc.)
7070         #
7071         # This will be <subdir> (relative to $srcdir) if a line like
7072         # gcc_subdir="<subdir>" or gcc_subdir=<subdir>
7073         # is found in <langdir>/config-lang.in, and will remain <langdir>
7074         # otherwise.
7075         #
7076         # Except for the language alias (fetched above), the regular
7077         # "config-lang.in" contents are always retrieved from $gcc_subdir,
7078         # so a <langdir>/config-lang.in setting gcc_subdir typically sets
7079         # only this and the language alias.
7080
7081         gcc_subdir=`sed -n -e 's,^gcc_subdir=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^gcc_subdir=\([^   ]*\).*$,\1,p' $lang`
7082         if [ "$gcc_subdir" = "" ]; then
7083            gcc_subdir="$subdir"
7084         fi
7085
7086         case ",$enable_languages," in
7087         *,$lang_alias,*)
7088             all_selected_languages="$all_selected_languages $lang_alias"
7089             if test -f $srcdir/$gcc_subdir/lang-specs.h; then
7090                 lang_specs_files="$lang_specs_files $srcdir/$gcc_subdir/lang-specs.h"
7091             fi
7092             ;;
7093         esac
7094 changequote([,])dnl
7095
7096         language=
7097         boot_language=
7098         compilers=
7099         outputs=
7100         gtfiles=
7101         subdir_requires=
7102         . ${srcdir}/$gcc_subdir/config-lang.in
7103         if test "x$language" = x
7104         then
7105                 echo "${srcdir}/$gcc_subdir/config-lang.in doesn't set \$language." 1>&2
7106                 exit 1
7107         fi
7108
7109         ok=:
7110         case ",$enable_languages," in
7111                 *,$lang_alias,*) ;;
7112                 *)
7113                         for i in $subdir_requires; do
7114                                 test -f "${srcdir}/$i/config-lang.in" && continue
7115                                 ok=false
7116                                 break
7117                         done
7118                 ;;
7119         esac
7120         $ok || continue
7121
7122         all_lang_configurefrags="$all_lang_configurefrags \$(srcdir)/$gcc_subdir/config-lang.in"
7123         if test "x$language" = xc && test -n "$all_lang_makefrags"; then
7124             # Put c/Make-lang.in fragment first to match serialization languages order.
7125             all_lang_makefrags="\$(srcdir)/$gcc_subdir/Make-lang.in $all_lang_makefrags"
7126         else
7127             all_lang_makefrags="$all_lang_makefrags \$(srcdir)/$gcc_subdir/Make-lang.in"
7128         fi
7129         if test -f $srcdir/$gcc_subdir/lang.opt; then
7130             lang_opt_files="$lang_opt_files $srcdir/$gcc_subdir/lang.opt"
7131             all_opt_files="$all_opt_files $srcdir/$gcc_subdir/lang.opt"
7132         fi
7133         if test -f $srcdir/$gcc_subdir/$subdir-tree.def; then
7134             lang_tree_files="$lang_tree_files $srcdir/$gcc_subdir/$subdir-tree.def"
7135         fi
7136         all_languages="$all_languages $language"
7137         all_compilers="$all_compilers $compilers"
7138         all_outputs="$all_outputs $outputs"
7139         all_gtfiles="$all_gtfiles [[$subdir]] $gtfiles"
7140         case ",$enable_languages," in
7141                 *,lto,*)
7142                     AC_DEFINE(ENABLE_LTO, 1, [Define to enable LTO support.])
7143                     enable_lto=yes
7144                     AC_SUBST(enable_lto)
7145                     ;;
7146                 *) ;;
7147         esac
7148 done
7149
7150 check_languages=
7151 for language in $all_selected_languages
7152 do
7153         check_languages="$check_languages check-$language"
7154 done
7155
7156 selftest_languages=
7157 for language in $all_selected_languages
7158 do
7159         selftest_languages="$selftest_languages selftest-$language"
7160 done
7161
7162 # We link each language in with a set of hooks, reached indirectly via
7163 # lang.${target}.  Only do so for selected languages.
7164
7165 rm -f Make-hooks
7166 touch Make-hooks
7167 target_list="all.cross start.encap rest.encap tags \
7168         install-common install-man install-info install-dvi install-pdf \
7169         install-html dvi pdf html uninstall info man srcextra srcman srcinfo \
7170         mostlyclean clean distclean maintainer-clean install-plugin"
7171
7172 for t in $target_list
7173 do
7174         x=
7175         for lang in $all_selected_languages
7176         do
7177                 x="$x $lang.$t"
7178         done
7179         echo "lang.$t: $x" >> Make-hooks
7180 done
7181
7182 echo "ifeq (\$(DO_LINK_SERIALIZATION),)" >> Make-hooks
7183 echo "SERIAL_LIST =" >> Make-hooks
7184 echo else >> Make-hooks
7185 lang_cnt=0
7186 lang_list=
7187 prev=c
7188 serialization_languages=c
7189 for lang in $all_selected_languages
7190 do
7191         test $lang = c && continue
7192         if test $lang = lto; then
7193                 serialization_languages="$serialization_languages lto1 lto2"
7194         else
7195                 serialization_languages="$serialization_languages $lang"
7196         fi
7197 done
7198 for lang in $serialization_languages
7199 do
7200         test $lang = c && continue
7201         lang_cnt=`expr $lang_cnt + 1`
7202         lang_list=" $prev$lang_list"
7203         prev=${lang}
7204 done
7205 echo "SERIAL_LIST = \$(wordlist \$(DO_LINK_SERIALIZATION),$lang_cnt,$lang_list)" >> Make-hooks
7206 echo endif >> Make-hooks
7207 echo "SERIAL_COUNT = `expr $lang_cnt + 1`" >> Make-hooks
7208 echo "INDEX.c = 0" >> Make-hooks
7209 lang_idx=1
7210 for lang in $serialization_languages
7211 do
7212         test $lang = c && continue
7213         echo "$lang.prev = \$(if \$(word $lang_cnt,\$(SERIAL_LIST)),\$(\$(word $lang_cnt,\$(SERIAL_LIST)).serial))" >> Make-hooks
7214         echo "INDEX.$lang = $lang_idx" >> Make-hooks
7215         lang_cnt=`expr $lang_cnt - 1`
7216         lang_idx=`expr $lang_idx + 1`
7217 done
7218
7219 # --------
7220 # Option include files
7221 # --------
7222
7223 ${AWK} -f $srcdir/opt-include.awk $all_opt_files > option-includes.mk
7224 option_includes="option-includes.mk"
7225 AC_SUBST_FILE(option_includes)
7226
7227 # --------
7228 # UNSORTED
7229 # --------
7230
7231 # Create .gdbinit.
7232
7233 echo "dir ." > .gdbinit
7234 echo "dir ${srcdir}" >> .gdbinit
7235 if test x$gdb_needs_out_file_path = xyes
7236 then
7237         echo "dir ${srcdir}/config/"`dirname ${out_file}` >> .gdbinit
7238 fi
7239 if test "x$subdirs" != x; then
7240         for s in $subdirs
7241         do
7242                 echo "dir ${srcdir}/$s" >> .gdbinit
7243         done
7244 fi
7245 echo "source ${srcdir}/gdbinit.in" >> .gdbinit
7246 echo "python import sys; sys.path.append('${srcdir}'); import gdbhooks" >> .gdbinit
7247
7248 # Put a breakpoint on __asan_report_error to help with debugging buffer
7249 # overflow.
7250 case "$CFLAGS" in
7251 *-fsanitize=address*)
7252   echo "source ${srcdir}/gdbasan.in" >> .gdbinit
7253   ;;
7254 esac
7255
7256 gcc_tooldir='$(libsubdir)/$(libsubdir_to_prefix)$(target_noncanonical)'
7257 AC_SUBST(gcc_tooldir)
7258 AC_SUBST(dollar)
7259
7260 # Find a directory in which to install a shared libgcc.
7261
7262 AC_ARG_ENABLE(version-specific-runtime-libs,
7263 [AS_HELP_STRING([--enable-version-specific-runtime-libs],
7264                 [specify that runtime libraries should be
7265                  installed in a compiler-specific directory])])
7266
7267 # Substitute configuration variables
7268 AC_SUBST(subdirs)
7269 AC_SUBST(srcdir)
7270 AC_SUBST(all_compilers)
7271 AC_SUBST(all_gtfiles)
7272 AC_SUBST(all_lang_configurefrags)
7273 AC_SUBST(all_lang_makefrags)
7274 AC_SUBST(all_languages)
7275 AC_SUBST(all_selected_languages)
7276 AC_SUBST(build_exeext)
7277 AC_SUBST(build_install_headers_dir)
7278 AC_SUBST(build_xm_file_list)
7279 AC_SUBST(build_xm_include_list)
7280 AC_SUBST(build_xm_defines)
7281 AC_SUBST(build_file_translate)
7282 AC_SUBST(check_languages)
7283 AC_SUBST(selftest_languages)
7284 AC_SUBST(cpp_install_dir)
7285 AC_SUBST(xmake_file)
7286 AC_SUBST(tmake_file)
7287 AC_SUBST(TM_ENDIAN_CONFIG)
7288 AC_SUBST(TM_MULTILIB_CONFIG)
7289 AC_SUBST(TM_MULTILIB_EXCEPTIONS_CONFIG)
7290 AC_SUBST(extra_gcc_objs)
7291 AC_SUBST(user_headers_inc_next_pre)
7292 AC_SUBST(user_headers_inc_next_post)
7293 AC_SUBST(extra_headers_list)
7294 AC_SUBST(extra_objs)
7295 AC_SUBST(extra_programs)
7296 AC_SUBST(float_h_file)
7297 AC_SUBST(gcc_config_arguments)
7298 AC_SUBST(gcc_gxx_include_dir)
7299 AC_SUBST(gcc_gxx_include_dir_add_sysroot)
7300 AC_SUBST(gcc_gxx_libcxx_include_dir)
7301 AC_SUBST(gcc_gxx_libcxx_include_dir_add_sysroot)
7302 AC_SUBST(host_exeext)
7303 AC_SUBST(host_xm_file_list)
7304 AC_SUBST(host_xm_include_list)
7305 AC_SUBST(host_xm_defines)
7306 AC_SUBST(out_host_hook_obj)
7307 AC_SUBST(install)
7308 AC_SUBST(lang_opt_files)
7309 AC_SUBST(lang_specs_files)
7310 AC_SUBST(lang_tree_files)
7311 AC_SUBST(local_prefix)
7312 AC_SUBST(md_file)
7313 AC_SUBST(objc_boehm_gc)
7314 AC_SUBST(out_file)
7315 AC_SUBST(out_object_file)
7316 AC_SUBST(common_out_file)
7317 AC_SUBST(common_out_object_file)
7318 AC_SUBST(tm_file_list)
7319 AC_SUBST(tm_include_list)
7320 AC_SUBST(tm_defines)
7321 AC_SUBST(tm_p_file_list)
7322 AC_SUBST(tm_p_include_list)
7323 AC_SUBST(tm_d_file_list)
7324 AC_SUBST(tm_d_include_list)
7325 AC_SUBST(xm_file_list)
7326 AC_SUBST(xm_include_list)
7327 AC_SUBST(xm_defines)
7328 AC_SUBST(use_gcc_stdint)
7329 AC_SUBST(c_target_objs)
7330 AC_SUBST(cxx_target_objs)
7331 AC_SUBST(fortran_target_objs)
7332 AC_SUBST(d_target_objs)
7333 AC_SUBST(target_cpu_default)
7334
7335 AC_SUBST_FILE(language_hooks)
7336
7337 # Echo link setup.
7338 if test x${build} = x${host} ; then
7339   if test x${host} = x${target} ; then
7340     echo "Links are now set up to build a native compiler for ${target}." 1>&2
7341   else
7342     echo "Links are now set up to build a cross-compiler" 1>&2
7343     echo " from ${host} to ${target}." 1>&2
7344   fi
7345 else
7346   if test x${host} = x${target} ; then
7347     echo "Links are now set up to build (on ${build}) a native compiler" 1>&2
7348     echo " for ${target}." 1>&2
7349   else
7350     echo "Links are now set up to build (on ${build}) a cross-compiler" 1>&2
7351     echo " from ${host} to ${target}." 1>&2
7352   fi
7353 fi
7354
7355 AC_ARG_VAR(GMPLIBS,[How to link GMP])
7356 AC_ARG_VAR(GMPINC,[How to find GMP include files])
7357
7358 AC_ARG_VAR(ISLLIBS,[How to link isl])
7359 AC_ARG_VAR(ISLINC,[How to find isl include files])
7360 if test "x${ISLLIBS}" != "x" ; then
7361    AC_DEFINE(HAVE_isl, 1, [Define if isl is in use.])
7362 fi
7363
7364 GCC_ENABLE_PLUGINS
7365 AC_SUBST(pluginlibs)
7366 AC_SUBST(enable_plugin)
7367 if test x"$enable_plugin" = x"yes"; then
7368   AC_DEFINE(ENABLE_PLUGIN, 1, [Define to enable plugin support.])
7369 fi
7370
7371
7372 # Enable --enable-host-shared
7373 AC_ARG_ENABLE(host-shared,
7374 [AS_HELP_STRING([--enable-host-shared],
7375                 [build host code as shared libraries])],
7376 [PICFLAG=-fPIC], [PICFLAG=])
7377 AC_SUBST(enable_host_shared)
7378 AC_SUBST(PICFLAG)
7379
7380
7381 AC_ARG_ENABLE(libquadmath-support,
7382 [AS_HELP_STRING([--disable-libquadmath-support],
7383   [disable libquadmath support for Fortran])],
7384 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
7385 ENABLE_LIBQUADMATH_SUPPORT=yes)
7386 if test "${ENABLE_LIBQUADMATH_SUPPORT}" != "no" ; then
7387   AC_DEFINE(ENABLE_LIBQUADMATH_SUPPORT, 1,
7388             [Define to 1 to enable libquadmath support])
7389 fi
7390
7391
7392 # Specify what hash style to use by default.
7393 AC_ARG_WITH([linker-hash-style],
7394 [AC_HELP_STRING([--with-linker-hash-style={sysv,gnu,both}],
7395                 [specify the linker hash style])],
7396 [case x"$withval" in
7397    xsysv)
7398      LINKER_HASH_STYLE=sysv
7399      ;;
7400    xgnu)
7401      LINKER_HASH_STYLE=gnu
7402      ;;
7403    xboth)
7404      LINKER_HASH_STYLE=both
7405      ;;
7406    *)
7407      AC_MSG_ERROR([$withval is an invalid option to --with-linker-hash-style])
7408      ;;
7409  esac],
7410 [LINKER_HASH_STYLE=''])
7411 if test x"${LINKER_HASH_STYLE}" != x; then
7412   AC_DEFINE_UNQUOTED(LINKER_HASH_STYLE, "$LINKER_HASH_STYLE",
7413                                          [The linker hash style])
7414 fi
7415
7416 # Specify what should be the default of -fdiagnostics-color option.
7417 AC_ARG_WITH([diagnostics-color],
7418 [AC_HELP_STRING([--with-diagnostics-color={never,auto,auto-if-env,always}],
7419                 [specify the default of -fdiagnostics-color option
7420                  auto-if-env stands for -fdiagnostics-color=auto if
7421                  GCC_COLOR environment variable is present and
7422                  -fdiagnostics-color=never otherwise])],
7423 [case x"$withval" in
7424    xnever)
7425      DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_NO
7426      ;;
7427    xauto)
7428      DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_AUTO
7429      ;;
7430    xauto-if-env)
7431      DIAGNOSTICS_COLOR_DEFAULT=-1
7432      ;;
7433    xalways)
7434      DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_YES
7435      ;;
7436    *)
7437      AC_MSG_ERROR([$withval is an invalid option to --with-diagnostics-color])
7438      ;;
7439  esac],
7440 [DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_AUTO])
7441 AC_DEFINE_UNQUOTED(DIAGNOSTICS_COLOR_DEFAULT, $DIAGNOSTICS_COLOR_DEFAULT,
7442                    [The default for -fdiagnostics-color option])
7443
7444 # Specify what should be the default of -fdiagnostics-urls option.
7445 AC_ARG_WITH([diagnostics-urls],
7446 [AC_HELP_STRING([--with-diagnostics-urls={never,auto,auto-if-env,always}],
7447                 [specify the default of -fdiagnostics-urls option
7448                  auto-if-env stands for -fdiagnostics-urls=auto if
7449                  GCC_URLS or TERM_URLS environment variable is present and
7450                  -fdiagnostics-urls=never otherwise])],
7451 [case x"$withval" in
7452    xnever)
7453      DIAGNOSTICS_URLS_DEFAULT=DIAGNOSTICS_URL_NO
7454      ;;
7455    xauto)
7456      DIAGNOSTICS_URLS_DEFAULT=DIAGNOSTICS_URL_AUTO
7457      ;;
7458    xauto-if-env)
7459      DIAGNOSTICS_URLS_DEFAULT=-1
7460      ;;
7461    xalways)
7462      DIAGNOSTICS_URLS_DEFAULT=DIAGNOSTICS_URL_YES
7463      ;;
7464    *)
7465      AC_MSG_ERROR([$withval is an invalid option to --with-diagnostics-urls])
7466      ;;
7467  esac],
7468 [DIAGNOSTICS_URLS_DEFAULT=DIAGNOSTICS_URL_AUTO])
7469 AC_DEFINE_UNQUOTED(DIAGNOSTICS_URLS_DEFAULT, $DIAGNOSTICS_URLS_DEFAULT,
7470                    [The default for -fdiagnostics-urls option])
7471
7472 # Generate gcc-driver-name.h containing GCC_DRIVER_NAME for the benefit
7473 # of jit/jit-playback.cc.
7474 gcc_driver_version=`eval "${get_gcc_base_ver} $srcdir/BASE-VER"`
7475 echo "gcc_driver_version: ${gcc_driver_version}"
7476 cat > gcc-driver-name.h <<EOF
7477 #define GCC_DRIVER_NAME "${target_noncanonical}-gcc-${gcc_driver_version}${exeext}"
7478 EOF
7479
7480 # Check whether --enable-default-pie was given.
7481 AC_ARG_ENABLE(default-pie,
7482 [AS_HELP_STRING([--enable-default-pie],
7483   [enable Position Independent Executable as default])],
7484 enable_default_pie=$enableval,
7485 enable_default_pie=no)
7486 if test x$enable_default_pie = xyes ; then
7487   AC_DEFINE(ENABLE_DEFAULT_PIE, 1,
7488       [Define if your target supports default PIE and it is enabled.])
7489 fi
7490 AC_SUBST([enable_default_pie])
7491
7492 # Check if -fno-PIE works.
7493 AC_CACHE_CHECK([for -fno-PIE option],
7494   [gcc_cv_c_no_fpie],
7495   [saved_CXXFLAGS="$CXXFLAGS"
7496    CXXFLAGS="$CXXFLAGS -fno-PIE"
7497    AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) {return 0;}])],
7498      [gcc_cv_c_no_fpie=yes],
7499      [gcc_cv_c_no_fpie=no])
7500    CXXFLAGS="$saved_CXXFLAGS"])
7501 if test "$gcc_cv_c_no_fpie" = "yes"; then
7502   NO_PIE_CFLAGS="-fno-PIE"
7503 fi
7504 AC_SUBST([NO_PIE_CFLAGS])
7505
7506 # Check if -no-pie works.
7507 AC_CACHE_CHECK([for -no-pie option],
7508   [gcc_cv_no_pie],
7509   [saved_LDFLAGS="$LDFLAGS"
7510    LDFLAGS="$LDFLAGS -no-pie"
7511    AC_LINK_IFELSE([AC_LANG_SOURCE([int main(void) {return 0;}])],
7512      [gcc_cv_no_pie=yes],
7513      [gcc_cv_no_pie=no])
7514    LDFLAGS="$saved_LDFLAGS"])
7515 if test "$gcc_cv_no_pie" = "yes"; then
7516   NO_PIE_FLAG="-no-pie"
7517 fi
7518 AC_SUBST([NO_PIE_FLAG])
7519
7520 # Enable Intel CET on Intel CET enabled host if jit is enabled.
7521 GCC_CET_HOST_FLAGS(CET_HOST_FLAGS)
7522 case x$enable_languages in
7523 *jit*)
7524   ;;
7525 *)
7526   CET_HOST_FLAGS=
7527   ;;
7528 esac
7529 AC_SUBST(CET_HOST_FLAGS)
7530
7531 # Check linker supports '-z bndplt'
7532 ld_bndplt_support=no
7533 AC_MSG_CHECKING(linker -z bndplt option)
7534 if test x"$ld_is_gold" = xno; then
7535   if test $in_tree_ld = yes ; then
7536     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 25 -o "$gcc_cv_gld_major_version" -gt 2; then
7537       ld_bndplt_support=yes
7538     fi
7539   elif test x$gcc_cv_ld != x; then
7540     # Check if linker supports -a bndplt option
7541     if $gcc_cv_ld --help 2>&1 | grep -- '-z bndplt' > /dev/null; then
7542       ld_bndplt_support=yes
7543     fi
7544   fi
7545 fi
7546 if test x"$ld_bndplt_support" = xyes; then
7547   AC_DEFINE(HAVE_LD_BNDPLT_SUPPORT, 1,
7548         [Define if your linker supports -z bndplt])
7549 fi
7550 AC_MSG_RESULT($ld_bndplt_support)
7551
7552 # Check linker supports '--push-state'/'--pop-state'
7553 ld_pushpopstate_support=no
7554 AC_MSG_CHECKING(linker --push-state/--pop-state options)
7555 if test x"$ld_is_gold" = xno; then
7556   if test $in_tree_ld = yes ; then
7557     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 25 -o "$gcc_cv_gld_major_version" -gt 2; then
7558       ld_pushpopstate_support=yes
7559     fi
7560   elif test x$gcc_cv_ld != x; then
7561     # Check if linker supports --push-state/--pop-state options
7562     if $gcc_cv_ld --help 2>&1 | grep -- '--push-state' > /dev/null; then
7563       ld_pushpopstate_support=yes
7564     fi
7565   fi
7566 fi
7567 if test x"$ld_pushpopstate_support" = xyes; then
7568   AC_DEFINE(HAVE_LD_PUSHPOPSTATE_SUPPORT, 1,
7569         [Define if your linker supports --push-state/--pop-state])
7570 fi
7571 AC_MSG_RESULT($ld_pushpopstate_support)
7572
7573 # On s390, float_t has historically been statically defined as double for no
7574 # good reason. To comply with the C standard in the light of this definition,
7575 # gcc has evaluated float expressions in double precision when in
7576 # standards-compatible mode or when given -fexcess-precision=standard. To enable
7577 # a smooth transition towards the new model used by most architectures, where
7578 # gcc describes its behavior via the macro __FLT_EVAL_METHOD__ and glibc derives
7579 # float_t from that, this behavior can be configured with
7580 # --enable-s390-excess-float-precision. When given as enabled, that flag selects
7581 # the old model. When omitted, native builds and cross compiles that have target
7582 # libc headers will detect whether libc clamps float_t to double and in that
7583 # case maintain the old model. Otherwise, they will default to the new model.
7584 AC_ARG_ENABLE(s390-excess-float-precision,
7585   [AS_HELP_STRING([--enable-s390-excess-float-precision],
7586                   [on s390 targets, evaluate float with double precision
7587                    when in standards-conforming mode])],
7588   [],[enable_s390_excess_float_precision=auto])
7589
7590 case $target in
7591   s390*-linux*)
7592   if test x"$enable_s390_excess_float_precision" = xauto; then
7593     # Can we autodetect the behavior of the target libc?
7594     if test "$target" = "$host" -a "$host" = "$build"; then
7595       enable_s390_excess_float_precision=autodetect
7596     elif test "x$with_headers" != xno; then
7597       # cross build. are target headers available?
7598       # carefully coerce the build-system compiler to use target headers
7599       saved_CXXFLAGS="$CXXFLAGS"
7600       fixed_XGCC_FLAGS_FOR_TARGET=`echo "$XGCC_FLAGS_FOR_TARGET" | sed 's/-B/-idirafter/g'`
7601       CROSS_TEST_CXXFLAGS="-nostdinc $fixed_XGCC_FLAGS_FOR_TARGET"
7602       CXXFLAGS="$CROSS_TEST_CXXFLAGS"
7603       AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
7604 #include <math.h>
7605 ]])], [enable_s390_excess_float_precision=autodetect], [])
7606       CXXFLAGS="$saved_CXXFLAGS"
7607     fi
7608
7609     if test x"$enable_s390_excess_float_precision" = xautodetect; then
7610       saved_CXXFLAGS="$CXXFLAGS"
7611       if ! test "$target" = "$host" -a "$host" = "$build"; then
7612         CXXFLAGS="$CROSS_TEST_CXXFLAGS"
7613         unset CROSS_TEST_CXXFLAGS
7614       fi
7615       AC_CACHE_CHECK([for glibc clamping float_t to double],
7616         gcc_cv_float_t_clamped_to_double, [
7617         AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
7618 #define __FLT_EVAL_METHOD__ 0
7619 #include <math.h>
7620 int dummy[sizeof(float_t) == sizeof(double) ? 1 : -1];
7621 ]])],
7622           [gcc_cv_float_t_clamped_to_double=yes],
7623           [gcc_cv_float_t_clamped_to_double=no])])
7624       CXXFLAGS="$saved_CXXFLAGS"
7625       enable_s390_excess_float_precision="$gcc_cv_float_t_clamped_to_double"
7626     else
7627       # no way to detect behavior of target libc, default to new model
7628       enable_s390_excess_float_precision=no
7629     fi
7630   fi
7631
7632   GCC_TARGET_TEMPLATE(ENABLE_S390_EXCESS_FLOAT_PRECISION)
7633   if test x"$enable_s390_excess_float_precision" = xyes; then
7634     AC_DEFINE(ENABLE_S390_EXCESS_FLOAT_PRECISION, 1,
7635 [Define to enable evaluating float expressions with double precision in
7636 standards-compatible mode on s390 targets.])
7637   fi
7638   ;;
7639 esac
7640
7641 # Configure the subdirectories
7642 # AC_CONFIG_SUBDIRS($subdirs)
7643
7644 # Create the Makefile
7645 # and configure language subdirectories
7646 AC_CONFIG_FILES($all_outputs)
7647
7648 AC_CONFIG_COMMANDS([default],
7649 [
7650 case ${CONFIG_HEADERS} in
7651   *auto-host.h:config.in*)
7652   echo > cstamp-h ;;
7653 esac
7654 # Make sure all the subdirs exist.
7655 for d in $subdirs doc build common c-family
7656 do
7657     test -d $d || mkdir $d
7658 done
7659 ],
7660 [subdirs='$subdirs'])
7661 AC_OUTPUT
7662