gcc/configure.ac

   1 # configure.ac for GCC
   2 # Process this file with autoconf to generate a configuration script.
   3
   4 # Copyright (C) 1997-2018 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_PREREQ(2.64)
  27 AC_INIT
  28 AC_CONFIG_SRCDIR(tree.c)
  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 AC_ARG_WITH(cpp_install_dir,
 233 [AC_HELP_STRING([--with-cpp-install-dir=DIR],
 234                 [install the user visible C preprocessor in DIR
 235                  (relative to PREFIX) as well as PREFIX/bin])],
 236 [if test x$withval = xyes; then
 237   AC_MSG_ERROR([option --with-cpp-install-dir requires an argument])
 238 elif test x$withval != xno; then
 239   cpp_install_dir=$withval
 240 fi])
 241
 242 # We would like to our source tree to be readonly.  However when releases or
 243 # pre-releases are generated, the flex/bison generated files as well as the
 244 # various formats of manuals need to be included along with the rest of the
 245 # sources.  Therefore we have --enable-generated-files-in-srcdir to do
 246 # just that.
 247
 248 AC_MSG_CHECKING([whether to place generated files in the source directory])
 249   dnl generated-files-in-srcdir is disabled by default
 250   AC_ARG_ENABLE(generated-files-in-srcdir,
 251     [AS_HELP_STRING([--enable-generated-files-in-srcdir],
 252                     [put copies of generated files in source dir
 253                      intended for creating source tarballs for users
 254                      without texinfo bison or flex])],
 255       generated_files_in_srcdir=$enableval,
 256       generated_files_in_srcdir=no)
 257
 258 AC_MSG_RESULT($generated_files_in_srcdir)
 259
 260 if test "$generated_files_in_srcdir" = "yes"; then
 261   GENINSRC=''
 262 else
 263   GENINSRC='#'
 264 fi
 265 AC_SUBST(GENINSRC)
 266
 267 # -------------------
 268 # Find default linker
 269 # -------------------
 270
 271 # With GNU ld
 272 AC_ARG_WITH(gnu-ld,
 273 [AS_HELP_STRING([--with-gnu-ld], [arrange to work with GNU ld])],
 274 gnu_ld_flag="$with_gnu_ld",
 275 gnu_ld_flag=no)
 276
 277 case $target in
 278     *darwin*) ld64_flag=yes;; # Darwin can only use a ld64-compatible linker.
 279     *) ld64_flag=no;;
 280 esac
 281
 282 # With pre-defined ld
 283 AC_ARG_WITH(ld,
 284 [AS_HELP_STRING([--with-ld], [arrange to use the specified ld (full pathname)])],
 285 DEFAULT_LINKER="$with_ld")
 286 if test x"${DEFAULT_LINKER+set}" = x"set"; then
 287   if test ! -x "$DEFAULT_LINKER"; then
 288     AC_MSG_ERROR([cannot execute: $DEFAULT_LINKER: check --with-ld or env. var. DEFAULT_LINKER])
 289   elif $DEFAULT_LINKER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
 290     gnu_ld_flag=yes
 291   elif $DEFAULT_LINKER -v < /dev/null 2>&1 | grep ld64- > /dev/null; then
 292     ld64_flag=yes
 293   fi
 294   AC_DEFINE_UNQUOTED(DEFAULT_LINKER,"$DEFAULT_LINKER",
 295         [Define to enable the use of a default linker.])
 296 fi
 297
 298 AC_MSG_CHECKING([whether a default linker was specified])
 299 if test x"${DEFAULT_LINKER+set}" = x"set"; then
 300   if test x"$gnu_ld_flag" = x"no"; then
 301     AC_MSG_RESULT([yes ($DEFAULT_LINKER)])
 302   else
 303     AC_MSG_RESULT([yes ($DEFAULT_LINKER - GNU ld)])
 304   fi
 305 else
 306   AC_MSG_RESULT(no)
 307 fi
 308
 309 # With demangler in GNU ld
 310 AC_ARG_WITH(demangler-in-ld,
 311 [AS_HELP_STRING([--with-demangler-in-ld], [try to use demangler in GNU ld])],
 312 demangler_in_ld="$with_demangler_in_ld",
 313 demangler_in_ld=yes)
 314
 315 # ----------------------
 316 # Find default assembler
 317 # ----------------------
 318
 319 # With GNU as
 320 AC_ARG_WITH(gnu-as,
 321 [AS_HELP_STRING([--with-gnu-as], [arrange to work with GNU as])],
 322 gas_flag="$with_gnu_as",
 323 gas_flag=no)
 324
 325 AC_ARG_WITH(as,
 326 [AS_HELP_STRING([--with-as], [arrange to use the specified as (full pathname)])],
 327 DEFAULT_ASSEMBLER="$with_as")
 328 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
 329   if test ! -x "$DEFAULT_ASSEMBLER"; then
 330     AC_MSG_ERROR([cannot execute: $DEFAULT_ASSEMBLER: check --with-as or env. var. DEFAULT_ASSEMBLER])
 331   elif $DEFAULT_ASSEMBLER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
 332     gas_flag=yes
 333   fi
 334   AC_DEFINE_UNQUOTED(DEFAULT_ASSEMBLER,"$DEFAULT_ASSEMBLER",
 335         [Define to enable the use of a default assembler.])
 336 fi
 337
 338 AC_MSG_CHECKING([whether a default assembler was specified])
 339 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
 340   if test x"$gas_flag" = x"no"; then
 341     AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER)])
 342   else
 343     AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER - GNU as)])
 344   fi
 345 else
 346   AC_MSG_RESULT(no)
 347 fi
 348
 349 # ---------------
 350 # Find C compiler
 351 # ---------------
 352
 353 # If a non-executable a.out is present (e.g. created by GNU as above even if
 354 # invoked with -v only), the IRIX 6 native ld just overwrites the existing
 355 # file, even when creating an executable, so an execution test fails.
 356 # Remove possible default executable files to avoid this.
 357 #
 358 # FIXME: This really belongs into AC_PROG_CC and can be removed once
 359 # Autoconf includes it.
 360 rm -f a.out a.exe b.out
 361
 362 # Find the native compiler
 363 AC_PROG_CC
 364 AC_PROG_CXX
 365 ACX_PROG_GNAT([-I"$srcdir"/ada/libgnat])
 366
 367 # Do configure tests with the C++ compiler, since that's what we build with.
 368 AC_LANG(C++)
 369
 370 # Remove the -O2: for historical reasons, unless bootstrapping we prefer
 371 # optimizations to be activated explicitly by the toplevel.
 372 case "$CC" in
 373   */prev-gcc/xgcc*) ;;
 374   *) CFLAGS=`echo "$CFLAGS " | sed -e "s/-Ofast[[       ]]//" -e "s/-O[[gs]][[  ]]//" -e "s/-O[[0-9]]*[[        ]]//" `
 375      CXXFLAGS=`echo "$CXXFLAGS " | sed -e "s/-Ofast[[   ]]//" -e "s/-O[[gs]][[  ]]//" -e "s/-O[[0-9]]*[[        ]]//" ` ;;
 376 esac
 377 AC_SUBST(CFLAGS)
 378 AC_SUBST(CXXFLAGS)
 379
 380 # Determine PICFLAG for target gnatlib.
 381 GCC_PICFLAG_FOR_TARGET
 382 AC_SUBST(PICFLAG_FOR_TARGET)
 383
 384 # -------------------------
 385 # Check C compiler features
 386 # -------------------------
 387
 388 AC_USE_SYSTEM_EXTENSIONS
 389 AC_PROG_CPP
 390 AC_C_INLINE
 391
 392 AC_SYS_LARGEFILE
 393
 394 # sizeof(char) is 1 by definition.
 395 AC_CHECK_SIZEOF(void *)
 396 AC_CHECK_SIZEOF(short)
 397 AC_CHECK_SIZEOF(int)
 398 AC_CHECK_SIZEOF(long)
 399 AC_CHECK_TYPES([long long], [AC_CHECK_SIZEOF(long long)])
 400 GCC_STDINT_TYPES
 401 if test x"$ac_cv_c_uint64_t" = x"no" -o x"$ac_cv_c_int64_t" = x"no"; then
 402   AC_MSG_ERROR([uint64_t or int64_t not found])
 403 fi
 404
 405 # check what underlying integer type int64_t uses
 406 AC_CACHE_CHECK(for int64_t underlying type, ac_cv_int64_t_type, [
 407 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 408 #ifdef HAVE_STDINT_H
 409 #include <stdint.h>
 410 #endif
 411 template <typename T> struct X { };
 412 template <>
 413 struct X<long> { typedef long t; };
 414 ]], [[X<int64_t>::t x;]])],[ac_cv_int64_t_type=long],[ac_cv_int64_t_type="long long"])])
 415 if test "$ac_cv_int64_t_type" = "long"; then
 416   AC_DEFINE(INT64_T_IS_LONG, 1,
 417   [Define if int64_t uses long as underlying type.])
 418 else
 419 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 420 #ifdef HAVE_STDINT_H
 421 #include <stdint.h>
 422 #endif
 423 template <typename T> struct X { };
 424 template <>
 425 struct X<long long> { typedef long long t; };
 426 ]], [[X<int64_t>::t x;]])],[],[AC_MSG_ERROR([error verifying int64_t uses long long])])
 427 fi
 428
 429 AC_CACHE_CHECK(for std::swap in <utility>, ac_cv_std_swap_in_utility, [
 430 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 431 #include <utility>
 432 ]], [[int a, b; std::swap(a,b);]])],[ac_cv_std_swap_in_utility=yes],[ac_cv_std_swap_in_utility=no])])
 433 if test $ac_cv_std_swap_in_utility = yes; then
 434   AC_DEFINE(HAVE_SWAP_IN_UTILITY, 1,
 435   [Define if <utility> defines std::swap.])
 436 fi
 437
 438 # Check whether compiler is affected by placement new aliasing bug (PR 29286).
 439 # If the host compiler is affected by the bug, and we build with optimization
 440 # enabled (which happens e.g. when cross-compiling), the pool allocator may
 441 # get miscompiled.  Use -fno-strict-aliasing to work around this problem.
 442 # Since there is no reliable feature check for the presence of this bug,
 443 # we simply use a GCC version number check.  (This should never trigger for
 444 # stages 2 or 3 of a native bootstrap.)
 445 aliasing_flags=
 446 if test "$GCC" = yes; then
 447   saved_CXXFLAGS="$CXXFLAGS"
 448
 449   # The following test compilation will succeed if and only if $CXX accepts
 450   # -fno-strict-aliasing *and* is older than GCC 4.3.
 451   CXXFLAGS="$CXXFLAGS -fno-strict-aliasing"
 452   AC_MSG_CHECKING([whether $CXX is affected by placement new aliasing bug])
 453   AC_COMPILE_IFELSE([
 454 #if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
 455 #error compiler not affected by placement new aliasing bug
 456 #endif
 457 ],
 458     [AC_MSG_RESULT([yes]); aliasing_flags='-fno-strict-aliasing'],
 459     [AC_MSG_RESULT([no])])
 460
 461   CXXFLAGS="$saved_CXXFLAGS"
 462 fi
 463 AC_SUBST(aliasing_flags)
 464
 465
 466
 467 # ---------------------
 468 # Warnings and checking
 469 # ---------------------
 470
 471 # Check $CC warning features (if it's GCC).
 472 # We want to use -pedantic, but we don't want warnings about
 473 # * 'long long'
 474 # * variadic macros
 475 # * overlong strings
 476 # * C++11 narrowing conversions in { }
 477 # So, we only use -pedantic if we can disable those warnings.
 478
 479 # In stage 1, disable -Wformat warnings from old GCCs about new % codes
 480 AC_ARG_ENABLE(build-format-warnings,
 481   AS_HELP_STRING([--disable-build-format-warnings],[don't use -Wformat while building GCC]),
 482   [],[enable_build_format_warnings=yes])
 483 AS_IF([test $enable_build_format_warnings = no],
 484       [wf_opt=-Wno-format],[wf_opt=])
 485 ACX_PROG_CXX_WARNING_OPTS(
 486         m4_quote(m4_do([-W -Wall -Wno-narrowing -Wwrite-strings ],
 487                        [-Wcast-qual $wf_opt])), [loose_warn])
 488 ACX_PROG_CC_WARNING_OPTS(
 489         m4_quote(m4_do([-Wstrict-prototypes -Wmissing-prototypes])),
 490         [c_loose_warn])
 491 ACX_PROG_CXX_WARNING_OPTS(
 492         m4_quote(m4_do([-Wmissing-format-attribute ],
 493                        [-Woverloaded-virtual])), [strict_warn])
 494 ACX_PROG_CC_WARNING_OPTS(
 495         m4_quote(m4_do([-Wold-style-definition -Wc++-compat])), [c_strict_warn])
 496 ACX_PROG_CXX_WARNING_ALMOST_PEDANTIC(
 497         m4_quote(m4_do([-Wno-long-long -Wno-variadic-macros ],
 498                        [-Wno-overlength-strings])), [strict_warn])
 499 ACX_PROG_CXX_WARNINGS_ARE_ERRORS([manual], [strict_warn])
 500
 501 # The above macros do nothing if the compiler is not GCC.  However, the
 502 # Makefile has more goo to add other flags, so these variables are used
 503 # to enable warnings only for GCC.
 504 warn_cflags=
 505 warn_cxxflags=
 506 if test "x$GCC" = "xyes"; then
 507   warn_cflags='$(GCC_WARN_CFLAGS)'
 508   warn_cxxflags='$(GCC_WARN_CXXFLAGS)'
 509 fi
 510 AC_SUBST(warn_cflags)
 511 AC_SUBST(warn_cxxflags)
 512
 513 # Disable exceptions and RTTI if building with g++
 514 ACX_PROG_CC_WARNING_OPTS(
 515         m4_quote(m4_do([-fno-exceptions -fno-rtti -fasynchronous-unwind-tables])),
 516                        [noexception_flags])
 517
 518 # Enable expensive internal checks
 519 is_release=
 520 if test x"`cat $srcdir/DEV-PHASE`" != xexperimental; then
 521   is_release=yes
 522 fi
 523
 524 AC_ARG_ENABLE(checking,
 525 [AS_HELP_STRING([[--enable-checking[=LIST]]],
 526                 [enable expensive run-time checks.  With LIST,
 527                  enable only specific categories of checks.
 528                  Categories are: yes,no,all,none,release.
 529                  Flags are: assert,df,extra,fold,gc,gcac,gimple,misc,
 530                  rtlflag,rtl,runtime,tree,valgrind,types])],
 531 [ac_checking_flags="${enableval}"],[
 532 # Determine the default checks.
 533 if test x$is_release = x ; then
 534   ac_checking_flags=yes,extra
 535 else
 536   ac_checking_flags=release
 537 fi])
 538 IFS="${IFS=     }"; ac_save_IFS="$IFS"; IFS="$IFS,"
 539 for check in release $ac_checking_flags
 540 do
 541         case $check in
 542         # these set all the flags to specific states
 543         yes)            ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking= ;
 544                         ac_fold_checking= ; ac_gc_checking=1 ; ac_extra_checking= ;
 545                         ac_gc_always_collect= ; ac_gimple_checking=1 ; ac_rtl_checking= ;
 546                         ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
 547                         ac_tree_checking=1 ; ac_valgrind_checking= ;
 548                         ac_types_checking=1 ;;
 549         no|none)        ac_assert_checking= ; ac_checking= ; ac_df_checking= ;
 550                         ac_fold_checking= ; ac_gc_checking= ; ac_extra_checking= ;
 551                         ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
 552                         ac_rtlflag_checking= ; ac_runtime_checking= ;
 553                         ac_tree_checking= ; ac_valgrind_checking= ;
 554                         ac_types_checking= ;;
 555         all)            ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking=1 ;
 556                         ac_fold_checking=1 ; ac_gc_checking=1 ; ac_extra_checking=1 ;
 557                         ac_gc_always_collect=1 ; ac_gimple_checking=1 ; ac_rtl_checking=1 ;
 558                         ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
 559                         ac_tree_checking=1 ; ac_valgrind_checking= ;
 560                         ac_types_checking=1 ;;
 561         release)        ac_assert_checking=1 ; ac_checking= ; ac_df_checking= ;
 562                         ac_fold_checking= ; ac_gc_checking= ; ac_extra_checking= ;
 563                         ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
 564                         ac_rtlflag_checking= ; ac_runtime_checking=1 ;
 565                         ac_tree_checking= ; ac_valgrind_checking= ;
 566                         ac_types_checking= ;;
 567         # these enable particular checks
 568         assert)         ac_assert_checking=1 ;;
 569         df)             ac_df_checking=1 ;;
 570         extra)          ac_extra_checking=1 ;;
 571         fold)           ac_fold_checking=1 ;;
 572         gc)             ac_gc_checking=1 ;;
 573         gcac)           ac_gc_always_collect=1 ;;
 574         gimple)         ac_gimple_checking=1 ;;
 575         misc)           ac_checking=1 ;;
 576         rtl)            ac_rtl_checking=1 ;;
 577         rtlflag)        ac_rtlflag_checking=1 ;;
 578         runtime)        ac_runtime_checking=1 ;;
 579         tree)           ac_tree_checking=1 ;;
 580         types)          ac_types_checking=1 ;;
 581         valgrind)       ac_valgrind_checking=1 ;;
 582         *)      AC_MSG_ERROR(unknown check category $check) ;;
 583         esac
 584 done
 585 IFS="$ac_save_IFS"
 586
 587 nocommon_flag=""
 588 if test x$ac_checking != x ; then
 589   AC_DEFINE(CHECKING_P, 1,
 590 [Define to 0/1 if you want more run-time sanity checks.  This one gets a grab
 591 bag of miscellaneous but relatively cheap checks.])
 592   nocommon_flag=-fno-common
 593 else
 594   AC_DEFINE(CHECKING_P, 0)
 595 fi
 596 AC_SUBST(nocommon_flag)
 597 if test x$ac_extra_checking != x ; then
 598   AC_DEFINE(ENABLE_EXTRA_CHECKING, 1,
 599 [Define to 0/1 if you want extra run-time checking that might affect code
 600 generation.])
 601 else
 602   AC_DEFINE(ENABLE_EXTRA_CHECKING, 0)
 603 fi
 604 if test x$ac_df_checking != x ; then
 605   AC_DEFINE(ENABLE_DF_CHECKING, 1,
 606 [Define if you want more run-time sanity checks for dataflow.])
 607 fi
 608 if test x$ac_assert_checking != x ; then
 609   AC_DEFINE(ENABLE_ASSERT_CHECKING, 1,
 610 [Define if you want assertions enabled.  This is a cheap check.])
 611 fi
 612 if test x$ac_gimple_checking != x ; then
 613   AC_DEFINE(ENABLE_GIMPLE_CHECKING, 1,
 614 [Define if you want operations on GIMPLE (the basic data structure of
 615 the high-level optimizers) to be checked for dynamic type safety at
 616 runtime.  This is moderately expensive.])
 617 fi
 618 GCC_TARGET_TEMPLATE(ENABLE_RUNTIME_CHECKING)
 619 if test x$ac_runtime_checking != x ; then
 620   AC_DEFINE(ENABLE_RUNTIME_CHECKING, 1,
 621 [Define if you want runtime assertions enabled.  This is a cheap check.])
 622 fi
 623 if test x$ac_tree_checking != x ; then
 624   AC_DEFINE(ENABLE_TREE_CHECKING, 1,
 625 [Define if you want all operations on trees (the basic data
 626    structure of the front ends) to be checked for dynamic type safety
 627    at runtime.  This is moderately expensive.
 628    ])
 629   TREECHECKING=yes
 630 fi
 631 if test x$ac_types_checking != x ; then
 632   AC_DEFINE(ENABLE_TYPES_CHECKING, 1,
 633 [Define if you want all gimple types to be verified after gimplifiation.
 634    This is cheap.
 635    ])
 636 fi
 637 AC_SUBST(TREECHECKING)
 638 if test x$ac_rtl_checking != x ; then
 639   AC_DEFINE(ENABLE_RTL_CHECKING, 1,
 640 [Define if you want all operations on RTL (the basic data structure
 641    of the optimizer and back end) to be checked for dynamic type safety
 642    at runtime.  This is quite expensive.])
 643 fi
 644 if test x$ac_rtlflag_checking != x ; then
 645   AC_DEFINE(ENABLE_RTL_FLAG_CHECKING, 1,
 646 [Define if you want RTL flag accesses to be checked against the RTL
 647    codes that are supported for each access macro.  This is relatively
 648    cheap.])
 649 fi
 650 if test x$ac_gc_checking != x ; then
 651   AC_DEFINE(ENABLE_GC_CHECKING, 1,
 652 [Define if you want the garbage collector to do object poisoning and
 653    other memory allocation checks.  This is quite expensive.])
 654 fi
 655 if test x$ac_gc_always_collect != x ; then
 656   AC_DEFINE(ENABLE_GC_ALWAYS_COLLECT, 1,
 657 [Define if you want the garbage collector to operate in maximally
 658    paranoid mode, validating the entire heap and collecting garbage at
 659    every opportunity.  This is extremely expensive.])
 660 fi
 661 if test x$ac_fold_checking != x ; then
 662   AC_DEFINE(ENABLE_FOLD_CHECKING, 1,
 663 [Define if you want fold checked that it never destructs its argument.
 664    This is quite expensive.])
 665 fi
 666 valgrind_path_defines=
 667 valgrind_command=
 668
 669 dnl # This check AC_REQUIREs various stuff, so it *must not* be inside
 670 dnl # an if statement.  This was the source of very frustrating bugs
 671 dnl # in converting to autoconf 2.5x!
 672 AC_CHECK_HEADER(valgrind.h, have_valgrind_h=yes, have_valgrind_h=no)
 673
 674 # It is certainly possible that there's valgrind but no valgrind.h.
 675 # GCC relies on making annotations so we must have both.
 676 AC_MSG_CHECKING(for VALGRIND_DISCARD in <valgrind/memcheck.h>)
 677 AC_PREPROC_IFELSE([AC_LANG_SOURCE(
 678   [[#include <valgrind/memcheck.h>
 679 #ifndef VALGRIND_DISCARD
 680 #error VALGRIND_DISCARD not defined
 681 #endif]])],
 682   [gcc_cv_header_valgrind_memcheck_h=yes],
 683   [gcc_cv_header_valgrind_memcheck_h=no])
 684 AC_MSG_RESULT($gcc_cv_header_valgrind_memcheck_h)
 685 AC_MSG_CHECKING(for VALGRIND_DISCARD in <memcheck.h>)
 686 AC_PREPROC_IFELSE([AC_LANG_SOURCE(
 687   [[#include <memcheck.h>
 688 #ifndef VALGRIND_DISCARD
 689 #error VALGRIND_DISCARD not defined
 690 #endif]])],
 691   [gcc_cv_header_memcheck_h=yes],
 692   [gcc_cv_header_memcheck_h=no])
 693 AC_MSG_RESULT($gcc_cv_header_memcheck_h)
 694 if test $gcc_cv_header_valgrind_memcheck_h = yes; then
 695   AC_DEFINE(HAVE_VALGRIND_MEMCHECK_H, 1,
 696         [Define if valgrind's valgrind/memcheck.h header is installed.])
 697 fi
 698 if test $gcc_cv_header_memcheck_h = yes; then
 699   AC_DEFINE(HAVE_MEMCHECK_H, 1,
 700         [Define if valgrind's memcheck.h header is installed.])
 701 fi
 702
 703 if test x$ac_valgrind_checking != x ; then
 704   AM_PATH_PROG_WITH_TEST(valgrind_path, valgrind,
 705         [$ac_dir/$ac_word --version | grep valgrind- >/dev/null 2>&1])
 706   if test "x$valgrind_path" = "x" \
 707     || (test $have_valgrind_h = no \
 708         && test $gcc_cv_header_memcheck_h = no \
 709         && test $gcc_cv_header_valgrind_memcheck_h = no); then
 710         AC_MSG_ERROR([*** Can't find both valgrind and valgrind/memcheck.h, memcheck.h or valgrind.h])
 711   fi
 712   valgrind_path_defines=-DVALGRIND_PATH='\"'$valgrind_path'\"'
 713   valgrind_command="$valgrind_path -q"
 714   AC_DEFINE(ENABLE_VALGRIND_CHECKING, 1,
 715 [Define if you want to run subprograms and generated programs
 716    through valgrind (a memory checker).  This is extremely expensive.])
 717 fi
 718 AC_SUBST(valgrind_path_defines)
 719 AC_SUBST(valgrind_command)
 720
 721 # Enable code coverage collection
 722 AC_ARG_ENABLE(coverage,
 723 [AS_HELP_STRING([[--enable-coverage[=LEVEL]]],
 724                 [enable compiler's code coverage collection.
 725                  Use to measure compiler performance and locate
 726                  unused parts of the compiler. With LEVEL, specify
 727                  optimization. Values are opt, noopt,
 728                  default is noopt])],
 729 [case "${enableval}" in
 730   yes|noopt)
 731     coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O0 -fkeep-static-functions"
 732     ;;
 733   opt)
 734     coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O2 -fkeep-static-functions"
 735     ;;
 736   no)
 737     # a.k.a. --disable-coverage
 738     coverage_flags=""
 739     ;;
 740   *)
 741     AC_MSG_ERROR(unknown coverage setting $enableval)
 742     ;;
 743 esac],
 744 [coverage_flags=""])
 745 AC_SUBST(coverage_flags)
 746
 747 AC_ARG_ENABLE(gather-detailed-mem-stats,
 748 [AS_HELP_STRING([--enable-gather-detailed-mem-stats],
 749                 [enable detailed memory allocation stats gathering])], [],
 750 [enable_gather_detailed_mem_stats=no])
 751 gather_stats=`if test $enable_gather_detailed_mem_stats != no; then echo 1; else echo 0; fi`
 752 AC_DEFINE_UNQUOTED(GATHER_STATISTICS, $gather_stats,
 753 [Define to enable detailed memory allocation stats gathering.])
 754
 755 AC_ARG_ENABLE(valgrind-annotations,
 756 [AS_HELP_STRING([--enable-valgrind-annotations],
 757                 [enable valgrind runtime interaction])], [],
 758 [enable_valgrind_annotations=no])
 759 if test x$enable_valgrind_annotations != xno \
 760     || test x$ac_valgrind_checking != x; then
 761   if (test $have_valgrind_h = no \
 762       && test $gcc_cv_header_memcheck_h = no \
 763       && test $gcc_cv_header_valgrind_memcheck_h = no); then
 764     AC_MSG_ERROR([*** Can't find valgrind/memcheck.h, memcheck.h or valgrind.h])
 765   fi
 766   AC_DEFINE(ENABLE_VALGRIND_ANNOTATIONS, 1,
 767 [Define to get calls to the valgrind runtime enabled.])
 768 fi
 769
 770 # -------------------------------
 771 # Miscenalleous configure options
 772 # -------------------------------
 773
 774 # With stabs
 775 AC_ARG_WITH(stabs,
 776 [AS_HELP_STRING([--with-stabs],
 777                 [arrange to use stabs instead of host debug format])],
 778 stabs="$with_stabs",
 779 stabs=no)
 780
 781 # Determine whether or not multilibs are enabled.
 782 AC_ARG_ENABLE(multilib,
 783 [AS_HELP_STRING([--enable-multilib],
 784                 [enable library support for multiple ABIs])],
 785 [], [enable_multilib=yes])
 786 AC_SUBST(enable_multilib)
 787
 788 # Determine whether or not multiarch is enabled.
 789 AC_ARG_ENABLE(multiarch,
 790 [AS_HELP_STRING([--enable-multiarch],
 791                 [enable support for multiarch paths])],
 792 [case "${enableval}" in
 793 yes|no|auto) enable_multiarch=$enableval;;
 794 *) AC_MSG_ERROR(bad value ${enableval} given for --enable-multiarch option) ;;
 795 esac], [enable_multiarch=auto])
 796 if test x${enable_multiarch} = xauto; then
 797   if test x${with_native_system_header_dir} != x; then
 798     ma_msg_suffix=", disabled auto check (configured with --native-system-header-dir)"
 799     enable_multiarch=no
 800   fi
 801   if test x$host != x$target && test "x$with_sysroot" = x; then
 802     ma_msg_suffix=", disabled auto check (cross build configured without --with-sysroot)"
 803     enable_multiarch=no
 804   fi
 805 fi
 806 AC_MSG_CHECKING(for multiarch configuration)
 807 AC_SUBST(enable_multiarch)
 808 AC_MSG_RESULT($enable_multiarch$ma_msg_suffix)
 809
 810 # needed for setting the multiarch name for soft-float/hard-float ABIs
 811 AC_SUBST(with_cpu)
 812 AC_SUBST(with_float)
 813
 814 # Enable __cxa_atexit for C++.
 815 AC_ARG_ENABLE(__cxa_atexit,
 816 [AS_HELP_STRING([--enable-__cxa_atexit], [enable __cxa_atexit for C++])],
 817 [], [])
 818
 819 # Enable C extension for decimal float if target supports it.
 820 GCC_AC_ENABLE_DECIMAL_FLOAT([$target])
 821
 822 dfp=`if test $enable_decimal_float != no; then echo 1; else echo 0; fi`
 823 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_FLOAT, $dfp,
 824 [Define to 1 to enable decimal float extension to C.])
 825
 826 # Use default_decimal_float for dependency.
 827 enable_decimal_float=$default_decimal_float
 828
 829 bid=`if test $enable_decimal_float = bid; then echo 1; else echo 0; fi`
 830 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_BID_FORMAT, $bid,
 831 [Define to 1 to specify that we are using the BID decimal floating
 832 point format instead of DPD])
 833
 834 # Enable C extension for fixed-point arithmetic.
 835 AC_ARG_ENABLE(fixed-point,
 836 [AS_HELP_STRING([--enable-fixed-point],
 837                 [enable fixed-point arithmetic extension to C])],
 838 [],
 839 [
 840   case $target in
 841     arm*)
 842       enable_fixed_point=yes
 843       ;;
 844
 845     mips*-*-*)
 846       enable_fixed_point=yes
 847       ;;
 848     *)
 849       AC_MSG_WARN([fixed-point is not supported for this target, ignored])
 850       enable_fixed_point=no
 851       ;;
 852   esac
 853 ])
 854 AC_SUBST(enable_fixed_point)
 855
 856 fixedpoint=`if test $enable_fixed_point = yes; then echo 1; else echo 0; fi`
 857 AC_DEFINE_UNQUOTED(ENABLE_FIXED_POINT, $fixedpoint,
 858 [Define to 1 to enable fixed-point arithmetic extension to C.])
 859
 860 # Enable threads
 861 # Pass with no value to take the default
 862 # Pass with a value to specify a thread package
 863 AC_ARG_ENABLE(threads,
 864 [AS_HELP_STRING([[--enable-threads[=LIB]]],
 865                 [enable thread usage for target GCC,
 866                  using LIB thread package])],,
 867 [enable_threads=''])
 868
 869 AC_ARG_ENABLE(tls,
 870 [AS_HELP_STRING([--enable-tls],
 871                 [enable or disable generation of tls code
 872                  overriding the assembler check for tls support])],
 873 [
 874   case $enable_tls in
 875     yes | no) ;;
 876     *) AC_MSG_ERROR(['$enable_tls' is an invalid value for --enable-tls.
 877 Valid choices are 'yes' and 'no'.]) ;;
 878   esac
 879 ], [enable_tls=''])
 880
 881 AC_ARG_ENABLE(vtable-verify,
 882 [AS_HELP_STRING([--enable-vtable-verify],
 883                 [enable vtable verification feature])],,
 884 [enable_vtable_verify=no])
 885 vtable_verify=`if test x$enable_vtable_verify = xyes; then echo 1; else echo 0; fi`
 886 AC_DEFINE_UNQUOTED(ENABLE_VTABLE_VERIFY, $vtable_verify,
 887 [Define 0/1 if vtable verification feature is enabled.])
 888
 889 AC_ARG_ENABLE(objc-gc,
 890 [AS_HELP_STRING([--enable-objc-gc],
 891                 [enable the use of Boehm's garbage collector with
 892                  the GNU Objective-C runtime])],
 893 if test x$enable_objc_gc = xno; then
 894         objc_boehm_gc=''
 895 else
 896         objc_boehm_gc=1
 897 fi,
 898 objc_boehm_gc='')
 899
 900 AC_ARG_WITH(dwarf2,
 901 [AS_HELP_STRING([--with-dwarf2], [force the default debug format to be DWARF 2])],
 902 dwarf2="$with_dwarf2",
 903 dwarf2=no)
 904
 905 AC_ARG_ENABLE(shared,
 906 [AS_HELP_STRING([--disable-shared], [don't provide a shared libgcc])],
 907 [
 908   case $enable_shared in
 909   yes | no) ;;
 910   *)
 911     enable_shared=no
 912     IFS="${IFS=         }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
 913     for pkg in $enableval; do
 914       if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
 915         enable_shared=yes
 916       fi
 917     done
 918     IFS="$ac_save_ifs"
 919     ;;
 920   esac
 921 ], [enable_shared=yes])
 922 AC_SUBST(enable_shared)
 923
 924 AC_ARG_ENABLE(gcov,
 925 [  --disable-gcov          don't provide libgcov and related host tools],
 926 [], [enable_gcov=yes])
 927 AC_SUBST(enable_gcov)
 928
 929 AC_ARG_WITH(specs,
 930   [AS_HELP_STRING([--with-specs=SPECS],
 931                   [add SPECS to driver command-line processing])],
 932   [CONFIGURE_SPECS=$withval],
 933   [CONFIGURE_SPECS=]
 934 )
 935 AC_SUBST(CONFIGURE_SPECS)
 936
 937 ACX_PKGVERSION([GCC])
 938 ACX_BUGURL([https://gcc.gnu.org/bugs/])
 939
 940 # Sanity check enable_languages in case someone does not run the toplevel
 941 # configure # script.
 942 AC_ARG_ENABLE(languages,
 943 [AS_HELP_STRING([--enable-languages=LIST], [specify which front-ends to build])],
 944 [case ,${enable_languages}, in
 945        ,,|,yes,)
 946                 # go safe -- we cannot be much sure without the toplevel
 947                 # configure's
 948                 # analysis of which target libs are present and usable
 949                 enable_languages=c
 950                 ;;
 951          *,all,*)
 952                 AC_MSG_ERROR([only the toplevel supports --enable-languages=all])
 953                 ;;
 954         *,c,*)
 955                 ;;
 956         *)
 957                 enable_languages=c,${enable_languages}
 958                 ;;
 959 esac],
 960 [enable_languages=c])
 961
 962 if test x"$enable_as_accelerator_for" != x; then
 963   AC_DEFINE(ACCEL_COMPILER, 1,
 964     [Define if this compiler should be built as the offload target compiler.])
 965   enable_as_accelerator=yes
 966   case "${target}" in
 967     *-intelmicemul-*)
 968       # In this case we expect offload compiler to be built as native, so we
 969       # need to rename the driver to avoid clashes with host's drivers.
 970       program_transform_name="s&^&${target}-&" ;;
 971   esac
 972   sedscript="s#${target_noncanonical}#${enable_as_accelerator_for}-accel-${target_noncanonical}#"
 973   program_transform_name=`echo $program_transform_name | sed $sedscript`
 974   accel_dir_suffix=/accel/${target_noncanonical}
 975   real_target_noncanonical=${enable_as_accelerator_for}
 976 fi
 977 AC_SUBST(enable_as_accelerator)
 978 AC_SUBST(real_target_noncanonical)
 979 AC_SUBST(accel_dir_suffix)
 980
 981 for tgt in `echo $enable_offload_targets | sed 's/,/ /g'`; do
 982   tgt=`echo $tgt | sed 's/=.*//'`
 983
 984   if echo "$tgt" | grep "^hsa" > /dev/null ; then
 985     enable_hsa=1
 986   else
 987     enable_offloading=1
 988   fi
 989
 990   if test x"$offload_targets" = x; then
 991     offload_targets=$tgt
 992   else
 993     offload_targets="$offload_targets,$tgt"
 994   fi
 995 done
 996 AC_DEFINE_UNQUOTED(OFFLOAD_TARGETS, "$offload_targets",
 997   [Define to offload targets, separated by commas.])
 998 if test x"$enable_offloading" != x; then
 999   AC_DEFINE(ENABLE_OFFLOADING, 1,
1000     [Define this to enable support for offloading.])
1001 else
1002   AC_DEFINE(ENABLE_OFFLOADING, 0,
1003     [Define this to enable support for offloading.])
1004 fi
1005
1006 if test x"$enable_hsa" = x1 ; then
1007   AC_DEFINE(ENABLE_HSA, 1,
1008     [Define this to enable support for generating HSAIL.])
1009 fi
1010
1011 AC_ARG_WITH(multilib-list,
1012 [AS_HELP_STRING([--with-multilib-list], [select multilibs (AArch64, SH and x86-64 only)])],
1013 :,
1014 with_multilib_list=default)
1015
1016 # -------------------------
1017 # Checks for other programs
1018 # -------------------------
1019
1020 AC_PROG_MAKE_SET
1021
1022 # Find some useful tools
1023 AC_PROG_AWK
1024 # We need awk to create options.c and options.h.
1025 # Bail out if it's missing.
1026 case ${AWK} in
1027   "") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
1028 esac
1029
1030 gcc_AC_PROG_LN_S
1031 ACX_PROG_LN($LN_S)
1032 AC_PROG_RANLIB
1033 ranlib_flags=""
1034 AC_SUBST(ranlib_flags)
1035
1036 gcc_AC_PROG_INSTALL
1037
1038 # See if cmp has --ignore-initial.
1039 gcc_AC_PROG_CMP_IGNORE_INITIAL
1040
1041 # See if we have the mktemp command.
1042 AC_CHECK_PROG(have_mktemp_command, mktemp, yes, no)
1043
1044 # See if makeinfo has been installed and is modern enough
1045 # that we can use it.
1046 ACX_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
1047   [GNU texinfo.* \([0-9][0-9.]*\)],
1048   [4.[7-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
1049 if test $gcc_cv_prog_makeinfo_modern = no; then
1050   AC_MSG_WARN([
1051 *** Makeinfo is missing or too old.
1052 *** Info documentation will not be built.])
1053   BUILD_INFO=
1054 else
1055   BUILD_INFO=info
1056 fi
1057 AC_SUBST(BUILD_INFO)
1058
1059 # Is pod2man recent enough to regenerate manpages?
1060 AC_MSG_CHECKING([for recent Pod::Man])
1061 if (perl -e 'use 1.10 Pod::Man') >/dev/null 2>&1; then
1062   AC_MSG_RESULT(yes)
1063   GENERATED_MANPAGES=generated-manpages
1064 else
1065   AC_MSG_RESULT(no)
1066   GENERATED_MANPAGES=
1067 fi
1068 AC_SUBST(GENERATED_MANPAGES)
1069
1070 MISSING="${CONFIG_SHELL-/bin/sh} $ac_aux_dir/missing"
1071
1072 # How about lex?
1073 dnl Don't use AC_PROG_LEX; we insist on flex.
1074 dnl LEXLIB is not useful in gcc.
1075 AC_CHECK_PROGS([FLEX], flex, [$MISSING flex])
1076
1077 # Bison?
1078 AC_CHECK_PROGS([BISON], bison, [$MISSING bison])
1079
1080 # Binutils are not build modules, unlike bison/flex/makeinfo.  So we
1081 # check for build == host before using them.
1082
1083 # NM
1084 if test x${build} = x${host} && test -f $srcdir/../binutils/nm.c \
1085   && test -d ../binutils ; then
1086   NM='${objdir}/../binutils/nm-new'
1087 else
1088   AC_CHECK_PROG(NM, nm, nm, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing nm)
1089 fi
1090
1091 # AR
1092 if test x${build} = x${host} && test -f $srcdir/../binutils/ar.c \
1093   && test -d ../binutils ; then
1094   AR='${objdir}/../binutils/ar'
1095 else
1096   AC_CHECK_PROG(AR, ar, ar, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing ar)
1097 fi
1098
1099 # The jit documentation looks better if built with sphinx, but can be
1100 # built with texinfo if sphinx is not available.
1101 # Set "doc_build_sys" to "sphinx" or "texinfo" accordingly.
1102 AC_CHECK_PROG(doc_build_sys, sphinx-build, sphinx, texinfo)
1103
1104 # --------------------
1105 # Checks for C headers
1106 # --------------------
1107
1108 # Need to reject headers which give warnings, so that the -Werror bootstrap
1109 # works later. *sigh*  This needs to come before all header checks.
1110 AC_PROG_CPP_WERROR
1111
1112 AC_HEADER_STDC
1113 AC_HEADER_TIME
1114 ACX_HEADER_STRING
1115 AC_HEADER_SYS_WAIT
1116 AC_HEADER_TIOCGWINSZ
1117 AC_CHECK_HEADERS(limits.h stddef.h string.h strings.h stdlib.h time.h iconv.h \
1118                  fcntl.h ftw.h unistd.h sys/file.h sys/time.h sys/mman.h \
1119                  sys/resource.h sys/param.h sys/times.h sys/stat.h \
1120                  direct.h malloc.h langinfo.h ldfcn.h locale.h wchar.h)
1121
1122 # Check for thread headers.
1123 AC_CHECK_HEADER(thread.h, [have_thread_h=yes], [have_thread_h=])
1124 AC_CHECK_HEADER(pthread.h, [have_pthread_h=yes], [have_pthread_h=])
1125
1126 # These tests can't be done till we know if we have limits.h.
1127 gcc_AC_C_CHAR_BIT
1128 AC_C_BIGENDIAN
1129
1130 # ----------------------
1131 # Checks for C++ headers
1132 # ----------------------
1133
1134 dnl Autoconf will give an error in the configure script if there is no
1135 dnl C++ preprocessor.  Hack to prevent that.
1136 m4_pushdef([AC_MSG_ERROR], m4_defn([AC_MSG_WARN]))[]dnl
1137 AC_PROG_CXXCPP
1138 m4_popdef([AC_MSG_ERROR])[]dnl
1139
1140 AC_CHECK_HEADERS(unordered_map)
1141 AC_CHECK_HEADERS(tr1/unordered_map)
1142 AC_CHECK_HEADERS(ext/hash_map)
1143
1144 # --------
1145 # Dependency checking.
1146 # --------
1147
1148 ZW_CREATE_DEPDIR
1149 AC_CONFIG_COMMANDS([gccdepdir],[
1150   ${CONFIG_SHELL-/bin/sh} $ac_aux_dir/mkinstalldirs build/$DEPDIR
1151   for lang in $subdirs c-family common
1152   do
1153       ${CONFIG_SHELL-/bin/sh} $ac_aux_dir/mkinstalldirs $lang/$DEPDIR
1154   done], [subdirs="$subdirs" ac_aux_dir=$ac_aux_dir DEPDIR=$DEPDIR])
1155
1156 ZW_PROG_COMPILER_DEPENDENCIES([CXX])
1157
1158 # --------
1159 # UNSORTED
1160 # --------
1161
1162
1163 # These libraries may be used by collect2.
1164 # We may need a special search path to get them linked.
1165 AC_CACHE_CHECK(for collect2 libraries, gcc_cv_collect2_libs,
1166 [save_LIBS="$LIBS"
1167 for libs in '' -lld -lmld \
1168                 '-L/usr/lib/cmplrs/cc2.11 -lmld' \
1169                 '-L/usr/lib/cmplrs/cc3.11 -lmld'
1170 do
1171         LIBS="$libs"
1172         AC_TRY_LINK_FUNC(ldopen,
1173                 [gcc_cv_collect2_libs="$libs"; break])
1174 done
1175 LIBS="$save_LIBS"
1176 test -z "$gcc_cv_collect2_libs" && gcc_cv_collect2_libs='none required'])
1177 case $gcc_cv_collect2_libs in
1178         "none required")        ;;
1179         *)      COLLECT2_LIBS=$gcc_cv_collect2_libs ;;
1180 esac
1181 AC_SUBST(COLLECT2_LIBS)
1182
1183 # When building Ada code on Alpha, we need exc_resume which is usually in
1184 # -lexc.  So test for it.
1185 save_LIBS="$LIBS"
1186 LIBS=
1187 AC_SEARCH_LIBS(exc_resume, exc)
1188 GNAT_LIBEXC="$LIBS"
1189 LIBS="$save_LIBS"
1190 AC_SUBST(GNAT_LIBEXC)
1191
1192 # To support -mcpu=native on Solaris/SPARC, we need libkstat.
1193 save_LIBS="$LIBS"
1194 LIBS=
1195 AC_SEARCH_LIBS(kstat_open, kstat)
1196 EXTRA_GCC_LIBS="$LIBS"
1197 LIBS="$save_LIBS"
1198 AC_SUBST(EXTRA_GCC_LIBS)
1199
1200 # Some systems put ldexp and frexp in libm instead of libc; assume
1201 # they're both in the same place.  jcf-dump needs them.
1202 save_LIBS="$LIBS"
1203 LIBS=
1204 AC_SEARCH_LIBS(ldexp, m)
1205 LDEXP_LIB="$LIBS"
1206 LIBS="$save_LIBS"
1207 AC_SUBST(LDEXP_LIB)
1208
1209 # Use <inttypes.h> only if it exists,
1210 # doesn't clash with <sys/types.h>, declares intmax_t and defines
1211 # PRId64
1212 AC_MSG_CHECKING(for inttypes.h)
1213 AC_CACHE_VAL(gcc_cv_header_inttypes_h,
1214 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
1215 [[#define __STDC_FORMAT_MACROS
1216 #include <sys/types.h>
1217 #include <inttypes.h>]],
1218   [[intmax_t i = -1;
1219 #ifndef PRId64
1220 choke me
1221 #endif]])],
1222   [gcc_cv_header_inttypes_h=yes],
1223   [gcc_cv_header_inttypes_h=no])])
1224 AC_MSG_RESULT($gcc_cv_header_inttypes_h)
1225 if test $gcc_cv_header_inttypes_h = yes; then
1226   AC_DEFINE(HAVE_INTTYPES_H, 1,
1227         [Define if you have a working <inttypes.h> header file.])
1228 fi
1229
1230 dnl Disabled until we have a complete test for buggy enum bitfields.
1231 dnl gcc_AC_C_ENUM_BF_UNSIGNED
1232
1233 define(gcc_UNLOCKED_FUNCS, clearerr_unlocked feof_unlocked dnl
1234   ferror_unlocked fflush_unlocked fgetc_unlocked fgets_unlocked dnl
1235   fileno_unlocked fprintf_unlocked fputc_unlocked fputs_unlocked dnl
1236   fread_unlocked fwrite_unlocked getchar_unlocked getc_unlocked dnl
1237   putchar_unlocked putc_unlocked)
1238 AC_CHECK_FUNCS(times clock kill getrlimit setrlimit atoq \
1239         popen sysconf strsignal getrusage nl_langinfo \
1240         gettimeofday mbstowcs wcswidth mmap setlocale \
1241         gcc_UNLOCKED_FUNCS madvise)
1242
1243 if test x$ac_cv_func_mbstowcs = xyes; then
1244   AC_CACHE_CHECK(whether mbstowcs works, gcc_cv_func_mbstowcs_works,
1245 [    AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <stdlib.h>
1246 int main()
1247 {
1248   mbstowcs(0, "", 0);
1249   return 0;
1250 }]])],
1251     [gcc_cv_func_mbstowcs_works=yes],
1252     [gcc_cv_func_mbstowcs_works=no],
1253     [gcc_cv_func_mbstowcs_works=yes])])
1254   if test x$gcc_cv_func_mbstowcs_works = xyes; then
1255     AC_DEFINE(HAVE_WORKING_MBSTOWCS, 1,
1256   [Define this macro if mbstowcs does not crash when its
1257    first argument is NULL.])
1258   fi
1259 fi
1260
1261 AC_CHECK_TYPE(ssize_t, int)
1262 AC_CHECK_TYPE(caddr_t, char *)
1263
1264 GCC_AC_FUNC_MMAP_BLACKLIST
1265
1266 case "${host}" in
1267 *-*-*vms*)
1268   # Under VMS, vfork works very differently than on Unix. The standard test
1269   # won't work, and it isn't easily adaptable. It makes more sense to
1270   # just force it.
1271   ac_cv_func_vfork_works=yes
1272   ;;
1273 esac
1274 AC_FUNC_FORK
1275
1276 AM_ICONV
1277
1278 # Until we have in-tree GNU iconv:
1279 LIBICONV_DEP=
1280 if test -f "$LTLIBICONV"; then
1281   LIBICONV_DEP=$LTLIBICONV
1282 fi
1283 AC_SUBST(LIBICONV_DEP)
1284
1285 AM_LC_MESSAGES
1286
1287 AM_LANGINFO_CODESET
1288
1289 # We will need to find libiberty.h and ansidecl.h
1290 saved_CFLAGS="$CFLAGS"
1291 CFLAGS="$CFLAGS -I${srcdir} -I${srcdir}/../include $GMPINC"
1292 saved_CXXFLAGS="$CXXFLAGS"
1293 CXXFLAGS="$CXXFLAGS -I${srcdir} -I${srcdir}/../include $GMPINC"
1294
1295 # gcc_AC_CHECK_DECLS doesn't support overloaded functions, so use the
1296 # normal autoconf function for these.  But force definition of
1297 # HAVE_DECL_BASENAME like gcc_AC_CHECK_DECLS does, to suppress the bizarre
1298 # basename handling in libiberty.h.
1299 AC_CHECK_DECLS([basename(const char*), strstr(const char*,const char*)], , ,[
1300 #undef HAVE_DECL_BASENAME
1301 #define HAVE_DECL_BASENAME 1
1302 #include "ansidecl.h"
1303 #include "system.h"])
1304
1305 gcc_AC_CHECK_DECLS(getenv atol atoll asprintf sbrk abort atof getcwd getwd \
1306         madvise stpcpy strnlen strsignal strverscmp \
1307         strtol strtoul strtoll strtoull setenv unsetenv \
1308         errno snprintf vsnprintf vasprintf malloc realloc calloc \
1309         free getopt clock getpagesize ffs gcc_UNLOCKED_FUNCS, , ,[
1310 #include "ansidecl.h"
1311 #include "system.h"])
1312
1313 gcc_AC_CHECK_DECLS(getrlimit setrlimit getrusage, , ,[
1314 #include "ansidecl.h"
1315 #include "system.h"
1316 #ifdef HAVE_SYS_RESOURCE_H
1317 #include <sys/resource.h>
1318 #endif
1319 ])
1320
1321 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1322 #include "ansidecl.h"
1323 #include "system.h"
1324 #ifdef HAVE_SYS_RESOURCE_H
1325 #include <sys/resource.h>
1326 #endif
1327 ]], [[rlim_t l = 0;]])],[],[AC_DEFINE([rlim_t],[long],
1328 [Define to `long' if <sys/resource.h> doesn't define.])])
1329
1330 # On AIX 5.2, <ldfcn.h> conflicts with <fcntl.h>, as both define incompatible
1331 # FREAD and FWRITE macros.  Fortunately, for GCC's single usage of ldgetname
1332 # in collect2.c, <fcntl.h> isn't visible, but the configure test below needs
1333 # to undef these macros to get the correct value for HAVE_DECL_LDGETNAME.
1334 gcc_AC_CHECK_DECLS(ldgetname, , ,[
1335 #include "ansidecl.h"
1336 #include "system.h"
1337 #ifdef HAVE_LDFCN_H
1338 #undef FREAD
1339 #undef FWRITE
1340 #include <ldfcn.h>
1341 #endif
1342 ])
1343
1344 gcc_AC_CHECK_DECLS(times, , ,[
1345 #include "ansidecl.h"
1346 #include "system.h"
1347 #ifdef HAVE_SYS_TIMES_H
1348 #include <sys/times.h>
1349 #endif
1350 ])
1351
1352 gcc_AC_CHECK_DECLS(sigaltstack, , ,[
1353 #include "ansidecl.h"
1354 #include "system.h"
1355 #include <signal.h>
1356 ])
1357
1358 # More time-related stuff.
1359 AC_CACHE_CHECK(for struct tms, ac_cv_struct_tms, [
1360 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1361 #include "ansidecl.h"
1362 #include "system.h"
1363 #ifdef HAVE_SYS_TIMES_H
1364 #include <sys/times.h>
1365 #endif
1366 ]], [[struct tms tms;]])],[ac_cv_struct_tms=yes],[ac_cv_struct_tms=no])])
1367 if test $ac_cv_struct_tms = yes; then
1368   AC_DEFINE(HAVE_STRUCT_TMS, 1,
1369   [Define if <sys/times.h> defines struct tms.])
1370 fi
1371
1372 # use gcc_cv_* here because this doesn't match the behavior of AC_CHECK_TYPE.
1373 # revisit after autoconf 2.50.
1374 AC_CACHE_CHECK(for clock_t, gcc_cv_type_clock_t, [
1375 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1376 #include "ansidecl.h"
1377 #include "system.h"
1378 ]], [[clock_t x;]])],[gcc_cv_type_clock_t=yes],[gcc_cv_type_clock_t=no])])
1379 if test $gcc_cv_type_clock_t = yes; then
1380   AC_DEFINE(HAVE_CLOCK_T, 1,
1381   [Define if <time.h> defines clock_t.])
1382 fi
1383
1384 # Check if F_SETLKW is supported by fcntl.
1385 AC_CACHE_CHECK(for F_SETLKW, ac_cv_f_setlkw, [
1386 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1387 #include <fcntl.h>]], [[
1388 struct flock fl;
1389 fl.l_whence = 0;
1390 fl.l_start = 0;
1391 fl.l_len = 0;
1392 fl.l_pid = 0;
1393 return fcntl (1, F_SETLKW, &fl);]])],
1394 [ac_cv_f_setlkw=yes],[ac_cv_f_setlkw=no])])
1395 if test $ac_cv_f_setlkw = yes; then
1396   AC_DEFINE(HOST_HAS_F_SETLKW, 1,
1397   [Define if F_SETLKW supported by fcntl.])
1398 fi
1399
1400 # Restore CFLAGS, CXXFLAGS from before the gcc_AC_NEED_DECLARATIONS tests.
1401 CFLAGS="$saved_CFLAGS"
1402 CXXFLAGS="$saved_CXXFLAGS"
1403
1404 # mkdir takes a single argument on some systems.
1405 gcc_AC_FUNC_MKDIR_TAKES_ONE_ARG
1406
1407 # File extensions
1408 manext='.1'
1409 objext='.o'
1410 AC_SUBST(manext)
1411 AC_SUBST(objext)
1412
1413 # With Setjmp/Longjmp based exception handling.
1414 AC_ARG_ENABLE(sjlj-exceptions,
1415 [AS_HELP_STRING([--enable-sjlj-exceptions],
1416                 [arrange to use setjmp/longjmp exception handling])],
1417 [case $target in
1418   *-*-hpux10*)
1419     if test $enableval != yes; then
1420       AC_MSG_WARN([dwarf2 exceptions not supported, sjlj exceptions forced])
1421       enableval=yes
1422     fi
1423     ;;
1424 esac
1425 force_sjlj_exceptions=yes],
1426 [case $target in
1427   *-*-hpux10*)
1428     force_sjlj_exceptions=yes
1429     enableval=yes
1430     ;;
1431   lm32*-*-*)
1432      force_sjlj_exceptions=yes
1433      enableval=yes
1434      ;;
1435   *)
1436     force_sjlj_exceptions=no
1437     ;;
1438 esac])
1439 if test $force_sjlj_exceptions = yes; then
1440   sjlj=`if test $enableval = yes; then echo 1; else echo 0; fi`
1441   AC_DEFINE_UNQUOTED(CONFIG_SJLJ_EXCEPTIONS, $sjlj,
1442     [Define 0/1 to force the choice for exception handling model.])
1443 fi
1444
1445 # --------------------------------------------------------
1446 # Build, host, and target specific configuration fragments
1447 # --------------------------------------------------------
1448
1449 # Collect build-machine-specific information.
1450 . ${srcdir}/config.build || exit 1
1451
1452 # Collect host-machine-specific information.
1453 . ${srcdir}/config.host || exit 1
1454
1455 target_gtfiles=
1456
1457 # Collect target-machine-specific information.
1458 . ${srcdir}/config.gcc || exit 1
1459
1460 extra_objs="${host_extra_objs} ${extra_objs}"
1461 extra_gcc_objs="${host_extra_gcc_objs} ${extra_gcc_objs}"
1462
1463 # Default the target-machine variables that were not explicitly set.
1464 if test x"$tm_file" = x
1465 then tm_file=$cpu_type/$cpu_type.h; fi
1466
1467 if test x"$extra_headers" = x
1468 then extra_headers=; fi
1469
1470 if test x$md_file = x
1471 then md_file=$cpu_type/$cpu_type.md; fi
1472
1473 if test x$out_file = x
1474 then out_file=$cpu_type/$cpu_type.c; fi
1475
1476 if test x"$tmake_file" = x
1477 then tmake_file=$cpu_type/t-$cpu_type
1478 fi
1479
1480 # Support --enable-initfini-array.
1481 if test x$enable_initfini_array != xno; then
1482   tm_file="${tm_file} initfini-array.h"
1483 fi
1484
1485 if test x"$dwarf2" = xyes
1486 then tm_file="$tm_file tm-dwarf2.h"
1487 fi
1488
1489 # Say what files are being used for the output code and MD file.
1490 echo "Using \`$srcdir/config/$out_file' for machine-specific logic."
1491 echo "Using \`$srcdir/config/$md_file' as machine description file."
1492
1493 # If any of the xm_file variables contain nonexistent files, warn
1494 # about them and drop them.
1495
1496 bx=
1497 for x in $build_xm_file; do
1498   if    test -f $srcdir/config/$x
1499   then      bx="$bx $x"
1500   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1501   fi
1502 done
1503 build_xm_file="$bx"
1504
1505 hx=
1506 for x in $host_xm_file; do
1507   if    test -f $srcdir/config/$x
1508   then      hx="$hx $x"
1509   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1510   fi
1511 done
1512 host_xm_file="$hx"
1513
1514 tx=
1515 for x in $xm_file; do
1516   if    test -f $srcdir/config/$x
1517   then      tx="$tx $x"
1518   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1519   fi
1520 done
1521 xm_file="$tx"
1522
1523 count=a
1524 for f in $tm_file; do
1525         count=${count}x
1526 done
1527 if test $count = ax; then
1528         echo "Using \`$srcdir/config/$tm_file' as target machine macro file."
1529 else
1530         echo "Using the following target machine macro files:"
1531         for f in $tm_file; do
1532                 echo "  $srcdir/config/$f"
1533         done
1534 fi
1535
1536 if test x$use_long_long_for_widest_fast_int = xyes; then
1537         AC_DEFINE(USE_LONG_LONG_FOR_WIDEST_FAST_INT, 1,
1538 [Define to 1 if the 'long long' type is wider than 'long' but still
1539 efficiently supported by the host hardware.])
1540 fi
1541
1542 gnu_ld_bool=`if test x"$gnu_ld" = x"yes"; then echo 1; else echo 0; fi`
1543 AC_DEFINE_UNQUOTED(HAVE_GNU_LD, $gnu_ld_bool, [Define to 1 if using GNU ld.])
1544
1545 gnu_as_bool=`if test x"$gas" = x"yes"; then echo 1; else echo 0; fi`
1546 AC_DEFINE_UNQUOTED(HAVE_GNU_AS, $gnu_as_bool, [Define to 1 if using GNU as.])
1547
1548 count=a
1549 for f in $host_xm_file; do
1550         count=${count}x
1551 done
1552 if test $count = a; then
1553         :
1554 elif test $count = ax; then
1555         echo "Using \`$srcdir/config/$host_xm_file' as host machine macro file."
1556 else
1557         echo "Using the following host machine macro files:"
1558         for f in $host_xm_file; do
1559                 echo "  $srcdir/config/$f"
1560         done
1561 fi
1562 echo "Using ${out_host_hook_obj} for host machine hooks."
1563
1564 if test "$host_xm_file" != "$build_xm_file"; then
1565         count=a
1566         for f in $build_xm_file; do
1567                 count=${count}x
1568         done
1569         if test $count = a; then
1570                 :
1571         elif test $count = ax; then
1572                 echo "Using \`$srcdir/config/$build_xm_file' as build machine macro file."
1573         else
1574                 echo "Using the following build machine macro files:"
1575                 for f in $build_xm_file; do
1576                         echo "  $srcdir/config/$f"
1577                 done
1578         fi
1579 fi
1580
1581 if test -n "$configured_native_system_header_dir"; then
1582   native_system_header_dir=$configured_native_system_header_dir
1583 fi
1584 NATIVE_SYSTEM_HEADER_DIR="$native_system_header_dir"
1585 AC_SUBST(NATIVE_SYSTEM_HEADER_DIR)
1586
1587 case ${host} in
1588   powerpc*-*-darwin*)
1589     AC_CACHE_CHECK([whether mcontext_t fields have underscores],
1590       gcc_cv_mcontext_underscores,
1591       AC_COMPILE_IFELSE([
1592 #include <sys/cdefs.h>
1593 #include <sys/signal.h>
1594 #include <ucontext.h>
1595 int main() { mcontext_t m; if (m->ss.srr0) return 0; return 0; }
1596 ],
1597         gcc_cv_mcontext_underscores=no, gcc_cv_mcontext_underscores=yes))
1598       if test $gcc_cv_mcontext_underscores = yes; then
1599         AC_DEFINE(HAS_MCONTEXT_T_UNDERSCORES,,dnl
1600           [mcontext_t fields start with __])
1601       fi
1602     ;;
1603 esac
1604
1605 # ---------
1606 # Threading
1607 # ---------
1608
1609 # Check if a valid thread package
1610 case ${enable_threads} in
1611   "" | no)
1612     # No threads
1613     target_thread_file='single'
1614     ;;
1615   yes)
1616     # default
1617     target_thread_file='single'
1618     ;;
1619   aix | dce | lynx | mipssde | posix | rtems | \
1620   single | tpf | vxworks | win32)
1621     target_thread_file=${enable_threads}
1622     ;;
1623   *)
1624     echo "${enable_threads} is an unknown thread package" 1>&2
1625     exit 1
1626     ;;
1627 esac
1628
1629 if test x${thread_file} = x; then
1630   # No thread file set by target-specific clauses in config.gcc,
1631   # so use file chosen by default logic above
1632   thread_file=${target_thread_file}
1633 fi
1634
1635 # --------
1636 # UNSORTED
1637 # --------
1638
1639 use_cxa_atexit=no
1640 if test x$enable___cxa_atexit = xyes || \
1641    test x$enable___cxa_atexit = x -a x$default_use_cxa_atexit = xyes; then
1642   if test x$host = x$target; then
1643     case $host in
1644       # mingw32 doesn't have __cxa_atexit but uses atexit registration
1645       # keyed to flag_use_cxa_atexit
1646       *-*-mingw32*)
1647         use_cxa_atexit=yes
1648         ;;
1649       powerpc-ibm-aix*)
1650         use_cxa_atexit=yes
1651         ;;
1652       *)
1653         AC_CHECK_FUNC(__cxa_atexit,[use_cxa_atexit=yes],
1654           [echo "__cxa_atexit can't be enabled on this target"])
1655         ;;
1656     esac
1657   else
1658     # We can't check for __cxa_atexit when building a cross, so assume
1659     # it is available
1660     use_cxa_atexit=yes
1661   fi
1662   if test x$use_cxa_atexit = xyes; then
1663     AC_DEFINE(DEFAULT_USE_CXA_ATEXIT, 2,
1664       [Define if you want to use __cxa_atexit, rather than atexit, to
1665       register C++ destructors for local statics and global objects.
1666       This is essential for fully standards-compliant handling of
1667       destructors, but requires __cxa_atexit in libc.])
1668   fi
1669 fi
1670
1671 # Look for a file containing extra machine modes.
1672 if test -n "$extra_modes" && test -f $srcdir/config/$extra_modes; then
1673   extra_modes_file='$(srcdir)'/config/${extra_modes}
1674   AC_SUBST(extra_modes_file)
1675   AC_DEFINE_UNQUOTED(EXTRA_MODES_FILE, "config/$extra_modes",
1676   [Define to the name of a file containing a list of extra machine modes
1677    for this architecture.])
1678 fi
1679
1680 # Convert extra_options into a form suitable for Makefile use.
1681 extra_opt_files=
1682 all_opt_files=
1683 for f in $extra_options; do
1684   extra_opt_files="$extra_opt_files \$(srcdir)/config/$f"
1685   all_opt_files="$all_opt_files $srcdir/config/$f"
1686 done
1687 AC_SUBST(extra_opt_files)
1688
1689 # auto-host.h is the file containing items generated by autoconf and is
1690 # the first file included by config.h.
1691 # If host=build, it is correct to have bconfig include auto-host.h
1692 # as well.  If host!=build, we are in error and need to do more
1693 # work to find out the build config parameters.
1694 if test x$host = x$build
1695 then
1696         build_auto=auto-host.h
1697 else
1698         # We create a subdir, then run autoconf in the subdir.
1699         # To prevent recursion we set host and build for the new
1700         # invocation of configure to the build for this invocation
1701         # of configure.
1702         tempdir=build.$$
1703         rm -rf $tempdir
1704         mkdir $tempdir
1705         cd $tempdir
1706         case ${srcdir} in
1707         /* | [A-Za-z]:[\\/]* ) realsrcdir=${srcdir};;
1708         *) realsrcdir=../${srcdir};;
1709         esac
1710         # Clearing GMPINC is necessary to prevent host headers being
1711         # used by the build compiler.  Defining GENERATOR_FILE stops
1712         # system.h from including gmp.h.
1713         CC="${CC_FOR_BUILD}" CFLAGS="${CFLAGS_FOR_BUILD}" \
1714         CXX="${CXX_FOR_BUILD}" CXXFLAGS="${CXXFLAGS_FOR_BUILD}" \
1715         LD="${LD_FOR_BUILD}" LDFLAGS="${LDFLAGS_FOR_BUILD}" \
1716         GMPINC="" CPPFLAGS="${CPPFLAGS} -DGENERATOR_FILE" \
1717         ${realsrcdir}/configure \
1718                 --enable-languages=${enable_languages-all} \
1719                 --target=$target_alias --host=$build_alias --build=$build_alias
1720
1721         # We just finished tests for the build machine, so rename
1722         # the file auto-build.h in the gcc directory.
1723         mv auto-host.h ../auto-build.h
1724         cd ..
1725         rm -rf $tempdir
1726         build_auto=auto-build.h
1727 fi
1728 AC_SUBST(build_subdir)
1729
1730 tm_file="${tm_file} defaults.h"
1731 tm_p_file="${tm_p_file} tm-preds.h"
1732 host_xm_file="auto-host.h ansidecl.h ${host_xm_file}"
1733 build_xm_file="${build_auto} ansidecl.h ${build_xm_file}"
1734 # We don't want ansidecl.h in target files, write code there in ISO/GNU C.
1735 # put this back in temporarily.
1736 xm_file="auto-host.h ansidecl.h ${xm_file}"
1737
1738 # --------
1739 # UNSORTED
1740 # --------
1741
1742 changequote(,)dnl
1743 # Compile in configure arguments.
1744 if test -f configargs.h ; then
1745         # Being re-configured.
1746         gcc_config_arguments=`grep configuration_arguments configargs.h | sed -e 's/.*"\([^"]*\)".*/\1/'`
1747         gcc_reconf_arguments=`echo "$gcc_config_arguments" | sed -e 's/^.*\( : (reconfigured) .*$\)/\1/'`
1748         if [ "$gcc_reconf_arguments" != " : (reconfigured) $TOPLEVEL_CONFIGURE_ARGUMENTS" ]; then
1749                 gcc_config_arguments="$gcc_config_arguments : (reconfigured) $TOPLEVEL_CONFIGURE_ARGUMENTS"
1750         fi
1751 else
1752         gcc_config_arguments="$TOPLEVEL_CONFIGURE_ARGUMENTS"
1753 fi
1754
1755 # Double all backslashes and backslash all quotes to turn
1756 # gcc_config_arguments into a C string.
1757 sed -e 's/\\/\\\\/g; s/"/\\"/g' <<EOF >conftest.out
1758 $gcc_config_arguments
1759 EOF
1760 gcc_config_arguments_str=`cat conftest.out`
1761 rm -f conftest.out
1762
1763 cat > configargs.h <<EOF
1764 /* Generated automatically. */
1765 static const char configuration_arguments[] = "$gcc_config_arguments_str";
1766 static const char thread_model[] = "$thread_file";
1767
1768 static const struct {
1769   const char *name, *value;
1770 } configure_default_options[] = $configure_default_options;
1771 EOF
1772 changequote([,])dnl
1773
1774 changequote(,)dnl
1775 gcc_BASEVER=`cat $srcdir/BASE-VER`
1776 gcc_DEVPHASE=`cat $srcdir/DEV-PHASE`
1777 gcc_DATESTAMP=`cat $srcdir/DATESTAMP`
1778 if test -f $srcdir/REVISION ; then
1779         gcc_REVISION=`cat $srcdir/REVISION`
1780 else
1781         gcc_REVISION=""
1782 fi
1783 cat > plugin-version.h <<EOF
1784 #include "configargs.h"
1785
1786 #define GCCPLUGIN_VERSION_MAJOR   `echo $gcc_BASEVER | sed -e 's/^\([0-9]*\).*$/\1/'`
1787 #define GCCPLUGIN_VERSION_MINOR   `echo $gcc_BASEVER | sed -e 's/^[0-9]*\.\([0-9]*\).*$/\1/'`
1788 #define GCCPLUGIN_VERSION_PATCHLEVEL   `echo $gcc_BASEVER | sed -e 's/^[0-9]*\.[0-9]*\.\([0-9]*\)$/\1/'`
1789 #define GCCPLUGIN_VERSION  (GCCPLUGIN_VERSION_MAJOR*1000 + GCCPLUGIN_VERSION_MINOR)
1790
1791 static char basever[] = "$gcc_BASEVER";
1792 static char datestamp[] = "$gcc_DATESTAMP";
1793 static char devphase[] = "$gcc_DEVPHASE";
1794 static char revision[] = "$gcc_REVISION";
1795
1796 /* FIXME plugins: We should make the version information more precise.
1797    One way to do is to add a checksum. */
1798
1799 static struct plugin_gcc_version gcc_version = {basever, datestamp,
1800                                                 devphase, revision,
1801                                                 configuration_arguments};
1802 EOF
1803 changequote([,])dnl
1804
1805 # Determine what GCC version number to use in filesystem paths.
1806 GCC_BASE_VER
1807
1808 # Internationalization
1809 ZW_GNU_GETTEXT_SISTER_DIR
1810
1811 # If LIBINTL contains LIBICONV, then clear LIBICONV so we don't get
1812 # -liconv on the link line twice.
1813 case "$LIBINTL" in *$LIBICONV*)
1814         LIBICONV= ;;
1815 esac
1816
1817 AC_ARG_ENABLE(secureplt,
1818 [AS_HELP_STRING([--enable-secureplt],
1819                 [enable -msecure-plt by default for PowerPC])],
1820 [], [])
1821
1822 AC_ARG_ENABLE(mingw-wildcard,
1823 [AS_HELP_STRING([--enable-mingw-wildcard],
1824                 [Set whether to expand wildcard on command-line.
1825                  Default to platform configuration])],
1826 [],[enable_mingw_wildcard=platform])
1827 AS_IF([test x"$enable_mingw_wildcard" != xplatform ],
1828       [AC_DEFINE_UNQUOTED(MINGW_DOWILDCARD,
1829                  $(test x"$enable_mingw_wildcard" = xno; echo $?),
1830                  [Value to set mingw's _dowildcard to.])])
1831
1832 AC_ARG_ENABLE(leading-mingw64-underscores,
1833   AS_HELP_STRING([--enable-leading-mingw64-underscores],
1834                  [enable leading underscores on 64 bit mingw targets]),
1835   [],[])
1836 AS_IF([ test x"$enable_leading_mingw64_underscores" = xyes ],
1837   [AC_DEFINE(USE_MINGW64_LEADING_UNDERSCORES, 1,
1838     [Define if we should use leading underscore on 64 bit mingw targets])])
1839
1840 AC_ARG_ENABLE(cld,
1841 [AS_HELP_STRING([--enable-cld], [enable -mcld by default for 32bit x86])], [],
1842 [enable_cld=no])
1843
1844 AC_ARG_ENABLE(frame-pointer,
1845 [AS_HELP_STRING([--enable-frame-pointer],
1846                 [enable -fno-omit-frame-pointer by default for 32bit x86])], [],
1847 [
1848 case $target_os in
1849 linux* | darwin[[8912]]*)
1850   # Enable -fomit-frame-pointer by default for Linux and Darwin with
1851   # DWARF2.
1852   enable_frame_pointer=no
1853   ;;
1854 *)
1855   enable_frame_pointer=yes
1856   ;;
1857 esac
1858 ])
1859
1860 # Windows32 Registry support for specifying GCC installation paths.
1861 AC_ARG_ENABLE(win32-registry,
1862 [AS_HELP_STRING([--disable-win32-registry],
1863                 [disable lookup of installation paths in the
1864                  Registry on Windows hosts])
1865 AS_HELP_STRING([--enable-win32-registry], [enable registry lookup (default)])
1866 AS_HELP_STRING([--enable-win32-registry=KEY],
1867                [use KEY instead of GCC version as the last portion
1868                 of the registry key])],,)
1869
1870 case $host_os in
1871   win32 | pe | cygwin* | mingw32*)
1872     if test "x$enable_win32_registry" != xno; then
1873       AC_SEARCH_LIBS(RegOpenKeyExA, advapi32,, [enable_win32_registry=no])
1874     fi
1875
1876     if test "x$enable_win32_registry" != xno; then
1877       AC_DEFINE(ENABLE_WIN32_REGISTRY, 1,
1878   [Define to 1 if installation paths should be looked up in the Windows
1879    Registry. Ignored on non-Windows hosts.])
1880
1881       if test "x$enable_win32_registry" != xyes \
1882          && test "x$enable_win32_registry" != x; then
1883         AC_DEFINE_UNQUOTED(WIN32_REGISTRY_KEY, "$enable_win32_registry",
1884   [Define to be the last component of the Windows registry key under which
1885    to look for installation paths.  The full key used will be
1886    HKEY_LOCAL_MACHINE/SOFTWARE/Free Software Foundation/{WIN32_REGISTRY_KEY}.
1887    The default is the GCC version number.])
1888       fi
1889     fi
1890   ;;
1891 esac
1892
1893 # Get an absolute path to the GCC top-level source directory
1894 holddir=`${PWDCMD-pwd}`
1895 cd $srcdir
1896 topdir=`${PWDCMD-pwd}`
1897 cd $holddir
1898
1899 # Conditionalize the makefile for this host machine.
1900 xmake_file=
1901 for f in ${host_xmake_file}
1902 do
1903         if test -f ${srcdir}/config/$f
1904         then
1905                 xmake_file="${xmake_file} \$(srcdir)/config/$f"
1906         fi
1907 done
1908
1909 # Conditionalize the makefile for this target machine.
1910 tmake_file_=
1911 for f in ${tmake_file}
1912 do
1913         if test -f ${srcdir}/config/$f
1914         then
1915                 tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
1916         fi
1917 done
1918 tmake_file="${tmake_file_}"
1919
1920 out_object_file=`basename $out_file .c`.o
1921 common_out_object_file=`basename $common_out_file .c`.o
1922
1923 tm_file_list="options.h"
1924 tm_include_list="options.h insn-constants.h"
1925 for f in $tm_file; do
1926   case $f in
1927     ./* )
1928        f=`echo $f | sed 's/^..//'`
1929        tm_file_list="${tm_file_list} $f"
1930        tm_include_list="${tm_include_list} $f"
1931        ;;
1932     defaults.h )
1933        tm_file_list="${tm_file_list} \$(srcdir)/$f"
1934        tm_include_list="${tm_include_list} $f"
1935        ;;
1936     * )
1937        tm_file_list="${tm_file_list} \$(srcdir)/config/$f"
1938        tm_include_list="${tm_include_list} config/$f"
1939        ;;
1940   esac
1941 done
1942
1943 tm_p_file_list=
1944 tm_p_include_list=
1945 for f in $tm_p_file; do
1946   case $f in
1947     tm-preds.h )
1948        tm_p_file_list="${tm_p_file_list} $f"
1949        tm_p_include_list="${tm_p_include_list} $f"
1950        ;;
1951     * )
1952        tm_p_file_list="${tm_p_file_list} \$(srcdir)/config/$f"
1953        tm_p_include_list="${tm_p_include_list} config/$f"
1954   esac
1955 done
1956
1957 xm_file_list=
1958 xm_include_list=
1959 for f in $xm_file; do
1960   case $f in
1961     ansidecl.h )
1962        xm_file_list="${xm_file_list} \$(srcdir)/../include/$f"
1963        xm_include_list="${xm_include_list} $f"
1964        ;;
1965     auto-host.h )
1966        xm_file_list="${xm_file_list} $f"
1967        xm_include_list="${xm_include_list} $f"
1968        ;;
1969     * )
1970        xm_file_list="${xm_file_list} \$(srcdir)/config/$f"
1971        xm_include_list="${xm_include_list} config/$f"
1972        ;;
1973   esac
1974 done
1975
1976 host_xm_file_list=
1977 host_xm_include_list=
1978 for f in $host_xm_file; do
1979   case $f in
1980     ansidecl.h )
1981        host_xm_file_list="${host_xm_file_list} \$(srcdir)/../include/$f"
1982        host_xm_include_list="${host_xm_include_list} $f"
1983        ;;
1984     auto-host.h )
1985        host_xm_file_list="${host_xm_file_list} $f"
1986        host_xm_include_list="${host_xm_include_list} $f"
1987        ;;
1988     * )
1989        host_xm_file_list="${host_xm_file_list} \$(srcdir)/config/$f"
1990        host_xm_include_list="${host_xm_include_list} config/$f"
1991        ;;
1992   esac
1993 done
1994
1995 build_xm_file_list=
1996 for f in $build_xm_file; do
1997   case $f in
1998     ansidecl.h )
1999        build_xm_file_list="${build_xm_file_list} \$(srcdir)/../include/$f"
2000        build_xm_include_list="${build_xm_include_list} $f"
2001        ;;
2002     auto-build.h | auto-host.h )
2003        build_xm_file_list="${build_xm_file_list} $f"
2004        build_xm_include_list="${build_xm_include_list} $f"
2005        ;;
2006     * )
2007        build_xm_file_list="${build_xm_file_list} \$(srcdir)/config/$f"
2008        build_xm_include_list="${build_xm_include_list} config/$f"
2009        ;;
2010   esac
2011 done
2012
2013 # Define macro CROSS_DIRECTORY_STRUCTURE in compilation if this is a
2014 # cross-compiler which does not use the native headers and libraries.
2015 # Also use all.cross instead of all.internal and adjust SYSTEM_HEADER_DIR.
2016 CROSS=                                          AC_SUBST(CROSS)
2017 ALL=all.internal                                AC_SUBST(ALL)
2018 SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)' AC_SUBST(SYSTEM_HEADER_DIR)
2019 BUILD_SYSTEM_HEADER_DIR=$SYSTEM_HEADER_DIR      AC_SUBST(BUILD_SYSTEM_HEADER_DIR)
2020
2021 if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x ||
2022    test x$build != x$host || test "x$with_build_sysroot" != x; then
2023   if test "x$with_build_sysroot" != x; then
2024     BUILD_SYSTEM_HEADER_DIR=$with_build_sysroot'$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
2025   else
2026     BUILD_SYSTEM_HEADER_DIR='$(CROSS_SYSTEM_HEADER_DIR)'
2027   fi
2028
2029   if test x$host != x$target
2030   then
2031     CROSS="-DCROSS_DIRECTORY_STRUCTURE"
2032     ALL=all.cross
2033     SYSTEM_HEADER_DIR=$BUILD_SYSTEM_HEADER_DIR
2034   elif test "x$TARGET_SYSTEM_ROOT" != x; then
2035     SYSTEM_HEADER_DIR='$(CROSS_SYSTEM_HEADER_DIR)'
2036   fi
2037
2038   if test "x$with_build_sysroot" != "x"; then
2039     target_header_dir="${with_build_sysroot}${native_system_header_dir}"
2040   elif test "x$with_sysroot" = x; then
2041     target_header_dir="${test_exec_prefix}/${target_noncanonical}/sys-include"
2042   elif test "x$with_sysroot" = xyes; then
2043     target_header_dir="${test_exec_prefix}/${target_noncanonical}/sys-root${native_system_header_dir}"
2044   else
2045     target_header_dir="${with_sysroot}${native_system_header_dir}"
2046   fi
2047 else
2048   target_header_dir=${native_system_header_dir}
2049 fi
2050
2051 # If this is a cross-compiler that does not
2052 # have its own set of headers then define
2053 # inhibit_libc
2054
2055 # If this is using newlib, without having the headers available now,
2056 # then define inhibit_libc in LIBGCC2_CFLAGS.
2057 # This prevents libgcc2 from containing any code which requires libc
2058 # support.
2059 : ${inhibit_libc=false}
2060 if { { test x$host != x$target && test "x$with_sysroot" = x ; } ||
2061        test x$with_newlib = xyes ; } &&
2062      { test "x$with_headers" = xno || test ! -f "$target_header_dir/stdio.h"; } ; then
2063        inhibit_libc=true
2064 fi
2065 AC_SUBST(inhibit_libc)
2066
2067 # When building gcc with a cross-compiler, we need to adjust things so
2068 # that the generator programs are still built with the native compiler.
2069 # Also, we cannot run fixincludes.
2070
2071 # These are the normal (build=host) settings:
2072 CC_FOR_BUILD='$(CC)'            AC_SUBST(CC_FOR_BUILD)
2073 CXX_FOR_BUILD='$(CXX)'          AC_SUBST(CXX_FOR_BUILD)
2074 BUILD_CFLAGS='$(ALL_CFLAGS)'    AC_SUBST(BUILD_CFLAGS)
2075 BUILD_CXXFLAGS='$(ALL_CXXFLAGS)' AC_SUBST(BUILD_CXXFLAGS)
2076 BUILD_LDFLAGS='$(LDFLAGS)'      AC_SUBST(BUILD_LDFLAGS)
2077 STMP_FIXINC=stmp-fixinc         AC_SUBST(STMP_FIXINC)
2078
2079 BUILD_NO_PIE_CFLAGS='$(NO_PIE_CFLAGS)' AC_SUBST(BUILD_NO_PIE_CFLAGS)
2080 BUILD_NO_PIE_FLAG='$(NO_PIE_FLAG)' AC_SUBST(BUILD_NO_PIE_FLAG)
2081
2082 # And these apply if build != host, or we are generating coverage data
2083 if test x$build != x$host || test "x$coverage_flags" != x
2084 then
2085     BUILD_CFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS_FOR_BUILD)'
2086     BUILD_CXXFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CXXFLAGS_FOR_BUILD)'
2087     BUILD_LDFLAGS='$(LDFLAGS_FOR_BUILD)'
2088
2089     NO_PIE_CFLAGS_FOR_BUILD=${NO_PIE_CFLAGS_FOR_BUILD-${NO_PIE_CFLAGS}}
2090     NO_PIE_FLAG_FOR_BUILD=${NO_PIE_FLAG_FOR_BUILD-${NO_PIE_FLAG}}
2091     BUILD_NO_PIE_CFLAGS='$(NO_PIE_CFLAGS_FOR_BUILD)'
2092     BUILD_NO_PIE_FLAG='$(NO_PIE_FLAG_FOR_BUILD)'
2093 fi
2094 AC_SUBST(NO_PIE_CFLAGS_FOR_BUILD)
2095 AC_SUBST(NO_PIE_FLAG_FOR_BUILD)
2096
2097 # Expand extra_headers to include complete path.
2098 # This substitutes for lots of t-* files.
2099 extra_headers_list=
2100 # Prepend $(srcdir)/config/${cpu_type}/ to every entry in extra_headers.
2101 for file in ${extra_headers} ; do
2102   extra_headers_list="${extra_headers_list} \$(srcdir)/config/${cpu_type}/${file}"
2103 done
2104
2105 # If use_gcc_tgmath is set, append ginclude/tgmath.h.
2106 if test x"$use_gcc_tgmath" = xyes
2107 then extra_headers_list="${extra_headers_list} \$(srcdir)/ginclude/tgmath.h"
2108 fi
2109
2110 # Define collect2 in Makefile.
2111 case $host_can_use_collect2 in
2112   no) collect2= ;;
2113   *) collect2='collect2$(exeext)' ;;
2114 esac
2115 AC_SUBST([collect2])
2116
2117 # Add a definition of USE_COLLECT2 if system wants one.
2118 case $use_collect2 in
2119   no) use_collect2= ;;
2120   "") ;;
2121   *)
2122     host_xm_defines="${host_xm_defines} USE_COLLECT2"
2123     xm_defines="${xm_defines} USE_COLLECT2"
2124     case $host_can_use_collect2 in
2125       no)
2126         AC_MSG_ERROR([collect2 is required but cannot be built on this system])
2127         ;;
2128     esac
2129     ;;
2130 esac
2131
2132 AC_DEFINE_UNQUOTED(LTOPLUGINSONAME,"${host_lto_plugin_soname}",
2133 [Define to the name of the LTO plugin DSO that must be
2134   passed to the linker's -plugin=LIB option.])
2135
2136 # ---------------------------
2137 # Assembler & linker features
2138 # ---------------------------
2139
2140 # During stage 2, ld is actually gcc/collect-ld, which is a small script to
2141 # discern between when to use prev-ld/ld-new and when to use ld/ld-new.
2142 # However when ld-new is first executed from the build tree, libtool will
2143 # relink it as .libs/lt-ld-new, so that it can give it an RPATH that refers
2144 # to the build tree.  While doing this we need to use the previous-stage
2145 # linker, or we have an infinite loop.  The presence of a shell script as
2146 # ld/ld-new, and the fact that the script *uses ld itself*, is what confuses
2147 # the gcc/collect-ld script.  So we need to know how libtool works, or
2148 # exec-tool will fail.
2149
2150 m4_defun([_LT_CONFIG_COMMANDS], [])
2151 AC_PROG_LIBTOOL
2152 AC_SUBST(objdir)
2153 AC_SUBST(enable_fast_install)
2154
2155 # Identify the assembler which will work hand-in-glove with the newly
2156 # built GCC, so that we can examine its features.  This is the assembler
2157 # which will be driven by the driver program.
2158 #
2159 # If build != host, and we aren't building gas in-tree, we identify a
2160 # build->target assembler and hope that it will have the same features
2161 # as the host->target assembler we'll be using.
2162 gcc_cv_gas_major_version=
2163 gcc_cv_gas_minor_version=
2164 gcc_cv_as_gas_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gas
2165
2166 m4_pattern_allow([AS_FOR_TARGET])dnl
2167 AS_VAR_SET_IF(gcc_cv_as,, [
2168 if test -x "$DEFAULT_ASSEMBLER"; then
2169         gcc_cv_as="$DEFAULT_ASSEMBLER"
2170 elif test -f $gcc_cv_as_gas_srcdir/configure.ac \
2171      && test -f ../gas/Makefile \
2172      && test x$build = x$host; then
2173         gcc_cv_as=../gas/as-new$build_exeext
2174 elif test -x as$build_exeext; then
2175         # Build using assembler in the current directory.
2176         gcc_cv_as=./as$build_exeext
2177 elif ( set dummy $AS_FOR_TARGET; test -x $[2] ); then
2178         gcc_cv_as="$AS_FOR_TARGET"
2179 else
2180         AC_PATH_PROG(gcc_cv_as, $AS_FOR_TARGET)
2181 fi])
2182
2183 ORIGINAL_AS_FOR_TARGET=$gcc_cv_as
2184 AC_SUBST(ORIGINAL_AS_FOR_TARGET)
2185 case "$ORIGINAL_AS_FOR_TARGET" in
2186   ./as | ./as$build_exeext) ;;
2187   *) AC_CONFIG_FILES(as:exec-tool.in, [chmod +x as]) ;;
2188 esac
2189
2190 AC_MSG_CHECKING(what assembler to use)
2191 if test "$gcc_cv_as" = ../gas/as-new$build_exeext; then
2192   # Single tree build which includes gas.  We want to prefer it
2193   # over whatever linker top-level may have detected, since
2194   # we'll use what we're building after installation anyway.
2195   AC_MSG_RESULT(newly built gas)
2196   in_tree_gas=yes
2197   _gcc_COMPUTE_GAS_VERSION
2198   in_tree_gas_is_elf=no
2199   if grep 'obj_format = elf' ../gas/Makefile > /dev/null \
2200      || (grep 'obj_format = multi' ../gas/Makefile \
2201          && grep 'extra_objects =.* obj-elf' ../gas/Makefile) > /dev/null
2202   then
2203     in_tree_gas_is_elf=yes
2204   fi
2205 else
2206   AC_MSG_RESULT($gcc_cv_as)
2207   in_tree_gas=no
2208 fi
2209
2210 default_ld=
2211 AC_ARG_ENABLE(ld,
2212 [[  --enable-ld[=ARG]       build ld [ARG={default,yes,no}]]],
2213 [case "${enableval}" in
2214  no)
2215    default_ld=ld.gold
2216    ;;
2217  esac])
2218
2219 install_gold_as_default=no
2220 AC_ARG_ENABLE(gold,
2221 [[  --enable-gold[=ARG]     build gold [ARG={default,yes,no}]]],
2222 [case "${enableval}" in
2223  default)
2224    install_gold_as_default=yes
2225    ;;
2226  yes)
2227    if test x${default_ld} != x; then
2228      install_gold_as_default=yes
2229    fi
2230    ;;
2231  no)
2232    ;;
2233  *)
2234    AC_MSG_ERROR([invalid --enable-gold argument])
2235    ;;
2236  esac])
2237
2238 # Identify the linker which will work hand-in-glove with the newly
2239 # built GCC, so that we can examine its features.  This is the linker
2240 # which will be driven by the driver program.
2241 #
2242 # If build != host, and we aren't building gas in-tree, we identify a
2243 # build->target linker and hope that it will have the same features
2244 # as the host->target linker we'll be using.
2245 gcc_cv_gld_major_version=
2246 gcc_cv_gld_minor_version=
2247 gcc_cv_ld_gld_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/ld
2248 gcc_cv_ld_gold_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gold
2249 gcc_cv_ld_bfd_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/bfd
2250
2251 AS_VAR_SET_IF(gcc_cv_ld,, [
2252 if test -x "$DEFAULT_LINKER"; then
2253         gcc_cv_ld="$DEFAULT_LINKER"
2254 elif test $install_gold_as_default = yes \
2255      && test -f $gcc_cv_ld_gold_srcdir/configure.ac \
2256      && test -f ../gold/Makefile \
2257      && test x$build = x$host; then
2258         gcc_cv_ld=../gold/ld-new$build_exeext
2259 elif test -f $gcc_cv_ld_gld_srcdir/configure.ac \
2260      && test -f ../ld/Makefile \
2261      && test x$build = x$host; then
2262         gcc_cv_ld=../ld/ld-new$build_exeext
2263 elif test -x collect-ld$build_exeext; then
2264         # Build using linker in the current directory.
2265         gcc_cv_ld=./collect-ld$build_exeext
2266 elif ( set dummy $LD_FOR_TARGET; test -x $[2] ); then
2267         gcc_cv_ld="$LD_FOR_TARGET"
2268 else
2269         AC_PATH_PROG(gcc_cv_ld, $LD_FOR_TARGET)
2270 fi])
2271
2272 ORIGINAL_PLUGIN_LD_FOR_TARGET=$gcc_cv_ld
2273 PLUGIN_LD_SUFFIX=`basename $gcc_cv_ld | sed -e "s,$target_alias-,,"`
2274 # if the PLUGIN_LD is set ld-new, just have it as ld
2275 # as that is the installed named.
2276 if test x$PLUGIN_LD_SUFFIX = xld-new \
2277    || test x$PLUGIN_LD_SUFFIX = xcollect-ld ; then
2278   PLUGIN_LD_SUFFIX=ld
2279 fi
2280 AC_ARG_WITH(plugin-ld,
2281 [AS_HELP_STRING([[--with-plugin-ld=[ARG]]], [specify the plugin linker])],
2282 [if test x"$withval" != x; then
2283    ORIGINAL_PLUGIN_LD_FOR_TARGET="$withval"
2284    PLUGIN_LD_SUFFIX="$withval"
2285  fi])
2286 AC_SUBST(ORIGINAL_PLUGIN_LD_FOR_TARGET)
2287 AC_DEFINE_UNQUOTED(PLUGIN_LD_SUFFIX, "$PLUGIN_LD_SUFFIX", [Specify plugin linker])
2288
2289 # Check to see if we are using gold instead of ld
2290 AC_MSG_CHECKING(whether we are using gold)
2291 ld_is_gold=no
2292 if test x$gcc_cv_ld != x; then
2293   if $gcc_cv_ld --version 2>/dev/null | sed 1q \
2294      | grep "GNU gold" > /dev/null; then
2295     ld_is_gold=yes
2296   fi
2297 fi
2298 AC_MSG_RESULT($ld_is_gold)
2299
2300 AC_MSG_CHECKING(gold linker with split stack support as non default)
2301 # Check to see if default ld is not gold, but gold is
2302 # available and has support for split stack.  If gcc was configured
2303 # with gold then no checking is done.
2304 #
2305 if test x$ld_is_gold = xno && which ${gcc_cv_ld}.gold >/dev/null 2>&1; then
2306
2307 # For platforms other than powerpc64*, enable as appropriate.
2308
2309   gold_non_default=no
2310   ld_gold=`which ${gcc_cv_ld}.gold`
2311 # Make sure this gold has minimal split stack support
2312   if $ld_gold --help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
2313     ld_vers=`$ld_gold --version | sed 1q`
2314     gold_vers=`echo $ld_vers | sed -n \
2315           -e 's,^[[^)]]*[[  ]]\([[0-9]][[0-9]]*\.[[0-9]][[0-9]]*[[^)]]*\)) .*$,\1,p'`
2316     case $target in
2317 # check that the gold version contains the complete split stack support
2318 # on powerpc64 big and little endian
2319       powerpc64*-*-*)
2320         case "$gold_vers" in
2321           2.25.[[1-9]]*|2.2[[6-9]][[.0-9]]*|2.[[3-9]][[.0-9]]*|[[3-9]].[[.0-9]]*) gold_non_default=yes
2322           ;;
2323           *) gold_non_default=no
2324           ;;
2325         esac
2326         ;;
2327     esac
2328   fi
2329   if test $gold_non_default = yes; then
2330     AC_DEFINE(HAVE_GOLD_NON_DEFAULT_SPLIT_STACK, 1,
2331             [Define if the gold linker supports split stack and is available as a non-default])
2332   fi
2333 fi
2334 AC_MSG_RESULT($gold_non_default)
2335
2336 ORIGINAL_LD_FOR_TARGET=$gcc_cv_ld
2337 AC_SUBST(ORIGINAL_LD_FOR_TARGET)
2338 case "$ORIGINAL_LD_FOR_TARGET" in
2339   ./collect-ld | ./collect-ld$build_exeext) ;;
2340   *) AC_CONFIG_FILES(collect-ld:exec-tool.in, [chmod +x collect-ld]) ;;
2341 esac
2342
2343 AC_MSG_CHECKING(what linker to use)
2344 if test "$gcc_cv_ld" = ../ld/ld-new$build_exeext \
2345    || test "$gcc_cv_ld" = ../gold/ld-new$build_exeext; then
2346         # Single tree build which includes ld.  We want to prefer it
2347         # over whatever linker top-level may have detected, since
2348         # we'll use what we're building after installation anyway.
2349         AC_MSG_RESULT(newly built ld)
2350         in_tree_ld=yes
2351         in_tree_ld_is_elf=no
2352         if (grep 'EMUL = .*elf' ../ld/Makefile \
2353             || grep 'EMUL = .*linux' ../ld/Makefile \
2354             || grep 'EMUL = .*lynx' ../ld/Makefile) > /dev/null; then
2355           in_tree_ld_is_elf=yes
2356         elif test "$ld_is_gold" = yes; then
2357           in_tree_ld_is_elf=yes
2358         fi
2359         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
2360         do
2361 changequote(,)dnl
2362                 gcc_cv_gld_version=`sed -n -e 's/^[     ]*VERSION=[^0-9A-Za-z_]*\([0-9]*\.[0-9]*.*\)/VERSION=\1/p' < $f`
2363                 if test x$gcc_cv_gld_version != x; then
2364                         break
2365                 fi
2366         done
2367         case $gcc_cv_gld_version in
2368           VERSION=[0-9]*) ;;
2369 changequote([,])dnl
2370           *) AC_MSG_ERROR([[cannot find version of in-tree linker]]) ;;
2371 changequote(,)dnl
2372         esac
2373         gcc_cv_gld_major_version=`expr "$gcc_cv_gld_version" : "VERSION=\([0-9]*\)"`
2374         gcc_cv_gld_minor_version=`expr "$gcc_cv_gld_version" : "VERSION=[0-9]*\.\([0-9]*\)"`
2375 changequote([,])dnl
2376         ORIGINAL_LD_BFD_FOR_TARGET=../ld/ld-new$build_exeext
2377         ORIGINAL_LD_GOLD_FOR_TARGET=../gold/ld-new$build_exeext
2378 else
2379         AC_MSG_RESULT($gcc_cv_ld)
2380         in_tree_ld=no
2381         gcc_cvs_ld_program=`dirname $gcc_cv_ld`/`basename $gcc_cv_ld $host_exeext`
2382         ORIGINAL_LD_BFD_FOR_TARGET=${gcc_cvs_ld_program}.bfd$host_exeext
2383         ORIGINAL_LD_GOLD_FOR_TARGET=${gcc_cvs_ld_program}.gold$host_exeext
2384 fi
2385
2386 AC_SUBST(ORIGINAL_LD_BFD_FOR_TARGET)
2387 AC_SUBST(ORIGINAL_LD_GOLD_FOR_TARGET)
2388
2389 # Figure out what nm we will be using.
2390 gcc_cv_binutils_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/binutils
2391 AS_VAR_SET_IF(gcc_cv_nm,, [
2392 if test -f $gcc_cv_binutils_srcdir/configure.ac \
2393      && test -f ../binutils/Makefile \
2394      && test x$build = x$host; then
2395         gcc_cv_nm=../binutils/nm-new$build_exeext
2396 elif test -x nm$build_exeext; then
2397         gcc_cv_nm=./nm$build_exeext
2398 elif ( set dummy $NM_FOR_TARGET; test -x $[2] ); then
2399         gcc_cv_nm="$NM_FOR_TARGET"
2400 else
2401         AC_PATH_PROG(gcc_cv_nm, $NM_FOR_TARGET)
2402 fi])
2403
2404 AC_MSG_CHECKING(what nm to use)
2405 if test "$gcc_cv_nm" = ../binutils/nm-new$build_exeext; then
2406         # Single tree build which includes binutils.
2407         AC_MSG_RESULT(newly built nm)
2408         in_tree_nm=yes
2409 else
2410         AC_MSG_RESULT($gcc_cv_nm)
2411         in_tree_nm=no
2412 fi
2413
2414 ORIGINAL_NM_FOR_TARGET=$gcc_cv_nm
2415 AC_SUBST(ORIGINAL_NM_FOR_TARGET)
2416 case "$ORIGINAL_NM_FOR_TARGET" in
2417   ./nm | ./nm$build_exeext) ;;
2418   *) AC_CONFIG_FILES(nm:exec-tool.in, [chmod +x nm]) ;;
2419 esac
2420
2421
2422 # Figure out what objdump we will be using.
2423 AS_VAR_SET_IF(gcc_cv_objdump,, [
2424 if test -f $gcc_cv_binutils_srcdir/configure.ac \
2425      && test -f ../binutils/Makefile \
2426      && test x$build = x$host; then
2427         # Single tree build which includes binutils.
2428         gcc_cv_objdump=../binutils/objdump$build_exeext
2429 elif test -x objdump$build_exeext; then
2430         gcc_cv_objdump=./objdump$build_exeext
2431 elif ( set dummy $OBJDUMP_FOR_TARGET; test -x $[2] ); then
2432         gcc_cv_objdump="$OBJDUMP_FOR_TARGET"
2433 else
2434         AC_PATH_PROG(gcc_cv_objdump, $OBJDUMP_FOR_TARGET)
2435 fi])
2436
2437 AC_MSG_CHECKING(what objdump to use)
2438 if test "$gcc_cv_objdump" = ../binutils/objdump$build_exeext; then
2439         # Single tree build which includes binutils.
2440         AC_MSG_RESULT(newly built objdump)
2441 elif test x$gcc_cv_objdump = x; then
2442         AC_MSG_RESULT(not found)
2443 else
2444         AC_MSG_RESULT($gcc_cv_objdump)
2445 fi
2446
2447 # Figure out what readelf we will be using.
2448 AS_VAR_SET_IF(gcc_cv_readelf,, [
2449 if test -f $gcc_cv_binutils_srcdir/configure.ac \
2450      && test -f ../binutils/Makefile \
2451      && test x$build = x$host; then
2452         # Single tree build which includes binutils.
2453         gcc_cv_readelf=../binutils/readelf$build_exeext
2454 elif test -x readelf$build_exeext; then
2455         gcc_cv_readelf=./readelf$build_exeext
2456 elif ( set dummy $READELF_FOR_TARGET; test -x $[2] ); then
2457         gcc_cv_readelf="$READELF_FOR_TARGET"
2458 else
2459         AC_PATH_PROG(gcc_cv_readelf, $READELF_FOR_TARGET)
2460 fi])
2461
2462 AC_MSG_CHECKING(what readelf to use)
2463 if test "$gcc_cv_readelf" = ../binutils/readelf$build_exeext; then
2464         # Single tree build which includes binutils.
2465         AC_MSG_RESULT(newly built readelf)
2466 elif test x$gcc_cv_readelf = x; then
2467         AC_MSG_RESULT(not found)
2468 else
2469         AC_MSG_RESULT($gcc_cv_readelf)
2470 fi
2471
2472 # Figure out what assembler alignment features are present.
2473 gcc_GAS_CHECK_FEATURE([.balign and .p2align], gcc_cv_as_balign_and_p2align,
2474  [2,6,0],,
2475 [.balign 4
2476 .p2align 2],,
2477 [AC_DEFINE(HAVE_GAS_BALIGN_AND_P2ALIGN, 1,
2478   [Define if your assembler supports .balign and .p2align.])])
2479
2480 gcc_GAS_CHECK_FEATURE([.p2align with maximum skip], gcc_cv_as_max_skip_p2align,
2481  [2,8,0],,
2482  [.p2align 4,,7],,
2483 [AC_DEFINE(HAVE_GAS_MAX_SKIP_P2ALIGN, 1,
2484   [Define if your assembler supports specifying the maximum number
2485    of bytes to skip when using the GAS .p2align command.])])
2486
2487 gcc_GAS_CHECK_FEATURE([.literal16], gcc_cv_as_literal16,
2488  [2,8,0],,
2489  [.literal16],,
2490 [AC_DEFINE(HAVE_GAS_LITERAL16, 1,
2491   [Define if your assembler supports .literal16.])])
2492
2493 gcc_GAS_CHECK_FEATURE([working .subsection -1], gcc_cv_as_subsection_m1,
2494  [elf,2,9,0],,
2495  [conftest_label1: .word 0
2496 .subsection -1
2497 conftest_label2: .word 0
2498 .previous],
2499  [if test x$gcc_cv_nm != x; then
2500     $gcc_cv_nm conftest.o | grep conftest_label1 > conftest.nm1
2501     $gcc_cv_nm conftest.o | grep conftest_label2 | sed -e 's/label2/label1/' > conftest.nm2
2502     if cmp conftest.nm1 conftest.nm2 > /dev/null 2>&1
2503     then :
2504     else gcc_cv_as_subsection_m1=yes
2505     fi
2506     rm -f conftest.nm1 conftest.nm2
2507   fi],
2508  [AC_DEFINE(HAVE_GAS_SUBSECTION_ORDERING, 1,
2509   [Define if your assembler supports .subsection and .subsection -1 starts
2510    emitting at the beginning of your section.])])
2511
2512 gcc_GAS_CHECK_FEATURE([.weak], gcc_cv_as_weak,
2513  [2,2,0],,
2514  [      .weak foobar],,
2515 [AC_DEFINE(HAVE_GAS_WEAK, 1, [Define if your assembler supports .weak.])])
2516
2517 gcc_GAS_CHECK_FEATURE([.weakref], gcc_cv_as_weakref,
2518  [2,17,0],,
2519  [      .weakref foobar, barfnot],,
2520 [AC_DEFINE(HAVE_GAS_WEAKREF, 1, [Define if your assembler supports .weakref.])])
2521
2522 gcc_GAS_CHECK_FEATURE([.nsubspa comdat], gcc_cv_as_nsubspa_comdat,
2523  [2,15,91],,
2524  [      .SPACE $TEXT$
2525         .NSUBSPA $CODE$,COMDAT],,
2526 [AC_DEFINE(HAVE_GAS_NSUBSPA_COMDAT, 1, [Define if your assembler supports .nsubspa comdat option.])])
2527
2528 # .hidden needs to be supported in both the assembler and the linker,
2529 # because GNU LD versions before 2.12.1 have buggy support for STV_HIDDEN.
2530 # This is irritatingly difficult to feature test for; we have to check the
2531 # date string after the version number.  If we've got an in-tree
2532 # ld, we don't know its patchlevel version, so we set the baseline at 2.13
2533 # to be safe.
2534 # The gcc_GAS_CHECK_FEATURE call just sets a cache variable.
2535 case "${target}" in
2536   *-*-aix*)
2537     conftest_s='        .globl foobar,hidden'
2538     ;;
2539   *)
2540     conftest_s='        .hidden foobar
2541 foobar:'
2542     ;;
2543 esac
2544 gcc_GAS_CHECK_FEATURE([.hidden], gcc_cv_as_hidden,
2545  [elf,2,13,0],, [$conftest_s])
2546 case "${target}" in
2547   *-*-darwin*)
2548     # Darwin as has some visibility support, though with a different syntax.
2549     gcc_cv_as_hidden=yes
2550     ;;
2551 esac
2552
2553 # gnu_indirect_function type is an extension proposed at
2554 # http://groups.google/com/group/generic-abi/files. It allows dynamic runtime
2555 # selection of function implementation
2556 AC_ARG_ENABLE(gnu-indirect-function,
2557  [AS_HELP_STRING([--enable-gnu-indirect-function],
2558                  [enable the use of the @gnu_indirect_function to glibc systems])],
2559  [case $enable_gnu_indirect_function in
2560     yes | no) ;;
2561     *) AC_MSG_ERROR(['$enable_gnu_indirect_function' is an invalid value for --enable-gnu-indirect-function.
2562 Valid choices are 'yes' and 'no'.]) ;;
2563   esac],
2564  [enable_gnu_indirect_function="$default_gnu_indirect_function"])
2565
2566 gif=`if test x$enable_gnu_indirect_function = xyes; then echo 1; else echo 0; fi`
2567 AC_DEFINE_UNQUOTED(HAVE_GNU_INDIRECT_FUNCTION, $gif,
2568 [Define if your system supports gnu indirect functions.])
2569
2570
2571 changequote(,)dnl
2572 if test $in_tree_ld != yes ; then
2573   ld_ver=`$gcc_cv_ld --version 2>/dev/null | sed 1q`
2574   if echo "$ld_ver" | grep GNU > /dev/null; then
2575     if test x"$ld_is_gold" = xyes; then
2576       # GNU gold --version looks like this:
2577       #
2578       # GNU gold (GNU Binutils 2.21.51.20110225) 1.11
2579       #
2580       # We extract the binutils version which is more familiar and specific
2581       # than the gold version.
2582       ld_vers=`echo $ld_ver | sed -n \
2583           -e 's,^[^)]*[  ]\([0-9][0-9]*\.[0-9][0-9]*[^)]*\)) .*$,\1,p'`
2584     else
2585       # GNU ld --version looks like this:
2586       #
2587       # GNU ld (GNU Binutils) 2.21.51.20110225
2588       ld_vers=`echo $ld_ver | sed -n \
2589           -e 's,^.*[     ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2590     fi
2591     ld_date=`echo $ld_ver | sed -n 's,^.*\([2-9][0-9][0-9][0-9]\)[-]*\([01][0-9]\)[-]*\([0-3][0-9]\).*$,\1\2\3,p'`
2592     ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2593     ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2594     ld_vers_patch=`expr "$ld_vers" : '[0-9]*\.[0-9]*\.\([0-9]*\)'`
2595   else
2596     case "${target}" in
2597       *-*-solaris2*)
2598         # Solaris 2 ld -V output looks like this for a regular version:
2599         #
2600         # ld: Software Generation Utilities - Solaris Link Editors: 5.11-1.1699
2601         #
2602         # but test versions add stuff at the end:
2603         #
2604         # ld: Software Generation Utilities - Solaris Link Editors: 5.11-1.1701:onnv-ab196087-6931056-03/25/10
2605         #
2606         # In Solaris 11.4, this was changed to
2607         #
2608         # ld: Solaris ELF Utilities: 11.4-1.3123
2609         #
2610         # ld and ld.so.1 are guaranteed to be updated in lockstep, so ld version
2611         # numbers can be used in ld.so.1 feature checks even if a different
2612         # linker is configured.
2613         ld_ver=`$gcc_cv_ld -V 2>&1`
2614         if echo "$ld_ver" | $EGREP 'Solaris Link Editors|Solaris ELF Utilities' > /dev/null; then
2615           ld_vers=`echo $ld_ver | sed -n \
2616             -e 's,^.*: \(5\|1[0-9]\)\.[0-9][0-9]*-\([0-9]\.[0-9][0-9]*\).*$,\2,p'`
2617           ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2618           ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2619         fi
2620         ;;
2621     esac
2622   fi
2623 fi
2624 changequote([,])dnl
2625
2626 AC_CACHE_CHECK(linker for .hidden support, gcc_cv_ld_hidden,
2627 [[if test $in_tree_ld = yes ; then
2628   gcc_cv_ld_hidden=no
2629   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 13 -o "$gcc_cv_gld_major_version" -gt 2 \
2630      && test $in_tree_ld_is_elf = yes; then
2631      gcc_cv_ld_hidden=yes
2632   fi
2633 else
2634   gcc_cv_ld_hidden=yes
2635   if test x"$ld_is_gold" = xyes; then
2636     :
2637   elif echo "$ld_ver" | grep GNU > /dev/null; then
2638     case "${target}" in
2639       mmix-knuth-mmixware)
2640         # The linker emits by default mmo, not ELF, so "no" is appropriate.
2641         gcc_cv_ld_hidden=no
2642         ;;
2643     esac
2644     if test 0"$ld_date" -lt 20020404; then
2645       if test -n "$ld_date"; then
2646         # If there was date string, but was earlier than 2002-04-04, fail
2647         gcc_cv_ld_hidden=no
2648       elif test -z "$ld_vers"; then
2649         # If there was no date string nor ld version number, something is wrong
2650         gcc_cv_ld_hidden=no
2651       else
2652         test -z "$ld_vers_patch" && ld_vers_patch=0
2653         if test "$ld_vers_major" -lt 2; then
2654           gcc_cv_ld_hidden=no
2655         elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 12; then
2656           gcc_cv_ld_hidden="no"
2657         elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 12 -a "$ld_vers_patch" -eq 0; then
2658           gcc_cv_ld_hidden=no
2659         fi
2660       fi
2661     fi
2662   else
2663     case "${target}" in
2664       *-*-aix[789]*)
2665         gcc_cv_ld_hidden=yes
2666         ;;
2667       *-*-darwin*)
2668         # Darwin ld has some visibility support.
2669         gcc_cv_ld_hidden=yes
2670         ;;
2671       hppa64*-*-hpux* | ia64*-*-hpux*)
2672         gcc_cv_ld_hidden=yes
2673         ;;
2674       *-*-solaris2.1[0-9]*)
2675         # Support for .hidden in Sun ld appeared in Solaris 9 FCS, but
2676         # .symbolic was only added in Solaris 9 12/02.
2677         gcc_cv_ld_hidden=yes
2678         ;;
2679       *)
2680         gcc_cv_ld_hidden=no
2681         ;;
2682     esac
2683   fi
2684 fi]])
2685 libgcc_visibility=no
2686 AC_SUBST(libgcc_visibility)
2687 GCC_TARGET_TEMPLATE([HAVE_GAS_HIDDEN])
2688 if test $gcc_cv_as_hidden = yes && test $gcc_cv_ld_hidden = yes; then
2689   libgcc_visibility=yes
2690   AC_DEFINE(HAVE_GAS_HIDDEN, 1,
2691   [Define if your assembler and linker support .hidden.])
2692 fi
2693
2694 AC_MSG_CHECKING(linker read-only and read-write section mixing)
2695 gcc_cv_ld_ro_rw_mix=unknown
2696 if test $in_tree_ld = yes ; then
2697   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2 \
2698      && test $in_tree_ld_is_elf = yes; then
2699     gcc_cv_ld_ro_rw_mix=read-write
2700   fi
2701 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
2702   echo '.section myfoosect, "a"' > conftest1.s
2703   echo '.section myfoosect, "aw"' > conftest2.s
2704   echo '.byte 1' >> conftest2.s
2705   echo '.section myfoosect, "a"' > conftest3.s
2706   echo '.byte 0' >> conftest3.s
2707   if $gcc_cv_as -o conftest1.o conftest1.s > /dev/null 2>&1 \
2708      && $gcc_cv_as -o conftest2.o conftest2.s > /dev/null 2>&1 \
2709      && $gcc_cv_as -o conftest3.o conftest3.s > /dev/null 2>&1 \
2710      && $gcc_cv_ld -shared -o conftest1.so conftest1.o \
2711         conftest2.o conftest3.o > /dev/null 2>&1; then
2712     gcc_cv_ld_ro_rw_mix=`$gcc_cv_objdump -h conftest1.so \
2713                          | sed -e '/myfoosect/!d' -e N`
2714     if echo "$gcc_cv_ld_ro_rw_mix" | grep CONTENTS > /dev/null; then
2715       if echo "$gcc_cv_ld_ro_rw_mix" | grep READONLY > /dev/null; then
2716         gcc_cv_ld_ro_rw_mix=read-only
2717       else
2718         gcc_cv_ld_ro_rw_mix=read-write
2719       fi
2720     fi
2721   fi
2722 changequote(,)dnl
2723   rm -f conftest.* conftest[123].*
2724 changequote([,])dnl
2725 fi
2726 if test x$gcc_cv_ld_ro_rw_mix = xread-write; then
2727         AC_DEFINE(HAVE_LD_RO_RW_SECTION_MIXING, 1,
2728   [Define if your linker links a mix of read-only
2729    and read-write sections into a read-write section.])
2730 fi
2731 AC_MSG_RESULT($gcc_cv_ld_ro_rw_mix)
2732
2733 gcc_AC_INITFINI_ARRAY
2734
2735 # Check if we have .[us]leb128, and support symbol arithmetic with it.
2736 gcc_GAS_CHECK_FEATURE([.sleb128 and .uleb128], gcc_cv_as_leb128,
2737   [elf,2,11,0],,
2738 [       .data
2739         .uleb128 L2 - L1
2740 L1:
2741         .uleb128 1280
2742         .sleb128 -1010
2743 L2:],
2744 [[# GAS versions before 2.11 do not support uleb128,
2745   # despite appearing to.
2746   # ??? There exists an elf-specific test that will crash
2747   # the assembler.  Perhaps it's better to figure out whether
2748   # arbitrary sections are supported and try the test.
2749   as_ver=`$gcc_cv_as --version 2>/dev/null | sed 1q`
2750   if echo "$as_ver" | grep GNU > /dev/null; then
2751     as_vers=`echo $as_ver | sed -n \
2752         -e 's,^.*[       ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2753     as_major=`expr "$as_vers" : '\([0-9]*\)'`
2754     as_minor=`expr "$as_vers" : '[0-9]*\.\([0-9]*\)'`
2755     if test $as_major -eq 2 && test $as_minor -lt 11
2756     then :
2757     else gcc_cv_as_leb128=yes
2758     fi
2759   fi]],
2760   [AC_DEFINE(HAVE_AS_LEB128, 1,
2761     [Define if your assembler supports .sleb128 and .uleb128.])],
2762   [AC_DEFINE(HAVE_AS_LEB128, 0,
2763     [Define if your assembler supports .sleb128 and .uleb128.])])
2764
2765 # Determine if an .eh_frame section is read-only.
2766 gcc_fn_eh_frame_ro () {
2767   $gcc_cv_as $1 -o conftest.o conftest.s > /dev/null 2>&1 && \
2768     $gcc_cv_objdump -h conftest.o 2>/dev/null | \
2769     sed -e '/.eh_frame/!d' -e N | grep READONLY > /dev/null
2770 }
2771
2772 # Check if we have assembler support for unwind directives.
2773 gcc_GAS_CHECK_FEATURE([cfi directives], gcc_cv_as_cfi_directive,
2774   ,,
2775 [       .text
2776         .cfi_startproc
2777         .cfi_offset 0, 0
2778         .cfi_same_value 1
2779         .cfi_def_cfa 1, 2
2780         .cfi_escape 1, 2, 3, 4, 5
2781         .cfi_endproc],
2782 [case "$target" in
2783   *-*-solaris*)
2784     # If the linker used on Solaris (like Sun ld) isn't capable of merging
2785     # read-only and read-write sections, we need to make sure that the
2786     # assembler used emits read-write .eh_frame sections.
2787     if test "x$gcc_cv_ld_ro_rw_mix" = xread-write; then
2788       gcc_cv_as_cfi_directive=yes
2789     elif test "x$gcc_cv_objdump" = x; then
2790       # No objdump, err on the side of caution.
2791       gcc_cv_as_cfi_directive=no
2792     else
2793       if test x$gas = xyes; then
2794         as_32_opt="--32"
2795         as_64_opt="--64"
2796       else
2797         as_32_opt="-m32"
2798         as_64_opt="-m64"
2799       fi
2800       case "$target" in
2801         sparc*-*-solaris2.*)
2802           # On Solaris/SPARC, .eh_frame sections should always be read-write.
2803           if gcc_fn_eh_frame_ro $as_32_opt \
2804              || gcc_fn_eh_frame_ro $as_64_opt; then
2805             gcc_cv_as_cfi_directive=no
2806           else
2807             gcc_cv_as_cfi_directive=yes
2808           fi
2809           ;;
2810         i?86-*-solaris2.* | x86_64-*-solaris2.*)
2811           # On Solaris/x86, make sure that GCC and assembler agree on using
2812           # read-only .eh_frame sections for 64-bit.
2813           if gcc_fn_eh_frame_ro $as_32_opt; then
2814             gcc_cv_as_cfi_directive=no
2815           elif gcc_fn_eh_frame_ro $as_64_opt; then
2816             gcc_cv_as_cfi_directive=yes
2817           else
2818             gcc_cv_as_cfi_directive=no
2819           fi
2820           ;;
2821       esac
2822     fi
2823     ;;
2824   *-*-*)
2825     gcc_cv_as_cfi_directive=yes
2826     ;;
2827 esac])
2828 if test $gcc_cv_as_cfi_directive = yes && test x$gcc_cv_objdump != x; then
2829 gcc_GAS_CHECK_FEATURE([working cfi advance], gcc_cv_as_cfi_advance_working,
2830   ,,
2831 [       .text
2832         .cfi_startproc
2833         .cfi_adjust_cfa_offset 64
2834         .skip 75040, 0
2835         .cfi_adjust_cfa_offset 128
2836         .cfi_endproc],
2837 [[
2838 if $gcc_cv_objdump -Wf conftest.o 2>/dev/null \
2839     | grep 'DW_CFA_advance_loc[24]:[    ][      ]*75040[        ]' >/dev/null; then
2840    gcc_cv_as_cfi_advance_working=yes
2841 fi
2842 ]])
2843 else
2844   # no objdump, err on the side of caution
2845   gcc_cv_as_cfi_advance_working=no
2846 fi
2847 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_DIRECTIVE)
2848 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_DIRECTIVE,
2849   [`if test $gcc_cv_as_cfi_directive = yes \
2850        && test $gcc_cv_as_cfi_advance_working = yes; then echo 1; else echo 0; fi`],
2851   [Define 0/1 if your assembler supports CFI directives.])
2852
2853 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE)
2854 gcc_GAS_CHECK_FEATURE([cfi personality directive],
2855   gcc_cv_as_cfi_personality_directive, ,,
2856 [       .text
2857         .cfi_startproc
2858         .cfi_personality 0, symbol
2859         .cfi_endproc])
2860 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE,
2861   [`if test $gcc_cv_as_cfi_personality_directive = yes;
2862     then echo 1; else echo 0; fi`],
2863   [Define 0/1 if your assembler supports .cfi_personality.])
2864
2865 gcc_GAS_CHECK_FEATURE([cfi sections directive],
2866   gcc_cv_as_cfi_sections_directive, ,,
2867 [       .text
2868         .cfi_sections .debug_frame, .eh_frame
2869         .cfi_startproc
2870         .cfi_endproc],
2871 [case $target_os in
2872   win32 | pe | cygwin* | mingw32*)
2873     # Need to check that we generated the correct relocation for the
2874     # .debug_frame section.  This was fixed for binutils 2.21.
2875     gcc_cv_as_cfi_sections_directive=no
2876     if test "x$gcc_cv_objdump" != x; then
2877      if $gcc_cv_objdump -j .debug_frame -r conftest.o 2>/dev/null | \
2878         grep secrel > /dev/null; then
2879       gcc_cv_as_cfi_sections_directive=yes
2880      fi
2881     fi
2882     ;;
2883   *)
2884     gcc_cv_as_cfi_sections_directive=yes
2885     ;;
2886 esac])
2887 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_SECTIONS_DIRECTIVE)
2888 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_SECTIONS_DIRECTIVE,
2889   [`if test $gcc_cv_as_cfi_sections_directive = yes;
2890     then echo 1; else echo 0; fi`],
2891   [Define 0/1 if your assembler supports .cfi_sections.])
2892
2893 # GAS versions up to and including 2.11.0 may mis-optimize
2894 # .eh_frame data.
2895 gcc_GAS_CHECK_FEATURE(eh_frame optimization, gcc_cv_as_eh_frame,
2896   [elf,2,12,0],,
2897 [       .text
2898 .LFB1:
2899         .4byte  0
2900 .L1:
2901         .4byte  0
2902 .LFE1:
2903         .section        .eh_frame,"aw",@progbits
2904 __FRAME_BEGIN__:
2905         .4byte  .LECIE1-.LSCIE1
2906 .LSCIE1:
2907         .4byte  0x0
2908         .byte   0x1
2909         .ascii "z\0"
2910         .byte   0x1
2911         .byte   0x78
2912         .byte   0x1a
2913         .byte   0x0
2914         .byte   0x4
2915         .4byte  1
2916         .p2align 1
2917 .LECIE1:
2918 .LSFDE1:
2919         .4byte  .LEFDE1-.LASFDE1
2920 .LASFDE1:
2921         .4byte  .LASFDE1-__FRAME_BEGIN__
2922         .4byte  .LFB1
2923         .4byte  .LFE1-.LFB1
2924         .byte   0x4
2925         .4byte  .LFE1-.LFB1
2926         .byte   0x4
2927         .4byte  .L1-.LFB1
2928 .LEFDE1:],
2929 [  dnl # For autoconf 2.5x, must protect trailing spaces with @&t@.
2930 cat > conftest.lit <<EOF
2931  0000 10000000 00000000 017a0001 781a0004  .........z..x...
2932  0010 01000000 12000000 18000000 00000000  ................
2933  0020 08000000 04080000 0044               .........D      @&t@
2934 EOF
2935 cat > conftest.big <<EOF
2936  0000 00000010 00000000 017a0001 781a0004  .........z..x...
2937  0010 00000001 00000012 00000018 00000000  ................
2938  0020 00000008 04000000 0844               .........D      @&t@
2939 EOF
2940   # If the assembler didn't choke, and we can objdump,
2941   # and we got the correct data, then succeed.
2942   # The text in the here-document typically retains its unix-style line
2943   # endings, while the output of objdump will use host line endings.
2944   # Therefore, use diff -b for the comparisons.
2945   if test x$gcc_cv_objdump != x \
2946   && $gcc_cv_objdump -s -j .eh_frame conftest.o 2>/dev/null \
2947      | tail -3 > conftest.got \
2948   && { diff -b conftest.lit conftest.got > /dev/null 2>&1 \
2949     || diff -b conftest.big conftest.got > /dev/null 2>&1; }
2950   then
2951     gcc_cv_as_eh_frame=yes
2952   elif AC_TRY_COMMAND($gcc_cv_as -o conftest.o --traditional-format /dev/null); then
2953     gcc_cv_as_eh_frame=buggy
2954   else
2955     # Uh oh, what do we do now?
2956     gcc_cv_as_eh_frame=no
2957   fi])
2958
2959 if test $gcc_cv_as_eh_frame = buggy; then
2960   AC_DEFINE(USE_AS_TRADITIONAL_FORMAT, 1,
2961   [Define if your assembler mis-optimizes .eh_frame data.])
2962 fi
2963
2964 # Test if the assembler supports the section flag 'e' or #exclude for
2965 # specifying an excluded section.
2966 gcc_GAS_CHECK_FEATURE([section exclude flag], gcc_cv_as_section_exclude_e,
2967  [2,22,51], [--fatal-warnings],
2968  [.section foo1,"e"
2969   .byte 0,0,0,0])
2970 if test $gcc_cv_as_section_exclude_e = no; then
2971   case "${target}" in
2972     # Solaris as uses #exclude instead.
2973     *-*-solaris2*)
2974       case "${target}" in
2975         sparc*-*-solaris2*)
2976           conftest_s='.section "foo1", #exclude'
2977           ;;
2978         i?86-*-solaris2* | x86_64-*-solaris2*)
2979           conftest_s='.section foo1, #exclude'
2980           ;;
2981       esac
2982       ;;
2983     esac
2984   gcc_GAS_CHECK_FEATURE([section exclude flag], gcc_cv_as_section_exclude_hash,,,
2985     [$conftest_s
2986      .byte 0,0,0,0])
2987 fi
2988 AC_DEFINE_UNQUOTED(HAVE_GAS_SECTION_EXCLUDE,
2989   [`if test $gcc_cv_as_section_exclude_e = yes || test $gcc_cv_as_section_exclude_hash = yes; then echo 1; else echo 0; fi`],
2990 [Define if your assembler supports specifying the exclude section flag.])
2991
2992 gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2993  [elf,2,12,0], [--fatal-warnings],
2994  [.section .rodata.str, "aMS", @progbits, 1])
2995 if test $gcc_cv_as_shf_merge = no; then
2996   gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2997     [elf,2,12,0], [--fatal-warnings],
2998     [.section .rodata.str, "aMS", %progbits, 1])
2999 fi
3000 case "$target" in
3001   i?86-*-solaris2.10* | x86_64-*-solaris2.10*)
3002     # SHF_MERGE support in Solaris 10/x86 ld is broken.
3003     if test x"$gnu_ld" = xno; then
3004       gcc_cv_as_shf_merge=no
3005     fi
3006     ;;
3007 esac
3008 AC_DEFINE_UNQUOTED(HAVE_GAS_SHF_MERGE,
3009   [`if test $gcc_cv_as_shf_merge = yes; then echo 1; else echo 0; fi`],
3010 [Define 0/1 if your assembler supports marking sections with SHF_MERGE flag.])
3011
3012 gcc_GAS_CHECK_FEATURE([stabs directive], gcc_cv_as_stabs_directive, ,,
3013 [.stabs "gcc2_compiled.",60,0,0,0],,
3014 [AC_DEFINE(HAVE_AS_STABS_DIRECTIVE, 1,
3015   [Define if your assembler supports .stabs.])])
3016
3017 gcc_GAS_CHECK_FEATURE([COMDAT group support (GNU as)],
3018  gcc_cv_as_comdat_group,
3019  [elf,2,16,0], [--fatal-warnings],
3020  [.section .text,"axG",@progbits,.foo,comdat])
3021 if test $gcc_cv_as_comdat_group = yes; then
3022   gcc_cv_as_comdat_group_percent=no
3023   gcc_cv_as_comdat_group_group=no
3024 else
3025  gcc_GAS_CHECK_FEATURE([COMDAT group support (GNU as, %type)],
3026    gcc_cv_as_comdat_group_percent,
3027    [elf,2,16,0], [--fatal-warnings],
3028    [.section .text,"axG",%progbits,.foo,comdat])
3029  if test $gcc_cv_as_comdat_group_percent = yes; then
3030    gcc_cv_as_comdat_group_group=no
3031  else
3032    case "${target}" in
3033      # Sun as uses a completely different syntax.
3034      *-*-solaris2*)
3035        case "${target}" in
3036          sparc*-*-solaris2*)
3037            conftest_s='
3038                .group foo,".text%foo",#comdat
3039                .section ".text%foo", #alloc,#execinstr,#progbits
3040                .globl foo
3041              foo:
3042              '
3043            ;;
3044          i?86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
3045            conftest_s='
3046                .group foo,.text%foo,#comdat
3047                .section .text%foo, "ax", @progbits
3048                .globl  foo
3049              foo:
3050              '
3051            ;;
3052        esac
3053        gcc_GAS_CHECK_FEATURE([COMDAT group support (Sun as, .group)],
3054          gcc_cv_as_comdat_group_group,
3055          ,, [$conftest_s])
3056        ;;
3057    esac
3058    if test -z "${gcc_cv_as_comdat_group_group+set}"; then
3059      gcc_cv_as_comdat_group_group=no
3060    fi
3061  fi
3062 fi
3063 if test x"$ld_is_gold" = xyes; then
3064   comdat_group=yes
3065 elif test $in_tree_ld = yes ; then
3066   comdat_group=no
3067   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
3068      && test $in_tree_ld_is_elf = yes; then
3069      comdat_group=yes
3070   fi
3071 elif echo "$ld_ver" | grep GNU > /dev/null; then
3072   comdat_group=yes
3073   if test 0"$ld_date" -lt 20050308; then
3074     if test -n "$ld_date"; then
3075       # If there was date string, but was earlier than 2005-03-08, fail
3076       comdat_group=no
3077     elif test "$ld_vers_major" -lt 2; then
3078       comdat_group=no
3079     elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
3080       comdat_group=no
3081     fi
3082   fi
3083 else
3084 changequote(,)dnl
3085   case "${target}" in
3086     *-*-solaris2.1[1-9]*)
3087       comdat_group=no
3088       # Sun ld has COMDAT group support since Solaris 9, but it doesn't
3089       # interoperate with GNU as until Solaris 11 build 130, i.e. ld
3090       # version 1.688.
3091       #
3092       # If using Sun as for COMDAT group as emitted by GCC, one needs at
3093       # least ld version 1.2267.
3094       if test "$ld_vers_major" -gt 1; then
3095         comdat_group=yes
3096       elif test "x$gas_flag" = xyes && test "$ld_vers_minor" -ge 1688; then
3097         comdat_group=yes
3098       elif test "$ld_vers_minor" -ge 2267; then
3099         comdat_group=yes
3100       fi
3101       ;;
3102     *)
3103       # Assume linkers other than GNU ld don't support COMDAT group.
3104       comdat_group=no
3105       ;;
3106   esac
3107 changequote([,])dnl
3108 fi
3109 # Allow overriding the automatic COMDAT group tests above.
3110 AC_ARG_ENABLE(comdat,
3111   [AS_HELP_STRING([--enable-comdat], [enable COMDAT group support])],
3112   [comdat_group="$enable_comdat"])
3113 if test $comdat_group = no; then
3114   gcc_cv_as_comdat_group=no
3115   gcc_cv_as_comdat_group_percent=no
3116   gcc_cv_as_comdat_group_group=no
3117 fi
3118 AC_DEFINE_UNQUOTED(HAVE_COMDAT_GROUP,
3119   [`if test $gcc_cv_as_comdat_group = yes \
3120     || test $gcc_cv_as_comdat_group_percent = yes \
3121     || test $gcc_cv_as_comdat_group_group = yes; then echo 1; else echo 0; fi`],
3122 [Define 0/1 if your assembler and linker support COMDAT groups.])
3123
3124 # Restrict this test to Solaris/x86: other targets define this statically.
3125 case "${target}" in
3126   i?86-*-solaris2* | x86_64-*-solaris2*)
3127     AC_MSG_CHECKING(support for hidden thunks in linkonce sections)
3128     if test $in_tree_ld = yes || echo "$ld_ver" | grep GNU > /dev/null; then
3129       hidden_linkonce=yes
3130     else
3131       case "${target}" in
3132         # Full support for hidden thunks in linkonce sections only appeared in
3133         # Solaris 11/OpenSolaris.
3134         *-*-solaris2.1[[1-9]]*)
3135           hidden_linkonce=yes
3136           ;;
3137         *)
3138           hidden_linkonce=no
3139           ;;
3140       esac
3141     fi
3142     AC_MSG_RESULT($hidden_linkonce)
3143     AC_DEFINE_UNQUOTED(USE_HIDDEN_LINKONCE,
3144       [`if test $hidden_linkonce = yes; then echo 1; else echo 0; fi`],
3145     [Define 0/1 if your linker supports hidden thunks in linkonce sections.])
3146   ;;
3147 esac
3148
3149 gcc_GAS_CHECK_FEATURE([line table is_stmt support],
3150  gcc_cv_as_is_stmt,
3151  [2,16,92],,
3152 [       .text
3153         .file 1 "conf.c"
3154         .loc 1 1 0 is_stmt 1],,
3155 [AC_DEFINE(HAVE_GAS_LOC_STMT, 1,
3156   [Define if your assembler supports the .loc is_stmt sub-directive.])])
3157
3158 gcc_GAS_CHECK_FEATURE([line table discriminator support],
3159  gcc_cv_as_discriminator,
3160  [2,19,51],,
3161 [       .text
3162         .file 1 "conf.c"
3163         .loc 1 1 0 discriminator 1],,
3164 [AC_DEFINE(HAVE_GAS_DISCRIMINATOR, 1,
3165   [Define if your assembler supports the .loc discriminator sub-directive.])])
3166
3167 # Thread-local storage - the check is heavily parameterized.
3168 conftest_s=
3169 tls_first_major=
3170 tls_first_minor=
3171 tls_as_opt=
3172 case "$target" in
3173 changequote(,)dnl
3174   alpha*-*-*)
3175     conftest_s='
3176         .section ".tdata","awT",@progbits
3177 foo:    .long   25
3178         .text
3179         ldq     $27,__tls_get_addr($29)         !literal!1
3180         lda     $16,foo($29)                    !tlsgd!1
3181         jsr     $26,($27),__tls_get_addr        !lituse_tlsgd!1
3182         ldq     $27,__tls_get_addr($29)         !literal!2
3183         lda     $16,foo($29)                    !tlsldm!2
3184         jsr     $26,($27),__tls_get_addr        !lituse_tlsldm!2
3185         ldq     $1,foo($29)                     !gotdtprel
3186         ldah    $2,foo($29)                     !dtprelhi
3187         lda     $3,foo($2)                      !dtprello
3188         lda     $4,foo($29)                     !dtprel
3189         ldq     $1,foo($29)                     !gottprel
3190         ldah    $2,foo($29)                     !tprelhi
3191         lda     $3,foo($2)                      !tprello
3192         lda     $4,foo($29)                     !tprel'
3193         tls_first_major=2
3194         tls_first_minor=13
3195         tls_as_opt=--fatal-warnings
3196         ;;
3197   arc*-*-*)
3198     conftest_s='
3199         add_s r0,r0, @foo@tpoff'
3200         tls_first_major=2
3201         tls_first_minor=23
3202         ;;
3203   cris-*-*|crisv32-*-*)
3204     conftest_s='
3205         .section ".tdata","awT",@progbits
3206 x:      .long   25
3207         .text
3208         move.d x:IE,$r10
3209         nop'
3210         tls_first_major=2
3211         tls_first_minor=20
3212         tls_as_opt=--fatal-warnings
3213         ;;
3214   frv*-*-*)
3215     conftest_s='
3216         .section ".tdata","awT",@progbits
3217 x:      .long   25
3218         .text
3219         call    #gettlsoff(x)'
3220         tls_first_major=2
3221         tls_first_minor=14
3222         ;;
3223   hppa*-*-linux*)
3224     conftest_s='
3225 t1:     .reg    %r20
3226 t2:     .reg    %r21
3227 gp:     .reg    %r19
3228         .section ".tdata","awT",@progbits
3229 foo:    .long   25
3230         .text
3231         .align  4
3232         addil LT%foo-$tls_gdidx$,gp
3233         ldo RT%foo-$tls_gdidx$(%r1),%arg0
3234         b __tls_get_addr
3235         nop
3236         addil LT%foo-$tls_ldidx$,gp
3237         b __tls_get_addr
3238         ldo RT%foo-$tls_ldidx$(%r1),%arg0
3239         addil LR%foo-$tls_dtpoff$,%ret0
3240         ldo RR%foo-$tls_dtpoff$(%r1),%t1
3241         mfctl %cr27,%t1
3242         addil LT%foo-$tls_ieoff$,gp
3243         ldw RT%foo-$tls_ieoff$(%r1),%t2
3244         add %t1,%t2,%t3
3245         mfctl %cr27,%t1
3246         addil LR%foo-$tls_leoff$,%t1
3247         ldo RR%foo-$tls_leoff$(%r1),%t2'
3248         tls_first_major=2
3249         tls_first_minor=15
3250         tls_as_opt=--fatal-warnings
3251         ;;
3252   arm*-*-*)
3253     conftest_s='
3254         .section ".tdata","awT",%progbits
3255 foo:    .long   25
3256         .text
3257 .word foo(gottpoff)
3258 .word foo(tpoff)
3259 .word foo(tlsgd)
3260 .word foo(tlsldm)
3261 .word foo(tlsldo)'
3262         tls_first_major=2
3263         tls_first_minor=17
3264         ;;
3265   i[34567]86-*-* | x86_64-*-*)
3266     case "$target" in
3267       i[34567]86-*-solaris2.* | x86_64-*-solaris2.1[0-9]*)
3268         on_solaris=yes
3269         ;;
3270       *)
3271         on_solaris=no
3272         ;;
3273     esac
3274     if test x$on_solaris = xyes && test x$gas_flag = xno; then
3275       conftest_s='
3276         .section .tdata,"awt",@progbits'
3277       tls_first_major=0
3278       tls_first_minor=0
3279       tls_section_flag=t
3280 changequote([,])dnl
3281       AC_DEFINE(TLS_SECTION_ASM_FLAG, 't',
3282 [Define to the flag used to mark TLS sections if the default (`T') doesn't work.])
3283 changequote(,)dnl
3284     else
3285       conftest_s='
3286         .section ".tdata","awT",@progbits'
3287       tls_first_major=2
3288       tls_first_minor=14
3289       tls_section_flag=T
3290       tls_as_opt="--fatal-warnings"
3291     fi
3292     case "$target" in
3293       i[34567]86-*-*)
3294         conftest_s="$conftest_s
3295 foo:    .long   25
3296         .text
3297         movl    %gs:0, %eax
3298         leal    foo@tlsgd(,%ebx,1), %eax
3299         leal    foo@tlsldm(%ebx), %eax
3300         leal    foo@dtpoff(%eax), %edx
3301         movl    foo@gottpoff(%ebx), %eax
3302         subl    foo@gottpoff(%ebx), %eax
3303         addl    foo@gotntpoff(%ebx), %eax
3304         movl    foo@indntpoff, %eax
3305         movl    \$foo@tpoff, %eax
3306         subl    \$foo@tpoff, %eax
3307         leal    foo@ntpoff(%ecx), %eax"
3308         ;;
3309       x86_64-*-*)
3310         if test x$on_solaris = xyes; then
3311           case $gas_flag in
3312             yes) tls_as_opt="$tls_as_opt --64" ;;
3313             no)  tls_as_opt="$tls_as_opt -xarch=amd64" ;;
3314           esac
3315         fi
3316         conftest_s="$conftest_s
3317 foo:    .long   25
3318         .text
3319         movq    %fs:0, %rax
3320         leaq    foo@tlsgd(%rip), %rdi
3321         leaq    foo@tlsld(%rip), %rdi
3322         leaq    foo@dtpoff(%rax), %rdx
3323         movq    foo@gottpoff(%rip), %rax
3324         movq    \$foo@tpoff, %rax"
3325         ;;
3326     esac
3327     ;;
3328   ia64-*-*)
3329     conftest_s='
3330         .section ".tdata","awT",@progbits
3331 foo:    data8   25
3332         .text
3333         addl    r16 = @ltoff(@dtpmod(foo#)), gp
3334         addl    r17 = @ltoff(@dtprel(foo#)), gp
3335         addl    r18 = @ltoff(@tprel(foo#)), gp
3336         addl    r19 = @dtprel(foo#), gp
3337         adds    r21 = @dtprel(foo#), r13
3338         movl    r23 = @dtprel(foo#)
3339         addl    r20 = @tprel(foo#), gp
3340         adds    r22 = @tprel(foo#), r13
3341         movl    r24 = @tprel(foo#)'
3342         tls_first_major=2
3343         tls_first_minor=13
3344         tls_as_opt=--fatal-warnings
3345         ;;
3346   microblaze*-*-*)
3347     conftest_s='
3348         .section .tdata,"awT",@progbits
3349 x:
3350         .word 2
3351         .text
3352         addik r5,r20,x@TLSGD
3353         addik r5,r20,x@TLSLDM'
3354         tls_first_major=2
3355         tls_first_minor=20
3356         tls_as_opt='--fatal-warnings'
3357         ;;
3358   mips*-*-*)
3359     conftest_s='
3360         .section .tdata,"awT",@progbits
3361 x:
3362         .word 2
3363         .text
3364         addiu $4, $28, %tlsgd(x)
3365         addiu $4, $28, %tlsldm(x)
3366         lui $4, %dtprel_hi(x)
3367         addiu $4, $4, %dtprel_lo(x)
3368         lw $4, %gottprel(x)($28)
3369         lui $4, %tprel_hi(x)
3370         addiu $4, $4, %tprel_lo(x)'
3371         tls_first_major=2
3372         tls_first_minor=16
3373         tls_as_opt='-32 --fatal-warnings'
3374         ;;
3375   m68k-*-*)
3376     conftest_s='
3377         .section .tdata,"awT",@progbits
3378 x:
3379         .word 2
3380         .text
3381 foo:
3382         move.l x@TLSGD(%a5),%a0
3383         move.l x@TLSLDM(%a5),%a0
3384         move.l x@TLSLDO(%a5),%a0
3385         move.l x@TLSIE(%a5),%a0
3386         move.l x@TLSLE(%a5),%a0'
3387         tls_first_major=2
3388         tls_first_minor=19
3389         tls_as_opt='--fatal-warnings'
3390         ;;
3391   nios2-*-*)
3392       conftest_s='
3393         .section ".tdata","awT",@progbits'
3394         tls_first_major=2
3395         tls_first_minor=23
3396         tls_as_opt="--fatal-warnings"
3397         ;;
3398   aarch64*-*-*)
3399     conftest_s='
3400         .section ".tdata","awT",%progbits
3401 foo:    .long   25
3402         .text
3403         adrp  x0, :tlsgd:x
3404         add   x0, x0, #:tlsgd_lo12:x
3405         bl    __tls_get_addr
3406         nop'
3407         tls_first_major=2
3408         tls_first_minor=20
3409         tls_as_opt='--fatal-warnings'
3410         ;;
3411   powerpc-ibm-aix*)
3412     conftest_s='
3413         .extern __get_tpointer
3414         .toc
3415 LC..1:
3416         .tc a[TC],a[TL]@le
3417         .csect .text[PR]
3418 .tlstest:
3419         lwz 9,LC..1(2)
3420         bla __get_tpointer
3421         lwzx 3,9,3
3422         .globl a
3423         .csect a[TL],4
3424 a:
3425         .space 4'
3426         tls_first_major=0
3427         tls_first_minor=0
3428         ;;
3429   powerpc64*-*-*)
3430     conftest_s='
3431         .section ".tdata","awT",@progbits
3432         .align 3
3433 ld0:    .space 8
3434 ld1:    .space 8
3435 x1:     .space 8
3436 x2:     .space 8
3437 x3:     .space 8
3438         .text
3439         addi 3,2,ld0@got@tlsgd
3440         bl .__tls_get_addr
3441         nop
3442         addi 3,2,ld1@toc
3443         bl .__tls_get_addr
3444         nop
3445         addi 3,2,x1@got@tlsld
3446         bl .__tls_get_addr
3447         nop
3448         addi 9,3,x1@dtprel
3449         bl .__tls_get_addr
3450         nop
3451         addis 9,3,x2@dtprel@ha
3452         addi 9,9,x2@dtprel@l
3453         bl .__tls_get_addr
3454         nop
3455         ld 9,x3@got@dtprel(2)
3456         add 9,9,3
3457         bl .__tls_get_addr
3458         nop'
3459         tls_first_major=2
3460         tls_first_minor=14
3461         tls_as_opt="-a64 --fatal-warnings"
3462         ;;
3463   powerpc*-*-*)
3464     conftest_s='
3465         .section ".tdata","awT",@progbits
3466         .align 2
3467 ld0:    .space 4
3468 ld1:    .space 4
3469 x1:     .space 4
3470 x2:     .space 4
3471 x3:     .space 4
3472         .text
3473         addi 3,31,ld0@got@tlsgd
3474         bl __tls_get_addr
3475         addi 3,31,x1@got@tlsld
3476         bl __tls_get_addr
3477         addi 9,3,x1@dtprel
3478         addis 9,3,x2@dtprel@ha
3479         addi 9,9,x2@dtprel@l
3480         lwz 9,x3@got@tprel(31)
3481         add 9,9,x@tls
3482         addi 9,2,x1@tprel
3483         addis 9,2,x2@tprel@ha
3484         addi 9,9,x2@tprel@l'
3485         tls_first_major=2
3486         tls_first_minor=14
3487         tls_as_opt="-a32 --fatal-warnings"
3488         ;;
3489   riscv*-*-*)
3490     conftest_s='
3491         .section .tdata,"awT",@progbits
3492 x:      .word 2
3493         .text
3494         la.tls.gd a0,x
3495         call __tls_get_addr'
3496         tls_first_major=2
3497         tls_first_minor=21
3498         tls_as_opt='--fatal-warnings'
3499         ;;
3500   s390-*-*)
3501     conftest_s='
3502         .section ".tdata","awT",@progbits
3503 foo:    .long   25
3504         .text
3505         .long   foo@TLSGD
3506         .long   foo@TLSLDM
3507         .long   foo@DTPOFF
3508         .long   foo@NTPOFF
3509         .long   foo@GOTNTPOFF
3510         .long   foo@INDNTPOFF
3511         l       %r1,foo@GOTNTPOFF(%r12)
3512         l       %r1,0(%r1):tls_load:foo
3513         bas     %r14,0(%r1,%r13):tls_gdcall:foo
3514         bas     %r14,0(%r1,%r13):tls_ldcall:foo'
3515         tls_first_major=2
3516         tls_first_minor=14
3517         tls_as_opt="-m31 --fatal-warnings"
3518         ;;
3519   s390x-*-*)
3520     conftest_s='
3521         .section ".tdata","awT",@progbits
3522 foo:    .long   25
3523         .text
3524         .quad   foo@TLSGD
3525         .quad   foo@TLSLDM
3526         .quad   foo@DTPOFF
3527         .quad   foo@NTPOFF
3528         .quad   foo@GOTNTPOFF
3529         lg      %r1,foo@GOTNTPOFF(%r12)
3530         larl    %r1,foo@INDNTPOFF
3531         brasl   %r14,__tls_get_offset@PLT:tls_gdcall:foo
3532         brasl   %r14,__tls_get_offset@PLT:tls_ldcall:foo'
3533         tls_first_major=2
3534         tls_first_minor=14
3535         tls_as_opt="-m64 -Aesame --fatal-warnings"
3536         ;;
3537   sh-*-* | sh[123456789lbe]*-*-*)
3538     conftest_s='
3539         .section ".tdata","awT",@progbits
3540 foo:    .long   25
3541         .text
3542         .long   foo@TLSGD
3543         .long   foo@TLSLDM
3544         .long   foo@DTPOFF
3545         .long   foo@GOTTPOFF
3546         .long   foo@TPOFF'
3547         tls_first_major=2
3548         tls_first_minor=13
3549         tls_as_opt=--fatal-warnings
3550         ;;
3551   sparc*-*-*)
3552     case "$target" in
3553       sparc*-sun-solaris2.*)
3554         on_solaris=yes
3555         ;;
3556       *)
3557         on_solaris=no
3558         ;;
3559     esac
3560     if test x$on_solaris = xyes && test x$gas_flag = xno; then
3561       conftest_s='
3562         .section ".tdata",#alloc,#write,#tls'
3563         tls_first_major=0
3564         tls_first_minor=0
3565     else
3566       conftest_s='
3567         .section ".tdata","awT",@progbits'
3568         tls_first_major=2
3569         tls_first_minor=14
3570         tls_as_opt="-32 --fatal-warnings"
3571     fi
3572     conftest_s="$conftest_s
3573 foo:    .long   25
3574         .text
3575         sethi   %tgd_hi22(foo), %o0
3576         add     %o0, %tgd_lo10(foo), %o1
3577         add     %l7, %o1, %o0, %tgd_add(foo)
3578         call    __tls_get_addr, %tgd_call(foo)
3579         sethi   %tldm_hi22(foo), %l1
3580         add     %l1, %tldm_lo10(foo), %l2
3581         add     %l7, %l2, %o0, %tldm_add(foo)
3582         call    __tls_get_addr, %tldm_call(foo)
3583         sethi   %tldo_hix22(foo), %l3
3584         xor     %l3, %tldo_lox10(foo), %l4
3585         add     %o0, %l4, %l5, %tldo_add(foo)
3586         sethi   %tie_hi22(foo), %o3
3587         add     %o3, %tie_lo10(foo), %o3
3588         ld      [%l7 + %o3], %o2, %tie_ld(foo)
3589         add     %g7, %o2, %o4, %tie_add(foo)
3590         sethi   %tle_hix22(foo), %l1
3591         xor     %l1, %tle_lox10(foo), %o5
3592         ld      [%g7 + %o5], %o1"
3593         ;;
3594   tilepro*-*-*)
3595       conftest_s='
3596         .section ".tdata","awT",@progbits
3597 foo:    .long   25
3598         .text
3599         addli   r0, zero, tls_gd(foo)
3600         auli    r0, zero, tls_gd_ha16(foo)
3601         addli   r0, r0, tls_gd_lo16(foo)
3602         jal     __tls_get_addr
3603         addli   r0, zero, tls_ie(foo)
3604         auli    r0, r0, tls_ie_ha16(foo)
3605         addli   r0, r0, tls_ie_lo16(foo)'
3606         tls_first_major=2
3607         tls_first_minor=22
3608         tls_as_opt="--fatal-warnings"
3609         ;;
3610   tilegx*-*-*)
3611       conftest_s='
3612         .section ".tdata","awT",@progbits
3613 foo:    .long   25
3614         .text
3615         shl16insli r0, zero, hw0_last_tls_gd(foo)
3616         shl16insli r0, zero, hw1_last_tls_gd(foo)
3617         shl16insli r0, r0,   hw0_tls_gd(foo)
3618         jal        __tls_get_addr
3619         shl16insli r0, zero, hw1_last_tls_ie(foo)
3620         shl16insli r0, r0,   hw0_tls_ie(foo)'
3621         tls_first_major=2
3622         tls_first_minor=22
3623         tls_as_opt="--fatal-warnings"
3624         ;;
3625   xtensa*-*-*)
3626     conftest_s='
3627         .section ".tdata","awT",@progbits
3628 foo:    .long   25
3629         .text
3630         movi    a8, foo@TLSFUNC
3631         movi    a10, foo@TLSARG
3632         callx8.tls a8, foo@TLSCALL'
3633         tls_first_major=2
3634         tls_first_minor=19
3635         ;;
3636 changequote([,])dnl
3637 esac
3638 set_have_as_tls=no
3639 if test "x$enable_tls" = xno ; then
3640   : # TLS explicitly disabled.
3641 elif test "x$enable_tls" = xyes ; then
3642   set_have_as_tls=yes # TLS explicitly enabled.
3643 elif test -z "$tls_first_major"; then
3644   : # If we don't have a check, assume no support.
3645 else
3646   gcc_GAS_CHECK_FEATURE(thread-local storage support, gcc_cv_as_tls,
3647   [$tls_first_major,$tls_first_minor,0], [$tls_as_opt], [$conftest_s],,
3648   [set_have_as_tls=yes])
3649 fi
3650 if test $set_have_as_tls = yes ; then
3651   AC_DEFINE(HAVE_AS_TLS, 1,
3652             [Define if your assembler and linker support thread-local storage.])
3653 fi
3654
3655 # Target-specific assembler checks.
3656
3657 AC_MSG_CHECKING(linker -Bstatic/-Bdynamic option)
3658 gcc_cv_ld_static_dynamic=no
3659 gcc_cv_ld_static_option='-Bstatic'
3660 gcc_cv_ld_dynamic_option='-Bdynamic'
3661 if test $in_tree_ld = yes ; then
3662   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2; then
3663     gcc_cv_ld_static_dynamic=yes
3664   fi
3665 elif test x$gcc_cv_ld != x; then
3666   # Check if linker supports -Bstatic/-Bdynamic option
3667   if $gcc_cv_ld --help 2>&1 | grep -- -Bstatic > /dev/null \
3668      && $gcc_cv_ld --help 2>&1 | grep -- -Bdynamic > /dev/null; then
3669       gcc_cv_ld_static_dynamic=yes
3670   else
3671     case "$target" in
3672       # AIX ld uses -b flags
3673       *-*-aix4.[[23]]* | *-*-aix[[5-9]]*)
3674         gcc_cv_ld_static_dynamic=yes
3675         gcc_cv_ld_static_option="-bstatic"
3676         gcc_cv_ld_dynamic_option="-bdynamic"
3677         ;;
3678       # HP-UX ld uses -a flags to select between shared and archive.
3679       *-*-hpux*)
3680         if test x"$gnu_ld" = xno; then
3681           gcc_cv_ld_static_dynamic=yes
3682           gcc_cv_ld_static_option="-aarchive_shared"
3683           gcc_cv_ld_dynamic_option="-adefault"
3684         fi
3685         ;;
3686       # Solaris 2 ld always supports -Bstatic/-Bdynamic.
3687       *-*-solaris2*)
3688         gcc_cv_ld_static_dynamic=yes
3689         ;;
3690     esac
3691   fi
3692 fi
3693 if test x"$gcc_cv_ld_static_dynamic" = xyes; then
3694         AC_DEFINE(HAVE_LD_STATIC_DYNAMIC, 1,
3695 [Define if your linker supports -Bstatic/-Bdynamic or equivalent options.])
3696         AC_DEFINE_UNQUOTED(LD_STATIC_OPTION, "$gcc_cv_ld_static_option",
3697 [Define to the linker option to disable use of shared objects.])
3698         AC_DEFINE_UNQUOTED(LD_DYNAMIC_OPTION, "$gcc_cv_ld_dynamic_option",
3699 [Define to the linker option to enable use of shared objects.])
3700 fi
3701 AC_MSG_RESULT($gcc_cv_ld_static_dynamic)
3702
3703 AC_MSG_CHECKING(linker --version-script option)
3704 gcc_cv_ld_version_script=no
3705 ld_version_script_option=''
3706 if test $in_tree_ld = yes || test x"$gnu_ld" = xyes; then
3707   gcc_cv_ld_version_script=yes
3708   ld_version_script_option='--version-script'
3709 elif test x$gcc_cv_ld != x; then
3710   case "$target" in
3711     # Solaris 2 ld always supports -M.  It also supports a subset of
3712     # --version-script since Solaris 11.4, but requires
3713     # -z gnu-version-script-compat to activate.
3714     *-*-solaris2*)
3715       gcc_cv_ld_version_script=yes
3716       ld_version_script_option='-M'
3717       ;;
3718   esac
3719 fi
3720 # Don't AC_DEFINE result, only used in jit/Make-lang.in so far.
3721 AC_MSG_RESULT($gcc_cv_ld_version_script)
3722 AC_SUBST(ld_version_script_option)
3723
3724 AC_MSG_CHECKING(linker soname option)
3725 gcc_cv_ld_soname=no
3726 if test $in_tree_ld = yes || test x"$gnu_ld" = xyes; then
3727   gcc_cv_ld_soname=yes
3728   ld_soname_option='-soname'
3729 elif test x$gcc_cv_ld != x; then
3730   case "$target" in
3731     *-*-darwin*)
3732       gcc_cv_ld_soname=yes
3733       ld_soname_option='-install_name'
3734       ;;
3735     # Solaris 2 ld always supports -h.  It also supports --soname for GNU
3736     # ld compatiblity since some Solaris 10 update.
3737     *-*-solaris2*)
3738       gcc_cv_ld_soname=yes
3739       ld_soname_option='-h'
3740       ;;
3741   esac
3742 fi
3743 # Don't AC_DEFINE result, only used in jit/Make-lang.in so far.
3744 AC_MSG_RESULT($gcc_cv_ld_soname)
3745 AC_SUBST(ld_soname_option)
3746
3747 if test x"$demangler_in_ld" = xyes; then
3748   AC_MSG_CHECKING(linker --demangle support)
3749   gcc_cv_ld_demangle=no
3750   if test $in_tree_ld = yes; then
3751     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 14 -o "$gcc_cv_gld_major_version" -gt 2; then \
3752       gcc_cv_ld_demangle=yes
3753     fi
3754   elif test x$gcc_cv_ld != x -a x"$gnu_ld" = xyes; then
3755     # Check if the GNU linker supports --demangle option
3756     if $gcc_cv_ld --help 2>&1 | grep no-demangle > /dev/null; then
3757       gcc_cv_ld_demangle=yes
3758     fi
3759   fi
3760   if test x"$gcc_cv_ld_demangle" = xyes; then
3761     AC_DEFINE(HAVE_LD_DEMANGLE, 1,
3762 [Define if your linker supports --demangle option.])
3763   fi
3764   AC_MSG_RESULT($gcc_cv_ld_demangle)
3765 fi
3766
3767 AC_MSG_CHECKING(linker plugin support)
3768 gcc_cv_lto_plugin=0
3769 if test -f liblto_plugin.la; then
3770   save_ld_ver="$ld_ver"
3771   save_ld_vers_major="$ld_vers_major"
3772   save_ld_vers_minor="$ld_vers_minor"
3773   save_ld_is_gold="$ld_is_gold"
3774
3775   ld_is_gold=no
3776
3777   if test $in_tree_ld = yes -a x"$ORIGINAL_PLUGIN_LD_FOR_TARGET" = x"$gcc_cv_ld"; then
3778     ld_ver="GNU ld"
3779     # FIXME: ld_is_gold?
3780     ld_vers_major="$gcc_cv_gld_major_version"
3781     ld_vers_minor="$gcc_cv_gld_minor_version"
3782   else
3783     # Determine plugin linker version.
3784     # FIXME: Partial duplicate from above, generalize.
3785 changequote(,)dnl
3786     ld_ver=`$ORIGINAL_PLUGIN_LD_FOR_TARGET --version 2>/dev/null | sed 1q`
3787     if echo "$ld_ver" | grep GNU > /dev/null; then
3788       if echo "$ld_ver" | grep "GNU gold" > /dev/null; then
3789         ld_is_gold=yes
3790         ld_vers=`echo $ld_ver | sed -n \
3791             -e 's,^[^)]*[        ]\([0-9][0-9]*\.[0-9][0-9]*[^)]*\)) .*$,\1,p'`
3792       else
3793         ld_vers=`echo $ld_ver | sed -n \
3794             -e 's,^.*[   ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
3795       fi
3796       ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
3797       ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
3798     fi
3799 changequote([,])dnl
3800   fi
3801
3802   # Determine plugin support.
3803   if echo "$ld_ver" | grep GNU > /dev/null; then
3804     # Require GNU ld or gold 2.21+ for plugin support by default.
3805     if test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -ge 21; then
3806       gcc_cv_lto_plugin=2
3807     # Allow -fuse-linker-plugin to enable plugin support in GNU gold 2.20.
3808     elif test "$ld_is_gold" = yes -a "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 20; then
3809       gcc_cv_lto_plugin=1
3810     fi
3811   fi
3812
3813   ld_ver="$save_ld_ver"
3814   ld_vers_major="$save_ld_vers_major"
3815   ld_vers_minor="$save_ld_vers_minor"
3816   ld_is_gold="$save_ld_is_gold"
3817 fi
3818 AC_DEFINE_UNQUOTED(HAVE_LTO_PLUGIN, $gcc_cv_lto_plugin,
3819   [Define to the level of your linker's plugin support.])
3820 AC_MSG_RESULT($gcc_cv_lto_plugin)
3821
3822 # Target OS-specific assembler checks.
3823
3824 case "$target_os" in
3825   darwin*)
3826     gcc_GAS_CHECK_FEATURE([-mmacosx-version-min option],
3827       gcc_cv_as_mmacosx_version_min,,
3828       [-mmacosx-version-min=10.1], [.text],,
3829       [AC_DEFINE(HAVE_AS_MMACOSX_VERSION_MIN_OPTION, 1,
3830         [Define if your Mac OS X assembler supports the -mmacos-version-min option.])])
3831     ;;
3832 esac
3833
3834 # Target CPU-specific assembler checks.
3835
3836 case "$target" in
3837   aarch64*-*-*)
3838     gcc_GAS_CHECK_FEATURE([-mabi option], gcc_cv_as_aarch64_mabi,,
3839                           [-mabi=lp64], [.text],,,)
3840     if test x$gcc_cv_as_aarch64_mabi = xyes; then
3841       AC_DEFINE(HAVE_AS_MABI_OPTION, 1,
3842                 [Define if your assembler supports the -mabi option.])
3843     else
3844       if test x$with_abi = xilp32; then
3845         AC_MSG_ERROR([Assembler does not support -mabi=ilp32.\
3846                      Upgrade the Assembler.])
3847       fi
3848       if test x"$with_multilib_list" = xdefault; then
3849         TM_MULTILIB_CONFIG=lp64
3850       else
3851         aarch64_multilibs=`echo $with_multilib_list | sed -e 's/,/ /g'`
3852         for aarch64_multilib in ${aarch64_multilibs}; do
3853           case ${aarch64_multilib} in
3854             ilp32)
3855               AC_MSG_ERROR([Assembler does not support -mabi=ilp32.\
3856                             Upgrade the Assembler.])
3857               ;;
3858             *)
3859               ;;
3860           esac
3861         done
3862       fi
3863     fi
3864     # Check if we have binutils support for relocations types needed by -fpic
3865     gcc_GAS_CHECK_FEATURE([-fpic relocs], gcc_cv_as_aarch64_picreloc,,,
3866     [
3867         .text
3868         ldr     x0, [[x2, #:gotpage_lo15:globalsym]]
3869     ],,[AC_DEFINE(HAVE_AS_SMALL_PIC_RELOCS, 1,
3870         [Define if your assembler supports relocs needed by -fpic.])])
3871     # Enable default workaround for AArch64 Cortex-A53 erratum 835769.
3872     AC_ARG_ENABLE(fix-cortex-a53-835769,
3873     [
3874 AS_HELP_STRING([--enable-fix-cortex-a53-835769],
3875         [enable workaround for AArch64 Cortex-A53 erratum 835769 by default])
3876 AS_HELP_STRING([--disable-fix-cortex-a53-835769],
3877         [disable workaround for AArch64 Cortex-A53 erratum 835769 by default])
3878     ],
3879       [
3880         case $enableval in
3881           yes)
3882             tm_defines="${tm_defines} TARGET_FIX_ERR_A53_835769_DEFAULT=1"
3883             ;;
3884           no)
3885             ;;
3886           *)
3887             AC_MSG_ERROR(['$enableval' is an invalid value for --enable-fix-cortex-a53-835769.\
3888   Valid choices are 'yes' and 'no'.])
3889             ;;
3890
3891         esac
3892       ],
3893     [])
3894     # Enable default workaround for AArch64 Cortex-A53 erratum 843419.
3895     AC_ARG_ENABLE(fix-cortex-a53-843419,
3896     [
3897 AS_HELP_STRING([--enable-fix-cortex-a53-843419],
3898         [enable workaround for AArch64 Cortex-A53 erratum 843419 by default])
3899 AS_HELP_STRING([--disable-fix-cortex-a53-843419],
3900         [disable workaround for AArch64 Cortex-A53 erratum 843419 by default])
3901     ],
3902       [
3903         case $enableval in
3904           yes)
3905             tm_defines="${tm_defines} TARGET_FIX_ERR_A53_843419_DEFAULT=1"
3906             ;;
3907           no)
3908             ;;
3909           *)
3910             AC_MSG_ERROR(['$enableval' is an invalid value for --enable-fix-cortex-a53-843419.\
3911   Valid choices are 'yes' and 'no'.])
3912             ;;
3913
3914         esac
3915       ],
3916     [])
3917     ;;
3918
3919   # All TARGET_ABI_OSF targets.
3920   alpha*-*-linux* | alpha*-*-*bsd*)
3921     gcc_GAS_CHECK_FEATURE([explicit relocation support],
3922         gcc_cv_as_alpha_explicit_relocs, [2,12,0],,
3923 [       .set nomacro
3924         .text
3925         extbl   $3, $2, $3      !lituse_bytoff!1
3926         ldq     $2, a($29)      !literal!1
3927         ldq     $4, b($29)      !literal!2
3928         ldq_u   $3, 0($2)       !lituse_base!1
3929         ldq     $27, f($29)     !literal!5
3930         jsr     $26, ($27), f   !lituse_jsr!5
3931         ldah    $29, 0($26)     !gpdisp!3
3932         lda     $0, c($29)      !gprel
3933         ldah    $1, d($29)      !gprelhigh
3934         lda     $1, d($1)       !gprellow
3935         lda     $29, 0($29)     !gpdisp!3],,
3936     [AC_DEFINE(HAVE_AS_EXPLICIT_RELOCS, 1,
3937   [Define if your assembler supports explicit relocations.])])
3938     gcc_GAS_CHECK_FEATURE([jsrdirect relocation support],
3939         gcc_cv_as_alpha_jsrdirect_relocs, [2,16,90],,
3940 [       .set nomacro
3941         .text
3942         ldq     $27, a($29)     !literal!1
3943         jsr     $26, ($27), a   !lituse_jsrdirect!1],,
3944     [AC_DEFINE(HAVE_AS_JSRDIRECT_RELOCS, 1,
3945   [Define if your assembler supports the lituse_jsrdirect relocation.])])
3946     ;;
3947
3948   avr-*-*)
3949     gcc_GAS_CHECK_FEATURE([--mlink-relax option], gcc_cv_as_avr_mlink_relax,,
3950       [--mlink-relax], [.text],,
3951       [AC_DEFINE(HAVE_AS_AVR_MLINK_RELAX_OPTION, 1,
3952                 [Define if your avr assembler supports --mlink-relax option.])])
3953
3954     gcc_GAS_CHECK_FEATURE([-mrmw option], gcc_cv_as_avr_mrmw,,
3955       [-mrmw], [.text],,
3956       [AC_DEFINE(HAVE_AS_AVR_MRMW_OPTION, 1,
3957                 [Define if your avr assembler supports -mrmw option.])])
3958
3959     gcc_GAS_CHECK_FEATURE([__gcc_isr pseudo instruction],
3960       gcc_cv_as_avr_mgccisr,,
3961       [-mgcc-isr], [.text
3962                     __gcc_isr 1
3963                     __gcc_isr 2
3964                     __gcc_isr 0,r24
3965                    ],,
3966       [AC_DEFINE(HAVE_AS_AVR_MGCCISR_OPTION, 1,
3967                 [Define if your avr assembler supports -mgcc-isr option.])])
3968
3969     # Check how default linker description file implements .rodata for
3970     # avrxmega3 (PR21472).  avr-gcc assumes .rodata is *not* loaded to
3971     # RAM so avr-gcc skips __do_copy_data for .rodata objects.
3972     AC_MSG_CHECKING(binutils for avrxmega3 .rodata support)
3973     cat > conftest.s <<EOF
3974         .section .rodata,"a",@progbits
3975         .global xxvaryy
3976     ;; avr-nm should print "... R xxvaryy", not "... D xxvaryy".
3977     xxvaryy:
3978         .word 1
3979 EOF
3980     rm -f conftest.nm
3981     AC_TRY_COMMAND([$gcc_cv_as -mmcu=avrxmega3 conftest.s -o conftest.o])
3982     AC_TRY_COMMAND([$gcc_cv_ld -mavrxmega3 conftest.o -o conftest.elf])
3983     AC_TRY_COMMAND([$gcc_cv_nm conftest.elf > conftest.nm])
3984     if test -s conftest.nm
3985     then
3986         if grep ' R xxvaryy' conftest.nm > /dev/null; then
3987             AC_MSG_RESULT(yes)
3988             AC_DEFINE(HAVE_LD_AVR_AVRXMEGA3_RODATA_IN_FLASH, 1,
3989                 [Define if your default avr linker script for avrxmega3 leaves .rodata in flash.])
3990         else
3991             AC_MSG_RESULT(no: avrxmega3 .rodata located in RAM)
3992             echo "$as_me: nm output was" >&AS_MESSAGE_LOG_FD
3993             cat conftest.nm >&AS_MESSAGE_LOG_FD
3994             avr_ld_ver="`$gcc_cv_ld -v | sed -e 's:^.* ::'`"
3995             AC_MSG_WARN([[support for avrxmega3 .rodata in flash needs Binutils 2.29 or higher (have $avr_ld_ver)]])
3996         fi
3997     else
3998         AC_MSG_RESULT(test failed)
3999         echo "$as_me: failed program was" >&AS_MESSAGE_LOG_FD
4000         cat conftest.s >&AS_MESSAGE_LOG_FD
4001         AC_MSG_WARN([[see `config.log' for details]])
4002     fi
4003     rm -f conftest.s conftest.o conftest.elf conftest.nm
4004     ;;
4005
4006   cris-*-*)
4007     gcc_GAS_CHECK_FEATURE([-no-mul-bug-abort option],
4008       gcc_cv_as_cris_no_mul_bug,[2,15,91],
4009       [-no-mul-bug-abort], [.text],,
4010       [AC_DEFINE(HAVE_AS_NO_MUL_BUG_ABORT_OPTION, 1,
4011                 [Define if your assembler supports the -no-mul-bug-abort option.])])
4012     ;;
4013
4014   sparc*-*-*)
4015     gcc_GAS_CHECK_FEATURE([.register], gcc_cv_as_sparc_register_op,,,
4016       [.register %g2, #scratch],,
4017       [AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
4018                 [Define if your assembler supports .register.])])
4019
4020     gcc_GAS_CHECK_FEATURE([-relax option], gcc_cv_as_sparc_relax,,
4021       [-relax], [.text],,
4022       [AC_DEFINE(HAVE_AS_RELAX_OPTION, 1,
4023                 [Define if your assembler supports -relax option.])])
4024
4025     gcc_GAS_CHECK_FEATURE([GOTDATA_OP relocs],
4026       gcc_cv_as_sparc_gotdata_op,,
4027       [-K PIC],
4028 [.text
4029 .align 4
4030 foo:
4031         nop
4032 bar:
4033         sethi %gdop_hix22(foo), %g1
4034         xor    %g1, %gdop_lox10(foo), %g1
4035         ld    [[%l7 + %g1]], %g2, %gdop(foo)],
4036       [if test x$gcc_cv_ld != x \
4037        && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
4038          if test x$gcc_cv_objdump != x; then
4039            if $gcc_cv_objdump -s -j .text conftest 2> /dev/null \
4040               | grep ' 03000004 82186004 c405c001'> /dev/null 2>&1; then
4041                gcc_cv_as_sparc_gotdata_op=no
4042            else
4043                gcc_cv_as_sparc_gotdata_op=yes
4044            fi
4045          fi
4046        fi
4047        rm -f conftest],
4048       [AC_DEFINE(HAVE_AS_SPARC_GOTDATA_OP, 1,
4049                 [Define if your assembler and linker support GOTDATA_OP relocs.])])
4050
4051     gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs],
4052       gcc_cv_as_sparc_ua_pcrel,,
4053       [-K PIC],
4054 [.text
4055 foo:
4056         nop
4057 .data
4058 .align 4
4059 .byte 0
4060 .uaword %r_disp32(foo)],
4061       [if test x$gcc_cv_ld != x \
4062        && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
4063          gcc_cv_as_sparc_ua_pcrel=yes
4064        fi
4065        rm -f conftest],
4066       [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
4067                 [Define if your assembler and linker support unaligned PC relative relocs.])
4068
4069       gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs against hidden symbols],
4070         gcc_cv_as_sparc_ua_pcrel_hidden,,
4071         [-K PIC],
4072 [.data
4073 .align 4
4074 .byte 0x31
4075 .uaword %r_disp32(foo)
4076 .byte 0x32, 0x33, 0x34
4077 .global foo
4078 .hidden foo
4079 foo:
4080 .skip 4],
4081         [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
4082          && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1 \
4083          && $gcc_cv_objdump -s -j .data conftest 2> /dev/null \
4084             | grep ' 31000000 07323334' > /dev/null 2>&1; then
4085             if $gcc_cv_objdump -R conftest 2> /dev/null \
4086                | grep 'DISP32' > /dev/null 2>&1; then
4087                 :
4088             else
4089                 gcc_cv_as_sparc_ua_pcrel_hidden=yes
4090             fi
4091          fi
4092          rm -f conftest],
4093          [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL_HIDDEN, 1,
4094                    [Define if your assembler and linker support unaligned PC relative relocs against hidden symbols.])])
4095     ]) # unaligned pcrel relocs
4096
4097     gcc_GAS_CHECK_FEATURE([offsetable %lo()],
4098       gcc_cv_as_sparc_offsetable_lo10,,
4099       [-xarch=v9],
4100 [.text
4101         or %g1, %lo(ab) + 12, %g1
4102         or %g1, %lo(ab + 12), %g1],
4103       [if test x$gcc_cv_objdump != x \
4104        && $gcc_cv_objdump -s -j .text conftest.o 2> /dev/null \
4105           | grep ' 82106000 82106000' > /dev/null 2>&1; then
4106          gcc_cv_as_sparc_offsetable_lo10=yes
4107        fi],
4108        [AC_DEFINE(HAVE_AS_OFFSETABLE_LO10, 1,
4109                  [Define if your assembler supports offsetable %lo().])])
4110
4111     gcc_GAS_CHECK_FEATURE([FMAF, HPC, and VIS 3.0 instructions],
4112       gcc_cv_as_sparc_fmaf,,
4113       [-xarch=v9d],
4114       [.text
4115        .register %g2, #scratch
4116        .register %g3, #scratch
4117        .align 4
4118        fmaddd %f0, %f2, %f4, %f6
4119        addxccc %g1, %g2, %g3
4120        fsrl32 %f2, %f4, %f8
4121        fnaddd %f10, %f12, %f14],,
4122       [AC_DEFINE(HAVE_AS_FMAF_HPC_VIS3, 1,
4123                 [Define if your assembler supports FMAF, HPC, and VIS 3.0 instructions.])])
4124
4125     gcc_GAS_CHECK_FEATURE([SPARC4 instructions],
4126       gcc_cv_as_sparc_sparc4,,
4127       [-xarch=sparc4],
4128       [.text
4129        .register %g2, #scratch
4130        .register %g3, #scratch
4131        .align 4
4132        cxbe %g2, %g3, 1f
4133 1:     cwbneg %g2, %g3, 1f
4134 1:     sha1
4135        md5
4136        aes_kexpand0 %f4, %f6, %f8
4137        des_round %f38, %f40, %f42, %f44
4138        camellia_f %f54, %f56, %f58, %f60
4139        kasumi_fi_xor %f46, %f48, %f50, %f52],,
4140       [AC_DEFINE(HAVE_AS_SPARC4, 1,
4141                 [Define if your assembler supports SPARC4 instructions.])])
4142
4143     gcc_GAS_CHECK_FEATURE([SPARC5 and VIS 4.0 instructions],
4144       gcc_cv_as_sparc_sparc5,,
4145       [-xarch=sparc5],
4146       [.text
4147        .register %g2, #scratch
4148        .register %g3, #scratch
4149        .align 4
4150        subxc %g1, %g2, %g3
4151        fpadd8 %f0, %f2, %f4],,
4152       [AC_DEFINE(HAVE_AS_SPARC5_VIS4, 1,
4153                 [Define if your assembler supports SPARC5 and VIS 4.0 instructions.])])
4154
4155     gcc_GAS_CHECK_FEATURE([SPARC6 instructions],
4156       gcc_cv_as_sparc_sparc6,,
4157       [-xarch=sparc6],
4158       [.text
4159        .register %g2, #scratch
4160        .register %g3, #scratch
4161        .align 4
4162        rd %entropy, %g1
4163        fpsll64x %f0, %f2, %f4],,
4164       [AC_DEFINE(HAVE_AS_SPARC6, 1,
4165                 [Define if your assembler supports SPARC6 instructions.])])
4166
4167     gcc_GAS_CHECK_FEATURE([LEON instructions],
4168       gcc_cv_as_sparc_leon,,
4169       [-Aleon],
4170       [.text
4171        .register %g2, #scratch
4172        .register %g3, #scratch
4173        .align 4
4174        smac %g2, %g3, %g1
4175        umac %g2, %g3, %g1
4176        casa [[%g2]] 0xb, %g3, %g1],,
4177       [AC_DEFINE(HAVE_AS_LEON, 1,
4178                 [Define if your assembler supports LEON instructions.])])
4179     ;;
4180
4181 changequote(,)dnl
4182   i[34567]86-*-* | x86_64-*-*)
4183 changequote([,])dnl
4184     case $target_os in
4185       cygwin*)
4186         # Full C++ conformance when using a shared libstdc++-v3 requires some
4187         # support from the Cygwin DLL, which in more recent versions exports
4188         # wrappers to aid in interposing and redirecting operators new, delete,
4189         # etc., as per n2800 #17.6.4.6 [replacement.functions].  Check if we
4190         # are configuring for a version of Cygwin that exports the wrappers.
4191         if test x$host = x$target && test x$host_cpu = xi686; then
4192           AC_CHECK_FUNC([__wrap__Znaj],[gcc_ac_cygwin_dll_wrappers=yes],[gcc_ac_cygwin_dll_wrappers=no])
4193         else
4194           # Can't check presence of libc functions during cross-compile, so
4195           # we just have to assume we're building for an up-to-date target.
4196           gcc_ac_cygwin_dll_wrappers=yes
4197         fi
4198         AC_DEFINE_UNQUOTED(USE_CYGWIN_LIBSTDCXX_WRAPPERS,
4199           [`if test $gcc_ac_cygwin_dll_wrappers = yes; then echo 1; else echo 0; fi`],
4200           [Define if you want to generate code by default that assumes that the
4201            Cygwin DLL exports wrappers to support libstdc++ function replacement.])
4202     esac
4203     case $target_os in
4204       cygwin* | pe | mingw32*)
4205         # Recent binutils allows the three-operand form of ".comm" on PE.  This
4206         # definition is used unconditionally to initialise the default state of
4207         # the target option variable that governs usage of the feature.
4208         gcc_GAS_CHECK_FEATURE([.comm with alignment], gcc_cv_as_comm_has_align,
4209          [2,19,52],,[.comm foo,1,32])
4210         AC_DEFINE_UNQUOTED(HAVE_GAS_ALIGNED_COMM,
4211           [`if test $gcc_cv_as_comm_has_align = yes; then echo 1; else echo 0; fi`],
4212           [Define if your assembler supports specifying the alignment
4213            of objects allocated using the GAS .comm command.])
4214         # Used for DWARF 2 in PE
4215         gcc_GAS_CHECK_FEATURE([.secrel32 relocs],
4216           gcc_cv_as_ix86_pe_secrel32,
4217           [2,15,91],,
4218 [.text
4219 foo:    nop
4220 .data
4221         .secrel32 foo],
4222           [if test x$gcc_cv_ld != x \
4223            && $gcc_cv_ld -o conftest conftest.o > /dev/null 2>&1; then
4224              gcc_cv_as_ix86_pe_secrel32=yes
4225            fi
4226            rm -f conftest],
4227           [AC_DEFINE(HAVE_GAS_PE_SECREL32_RELOC, 1,
4228             [Define if your assembler and linker support 32-bit section relative relocs via '.secrel32 label'.])])
4229         # Test if the assembler supports the extended form of the .section
4230         # directive that specifies section alignment.  LTO support uses this,
4231         # but normally only after installation, so we warn but don't fail the
4232         # configure if LTO is enabled but the assembler does not support it.
4233         gcc_GAS_CHECK_FEATURE([.section with alignment], gcc_cv_as_section_has_align,
4234           [2,20,1],-fatal-warnings,[.section lto_test,"dr0"])
4235         if test x$gcc_cv_as_section_has_align != xyes; then
4236           case ",$enable_languages," in
4237             *,lto,*)
4238               AC_MSG_WARN([LTO for $target requires binutils >= 2.20.1, but version found appears insufficient; LTO will not work until binutils is upgraded.])
4239               ;;
4240           esac
4241         fi
4242         ;;
4243     esac
4244
4245     gcc_GAS_CHECK_FEATURE([-xbrace_comment], gcc_cv_as_ix86_xbrace_comment,,
4246       [-xbrace_comment=no], [.text],,
4247       [AC_DEFINE(HAVE_AS_XBRACE_COMMENT_OPTION, 1,
4248                 [Define if your assembler supports -xbrace_comment option.])])
4249
4250     gcc_GAS_CHECK_FEATURE([filds and fists mnemonics],
4251        gcc_cv_as_ix86_filds,,,
4252        [filds (%ebp); fists (%ebp)],,
4253        [AC_DEFINE(HAVE_AS_IX86_FILDS, 1,
4254          [Define if your assembler uses filds and fists mnemonics.])])
4255
4256     gcc_GAS_CHECK_FEATURE([fildq and fistpq mnemonics],
4257        gcc_cv_as_ix86_fildq,,,
4258        [fildq (%ebp); fistpq (%ebp)],,
4259        [AC_DEFINE(HAVE_AS_IX86_FILDQ, 1,
4260          [Define if your assembler uses fildq and fistq mnemonics.])])
4261
4262     gcc_GAS_CHECK_FEATURE([cmov syntax],
4263       gcc_cv_as_ix86_cmov_sun_syntax,,,
4264       [cmovl.l %edx, %eax],,
4265       [AC_DEFINE(HAVE_AS_IX86_CMOV_SUN_SYNTAX, 1,
4266         [Define if your assembler supports the Sun syntax for cmov.])])
4267
4268     gcc_GAS_CHECK_FEATURE([ffreep mnemonic],
4269       gcc_cv_as_ix86_ffreep,,,
4270       [ffreep %st(1)],,
4271       [AC_DEFINE(HAVE_AS_IX86_FFREEP, 1,
4272         [Define if your assembler supports the ffreep mnemonic.])])
4273
4274     gcc_GAS_CHECK_FEATURE([.quad directive],
4275       gcc_cv_as_ix86_quad,,,
4276       [.quad 0],,
4277       [AC_DEFINE(HAVE_AS_IX86_QUAD, 1,
4278         [Define if your assembler supports the .quad directive.])])
4279
4280     gcc_GAS_CHECK_FEATURE([sahf mnemonic],
4281       gcc_cv_as_ix86_sahf,,,
4282       [.code64
4283        sahf],,
4284       [AC_DEFINE(HAVE_AS_IX86_SAHF, 1,
4285         [Define if your assembler supports the sahf mnemonic in 64bit mode.])])
4286
4287     gcc_GAS_CHECK_FEATURE([interunit movq mnemonic],
4288       gcc_cv_as_ix86_interunit_movq,,,
4289       [.code64
4290        movq %mm0, %rax
4291        movq %rax, %xmm0])
4292     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_INTERUNIT_MOVQ,
4293       [`if test $gcc_cv_as_ix86_interunit_movq = yes; then echo 1; else echo 0; fi`],
4294       [Define if your assembler supports interunit movq mnemonic.])
4295
4296     gcc_GAS_CHECK_FEATURE([hle prefixes],
4297       gcc_cv_as_ix86_hle,,,
4298       [lock xacquire cmpxchg %esi, (%ecx)],,
4299       [AC_DEFINE(HAVE_AS_IX86_HLE, 1,
4300         [Define if your assembler supports HLE prefixes.])])
4301
4302     gcc_GAS_CHECK_FEATURE([swap suffix],
4303       gcc_cv_as_ix86_swap,,,
4304       [movl.s %esp, %ebp],,
4305       [AC_DEFINE(HAVE_AS_IX86_SWAP, 1,
4306         [Define if your assembler supports the swap suffix.])])
4307
4308     gcc_GAS_CHECK_FEATURE([different section symbol subtraction],
4309       gcc_cv_as_ix86_diff_sect_delta,,,
4310       [.section .rodata
4311 .L1:
4312         .long .L2-.L1
4313         .long .L3-.L1
4314         .text
4315 .L3:    nop
4316 .L2:    nop],,
4317       [AC_DEFINE(HAVE_AS_IX86_DIFF_SECT_DELTA, 1,
4318         [Define if your assembler supports the subtraction of symbols in different sections.])])
4319
4320     gcc_GAS_CHECK_FEATURE([rep and lock prefix],
4321         gcc_cv_as_ix86_rep_lock_prefix,,,
4322         [rep movsl
4323          rep ret
4324          rep nop
4325          rep bsf %ecx, %eax
4326          rep bsr %ecx, %eax
4327          lock addl %edi, (%eax,%esi)
4328          lock orl $0, (%esp)],,
4329         [AC_DEFINE(HAVE_AS_IX86_REP_LOCK_PREFIX, 1,
4330           [Define if the assembler supports 'rep <insn>, lock <insn>'.])])
4331
4332     gcc_GAS_CHECK_FEATURE([ud2 mnemonic],
4333         gcc_cv_as_ix86_ud2,,,
4334         [ud2],,
4335       [AC_DEFINE(HAVE_AS_IX86_UD2, 1,
4336         [Define if your assembler supports the 'ud2' mnemonic.])])
4337
4338     # Enforce 32-bit output with gas and gld.
4339     if test x$gas = xyes; then
4340       as_ix86_gas_32_opt="--32"
4341     fi
4342     if echo "$ld_ver" | grep GNU > /dev/null; then
4343       if $gcc_cv_ld -V 2>/dev/null | grep elf_i386_sol2 > /dev/null; then
4344         ld_ix86_gld_32_opt="-melf_i386_sol2"
4345       else
4346         ld_ix86_gld_32_opt="-melf_i386"
4347       fi
4348     fi
4349
4350     gcc_GAS_CHECK_FEATURE([R_386_TLS_GD_PLT reloc],
4351         gcc_cv_as_ix86_tlsgdplt,,
4352         [$as_ix86_gas_32_opt],
4353         [call    tls_gd@tlsgdplt],
4354         [if test x$gcc_cv_ld != x \
4355          && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o -G > /dev/null 2>&1; then
4356            gcc_cv_as_ix86_tlsgdplt=yes
4357          fi
4358          rm -f conftest],
4359       [AC_DEFINE(HAVE_AS_IX86_TLSGDPLT, 1,
4360         [Define if your assembler and linker support @tlsgdplt.])])
4361
4362     conftest_s='
4363         .section .tdata,"aw'$tls_section_flag'",@progbits
4364 tls_ld:
4365         .section .text,"ax",@progbits
4366          call    tls_ld@tlsldmplt'
4367
4368     gcc_GAS_CHECK_FEATURE([R_386_TLS_LDM_PLT reloc],
4369         gcc_cv_as_ix86_tlsldmplt,,
4370         [$as_ix86_gas_32_opt],
4371         [$conftest_s],
4372         [if test x$gcc_cv_ld != x \
4373          && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o -G > /dev/null 2>&1; then
4374            gcc_cv_as_ix86_tlsldmplt=yes
4375          fi
4376          rm -f conftest])
4377     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_TLSLDMPLT,
4378       [`if test $gcc_cv_as_ix86_tlsldmplt = yes; then echo 1; else echo 0; fi`],
4379       [Define to 1 if your assembler and linker support @tlsldmplt.])
4380
4381     conftest_s='
4382         .section .text,"ax",@progbits
4383         .globl  _start
4384         .type   _start, @function
4385 _start:
4386         leal    value@tlsldm(%ebx), %eax
4387         call    ___tls_get_addr@plt
4388
4389         .section .tdata,"aw'$tls_section_flag'",@progbits
4390         .type   value, @object
4391 value:'
4392     gcc_GAS_CHECK_FEATURE([R_386_TLS_LDM reloc],
4393         gcc_cv_as_ix86_tlsldm,,
4394         [$as_ix86_gas_32_opt],
4395         [$conftest_s],
4396         [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
4397             && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o $ld_tls_libs -lc > /dev/null 2>&1; then
4398            if $gcc_cv_objdump -d conftest 2>/dev/null | grep nop > /dev/null \
4399               || dis conftest 2>/dev/null | grep nop > /dev/null; then
4400              gcc_cv_as_ix86_tlsldm=yes
4401            fi
4402          fi
4403          rm -f conftest])
4404     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_TLSLDM,
4405       [`if test $gcc_cv_as_ix86_tlsldm = yes; then echo 1; else echo 0; fi`],
4406       [Define to 1 if your assembler and linker support @tlsldm.])
4407
4408     conftest_s='
4409         .data
4410 bar:
4411         .byte 1
4412         .text
4413         .global _start
4414 _start:
4415          cmpl $0, bar@GOT
4416          jmp *_start@GOT'
4417     gcc_GAS_CHECK_FEATURE([R_386_GOT32X reloc],
4418         gcc_cv_as_ix86_got32x,,
4419         [$as_ix86_gas_32_opt],
4420         [$conftest_s],
4421         [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
4422             && test x$gcc_cv_readelf != x \
4423             && $gcc_cv_readelf --relocs --wide conftest.o 2>&1 \
4424                | grep R_386_GOT32X > /dev/null 2>&1 \
4425             && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o > /dev/null 2>&1; then
4426            if $gcc_cv_objdump -dw conftest 2>&1 \
4427               | grep 0xffffff > /dev/null 2>&1; then
4428              gcc_cv_as_ix86_got32x=no
4429            else
4430              gcc_cv_as_ix86_got32x=yes
4431            fi
4432          fi
4433          rm -f conftest])
4434     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_GOT32X,
4435       [`if test x"$gcc_cv_as_ix86_got32x" = xyes; then echo 1; else echo 0; fi`],
4436       [Define 0/1 if your assembler and linker support @GOT.])
4437
4438     gcc_GAS_CHECK_FEATURE([GOTOFF in data],
4439       gcc_cv_as_ix86_gotoff_in_data, [2,11,0],
4440       [$as_ix86_gas_32_opt],
4441 [       .text
4442 .L0:
4443         nop
4444         .data
4445         .long .L0@GOTOFF])
4446     AC_DEFINE_UNQUOTED(HAVE_AS_GOTOFF_IN_DATA,
4447       [`if test $gcc_cv_as_ix86_gotoff_in_data = yes; then echo 1; else echo 0; fi`],
4448       [Define true if the assembler supports '.long foo@GOTOFF'.])
4449
4450     conftest_s='
4451         .section .text,"ax",@progbits
4452         .globl  _start
4453         .type   _start, @function
4454 _start:
4455         leal    ld@tlsldm(%ecx), %eax
4456         call    *___tls_get_addr@GOT(%ecx)
4457         leal    gd@tlsgd(%ecx), %eax
4458         call    *___tls_get_addr@GOT(%ecx)
4459
4460         .section .tdata,"aw'$tls_section_flag'",@progbits
4461         .type   ld, @object
4462 ld:
4463         .byte 0
4464         .globl  gd
4465         .type   gd, @object
4466 gd:
4467         .byte 0'
4468     gcc_GAS_CHECK_FEATURE([calling ___tls_get_addr via GOT],
4469         gcc_cv_as_ix86_tls_get_addr_via_got,,
4470         [$as_ix86_gas_32_opt],
4471         [$conftest_s],
4472         [if test x$gcc_cv_ld != x \
4473             && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o > /dev/null 2>&1; then
4474            gcc_cv_as_ix86_tls_get_addr_via_got=yes
4475          fi
4476          rm -f conftest])
4477     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_TLS_GET_ADDR_GOT,
4478       [`if test x"$gcc_cv_as_ix86_tls_get_addr_via_got" = xyes; then echo 1; else echo 0; fi`],
4479       [Define 0/1 if your assembler and linker support calling ___tls_get_addr via GOT.])
4480     ;;
4481
4482   ia64*-*-*)
4483     gcc_GAS_CHECK_FEATURE([ltoffx and ldxmov relocs],
4484         gcc_cv_as_ia64_ltoffx_ldxmov_relocs, [2,14,0],,
4485 [       .text
4486         addl r15 = @ltoffx(x#), gp
4487         ;;
4488         ld8.mov r16 = [[r15]], x#],,
4489     [AC_DEFINE(HAVE_AS_LTOFFX_LDXMOV_RELOCS, 1,
4490           [Define if your assembler supports ltoffx and ldxmov relocations.])])
4491
4492     ;;
4493
4494   powerpc*-*-*)
4495
4496     case $target in
4497       *-*-darwin*)
4498         gcc_GAS_CHECK_FEATURE([.machine directive support],
4499           gcc_cv_as_machine_directive,,,
4500           [     .machine ppc7400])
4501         if test x$gcc_cv_as_machine_directive != xyes; then
4502           echo "*** This target requires an assembler supporting \".machine\"" >&2
4503           echo you can get it from: ftp://gcc.gnu.org/pub/gcc/infrastructure/cctools-528.5.dmg >&2
4504           test x$build = x$target && exit 1
4505         fi
4506         ;;
4507     esac
4508
4509     case $target in
4510       *-*-aix*) conftest_s='    .machine "pwr5"
4511         .csect .text[[PR]]
4512         mfcr 3,128';;
4513       *-*-darwin*) conftest_s=' .text
4514         mfcr r3,128';;
4515       *) conftest_s='   .machine power4
4516         .text
4517         mfcr 3,128';;
4518     esac
4519
4520     gcc_GAS_CHECK_FEATURE([mfcr field support],
4521       gcc_cv_as_powerpc_mfcrf, [2,14,0],,
4522       [$conftest_s],,
4523       [AC_DEFINE(HAVE_AS_MFCRF, 1,
4524           [Define if your assembler supports mfcr field.])])
4525
4526     case $target in
4527       *-*-aix*) conftest_s='    .csect .text[[PR]]
4528 LCF..0:
4529         addis 11,30,_GLOBAL_OFFSET_TABLE_-LCF..0@ha';;
4530       *-*-darwin*)
4531         conftest_s='    .text
4532 LCF0:
4533         addis r11,r30,_GLOBAL_OFFSET_TABLE_-LCF0@ha';;
4534       *) conftest_s='   .text
4535 .LCF0:
4536         addis 11,30,_GLOBAL_OFFSET_TABLE_-.LCF0@ha';;
4537     esac
4538
4539     gcc_GAS_CHECK_FEATURE([rel16 relocs],
4540       gcc_cv_as_powerpc_rel16, [2,17,0], -a32,
4541       [$conftest_s],,
4542       [AC_DEFINE(HAVE_AS_REL16, 1,
4543           [Define if your assembler supports R_PPC_REL16 relocs.])])
4544
4545     case $target in
4546       *-*-aix*) conftest_s='    .machine "pwr7"
4547         .csect .text[[PR]]
4548         lxvd2x 1,2,3';;
4549       *) conftest_s='   .machine power7
4550         .text
4551         lxvd2x 1,2,3';;
4552     esac
4553
4554     gcc_GAS_CHECK_FEATURE([vector-scalar support],
4555       gcc_cv_as_powerpc_vsx, [2,19,2], -a32,
4556       [$conftest_s],,
4557       [AC_DEFINE(HAVE_AS_VSX, 1,
4558           [Define if your assembler supports VSX instructions.])])
4559
4560     case $target in
4561       *-*-aix*) conftest_s='    .machine "476"
4562         .csect .text[[PR]]
4563         dci 0';;
4564       *) conftest_s='   .machine "476"
4565         .text
4566         dci 0';;
4567     esac
4568
4569     gcc_GAS_CHECK_FEATURE([data cache invalidate support],
4570       gcc_cv_as_powerpc_dci, [9,99,0], -a32,
4571       [$conftest_s],,
4572       [AC_DEFINE(HAVE_AS_DCI, 1,
4573           [Define if your assembler supports the DCI/ICI instructions.])])
4574
4575     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
4576       gcc_cv_as_powerpc_gnu_attribute, [2,18,0],,
4577       [.gnu_attribute 4,1],,
4578       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
4579           [Define if your assembler supports .gnu_attribute.])])
4580
4581     gcc_GAS_CHECK_FEATURE([tls marker support],
4582       gcc_cv_as_powerpc_tls_markers, [2,20,0],,
4583       [ bl __tls_get_addr(x@tlsgd)],,
4584       [AC_DEFINE(HAVE_AS_TLS_MARKERS, 1,
4585           [Define if your assembler supports arg info for __tls_get_addr.])])
4586
4587     gcc_GAS_CHECK_FEATURE([prologue entry point marker support],
4588       gcc_cv_as_powerpc_entry_markers, [2,26,0],-a64 --fatal-warnings,
4589       [ .reloc .,R_PPC64_ENTRY; nop],,
4590       [AC_DEFINE(HAVE_AS_ENTRY_MARKERS, 1,
4591           [Define if your assembler supports the R_PPC64_ENTRY relocation.])])
4592
4593     case $target in
4594       *-*-aix*)
4595         gcc_GAS_CHECK_FEATURE([AIX .ref support],
4596           gcc_cv_as_aix_ref, [2,21,0],,
4597           [     .csect stuff[[rw]]
4598              stuff:
4599                 .long 1
4600                 .extern sym
4601                 .ref sym
4602           ],,
4603           [AC_DEFINE(HAVE_AS_REF, 1,
4604             [Define if your assembler supports .ref])])
4605
4606         gcc_GAS_CHECK_FEATURE([AIX DWARF location lists section support],
4607           gcc_cv_as_aix_dwloc, [2,21,0],,
4608           [     .dwsect 0xA0000
4609         Lframe..0:
4610                 .vbyte 4,Lframe..0
4611           ],,
4612           [AC_DEFINE(HAVE_XCOFF_DWARF_EXTRAS, 1,
4613             [Define if your assembler supports AIX debug frame section label reference.])])
4614         ;;
4615     esac
4616     ;;
4617
4618   mips*-*-*)
4619     gcc_GAS_CHECK_FEATURE([explicit relocation support],
4620       gcc_cv_as_mips_explicit_relocs, [2,14,0],,
4621 [       lw $4,%gp_rel(foo)($4)],,
4622       [if test x$target_cpu_default = x
4623        then target_cpu_default=MASK_EXPLICIT_RELOCS
4624        else target_cpu_default="($target_cpu_default)|MASK_EXPLICIT_RELOCS"
4625        fi])
4626
4627     gcc_GAS_CHECK_FEATURE([-mno-shared support],
4628       gcc_cv_as_mips_no_shared, [2,16,0], [-mno-shared], [nop],,
4629       [AC_DEFINE(HAVE_AS_NO_SHARED, 1,
4630                  [Define if the assembler understands -mno-shared.])])
4631
4632     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
4633       gcc_cv_as_mips_gnu_attribute, [2,18,0],,
4634       [.gnu_attribute 4,1],,
4635       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
4636           [Define if your assembler supports .gnu_attribute.])])
4637
4638     gcc_GAS_CHECK_FEATURE([.module support],
4639       gcc_cv_as_mips_dot_module,,[-32],
4640       [.module mips2
4641        .module fp=xx],,
4642       [AC_DEFINE(HAVE_AS_DOT_MODULE, 1,
4643           [Define if your assembler supports .module.])])
4644     if test x$gcc_cv_as_mips_dot_module = xno \
4645        && test x$with_fp_32 != x; then
4646       AC_MSG_ERROR(
4647         [Requesting --with-fp-32= requires assembler support for .module.])
4648     fi
4649
4650     gcc_GAS_CHECK_FEATURE([.micromips support],
4651       gcc_cv_as_micromips_support,,[--fatal-warnings],
4652       [.set micromips],,
4653       [AC_DEFINE(HAVE_GAS_MICROMIPS, 1,
4654           [Define if your assembler supports the .set micromips directive])])
4655
4656     gcc_GAS_CHECK_FEATURE([.dtprelword support],
4657       gcc_cv_as_mips_dtprelword, [2,18,0],,
4658       [.section .tdata,"awT",@progbits
4659 x:
4660         .word 2
4661         .text
4662         .dtprelword x+0x8000],,
4663       [AC_DEFINE(HAVE_AS_DTPRELWORD, 1,
4664           [Define if your assembler supports .dtprelword.])])
4665
4666     gcc_GAS_CHECK_FEATURE([DSPR1 mult with four accumulators support],
4667       gcc_cv_as_mips_dspr1_mult,,,
4668 [       .set    mips32r2
4669         .set    nodspr2
4670         .set    dsp
4671         madd    $ac3,$4,$5
4672         maddu   $ac3,$4,$5
4673         msub    $ac3,$4,$5
4674         msubu   $ac3,$4,$5
4675         mult    $ac3,$4,$5
4676         multu   $ac3,$4,$5],,
4677       [AC_DEFINE(HAVE_AS_DSPR1_MULT, 1,
4678           [Define if your assembler supports DSPR1 mult.])])
4679
4680     AC_MSG_CHECKING(assembler and linker for explicit JALR relocation)
4681     gcc_cv_as_ld_jalr_reloc=no
4682     if test $gcc_cv_as_mips_explicit_relocs = yes; then
4683       if test $in_tree_ld = yes ; then
4684         if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 20 -o "$gcc_cv_gld_major_version" -gt 2 \
4685            && test $in_tree_ld_is_elf = yes; then
4686           gcc_cv_as_ld_jalr_reloc=yes
4687         fi
4688       elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x; then
4689         echo '  .ent x' > conftest.s
4690         echo 'x:        lw $2,%got_disp(y)($3)' >> conftest.s
4691         echo '  lw $25,%call16(y)($28)' >> conftest.s
4692         echo '  .reloc  1f,R_MIPS_JALR,y' >> conftest.s
4693         echo '1:        jalr $25' >> conftest.s
4694         echo '  .reloc  1f,R_MIPS_JALR,x' >> conftest.s
4695         echo '1:        jalr $25' >> conftest.s
4696         echo '  .end x' >> conftest.s
4697         if $gcc_cv_as -o conftest.o conftest.s >/dev/null 2>&AS_MESSAGE_LOG_FD \
4698            && $gcc_cv_ld -shared -o conftest.so conftest.o >/dev/null 2>&AS_MESSAGE_LOG_FD; then
4699           if $gcc_cv_objdump -d conftest.so | grep jalr >/dev/null 2>&1 \
4700              && $gcc_cv_objdump -d conftest.so | grep "bal.*<x>" >/dev/null 2>&1; then
4701             gcc_cv_as_ld_jalr_reloc=yes
4702           fi
4703         fi
4704         rm -f conftest.*
4705       fi
4706     fi
4707     if test $gcc_cv_as_ld_jalr_reloc = yes; then
4708       if test x$target_cpu_default = x; then
4709         target_cpu_default=MASK_RELAX_PIC_CALLS
4710       else
4711         target_cpu_default="($target_cpu_default)|MASK_RELAX_PIC_CALLS"
4712       fi
4713     fi
4714     AC_MSG_RESULT($gcc_cv_as_ld_jalr_reloc)
4715
4716     AC_CACHE_CHECK([linker for .eh_frame personality relaxation],
4717       [gcc_cv_ld_mips_personality_relaxation],
4718       [gcc_cv_ld_mips_personality_relaxation=no
4719        if test $in_tree_ld = yes ; then
4720          if test "$gcc_cv_gld_major_version" -eq 2 \
4721                  -a "$gcc_cv_gld_minor_version" -ge 21 \
4722                  -o "$gcc_cv_gld_major_version" -gt 2; then
4723            gcc_cv_ld_mips_personality_relaxation=yes
4724          fi
4725        elif test x$gcc_cv_as != x \
4726                  -a x$gcc_cv_ld != x \
4727                  -a x$gcc_cv_readelf != x ; then
4728          cat > conftest.s <<EOF
4729         .cfi_startproc
4730         .cfi_personality 0x80,indirect_ptr
4731         .ent test
4732 test:
4733         nop
4734         .end test
4735         .cfi_endproc
4736
4737         .section .data,"aw",@progbits
4738 indirect_ptr:
4739         .dc.a personality
4740 EOF
4741          if $gcc_cv_as -KPIC -o conftest.o conftest.s > /dev/null 2>&1 \
4742             && $gcc_cv_ld -o conftest conftest.o -shared > /dev/null 2>&1; then
4743            if $gcc_cv_readelf -d conftest 2>&1 \
4744               | grep TEXTREL > /dev/null 2>&1; then
4745              :
4746            elif $gcc_cv_readelf --relocs conftest 2>&1 \
4747                 | grep 'R_MIPS_REL32 *$' > /dev/null 2>&1; then
4748              :
4749            else
4750              gcc_cv_ld_mips_personality_relaxation=yes
4751            fi
4752          fi
4753        fi
4754        rm -f conftest.s conftest.o conftest])
4755     if test x$gcc_cv_ld_mips_personality_relaxation = xyes; then
4756             AC_DEFINE(HAVE_LD_PERSONALITY_RELAXATION, 1,
4757       [Define if your linker can relax absolute .eh_frame personality
4758 pointers into PC-relative form.])
4759     fi
4760
4761     gcc_GAS_CHECK_FEATURE([-mnan= support],
4762       gcc_cv_as_mips_nan,,
4763       [-mnan=2008],,,
4764       [AC_DEFINE(HAVE_AS_NAN, 1,
4765                  [Define if the assembler understands -mnan=.])])
4766     if test x$gcc_cv_as_mips_nan = xno \
4767        && test x$with_nan != x; then
4768       AC_MSG_ERROR(
4769         [Requesting --with-nan= requires assembler support for -mnan=])
4770     fi
4771     ;;
4772     s390*-*-*)
4773     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
4774       gcc_cv_as_s390_gnu_attribute, [2,18,0],,
4775       [.gnu_attribute 8,1],,
4776       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
4777           [Define if your assembler supports .gnu_attribute.])])
4778     gcc_GAS_CHECK_FEATURE([.machine and .machinemode support],
4779       gcc_cv_as_s390_machine_machinemode, [2,24,0],,
4780       [ .machinemode push
4781         .machinemode pop
4782         .machine push
4783         .machine pop],,
4784       [AC_DEFINE(HAVE_AS_MACHINE_MACHINEMODE, 1,
4785           [Define if your assembler supports .machine and .machinemode.])])
4786     gcc_GAS_CHECK_FEATURE([architecture modifiers support],
4787       gcc_cv_as_s390_architecture_modifiers, [2,26,0],,
4788       [ .machine z13+vx ],,
4789       [AC_DEFINE(HAVE_AS_ARCHITECTURE_MODIFIERS, 1,
4790           [Define if your assembler supports architecture modifiers.])])
4791     ;;
4792 esac
4793
4794 # Mips and HP-UX need the GNU assembler.
4795 # Linux on IA64 might be able to use the Intel assembler.
4796
4797 case "$target" in
4798   mips*-*-* | *-*-hpux* )
4799     if test x$gas_flag = xyes \
4800        || test x"$host" != x"$build" \
4801        || test ! -x "$gcc_cv_as" \
4802        || "$gcc_cv_as" -v < /dev/null 2>&1 | grep GNU > /dev/null; then
4803       :
4804     else
4805       echo "*** This configuration requires the GNU assembler" >&2
4806       exit 1
4807     fi
4808     ;;
4809 esac
4810
4811 # ??? Not all targets support dwarf2 debug_line, even within a version
4812 # of gas.  Moreover, we need to emit a valid instruction to trigger any
4813 # info to the output file.  So, as supported targets are added to gas 2.11,
4814 # add some instruction here to (also) show we expect this might work.
4815 # ??? Once 2.11 is released, probably need to add first known working
4816 # version to the per-target configury.
4817 case "$cpu_type" in
4818   aarch64 | alpha | arc | arm | avr | bfin | cris | csky | i386 | m32c | m68k \
4819   | microblaze | mips | nios2 | pa | riscv | rs6000 | score | sparc | spu \
4820   | tilegx | tilepro | visium | xstormy16 | xtensa)
4821     insn="nop"
4822     ;;
4823   ia64 | s390)
4824     insn="nop 0"
4825     ;;
4826   mmix)
4827     insn="swym 0"
4828     ;;
4829 esac
4830 if test x"$insn" != x; then
4831  conftest_s="\
4832         .file 1 \"conftest.s\"
4833         .loc 1 3 0
4834         $insn"
4835  gcc_GAS_CHECK_FEATURE([dwarf2 debug_line support],
4836   gcc_cv_as_dwarf2_debug_line,
4837   [elf,2,11,0],, [$conftest_s],
4838   [if test x$gcc_cv_objdump != x \
4839    && $gcc_cv_objdump -h conftest.o 2> /dev/null \
4840       | grep debug_line > /dev/null 2>&1; then
4841      gcc_cv_as_dwarf2_debug_line=yes
4842    fi])
4843
4844 # The .debug_line file table must be in the exact order that
4845 # we specified the files, since these indices are also used
4846 # by DW_AT_decl_file.  Approximate this test by testing if
4847 # the assembler bitches if the same index is assigned twice.
4848  gcc_GAS_CHECK_FEATURE([buggy dwarf2 .file directive],
4849   gcc_cv_as_dwarf2_file_buggy,,,
4850 [       .file 1 "foo.s"
4851         .file 1 "bar.s"])
4852
4853  if test $gcc_cv_as_dwarf2_debug_line = yes \
4854  && test $gcc_cv_as_dwarf2_file_buggy = no; then
4855     AC_DEFINE(HAVE_AS_DWARF2_DEBUG_LINE, 1,
4856   [Define if your assembler supports dwarf2 .file/.loc directives,
4857    and preserves file table indices exactly as given.])
4858
4859     if test $gcc_cv_as_leb128 = yes; then
4860         conftest_s="\
4861         .file 1 \"conftest.s\"
4862         .loc 1 3 0 view .LVU1
4863         $insn
4864         .data
4865         .uleb128 .LVU1
4866         .uleb128 .LVU1
4867 "
4868         gcc_GAS_CHECK_FEATURE([dwarf2 debug_view support],
4869           gcc_cv_as_dwarf2_debug_view,
4870           [elf,2,27,0],,[$conftest_s],,
4871           [AC_DEFINE(HAVE_AS_DWARF2_DEBUG_VIEW, 1,
4872   [Define if your assembler supports views in dwarf2 .loc directives.])])
4873     fi
4874  fi
4875
4876  gcc_GAS_CHECK_FEATURE([--gdwarf2 option],
4877   gcc_cv_as_gdwarf2_flag,
4878   [elf,2,11,0], [--gdwarf2], [$insn],,
4879   [AC_DEFINE(HAVE_AS_GDWARF2_DEBUG_FLAG, 1,
4880 [Define if your assembler supports the --gdwarf2 option.])])
4881
4882  gcc_GAS_CHECK_FEATURE([--gstabs option],
4883   gcc_cv_as_gstabs_flag,
4884   [elf,2,11,0], [--gstabs], [$insn],,
4885   [AC_DEFINE(HAVE_AS_GSTABS_DEBUG_FLAG, 1,
4886 [Define if your assembler supports the --gstabs option.])])
4887
4888  gcc_GAS_CHECK_FEATURE([--debug-prefix-map option],
4889   gcc_cv_as_debug_prefix_map_flag,
4890   [2,18,0], [--debug-prefix-map /a=/b], [$insn],,
4891   [AC_DEFINE(HAVE_AS_DEBUG_PREFIX_MAP, 1,
4892 [Define if your assembler supports the --debug-prefix-map option.])])
4893 fi
4894
4895 gcc_GAS_CHECK_FEATURE([compressed debug sections],
4896   gcc_cv_as_compress_debug,,,,
4897   [# gas compiled without zlib cannot compress debug sections and warns
4898    # about it, but still exits successfully.  So check for this, too.
4899    if $gcc_cv_as --compress-debug-sections -o conftest.o conftest.s 2>&1 | grep -i warning > /dev/null
4900    then
4901      gcc_cv_as_compress_debug=0
4902    # Since binutils 2.26, gas supports --compress-debug-sections=type,
4903    # defaulting to the ELF gABI format.
4904    elif $gcc_cv_as --compress-debug-sections=zlib-gnu -o conftest.o conftest.s > /dev/null 2>&1
4905    then
4906      gcc_cv_as_compress_debug=2
4907      gcc_cv_as_compress_debug_option="--compress-debug-sections"
4908      gcc_cv_as_no_compress_debug_option="--nocompress-debug-sections"
4909    # Before binutils 2.26, gas only supported --compress-debug-options and
4910    # emitted the traditional GNU format.
4911    elif $gcc_cv_as --compress-debug-sections -o conftest.o conftest.s > /dev/null 2>&1
4912    then
4913      gcc_cv_as_compress_debug=1
4914      gcc_cv_as_compress_debug_option="--compress-debug-sections"
4915      gcc_cv_as_no_compress_debug_option="--nocompress-debug-sections"
4916    else
4917      gcc_cv_as_compress_debug=0
4918    fi])
4919 AC_DEFINE_UNQUOTED(HAVE_AS_COMPRESS_DEBUG, $gcc_cv_as_compress_debug,
4920 [Define to the level of your assembler's compressed debug section support.])
4921 AC_DEFINE_UNQUOTED(AS_COMPRESS_DEBUG_OPTION, "$gcc_cv_as_compress_debug_option",
4922 [Define to the assembler option to enable compressed debug sections.])
4923 AC_DEFINE_UNQUOTED(AS_NO_COMPRESS_DEBUG_OPTION, "$gcc_cv_as_no_compress_debug_option",
4924 [Define to the assembler option to disable compressed debug sections.])
4925
4926 gcc_GAS_CHECK_FEATURE([.lcomm with alignment], gcc_cv_as_lcomm_with_alignment,
4927  ,,
4928 [.lcomm bar,4,16],,
4929 [AC_DEFINE(HAVE_GAS_LCOMM_WITH_ALIGNMENT, 1,
4930   [Define if your assembler supports .lcomm with an alignment field.])])
4931
4932 if test x$with_sysroot = x && test x$host = x$target \
4933    && test "$prefix" != "/usr" && test "x$prefix" != "x$local_prefix" \
4934    && test "$prefix" != "NONE"; then
4935   AC_DEFINE_UNQUOTED(PREFIX_INCLUDE_DIR, "$prefix/include",
4936 [Define to PREFIX/include if cpp should also search that directory.])
4937 fi
4938
4939 # Determine the version of glibc, if any, used on the target.
4940 AC_MSG_CHECKING([for target glibc version])
4941 AC_ARG_WITH([glibc-version],
4942   [AS_HELP_STRING([--with-glibc-version=M.N],
4943     [assume GCC used with glibc version M.N or later])], [
4944 if [echo "$with_glibc_version" | grep '^[0-9][0-9]*\.[0-9][0-9]*$']; then
4945   glibc_version_major=`echo "$with_glibc_version" | sed -e 's/\..*//'`
4946   glibc_version_minor=`echo "$with_glibc_version" | sed -e 's/.*\.//'`
4947 else
4948   AC_MSG_ERROR([option --with-glibc-version requires a version number M.N])
4949 fi], [
4950 glibc_version_major=0
4951 glibc_version_minor=0
4952 [if test -f $target_header_dir/features.h \
4953   && glibc_version_major_define=`$EGREP '^[     ]*#[    ]*define[       ]+__GLIBC__[    ]+[0-9]' $target_header_dir/features.h` \
4954   && glibc_version_minor_define=`$EGREP '^[     ]*#[    ]*define[       ]+__GLIBC_MINOR__[      ]+[0-9]' $target_header_dir/features.h`; then
4955   glibc_version_major=`echo "$glibc_version_major_define" | sed -e 's/.*__GLIBC__[      ]*//'`
4956   glibc_version_minor=`echo "$glibc_version_minor_define" | sed -e 's/.*__GLIBC_MINOR__[        ]*//'`
4957 fi]])
4958 AC_MSG_RESULT([$glibc_version_major.$glibc_version_minor])
4959 AC_DEFINE_UNQUOTED([TARGET_GLIBC_MAJOR], [$glibc_version_major],
4960 [GNU C Library major version number used on the target, or 0.])
4961 AC_DEFINE_UNQUOTED([TARGET_GLIBC_MINOR], [$glibc_version_minor],
4962 [GNU C Library minor version number used on the target, or 0.])
4963
4964 AC_ARG_ENABLE(gnu-unique-object,
4965  [AS_HELP_STRING([--enable-gnu-unique-object],
4966    [enable the use of the @gnu_unique_object ELF extension on glibc systems])],
4967  [case $enable_gnu_unique_object in
4968     yes | no) ;;
4969     *) AC_MSG_ERROR(['$enable_gnu_unique_object' is an invalid value for --enable-gnu-unique-object.
4970 Valid choices are 'yes' and 'no'.]) ;;
4971   esac],
4972  [gcc_GAS_CHECK_FEATURE([gnu_unique_object], gcc_cv_as_gnu_unique_object,
4973    [elf,2,19,52],,
4974    [.type foo, '$target_type_format_char'gnu_unique_object],,
4975 # We need to unquote above to to use the definition from config.gcc.
4976 # Also check for ld.so support, i.e. glibc 2.11 or higher.
4977    [GCC_GLIBC_VERSION_GTE_IFELSE([2], [11], [enable_gnu_unique_object=yes], )]
4978    )])
4979 if test x$enable_gnu_unique_object = xyes; then
4980   AC_DEFINE(HAVE_GAS_GNU_UNIQUE_OBJECT, 1,
4981    [Define if your assembler supports @gnu_unique_object.])
4982 fi
4983
4984 AC_CACHE_CHECK([assembler for tolerance to line number 0],
4985  [gcc_cv_as_line_zero],
4986  [gcc_cv_as_line_zero=no
4987   if test $in_tree_gas = yes; then
4988     gcc_GAS_VERSION_GTE_IFELSE(2, 16, 91, [gcc_cv_as_line_zero=yes])
4989   elif test "x$gcc_cv_as" != x; then
4990     { echo '# 1 "test.s" 1'; echo '# 0 "" 2'; } > conftest.s
4991     if AC_TRY_COMMAND([$gcc_cv_as -o conftest.o conftest.s >&AS_MESSAGE_LOG_FD 2>conftest.out]) &&
4992        test "x`cat conftest.out`" = x
4993     then
4994       gcc_cv_as_line_zero=yes
4995     else
4996       echo "configure: failed program was" >&AS_MESSAGE_LOG_FD
4997       cat conftest.s >&AS_MESSAGE_LOG_FD
4998       echo "configure: error output was" >&AS_MESSAGE_LOG_FD
4999       cat conftest.out >&AS_MESSAGE_LOG_FD
5000     fi
5001     rm -f conftest.o conftest.s conftest.out
5002   fi])
5003 if test "x$gcc_cv_as_line_zero" = xyes; then
5004   AC_DEFINE([HAVE_AS_LINE_ZERO], 1,
5005 [Define if the assembler won't complain about a line such as # 0 "" 2.])
5006 fi
5007
5008 AC_MSG_CHECKING(support for thin archives)
5009 thin_archive_support=no
5010 echo 'int main (void) { return 0; }' > conftest.c
5011 if ($AR --version | sed 1q | grep "GNU ar" \
5012     && $CC $CFLAGS -c conftest.c \
5013     && $AR rcT conftest.a conftest.o \
5014     && $CC $CFLAGS $LDFLAGS -o conftest conftest.a) >/dev/null 2>&1; then
5015   thin_archive_support=yes
5016 fi
5017 rm -f conftest.c conftest.o conftest.a conftest
5018 AC_MSG_RESULT($thin_archive_support)
5019 AC_SUBST(thin_archive_support)
5020
5021 AC_MSG_CHECKING(linker PT_GNU_EH_FRAME support)
5022 gcc_cv_ld_eh_frame_hdr=no
5023 if test $in_tree_ld = yes ; then
5024   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 12 -o "$gcc_cv_gld_major_version" -gt 2 \
5025      && test $in_tree_ld_is_elf = yes; then
5026     gcc_cv_ld_eh_frame_hdr=yes
5027   fi
5028 elif test x$gcc_cv_ld != x; then
5029   if echo "$ld_ver" | grep GNU > /dev/null; then
5030     # Check if linker supports --eh-frame-hdr option
5031     if $gcc_cv_ld --help 2>&1 | grep eh-frame-hdr > /dev/null; then
5032       gcc_cv_ld_eh_frame_hdr=yes
5033     fi
5034   else
5035     case "$target" in
5036       *-*-solaris2*)
5037         # Sun ld has various bugs in .eh_frame_hdr support before version 1.2251.
5038         if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 2251; then
5039           gcc_cv_ld_eh_frame_hdr=yes
5040         fi
5041         ;;
5042     esac
5043   fi
5044 fi
5045 GCC_TARGET_TEMPLATE([HAVE_LD_EH_FRAME_HDR])
5046 if test x"$gcc_cv_ld_eh_frame_hdr" = xyes; then
5047         AC_DEFINE(HAVE_LD_EH_FRAME_HDR, 1,
5048 [Define if your linker supports .eh_frame_hdr.])
5049 fi
5050 AC_MSG_RESULT($gcc_cv_ld_eh_frame_hdr)
5051
5052 AC_MSG_CHECKING(linker CIEv3 in .eh_frame support)
5053 gcc_cv_ld_eh_frame_ciev3=no
5054 if test $in_tree_ld = yes ; then
5055   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
5056      && test $in_tree_ld_is_elf = yes; then
5057     gcc_cv_ld_eh_frame_ciev3=yes
5058   fi
5059 elif test x$gcc_cv_ld != x; then
5060   if echo "$ld_ver" | grep GNU > /dev/null; then
5061     gcc_cv_ld_eh_frame_ciev3=yes
5062     if test 0"$ld_date" -lt 20040513; then
5063       if test -n "$ld_date"; then
5064         # If there was date string, but was earlier than 2004-05-13, fail
5065         gcc_cv_ld_eh_frame_ciev3=no
5066       elif test "$ld_vers_major" -lt 2; then
5067         gcc_cv_ld_eh_frame_ciev3=no
5068       elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
5069         gcc_cv_ld_eh_frame_ciev3=no
5070       fi
5071     fi
5072   else
5073     case "$target" in
5074       *-*-solaris2*)
5075         # Sun ld added support for CIE v3 in .eh_frame in Solaris 11.1.
5076         if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 2324; then
5077           gcc_cv_ld_eh_frame_ciev3=yes
5078         fi
5079         ;;
5080     esac
5081   fi
5082 fi
5083 AC_DEFINE_UNQUOTED(HAVE_LD_EH_FRAME_CIEV3,
5084   [`if test x"$gcc_cv_ld_eh_frame_ciev3" = xyes; then echo 1; else echo 0; fi`],
5085   [Define 0/1 if your linker supports CIE v3 in .eh_frame.])
5086 AC_MSG_RESULT($gcc_cv_ld_eh_frame_ciev3)
5087
5088 AC_MSG_CHECKING(linker position independent executable support)
5089 gcc_cv_ld_pie=no
5090 if test $in_tree_ld = yes ; then
5091   case "$target" in
5092     # Full PIE support on Solaris was only introduced in gld 2.26.
5093     *-*-solaris2*)  gcc_gld_pie_min_version=26 ;;
5094     *)              gcc_gld_pie_min_version=15 ;;
5095   esac
5096   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 \
5097      && test $in_tree_ld_is_elf = yes; then
5098     gcc_cv_ld_pie=yes
5099   fi
5100 elif test x$gcc_cv_ld != x; then
5101   # Check if linker supports -pie option
5102   if $gcc_cv_ld --help 2>&1 | grep -- -pie > /dev/null; then
5103     gcc_cv_ld_pie=yes
5104     case "$target" in
5105       *-*-solaris2*)
5106         if echo "$ld_ver" | grep GNU > /dev/null \
5107           && test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 26; then
5108           gcc_cv_ld_pie=no
5109         fi
5110         ;;
5111     esac
5112   else
5113     case "$target" in
5114       *-*-solaris2.1[[1-9]]*)
5115         # Solaris 11.3 added PIE support.
5116         if $gcc_cv_ld -z help 2>&1 | grep -- type.*pie > /dev/null; then
5117           gcc_cv_ld_pie=yes
5118         fi
5119         ;;
5120     esac
5121   fi
5122 fi
5123 if test x"$gcc_cv_ld_pie" = xyes; then
5124         AC_DEFINE(HAVE_LD_PIE, 1,
5125 [Define if your linker supports PIE option.])
5126 fi
5127 AC_MSG_RESULT($gcc_cv_ld_pie)
5128
5129 AC_MSG_CHECKING(linker PIE support with copy reloc)
5130 gcc_cv_ld_pie_copyreloc=no
5131 if test $gcc_cv_ld_pie = yes ; then
5132   if test $in_tree_ld = yes ; then
5133     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 25 -o "$gcc_cv_gld_major_version" -gt 2; then
5134       gcc_cv_ld_pie_copyreloc=yes
5135     fi
5136   elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
5137     # Check if linker supports -pie option with copy reloc
5138     case "$target" in
5139     i?86-*-linux* | x86_64-*-linux*)
5140       cat > conftest1.s <<EOF
5141         .globl  a_glob
5142         .data
5143         .type   a_glob, @object
5144         .size   a_glob, 4
5145 a_glob:
5146         .long   2
5147 EOF
5148       cat > conftest2.s <<EOF
5149         .text
5150         .globl  main
5151         .type   main, @function
5152 main:
5153         movl    %eax, a_glob(%rip)
5154         .size   main, .-main
5155         .globl  ptr
5156         .section        .data.rel,"aw",@progbits
5157         .type   ptr, @object
5158 ptr:
5159         .quad   a_glob
5160 EOF
5161       if $gcc_cv_as --64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
5162          && $gcc_cv_ld -shared -melf_x86_64 -o conftest1.so conftest1.o > /dev/null 2>&1 \
5163          && $gcc_cv_as --64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
5164          && $gcc_cv_ld -pie -melf_x86_64 -o conftest conftest2.o conftest1.so > /dev/null 2>&1; then
5165         gcc_cv_ld_pie_copyreloc=yes
5166       fi
5167       rm -f conftest conftest1.so conftest1.o conftest2.o conftest1.s conftest2.s
5168       ;;
5169     esac
5170   fi
5171 fi
5172 AC_DEFINE_UNQUOTED(HAVE_LD_PIE_COPYRELOC,
5173   [`if test x"$gcc_cv_ld_pie_copyreloc" = xyes; then echo 1; else echo 0; fi`],
5174   [Define 0/1 if your linker supports -pie option with copy reloc.])
5175 AC_MSG_RESULT($gcc_cv_ld_pie_copyreloc)
5176
5177 AC_MSG_CHECKING(linker EH-compatible garbage collection of sections)
5178 gcc_cv_ld_eh_gc_sections=no
5179 if test $in_tree_ld = yes ; then
5180   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 17 -o "$gcc_cv_gld_major_version" -gt 2 \
5181      && test $in_tree_ld_is_elf = yes; then
5182     gcc_cv_ld_eh_gc_sections=yes
5183   fi
5184 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
5185   cat > conftest.s <<EOF
5186         .section        .text
5187 .globl _start
5188         .type _start, @function
5189 _start:
5190         .long foo
5191         .size _start, .-_start
5192         .section        .text.foo,"ax",@progbits
5193         .type foo, @function
5194 foo:
5195         .long 0
5196         .size foo, .-foo
5197         .section        .gcc_except_table.foo,"a",@progbits
5198 .L0:
5199         .long 0
5200         .section        .eh_frame,"a",@progbits
5201         .long .L0
5202 EOF
5203   if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
5204     if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
5205          | grep "gc-sections option ignored" > /dev/null; then
5206       gcc_cv_ld_eh_gc_sections=no
5207     elif $gcc_cv_objdump -h conftest 2> /dev/null \
5208          | grep gcc_except_table > /dev/null; then
5209       gcc_cv_ld_eh_gc_sections=yes
5210       # If no COMDAT groups, the compiler will emit .gnu.linkonce.t. sections.
5211       if test x$gcc_cv_as_comdat_group != xyes; then
5212         gcc_cv_ld_eh_gc_sections=no
5213         cat > conftest.s <<EOF
5214         .section        .text
5215 .globl _start
5216         .type _start, @function
5217 _start:
5218         .long foo
5219         .size _start, .-_start
5220         .section        .gnu.linkonce.t.foo,"ax",@progbits
5221         .type foo, @function
5222 foo:
5223         .long 0
5224         .size foo, .-foo
5225         .section        .gcc_except_table.foo,"a",@progbits
5226 .L0:
5227         .long 0
5228         .section        .eh_frame,"a",@progbits
5229         .long .L0
5230 EOF
5231         if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
5232           if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
5233                | grep "gc-sections option ignored" > /dev/null; then
5234             gcc_cv_ld_eh_gc_sections=no
5235           elif $gcc_cv_objdump -h conftest 2> /dev/null \
5236                | grep gcc_except_table > /dev/null; then
5237             gcc_cv_ld_eh_gc_sections=yes
5238           fi
5239         fi
5240       fi
5241     fi
5242   fi
5243   rm -f conftest.s conftest.o conftest
5244 fi
5245 case "$target" in
5246   hppa*-*-linux*)
5247     # ??? This apparently exposes a binutils bug with PC-relative relocations.
5248     gcc_cv_ld_eh_gc_sections=no
5249     ;;
5250 esac
5251 if test x$gcc_cv_ld_eh_gc_sections = xyes; then
5252         AC_DEFINE(HAVE_LD_EH_GC_SECTIONS, 1,
5253   [Define if your linker supports garbage collection of
5254    sections in presence of EH frames.])
5255 fi
5256 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections)
5257
5258 AC_MSG_CHECKING(linker EH garbage collection of sections bug)
5259 gcc_cv_ld_eh_gc_sections_bug=no
5260 if test $in_tree_ld = yes ; then
5261   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -lt 19 -o "$gcc_cv_gld_major_version" -lt 2 \
5262      && test $in_tree_ld_is_elf = yes; then
5263     gcc_cv_ld_eh_gc_sections_bug=yes
5264   fi
5265 elif test x$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
5266   gcc_cv_ld_eh_gc_sections_bug=yes
5267   cat > conftest.s <<EOF
5268         .section        .text
5269 .globl _start
5270         .type _start, @function
5271 _start:
5272         .long foo
5273         .size _start, .-_start
5274         .section        .text.startup.foo,"ax",@progbits
5275         .type foo, @function
5276 foo:
5277         .long 0
5278         .size foo, .-foo
5279         .section        .gcc_except_table.foo,"a",@progbits
5280 .L0:
5281         .long 0
5282         .section        .eh_frame,"a",@progbits
5283         .long .L0
5284 EOF
5285   if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
5286     if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
5287          | grep "gc-sections option ignored" > /dev/null; then
5288       :
5289     elif $gcc_cv_objdump -h conftest 2> /dev/null \
5290          | grep gcc_except_table > /dev/null; then
5291       gcc_cv_ld_eh_gc_sections_bug=no
5292     fi
5293   fi
5294   rm -f conftest.s conftest.o conftest
5295 fi
5296 if test x$gcc_cv_ld_eh_gc_sections_bug = xyes; then
5297         AC_DEFINE(HAVE_LD_EH_GC_SECTIONS_BUG, 1,
5298   [Define if your linker has buggy garbage collection of
5299    sections support when .text.startup.foo like sections are used.])
5300 fi
5301 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections_bug)
5302
5303 AC_MSG_CHECKING(linker for compressed debug sections)
5304 # gold/gld support compressed debug sections since binutils 2.19/2.21
5305 # In binutils 2.26, gld gained support for the ELF gABI format.
5306 if test $in_tree_ld = yes ; then
5307   gcc_cv_ld_compress_debug=0
5308   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 19 -o "$gcc_cv_gld_major_version" -gt 2 \
5309      && test $in_tree_ld_is_elf = yes && test $ld_is_gold = yes; then
5310     gcc_cv_ld_compress_debug=2
5311     gcc_cv_ld_compress_debug_option="--compress-debug-sections"
5312   elif test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 26 -o "$gcc_cv_gld_major_version" -gt 2 \
5313      && test $in_tree_ld_is_elf = yes && test $ld_is_gold = no; then
5314     gcc_cv_ld_compress_debug=3
5315     gcc_cv_ld_compress_debug_option="--compress-debug-sections"
5316   elif test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2 \
5317      && test $in_tree_ld_is_elf = yes; then
5318     gcc_cv_ld_compress_debug=1
5319   fi
5320 elif echo "$ld_ver" | grep GNU > /dev/null; then
5321   if test "$ld_vers_major" -lt 2 \
5322      || test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 21; then
5323     gcc_cv_ld_compress_debug=0
5324   elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 26; then
5325     gcc_cv_ld_compress_debug=1
5326   else
5327     gcc_cv_ld_compress_debug=3
5328     gcc_cv_ld_compress_debug_option="--compress-debug-sections"
5329   fi
5330   if test $ld_is_gold = yes; then
5331     gcc_cv_ld_compress_debug=2
5332     gcc_cv_ld_compress_debug_option="--compress-debug-sections"
5333   fi
5334 else
5335 changequote(,)dnl
5336   case "${target}" in
5337     *-*-solaris2*)
5338       # Introduced in Solaris 11.2.
5339       if $gcc_cv_ld --help 2>&1 | grep -- '-z compress-sections' > /dev/null; then
5340         gcc_cv_ld_compress_debug=3
5341         gcc_cv_ld_compress_debug_option="-z compress-sections"
5342       else
5343         gcc_cv_ld_compress_debug=0
5344       fi
5345       ;;
5346     *)
5347       # Assume linkers other than GNU ld don't support compessed debug
5348       # sections.
5349       gcc_cv_ld_compress_debug=0
5350       ;;
5351   esac
5352 changequote([,])dnl
5353 fi
5354 AC_DEFINE_UNQUOTED(HAVE_LD_COMPRESS_DEBUG, $gcc_cv_ld_compress_debug,
5355 [Define to the level of your linker's compressed debug section support.])
5356 AC_DEFINE_UNQUOTED(LD_COMPRESS_DEBUG_OPTION, "$gcc_cv_ld_compress_debug_option",
5357 [Define to the linker option to enable compressed debug sections.])
5358 AC_MSG_RESULT($gcc_cv_ld_compress_debug)
5359
5360 if test x"$ld64_flag" = x"yes"; then
5361
5362   # Set defaults for possibly untestable items.
5363   gcc_cv_ld64_export_dynamic=0
5364
5365   if test "$build" = "$host"; then
5366     darwin_try_test=1
5367   else
5368     darwin_try_test=0
5369   fi
5370
5371   # On Darwin, because of FAT library support, it is often possible to execute
5372   # exes from compatible archs even when the host differs from the build system.
5373   case "$build","$host" in
5374     x86_64-*-darwin*,i?86-*-darwin* | powerpc64*-*-darwin*,powerpc*-*-darwin*)
5375         darwin_try_test=1;;
5376     *) ;;
5377   esac
5378
5379   # If the configurer specified a minimum ld64 version to be supported, then use
5380   # that to determine feature support.
5381   if test x"${gcc_cv_ld64_version}" != x; then
5382     AC_MSG_CHECKING(ld64 specified version)
5383     gcc_cv_ld64_major=`echo "$gcc_cv_ld64_version" | sed -e 's/\..*//'`
5384     AC_MSG_RESULT($gcc_cv_ld64_major)
5385    if test "$gcc_cv_ld64_major" -ge 236; then
5386       gcc_cv_ld64_export_dynamic=1
5387     fi
5388   elif test -x "$gcc_cv_ld" -a "$darwin_try_test" -eq 1; then
5389     # If the version was not specified, try to find it.
5390     AC_MSG_CHECKING(linker version)
5391     if test x"${gcc_cv_ld64_version}" = x; then
5392       gcc_cv_ld64_version=`$gcc_cv_ld -v 2>&1 | grep ld64 | sed s/.*ld64-// | awk '{print $1}'`
5393     fi
5394     AC_MSG_RESULT($gcc_cv_ld64_version)
5395
5396     AC_MSG_CHECKING(linker for -export_dynamic support)
5397     gcc_cv_ld64_export_dynamic=1
5398     if $gcc_cv_ld -export_dynamic < /dev/null 2>&1 | grep 'unknown option' > /dev/null; then
5399       gcc_cv_ld64_export_dynamic=0
5400     fi
5401     AC_MSG_RESULT($gcc_cv_ld64_export_dynamic)
5402   fi
5403
5404   if test x"${gcc_cv_ld64_version}" != x; then
5405     AC_DEFINE_UNQUOTED(LD64_VERSION, "${gcc_cv_ld64_version}",
5406       [Define to ld64 version.])
5407   fi
5408
5409   AC_DEFINE_UNQUOTED(LD64_HAS_EXPORT_DYNAMIC, $gcc_cv_ld64_export_dynamic,
5410   [Define to 1 if ld64 supports '-export_dynamic'.])
5411 fi
5412
5413 # --------
5414 # UNSORTED
5415 # --------
5416
5417 AC_CACHE_CHECK(linker --as-needed support,
5418 gcc_cv_ld_as_needed,
5419 [gcc_cv_ld_as_needed=no
5420 gcc_cv_ld_as_needed_option='--as-needed'
5421 gcc_cv_ld_no_as_needed_option='--no-as-needed'
5422 if test $in_tree_ld = yes ; then
5423   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
5424      && test $in_tree_ld_is_elf = yes; then
5425     gcc_cv_ld_as_needed=yes
5426     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 28; then
5427       gcc_cv_ld_as_needed_option='--push-state --as-needed'
5428       gcc_cv_ld_no_as_needed_option='--pop-state'
5429     fi
5430   fi
5431 elif test x$gcc_cv_ld != x; then
5432   # Check if linker supports --as-needed and --no-as-needed options
5433   if $gcc_cv_ld --help 2>&1 | grep as-needed > /dev/null; then
5434     gcc_cv_ld_as_needed=yes
5435     if $gcc_cv_ld --help 2>&1 | grep push-state > /dev/null \
5436        && $gcc_cv_ld --help 2>&1 | grep pop-state > /dev/null \
5437        && echo "$ld_ver" | grep GNU > /dev/null \
5438        && test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -ge 28; then
5439       # Use these options only when both ld.bfd and ld.gold support
5440       # --push-state/--pop-state, which unfortunately wasn't added
5441       # at the same time.
5442       gcc_cv_ld_as_needed_option='--push-state --as-needed'
5443       gcc_cv_ld_no_as_needed_option='--pop-state'
5444     fi
5445   fi
5446   case "$target:$gnu_ld" in
5447     *-*-solaris2*:no)
5448       # Solaris 2 ld always supports -z ignore/-z record.  Prefer the native
5449       # forms.
5450       gcc_cv_ld_as_needed=yes
5451       gcc_cv_ld_as_needed_option="-z ignore"
5452       gcc_cv_ld_no_as_needed_option="-z record"
5453       ;;
5454   esac
5455 fi
5456 # --as-needed/-z ignore can only be used if libgcc_s.so.1 uses
5457 # dl_iterate_phdr, i.e. since Solaris 11.
5458 case "$target" in
5459   *-*-solaris2.1[[1-9]]*)
5460     case "$target" in
5461     i?86-*-* | x86_64-*-*)
5462       if echo "$ld_ver" | grep GNU > /dev/null; then
5463         # Doesn't work with gld on Solaris/x86 due to PR ld/12320.
5464         gcc_cv_ld_as_needed=no
5465       fi
5466       ;;
5467     esac
5468     ;;
5469   *-*-solaris2*)
5470     gcc_cv_ld_as_needed=no
5471     ;;
5472 esac
5473 ])
5474 if test x"$gcc_cv_ld_as_needed" = xyes; then
5475         AC_DEFINE(HAVE_LD_AS_NEEDED, 1,
5476 [Define if your linker supports --as-needed/--no-as-needed or equivalent options.])
5477         AC_DEFINE_UNQUOTED(LD_AS_NEEDED_OPTION, "$gcc_cv_ld_as_needed_option",
5478 [Define to the linker option to ignore unused dependencies.])
5479         AC_DEFINE_UNQUOTED(LD_NO_AS_NEEDED_OPTION, "$gcc_cv_ld_no_as_needed_option",
5480 [Define to the linker option to keep unused dependencies.])
5481 fi
5482
5483 AC_MSG_CHECKING(linker mapfile support for clearing hardware capabilities)
5484 saved_LDFLAGS="$LDFLAGS"
5485 for clearcap_map in sol2-clearcapv2.map sol2-clearcap.map; do
5486   LDFLAGS="$saved_LDFLAGS -Wl,-M,${srcdir}/config/$clearcap_map"
5487   AC_LINK_IFELSE([int main(void) {return 0;}],
5488     [gcc_cv_ld_clearcap=yes; break], [gcc_cv_ld_clearcap=no])
5489 done
5490 LDFLAGS="$saved_LDFLAGS"
5491 if test "x$gcc_cv_ld_clearcap" = xyes; then
5492   AC_DEFINE([HAVE_LD_CLEARCAP], 1,
5493 [Define if the linker supports clearing hardware capabilities via mapfile.])
5494   AC_CONFIG_LINKS([clearcap.map:${srcdir}/config/$clearcap_map])
5495 fi
5496 AC_MSG_RESULT($gcc_cv_ld_clearcap)
5497
5498 case "$target" in
5499   powerpc*-*-*)
5500     case "$target" in
5501       *le-*-linux*)
5502         emul_name="-melf32lppc"
5503         ;;
5504       *)
5505         emul_name="-melf32ppc"
5506         ;;
5507     esac
5508     AC_CACHE_CHECK(linker .gnu.attributes long double support,
5509     gcc_cv_ld_ppc_attr,
5510     [gcc_cv_ld_ppc_attr=no
5511     if test x"$ld_is_gold" = xyes; then
5512       gcc_cv_ld_ppc_attr=yes
5513     elif test $in_tree_ld = yes ; then
5514       if test "$gcc_cv_gld_major_version" -eq 2 \
5515                 -a "$gcc_cv_gld_minor_version" -ge 28 \
5516                 -o "$gcc_cv_gld_major_version" -gt 2; then
5517         gcc_cv_ld_ppc_attr=yes
5518       fi
5519     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
5520       # check that merging the long double .gnu_attribute doesn't warn
5521       cat > conftest1.s <<EOF
5522         .gnu_attribute 4,1
5523 EOF
5524       cat > conftest2.s <<EOF
5525         .gnu_attribute 4,9
5526 EOF
5527       if $gcc_cv_as -a32 -o conftest1.o conftest1.s > /dev/null 2>&1 \
5528          && $gcc_cv_as -a32 -o conftest2.o conftest2.s > /dev/null 2>&1 \
5529          && $gcc_cv_ld $emul_name -r -o conftest.o conftest1.o conftest2.o > /dev/null 2> conftest.err \
5530          && test ! -s conftest.err; then
5531         gcc_cv_ld_ppc_attr=yes
5532       fi
5533       rm -f conftest.err conftest.o conftest1.o conftest2.o conftest1.s conftest2.s
5534     fi
5535     ])
5536     if test x$gcc_cv_ld_ppc_attr = xyes; then
5537       AC_DEFINE(HAVE_LD_PPC_GNU_ATTR_LONG_DOUBLE, 1,
5538     [Define if your PowerPC linker has .gnu.attributes long double support.])
5539     fi
5540     ;;
5541 esac
5542
5543 case "$target:$tm_file" in
5544   powerpc64-*-freebsd* | powerpc64*-*-linux* | powerpc*-*-linux*rs6000/biarch64.h*)
5545   case "$target" in
5546      *le-*-linux*)
5547      emul_name="-melf64lppc"
5548       ;;
5549      *-*-linux*)
5550      emul_name="-melf64ppc"
5551       ;;
5552      *-*-freebsd*)
5553      emul_name="-melf64ppc_fbsd"
5554       ;;
5555   esac
5556     AC_CACHE_CHECK(linker support for omitting dot symbols,
5557     gcc_cv_ld_no_dot_syms,
5558     [gcc_cv_ld_no_dot_syms=no
5559     if test x"$ld_is_gold" = xyes; then
5560       gcc_cv_ld_no_dot_syms=yes
5561     elif test $in_tree_ld = yes ; then
5562       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2; then
5563         gcc_cv_ld_no_dot_syms=yes
5564       fi
5565     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
5566       cat > conftest1.s <<EOF
5567         .text
5568         bl .foo
5569 EOF
5570       cat > conftest2.s <<EOF
5571         .section ".opd","aw"
5572         .align 3
5573         .globl foo
5574         .type foo,@function
5575 foo:
5576         .quad .LEfoo,.TOC.@tocbase,0
5577         .text
5578 .LEfoo:
5579         blr
5580         .size foo,.-.LEfoo
5581 EOF
5582       if $gcc_cv_as -a64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
5583          && $gcc_cv_as -a64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
5584          && $gcc_cv_ld $emul_name -o conftest conftest1.o conftest2.o > /dev/null 2>&1; then
5585         gcc_cv_ld_no_dot_syms=yes
5586       fi
5587       rm -f conftest conftest1.o conftest2.o conftest1.s conftest2.s
5588     fi
5589     ])
5590     if test x"$gcc_cv_ld_no_dot_syms" = xyes; then
5591       AC_DEFINE(HAVE_LD_NO_DOT_SYMS, 1,
5592     [Define if your PowerPC64 linker only needs function descriptor syms.])
5593     fi
5594
5595     AC_CACHE_CHECK(linker large toc support,
5596     gcc_cv_ld_large_toc,
5597     [gcc_cv_ld_large_toc=no
5598     if test x"$ld_is_gold" = xyes; then
5599       gcc_cv_ld_large_toc=yes
5600     elif test $in_tree_ld = yes ; then
5601       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2; then
5602         gcc_cv_ld_large_toc=yes
5603       fi
5604     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
5605       cat > conftest.s <<EOF
5606         .section ".tbss","awT",@nobits
5607         .align 3
5608 ie0:    .space 8
5609         .global _start
5610         .text
5611 _start:
5612         addis 9,13,ie0@got@tprel@ha
5613         ld 9,ie0@got@tprel@l(9)
5614 EOF
5615       if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1 \
5616          && $gcc_cv_ld $emul_name --no-toc-sort -o conftest conftest.o > /dev/null 2>&1; then
5617         gcc_cv_ld_large_toc=yes
5618       fi
5619       rm -f conftest conftest.o conftest.s
5620     fi
5621     ])
5622     if test x"$gcc_cv_ld_large_toc" = xyes; then
5623       AC_DEFINE(HAVE_LD_LARGE_TOC, 1,
5624     [Define if your PowerPC64 linker supports a large TOC.])
5625     fi
5626
5627     AC_CACHE_CHECK(linker toc pointer alignment,
5628     gcc_cv_ld_toc_align,
5629     [if test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_nm != x; then
5630       cat > conftest.s <<EOF
5631         .global _start
5632         .text
5633 _start:
5634         addis 9,2,x@got@ha
5635         .section .data.rel.ro,"aw",@progbits
5636         .p2align 16
5637         .space 32768
5638 x:      .quad .TOC.
5639 EOF
5640       if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1 \
5641          && $gcc_cv_ld $emul_name -z norelro -o conftest conftest.o > /dev/null 2>&1; then
5642         gcc_cv_ld_toc_align=`$gcc_cv_nm conftest | ${AWK} '/\.TOC\./ { match ($0, "0[[[:xdigit:]]]*", a); print strtonum ("0x" substr(a[[0]], length(a[[0]])-3)) }'`
5643       fi
5644       rm -f conftest conftest.o conftest.s
5645     fi
5646     ])
5647     if test -n "$gcc_cv_ld_toc_align" && test $gcc_cv_ld_toc_align -gt 8; then
5648       AC_DEFINE_UNQUOTED(POWERPC64_TOC_POINTER_ALIGNMENT, $gcc_cv_ld_toc_align,
5649     [Define to .TOC. alignment forced by your linker.])
5650     fi
5651     ;;
5652 esac
5653
5654 case "$target" in
5655   *-*-aix*)
5656     AC_CACHE_CHECK(linker large toc support,
5657     gcc_cv_ld_large_toc,
5658     [gcc_cv_ld_large_toc=no
5659     if test x$gcc_cv_as != x ; then
5660       cat > conftest.s <<EOF
5661         .toc
5662 LC..1:
5663         .tc a[[TC]],a[[RW]]
5664         .extern a[[RW]]
5665         .csect .text[[PR]]
5666 .largetoctest:
5667         addis 9,LC..1@u(2)
5668         ld 3,LC..1@l(9)
5669 EOF
5670       if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1; then
5671         gcc_cv_ld_large_toc=yes
5672       fi
5673       rm -f conftest conftest.o conftest.s
5674     fi
5675     ])
5676     if test x"$gcc_cv_ld_large_toc" = xyes; then
5677       AC_DEFINE(HAVE_LD_LARGE_TOC, 1,
5678     [Define if your PowerPC64 linker supports a large TOC.])
5679     fi
5680     ;;
5681 esac
5682
5683 AC_CACHE_CHECK(linker --build-id support,
5684   gcc_cv_ld_buildid,
5685   [gcc_cv_ld_buildid=no
5686   if test $in_tree_ld = yes ; then
5687     if test "$gcc_cv_gld_major_version" -eq 2 -a \
5688        "$gcc_cv_gld_minor_version" -ge 18 -o \
5689        "$gcc_cv_gld_major_version" -gt 2 \
5690        && test $in_tree_ld_is_elf = yes; then
5691       gcc_cv_ld_buildid=yes
5692     fi
5693   elif test x$gcc_cv_ld != x; then
5694     if $gcc_cv_ld --help 2>&1 | grep build-id > /dev/null; then
5695       gcc_cv_ld_buildid=yes
5696     fi
5697   fi])
5698 if test x"$gcc_cv_ld_buildid" = xyes; then
5699   AC_DEFINE(HAVE_LD_BUILDID, 1,
5700   [Define if your linker supports --build-id.])
5701 fi
5702
5703 AC_ARG_ENABLE(linker-build-id,
5704 [AS_HELP_STRING([--enable-linker-build-id],
5705                 [compiler will always pass --build-id to linker])],
5706 [],
5707 enable_linker_build_id=no)
5708
5709 if test x"$enable_linker_build_id" = xyes; then
5710   if test x"$gcc_cv_ld_buildid" = xyes; then
5711     AC_DEFINE(ENABLE_LD_BUILDID, 1,
5712     [Define if gcc should always pass --build-id to linker.])
5713   else
5714     AC_MSG_WARN(--build-id is not supported by your linker; --enable-linker-build-id ignored)
5715   fi
5716 fi
5717
5718 # In binutils 2.21, GNU ld gained support for new emulations fully
5719 # supporting the Solaris 2 ABI.  Detect their presence in the linker used.
5720 AC_CACHE_CHECK(linker *_sol2 emulation support,
5721   gcc_cv_ld_sol2_emulation,
5722   [gcc_cv_ld_sol2_emulation=no
5723   if test $in_tree_ld = yes ; then
5724     if test "$gcc_cv_gld_major_version" -eq 2 -a \
5725        "$gcc_cv_gld_minor_version" -ge 21 -o \
5726        "$gcc_cv_gld_major_version" -gt 2 \
5727        && test $in_tree_ld_is_elf = yes; then
5728       gcc_cv_ld_sol2_emulation=yes
5729     fi
5730   elif test x$gcc_cv_ld != x; then
5731     if $gcc_cv_ld -V 2>/dev/null | sed -e '1,/Supported emulations/d;q' | \
5732        grep _sol2 > /dev/null; then
5733       gcc_cv_ld_sol2_emulation=yes
5734     fi
5735   fi])
5736 if test x"$gcc_cv_ld_sol2_emulation" = xyes; then
5737   AC_DEFINE(HAVE_LD_SOL2_EMULATION, 1,
5738   [Define if your linker supports the *_sol2 emulations.])
5739 fi
5740
5741 AC_CACHE_CHECK(linker --sysroot support,
5742   gcc_cv_ld_sysroot,
5743   [gcc_cv_ld_sysroot=no
5744   if test $in_tree_ld = yes ; then
5745       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 ; then
5746         gcc_cv_ld_sysroot=yes
5747       fi
5748   elif test x$gcc_cv_ld != x; then
5749     if $gcc_cv_ld --help 2>&1 | grep sysroot > /dev/null; then
5750       gcc_cv_ld_sysroot=yes
5751     fi
5752   fi])
5753 if test x"$gcc_cv_ld_sysroot" = xyes; then
5754   AC_DEFINE(HAVE_LD_SYSROOT, 1,
5755   [Define if your linker supports --sysroot.])
5756 fi
5757
5758 case $target in
5759 *-*-solaris2*)
5760   # Check for system-provided CRTs on Solaris 11.x and Solaris 12.
5761   AC_CACHE_CHECK([system-provided CRTs on Solaris],
5762     gcc_cv_solaris_crts,
5763     [gcc_cv_solaris_crts=no
5764      if test x$host != x$target; then
5765        if test "x$with_sysroot" = xyes; then
5766          target_sysroot="${test_exec_prefix}/${target_noncanonical}/sys-root"
5767        else
5768          target_sysroot="${with_sysroot}"
5769        fi
5770      fi
5771      target_libdir="$target_sysroot/usr/lib"
5772      # At the time they were added, gcrt1.o became a symlink for backwards
5773      # compatibility on x86, while crt1.o was added on sparc, so check for that.
5774      case $target in
5775        i?86-*-solaris2* | x86_64-*-solaris2*)
5776          if test -h "$target_libdir/gcrt1.o"; then gcc_cv_solaris_crts=yes; fi
5777          ;;
5778        sparc*-*-solaris2*)
5779          if test -f "$target_libdir/crt1.o"; then gcc_cv_solaris_crts=yes; fi
5780          ;;
5781      esac])
5782   ;;
5783 esac
5784 if test x$gcc_cv_solaris_crts = xyes; then
5785   AC_DEFINE(HAVE_SOLARIS_CRTS, 1,
5786             [Define if the system-provided CRTs are present on Solaris.])
5787 fi
5788
5789 AC_ARG_ENABLE(libssp,
5790 [AS_HELP_STRING([--enable-libssp], [enable linking against libssp])],
5791 [case "${enableval}" in
5792   yes|no)
5793     ;;
5794   *)
5795     AC_MSG_ERROR([unknown libssp setting $enableval])
5796     ;;
5797 esac], [])
5798
5799 # Test for stack protector support in target C library.
5800 AC_CACHE_CHECK(__stack_chk_fail in target C library,
5801   gcc_cv_libc_provides_ssp,
5802   [gcc_cv_libc_provides_ssp=no
5803   if test "x$enable_libssp" = "xno"; then
5804     gcc_cv_libc_provides_ssp=yes
5805   elif test "x$enable_libssp" = "xyes"; then
5806     gcc_cv_libc_provides_ssp=no
5807   else
5808     case "$target" in
5809        *-*-musl*)
5810          # All versions of musl provide stack protector
5811          gcc_cv_libc_provides_ssp=yes;;
5812        *-*-linux* | *-*-kfreebsd*-gnu)
5813       # glibc 2.4 and later provides __stack_chk_fail and
5814       # either __stack_chk_guard, or TLS access to stack guard canary.
5815       GCC_GLIBC_VERSION_GTE_IFELSE([2], [4], [gcc_cv_libc_provides_ssp=yes], [
5816       [if test -f $target_header_dir/features.h \
5817          && $EGREP '^[  ]*#[    ]*define[       ]+__GNU_LIBRARY__[      ]+([1-9][0-9]|[6-9])' \
5818             $target_header_dir/features.h > /dev/null; then
5819         if $EGREP '^[   ]*#[    ]*define[       ]+__UCLIBC__[   ]+1' \
5820              $target_header_dir/features.h > /dev/null && \
5821              test -f $target_header_dir/bits/uClibc_config.h && \
5822              $EGREP '^[         ]*#[    ]*define[       ]+__UCLIBC_HAS_SSP__[   ]+1' \
5823              $target_header_dir/bits/uClibc_config.h > /dev/null; then
5824           gcc_cv_libc_provides_ssp=yes
5825         fi
5826       # all versions of Bionic support stack protector
5827       elif test -f $target_header_dir/sys/cdefs.h \
5828         && $EGREP '^[  ]*#[    ]*define[       ]+__BIONIC__[   ]+1' \
5829            $target_header_dir/sys/cdefs.h > /dev/null; then
5830          gcc_cv_libc_provides_ssp=yes
5831       fi]])
5832         ;;
5833        *-*-gnu*)
5834          # Avoid complicated tests (see
5835          # <http://gcc.gnu.org/ml/gcc/2008-10/msg00130.html>) and for now
5836          # simply assert that glibc does provide this, which is true for all
5837          # realistically usable GNU/Hurd configurations.
5838          # All supported versions of musl provide it as well
5839          gcc_cv_libc_provides_ssp=yes;;
5840        *-*-darwin* | *-*-freebsd* | *-*-netbsd*)
5841          AC_CHECK_FUNC(__stack_chk_fail,[gcc_cv_libc_provides_ssp=yes],
5842            [echo "no __stack_chk_fail on this target"])
5843         ;;
5844        *) gcc_cv_libc_provides_ssp=no ;;
5845     esac
5846   fi])
5847
5848 if test x$gcc_cv_libc_provides_ssp = xyes; then
5849   AC_DEFINE(TARGET_LIBC_PROVIDES_SSP, 1,
5850             [Define if your target C library provides stack protector support])
5851 fi
5852
5853 # Check whether --enable-default-ssp was given.
5854 AC_ARG_ENABLE(default-ssp,
5855 [AS_HELP_STRING([--enable-default-ssp],
5856   [enable Stack Smashing Protection as default])],[
5857 if test x$gcc_cv_libc_provides_ssp = xyes; then
5858   case "$target" in
5859     ia64*-*-*) enable_default_ssp=no ;;
5860     *) enable_default_ssp=$enableval ;;
5861   esac
5862 else
5863   enable_default_ssp=no
5864 fi],
5865 enable_default_ssp=no)
5866 if test x$enable_default_ssp = xyes ; then
5867   AC_DEFINE(ENABLE_DEFAULT_SSP, 1,
5868       [Define if your target supports default stack protector and it is enabled.])
5869 fi
5870 AC_SUBST([enable_default_ssp])
5871
5872 # Test for <sys/sdt.h> on the target.
5873 GCC_TARGET_TEMPLATE([HAVE_SYS_SDT_H])
5874 AC_MSG_CHECKING(sys/sdt.h in the target C library)
5875 have_sys_sdt_h=no
5876 if test -f $target_header_dir/sys/sdt.h; then
5877   have_sys_sdt_h=yes
5878   AC_DEFINE(HAVE_SYS_SDT_H, 1,
5879             [Define if your target C library provides sys/sdt.h])
5880 fi
5881 AC_MSG_RESULT($have_sys_sdt_h)
5882
5883 # Check if TFmode long double should be used by default or not.
5884 # Some glibc targets used DFmode long double, but with glibc 2.4
5885 # and later they can use TFmode.
5886 case "$target" in
5887   powerpc*-*-linux* | \
5888   sparc*-*-linux* | \
5889   s390*-*-linux* | \
5890   alpha*-*-linux*)
5891     AC_ARG_WITH(long-double-128,
5892       [AS_HELP_STRING([--with-long-double-128],
5893                       [use 128-bit long double by default])],
5894       gcc_cv_target_ldbl128="$with_long_double_128",
5895       [GCC_GLIBC_VERSION_GTE_IFELSE([2], [4], [gcc_cv_target_ldbl128=yes], [
5896       [gcc_cv_target_ldbl128=no
5897       grep '^[  ]*#[    ]*define[       ][      ]*__LONG_DOUBLE_MATH_OPTIONAL' \
5898         $target_header_dir/bits/wordsize.h > /dev/null 2>&1 \
5899       && gcc_cv_target_ldbl128=yes
5900       ]])])
5901     ;;
5902 esac
5903 if test x$gcc_cv_target_ldbl128 = xyes; then
5904   AC_DEFINE(TARGET_DEFAULT_LONG_DOUBLE_128, 1,
5905             [Define if TFmode long double should be the default])
5906 fi
5907
5908 # Check if TFmode long double target should use the IBM extended double or IEEE
5909 # 128-bit floating point formats if long doubles are 128-bits long.  The long
5910 # double type can only be switched on powerpc64 bit Linux systems where VSX is
5911 # supported.  Other PowerPC systems do not build the IEEE 128-bit emulator in
5912 # libgcc.
5913 AC_ARG_WITH([long-double-format],
5914   [AS_HELP_STRING([--with-long-double-format={ieee,ibm}]
5915                   [Specify whether PowerPC long double uses IEEE or IBM format])],[
5916 case "$target:$with_long_double_format" in
5917   powerpc64le-*-linux*:ieee | powerpc64le-*-linux*:ibm)
5918     :
5919     ;;
5920   powerpc64-*-linux*:ieee | powerpc64-*-linux*:ibm)
5921     # IEEE 128-bit emulation is only built on 64-bit VSX Linux systems
5922     case "$with_cpu" in
5923       power7 | power8 | power9 | power1*)
5924         :
5925         ;;
5926       *)
5927         AC_MSG_ERROR([Configuration option --with-long-double-format is only \
5928 supported if the default cpu is power7 or newer])
5929         with_long_double_format=""
5930         ;;
5931       esac
5932       ;;
5933   xpowerpc64*-*-linux*:*)
5934     AC_MSG_ERROR([--with-long-double-format argument should be ibm or ieee])
5935     with_long_double_format=""
5936     ;;
5937   *)
5938     AC_MSG_ERROR([Configure option --with-long-double-format is only supported \
5939 on 64-bit PowerPC VSX Linux systems])
5940     with_long_double_format=""
5941     ;;
5942 esac],
5943   [])
5944
5945 # Check if the target LIBC supports exporting the AT_PLATFORM and AT_HWCAP
5946 # values in the TCB.  Currently, only GLIBC 2.23 and later support this.
5947 gcc_cv_libc_provides_hwcap_in_tcb=no
5948 case "$target" in
5949   powerpc*-*-linux*)
5950     GCC_GLIBC_VERSION_GTE_IFELSE([2], [23], [gcc_cv_libc_provides_hwcap_in_tcb=yes], )
5951     ;;
5952 esac
5953 if test x$gcc_cv_libc_provides_hwcap_in_tcb = xyes; then
5954   AC_DEFINE(TARGET_LIBC_PROVIDES_HWCAP_IN_TCB, 1,
5955             [Define if your target C Library provides the AT_HWCAP value in the TCB])
5956 fi
5957
5958 AC_MSG_CHECKING(dl_iterate_phdr in target C library)
5959 gcc_cv_target_dl_iterate_phdr=unknown
5960 case "$target" in
5961   # Restrict to Solaris 11+.  While most of the Solaris 11 linker changes
5962   # were backported to Solaris 10 Update 10, dl_iterate_phdr only lives in
5963   # libdl there, both complicating its use and breaking compatibility
5964   # between Solaris 10 updates.
5965   *-*-solaris2.1[[1-9]]*)
5966     # <link.h> needs both a dl_iterate_phdr declaration and support for
5967     # compilation with largefile support.
5968     if grep dl_iterate_phdr $target_header_dir/link.h > /dev/null 2>&1 \
5969       && grep 'large file capable' $target_header_dir/link.h > /dev/null 2>&1; then
5970       gcc_cv_target_dl_iterate_phdr=yes
5971     else
5972       gcc_cv_target_dl_iterate_phdr=no
5973     fi
5974     ;;
5975   *-*-dragonfly* | *-*-freebsd*)
5976     if grep dl_iterate_phdr $target_header_dir/sys/link_elf.h > /dev/null 2>&1; then
5977       gcc_cv_target_dl_iterate_phdr=yes
5978     else
5979       gcc_cv_target_dl_iterate_phdr=no
5980     fi
5981     ;;
5982   *-linux-musl*)
5983     gcc_cv_target_dl_iterate_phdr=yes
5984     ;;
5985 esac
5986 GCC_TARGET_TEMPLATE([TARGET_DL_ITERATE_PHDR])
5987 if test x$gcc_cv_target_dl_iterate_phdr = xyes; then
5988    AC_DEFINE(TARGET_DL_ITERATE_PHDR, 1,
5989 [Define if your target C library provides the `dl_iterate_phdr' function.])
5990 fi
5991 AC_MSG_RESULT($gcc_cv_target_dl_iterate_phdr)
5992
5993 # We no longer support different GC mechanisms.  Emit an error if
5994 # the user configures with --with-gc.
5995 AC_ARG_WITH(gc,
5996 [AS_HELP_STRING([--with-gc={page,zone}],
5997                 [this option is not supported anymore.  It used to choose
5998                  the garbage collection mechanism to use with the compiler])],
5999 [AC_MSG_ERROR([Configure option --with-gc is only supported up to GCC 4.7.x])],
6000 [])
6001
6002 # Libraries to use on the host.  This will normally be set by the top
6003 # level Makefile.  Here we simply capture the value for our Makefile.
6004 if test -z "${HOST_LIBS+set}"; then
6005   HOST_LIBS=
6006 fi
6007 AC_SUBST(HOST_LIBS)
6008
6009 # Use the system's zlib library.
6010 AM_ZLIB
6011
6012 dnl Very limited version of automake's enable-maintainer-mode
6013
6014 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
6015   dnl maintainer-mode is disabled by default
6016   AC_ARG_ENABLE(maintainer-mode,
6017 [AS_HELP_STRING([--enable-maintainer-mode],
6018                 [enable make rules and dependencies not useful
6019                  (and sometimes confusing) to the casual installer])],
6020       maintainer_mode=$enableval,
6021       maintainer_mode=no)
6022
6023 AC_MSG_RESULT($maintainer_mode)
6024
6025 if test "$maintainer_mode" = "yes"; then
6026   MAINT=''
6027 else
6028   MAINT='#'
6029 fi
6030 AC_SUBST(MAINT)dnl
6031
6032 dnl Whether to prevent multiple front-ends from linking at the same time
6033
6034 AC_MSG_CHECKING([whether to avoid linking multiple front-ends at once])
6035   AC_ARG_ENABLE(link-mutex,
6036 [AS_HELP_STRING([--enable-link-mutex],
6037                 [avoid linking multiple front-ends at once to avoid thrashing
6038                  on the build machine])],
6039       do_link_mutex=$enableval,
6040       do_link_mutex=no)
6041 AC_MSG_RESULT($do_link_mutex)
6042
6043 if test "$do_link_mutex" = "yes"; then
6044    DO_LINK_MUTEX=true
6045 else
6046    DO_LINK_MUTEX=false
6047 fi
6048 AC_SUBST(DO_LINK_MUTEX)
6049
6050 # --------------
6051 # Language hooks
6052 # --------------
6053
6054 # Make empty files to contain the specs and options for each language.
6055 # Then add #include lines to for a compiler that has specs and/or options.
6056
6057 subdirs=
6058 lang_opt_files=
6059 lang_specs_files=
6060 lang_tree_files=
6061 # These (without "all_") are set in each config-lang.in.
6062 # `language' must be a single word so is spelled singularly.
6063 all_languages=
6064 all_compilers=
6065 all_outputs='Makefile'
6066 # List of language makefile fragments.
6067 all_lang_makefrags=
6068 # Additional files for gengtype
6069 all_gtfiles="$target_gtfiles"
6070
6071 # These are the languages that are set in --enable-languages,
6072 # and are available in the GCC tree.
6073 all_selected_languages=
6074
6075 # Add the language fragments.
6076 # Languages are added via two mechanisms.  Some information must be
6077 # recorded in makefile variables, these are defined in config-lang.in.
6078 # We accumulate them and plug them into the main Makefile.
6079 # The other mechanism is a set of hooks for each of the main targets
6080 # like `clean', `install', etc.
6081
6082 language_hooks="Make-hooks"
6083
6084 for lang in ${srcdir}/*/config-lang.in
6085 do
6086 changequote(,)dnl
6087         test "$lang" = "${srcdir}/*/config-lang.in" && continue
6088
6089         lang_alias=`sed -n -e 's,^language=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^language=\([^   ]*\).*$,\1,p' $lang`
6090         if test "x$lang_alias" = x
6091         then
6092               echo "$lang doesn't set \$language." 1>&2
6093               exit 1
6094         fi
6095         subdir="`echo $lang | sed -e 's,^.*/\([^/]*\)/config-lang.in$,\1,'`"
6096         subdirs="$subdirs $subdir"
6097
6098         # $gcc_subdir is where the gcc integration files are to be found
6099         # for a language, both for internal compiler purposes (compiler
6100         # sources implementing front-end to GCC tree converters), and for
6101         # build infrastructure purposes (Make-lang.in, etc.)
6102         #
6103         # This will be <subdir> (relative to $srcdir) if a line like
6104         # gcc_subdir="<subdir>" or gcc_subdir=<subdir>
6105         # is found in <langdir>/config-lang.in, and will remain <langdir>
6106         # otherwise.
6107         #
6108         # Except for the language alias (fetched above), the regular
6109         # "config-lang.in" contents are always retrieved from $gcc_subdir,
6110         # so a <langdir>/config-lang.in setting gcc_subdir typically sets
6111         # only this and the language alias.
6112
6113         gcc_subdir=`sed -n -e 's,^gcc_subdir=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^gcc_subdir=\([^   ]*\).*$,\1,p' $lang`
6114         if [ "$gcc_subdir" = "" ]; then
6115            gcc_subdir="$subdir"
6116         fi
6117
6118         case ",$enable_languages," in
6119         *,$lang_alias,*)
6120             all_selected_languages="$all_selected_languages $lang_alias"
6121             if test -f $srcdir/$gcc_subdir/lang-specs.h; then
6122                 lang_specs_files="$lang_specs_files $srcdir/$gcc_subdir/lang-specs.h"
6123             fi
6124             ;;
6125         esac
6126 changequote([,])dnl
6127
6128         language=
6129         boot_language=
6130         compilers=
6131         outputs=
6132         gtfiles=
6133         subdir_requires=
6134         . ${srcdir}/$gcc_subdir/config-lang.in
6135         if test "x$language" = x
6136         then
6137                 echo "${srcdir}/$gcc_subdir/config-lang.in doesn't set \$language." 1>&2
6138                 exit 1
6139         fi
6140
6141         ok=:
6142         case ",$enable_languages," in
6143                 *,$lang_alias,*) ;;
6144                 *)
6145                         for i in $subdir_requires; do
6146                                 test -f "${srcdir}/$i/config-lang.in" && continue
6147                                 ok=false
6148                                 break
6149                         done
6150                 ;;
6151         esac
6152         $ok || continue
6153
6154         all_lang_makefrags="$all_lang_makefrags \$(srcdir)/$gcc_subdir/Make-lang.in"
6155         if test -f $srcdir/$gcc_subdir/lang.opt; then
6156             lang_opt_files="$lang_opt_files $srcdir/$gcc_subdir/lang.opt"
6157             all_opt_files="$all_opt_files $srcdir/$gcc_subdir/lang.opt"
6158         fi
6159         if test -f $srcdir/$gcc_subdir/$subdir-tree.def; then
6160             lang_tree_files="$lang_tree_files $srcdir/$gcc_subdir/$subdir-tree.def"
6161         fi
6162         all_languages="$all_languages $language"
6163         all_compilers="$all_compilers $compilers"
6164         all_outputs="$all_outputs $outputs"
6165         all_gtfiles="$all_gtfiles [[$subdir]] $gtfiles"
6166         case ",$enable_languages," in
6167                 *,lto,*)
6168                     AC_DEFINE(ENABLE_LTO, 1, [Define to enable LTO support.])
6169                     enable_lto=yes
6170                     AC_SUBST(enable_lto)
6171                     ;;
6172                 *) ;;
6173         esac
6174 done
6175
6176 check_languages=
6177 for language in $all_selected_languages
6178 do
6179         check_languages="$check_languages check-$language"
6180 done
6181
6182 # We link each language in with a set of hooks, reached indirectly via
6183 # lang.${target}.  Only do so for selected languages.
6184
6185 rm -f Make-hooks
6186 touch Make-hooks
6187 target_list="all.cross start.encap rest.encap tags \
6188         install-common install-man install-info install-pdf install-html dvi \
6189         pdf html uninstall info man srcextra srcman srcinfo \
6190         mostlyclean clean distclean maintainer-clean install-plugin"
6191
6192 for t in $target_list
6193 do
6194         x=
6195         for lang in $all_selected_languages
6196         do
6197                 x="$x $lang.$t"
6198         done
6199         echo "lang.$t: $x" >> Make-hooks
6200 done
6201
6202 # --------
6203 # Option include files
6204 # --------
6205
6206 ${AWK} -f $srcdir/opt-include.awk $all_opt_files > option-includes.mk
6207 option_includes="option-includes.mk"
6208 AC_SUBST_FILE(option_includes)
6209
6210 # --------
6211 # UNSORTED
6212 # --------
6213
6214 # Create .gdbinit.
6215
6216 echo "dir ." > .gdbinit
6217 echo "dir ${srcdir}" >> .gdbinit
6218 if test x$gdb_needs_out_file_path = xyes
6219 then
6220         echo "dir ${srcdir}/config/"`dirname ${out_file}` >> .gdbinit
6221 fi
6222 if test "x$subdirs" != x; then
6223         for s in $subdirs
6224         do
6225                 echo "dir ${srcdir}/$s" >> .gdbinit
6226         done
6227 fi
6228 echo "source ${srcdir}/gdbinit.in" >> .gdbinit
6229 echo "python import sys; sys.path.append('${srcdir}'); import gdbhooks" >> .gdbinit
6230
6231 # Put a breakpoint on __asan_report_error to help with debugging buffer
6232 # overflow.
6233 case "$CFLAGS" in
6234 *-fsanitize=address*)
6235   echo "source ${srcdir}/gdbasan.in" >> .gdbinit
6236   ;;
6237 esac
6238
6239 gcc_tooldir='$(libsubdir)/$(libsubdir_to_prefix)$(target_noncanonical)'
6240 AC_SUBST(gcc_tooldir)
6241 AC_SUBST(dollar)
6242
6243 # Find a directory in which to install a shared libgcc.
6244
6245 AC_ARG_ENABLE(version-specific-runtime-libs,
6246 [AS_HELP_STRING([--enable-version-specific-runtime-libs],
6247                 [specify that runtime libraries should be
6248                  installed in a compiler-specific directory])])
6249
6250 # Substitute configuration variables
6251 AC_SUBST(subdirs)
6252 AC_SUBST(srcdir)
6253 AC_SUBST(all_compilers)
6254 AC_SUBST(all_gtfiles)
6255 AC_SUBST(all_lang_makefrags)
6256 AC_SUBST(all_languages)
6257 AC_SUBST(all_selected_languages)
6258 AC_SUBST(build_exeext)
6259 AC_SUBST(build_install_headers_dir)
6260 AC_SUBST(build_xm_file_list)
6261 AC_SUBST(build_xm_include_list)
6262 AC_SUBST(build_xm_defines)
6263 AC_SUBST(build_file_translate)
6264 AC_SUBST(check_languages)
6265 AC_SUBST(cpp_install_dir)
6266 AC_SUBST(xmake_file)
6267 AC_SUBST(tmake_file)
6268 AC_SUBST(TM_ENDIAN_CONFIG)
6269 AC_SUBST(TM_MULTILIB_CONFIG)
6270 AC_SUBST(TM_MULTILIB_EXCEPTIONS_CONFIG)
6271 AC_SUBST(extra_gcc_objs)
6272 AC_SUBST(user_headers_inc_next_pre)
6273 AC_SUBST(user_headers_inc_next_post)
6274 AC_SUBST(extra_headers_list)
6275 AC_SUBST(extra_objs)
6276 AC_SUBST(extra_programs)
6277 AC_SUBST(float_h_file)
6278 AC_SUBST(gcc_config_arguments)
6279 AC_SUBST(gcc_gxx_include_dir)
6280 AC_SUBST(gcc_gxx_include_dir_add_sysroot)
6281 AC_SUBST(host_exeext)
6282 AC_SUBST(host_xm_file_list)
6283 AC_SUBST(host_xm_include_list)
6284 AC_SUBST(host_xm_defines)
6285 AC_SUBST(out_host_hook_obj)
6286 AC_SUBST(install)
6287 AC_SUBST(lang_opt_files)
6288 AC_SUBST(lang_specs_files)
6289 AC_SUBST(lang_tree_files)
6290 AC_SUBST(local_prefix)
6291 AC_SUBST(md_file)
6292 AC_SUBST(objc_boehm_gc)
6293 AC_SUBST(out_file)
6294 AC_SUBST(out_object_file)
6295 AC_SUBST(common_out_file)
6296 AC_SUBST(common_out_object_file)
6297 AC_SUBST(tm_file_list)
6298 AC_SUBST(tm_include_list)
6299 AC_SUBST(tm_defines)
6300 AC_SUBST(tm_p_file_list)
6301 AC_SUBST(tm_p_include_list)
6302 AC_SUBST(xm_file_list)
6303 AC_SUBST(xm_include_list)
6304 AC_SUBST(xm_defines)
6305 AC_SUBST(use_gcc_stdint)
6306 AC_SUBST(c_target_objs)
6307 AC_SUBST(cxx_target_objs)
6308 AC_SUBST(fortran_target_objs)
6309 AC_SUBST(target_cpu_default)
6310
6311 AC_SUBST_FILE(language_hooks)
6312
6313 # Echo link setup.
6314 if test x${build} = x${host} ; then
6315   if test x${host} = x${target} ; then
6316     echo "Links are now set up to build a native compiler for ${target}." 1>&2
6317   else
6318     echo "Links are now set up to build a cross-compiler" 1>&2
6319     echo " from ${host} to ${target}." 1>&2
6320   fi
6321 else
6322   if test x${host} = x${target} ; then
6323     echo "Links are now set up to build (on ${build}) a native compiler" 1>&2
6324     echo " for ${target}." 1>&2
6325   else
6326     echo "Links are now set up to build (on ${build}) a cross-compiler" 1>&2
6327     echo " from ${host} to ${target}." 1>&2
6328   fi
6329 fi
6330
6331 AC_ARG_VAR(GMPLIBS,[How to link GMP])
6332 AC_ARG_VAR(GMPINC,[How to find GMP include files])
6333
6334 AC_ARG_VAR(ISLLIBS,[How to link isl])
6335 AC_ARG_VAR(ISLINC,[How to find isl include files])
6336 if test "x${ISLLIBS}" != "x" ; then
6337    AC_DEFINE(HAVE_isl, 1, [Define if isl is in use.])
6338 fi
6339
6340 GCC_ENABLE_PLUGINS
6341 AC_SUBST(pluginlibs)
6342 AC_SUBST(enable_plugin)
6343 if test x"$enable_plugin" = x"yes"; then
6344   AC_DEFINE(ENABLE_PLUGIN, 1, [Define to enable plugin support.])
6345 fi
6346
6347
6348 # Enable --enable-host-shared
6349 AC_ARG_ENABLE(host-shared,
6350 [AS_HELP_STRING([--enable-host-shared],
6351                 [build host code as shared libraries])],
6352 [PICFLAG=-fPIC], [PICFLAG=])
6353 AC_SUBST(enable_host_shared)
6354 AC_SUBST(PICFLAG)
6355
6356
6357 AC_ARG_ENABLE(libquadmath-support,
6358 [AS_HELP_STRING([--disable-libquadmath-support],
6359   [disable libquadmath support for Fortran])],
6360 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
6361 ENABLE_LIBQUADMATH_SUPPORT=yes)
6362 if test "${ENABLE_LIBQUADMATH_SUPPORT}" != "no" ; then
6363   AC_DEFINE(ENABLE_LIBQUADMATH_SUPPORT, 1,
6364             [Define to 1 to enable libquadmath support])
6365 fi
6366
6367
6368 # Specify what hash style to use by default.
6369 AC_ARG_WITH([linker-hash-style],
6370 [AC_HELP_STRING([--with-linker-hash-style={sysv,gnu,both}],
6371                 [specify the linker hash style])],
6372 [case x"$withval" in
6373    xsysv)
6374      LINKER_HASH_STYLE=sysv
6375      ;;
6376    xgnu)
6377      LINKER_HASH_STYLE=gnu
6378      ;;
6379    xboth)
6380      LINKER_HASH_STYLE=both
6381      ;;
6382    *)
6383      AC_MSG_ERROR([$withval is an invalid option to --with-linker-hash-style])
6384      ;;
6385  esac],
6386 [LINKER_HASH_STYLE=''])
6387 if test x"${LINKER_HASH_STYLE}" != x; then
6388   AC_DEFINE_UNQUOTED(LINKER_HASH_STYLE, "$LINKER_HASH_STYLE",
6389                                          [The linker hash style])
6390 fi
6391
6392 # Specify what should be the default of -fdiagnostics-color option.
6393 AC_ARG_WITH([diagnostics-color],
6394 [AC_HELP_STRING([--with-diagnostics-color={never,auto,auto-if-env,always}],
6395                 [specify the default of -fdiagnostics-color option
6396                  auto-if-env stands for -fdiagnostics-color=auto if
6397                  GCC_COLOR environment variable is present and
6398                  -fdiagnostics-color=never otherwise])],
6399 [case x"$withval" in
6400    xnever)
6401      DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_NO
6402      ;;
6403    xauto)
6404      DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_AUTO
6405      ;;
6406    xauto-if-env)
6407      DIAGNOSTICS_COLOR_DEFAULT=-1
6408      ;;
6409    xalways)
6410      DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_YES
6411      ;;
6412    *)
6413      AC_MSG_ERROR([$withval is an invalid option to --with-diagnostics-color])
6414      ;;
6415  esac],
6416 [DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_AUTO])
6417 AC_DEFINE_UNQUOTED(DIAGNOSTICS_COLOR_DEFAULT, $DIAGNOSTICS_COLOR_DEFAULT,
6418                    [The default for -fdiagnostics-color option])
6419
6420 # Generate gcc-driver-name.h containing GCC_DRIVER_NAME for the benefit
6421 # of jit/jit-playback.c.
6422 gcc_driver_version=`eval "${get_gcc_base_ver} $srcdir/BASE-VER"`
6423 echo "gcc_driver_version: ${gcc_driver_version}"
6424 cat > gcc-driver-name.h <<EOF
6425 #define GCC_DRIVER_NAME "${target_noncanonical}-gcc-${gcc_driver_version}${exeext}"
6426 EOF
6427
6428 # Check whether --enable-default-pie was given.
6429 AC_ARG_ENABLE(default-pie,
6430 [AS_HELP_STRING([--enable-default-pie],
6431   [enable Position Independent Executable as default])],
6432 enable_default_pie=$enableval,
6433 enable_default_pie=no)
6434 if test x$enable_default_pie = xyes ; then
6435   AC_DEFINE(ENABLE_DEFAULT_PIE, 1,
6436       [Define if your target supports default PIE and it is enabled.])
6437 fi
6438 AC_SUBST([enable_default_pie])
6439
6440 # Check if -fno-PIE works.
6441 AC_CACHE_CHECK([for -fno-PIE option],
6442   [gcc_cv_c_no_fpie],
6443   [saved_CXXFLAGS="$CXXFLAGS"
6444    CXXFLAGS="$CXXFLAGS -fno-PIE"
6445    AC_COMPILE_IFELSE([int main(void) {return 0;}],
6446      [gcc_cv_c_no_fpie=yes],
6447      [gcc_cv_c_no_fpie=no])
6448    CXXFLAGS="$saved_CXXFLAGS"])
6449 if test "$gcc_cv_c_no_fpie" = "yes"; then
6450   NO_PIE_CFLAGS="-fno-PIE"
6451 fi
6452 AC_SUBST([NO_PIE_CFLAGS])
6453
6454 # Check if -no-pie works.
6455 AC_CACHE_CHECK([for -no-pie option],
6456   [gcc_cv_no_pie],
6457   [saved_LDFLAGS="$LDFLAGS"
6458    LDFLAGS="$LDFLAGS -no-pie"
6459    AC_LINK_IFELSE([int main(void) {return 0;}],
6460      [gcc_cv_no_pie=yes],
6461      [gcc_cv_no_pie=no])
6462    LDFLAGS="$saved_LDFLAGS"])
6463 if test "$gcc_cv_no_pie" = "yes"; then
6464   NO_PIE_FLAG="-no-pie"
6465 fi
6466 AC_SUBST([NO_PIE_FLAG])
6467
6468 # Check linker supports '-z bndplt'
6469 ld_bndplt_support=no
6470 AC_MSG_CHECKING(linker -z bndplt option)
6471 if test x"$ld_is_gold" = xno; then
6472   if test $in_tree_ld = yes ; then
6473     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 25 -o "$gcc_cv_gld_major_version" -gt 2; then
6474       ld_bndplt_support=yes
6475     fi
6476   elif test x$gcc_cv_ld != x; then
6477     # Check if linker supports -a bndplt option
6478     if $gcc_cv_ld --help 2>&1 | grep -- '-z bndplt' > /dev/null; then
6479       ld_bndplt_support=yes
6480     fi
6481   fi
6482 fi
6483 if test x"$ld_bndplt_support" = xyes; then
6484   AC_DEFINE(HAVE_LD_BNDPLT_SUPPORT, 1,
6485         [Define if your linker supports -z bndplt])
6486 fi
6487 AC_MSG_RESULT($ld_bndplt_support)
6488
6489 # Check linker supports '--push-state'/'--pop-state'
6490 ld_pushpopstate_support=no
6491 AC_MSG_CHECKING(linker --push-state/--pop-state options)
6492 if test x"$ld_is_gold" = xno; then
6493   if test $in_tree_ld = yes ; then
6494     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 25 -o "$gcc_cv_gld_major_version" -gt 2; then
6495       ld_pushpopstate_support=yes
6496     fi
6497   elif test x$gcc_cv_ld != x; then
6498     # Check if linker supports --push-state/--pop-state options
6499     if $gcc_cv_ld --help 2>&1 | grep -- '--push-state' > /dev/null; then
6500       ld_pushpopstate_support=yes
6501     fi
6502   fi
6503 fi
6504 if test x"$ld_pushpopstate_support" = xyes; then
6505   AC_DEFINE(HAVE_LD_PUSHPOPSTATE_SUPPORT, 1,
6506         [Define if your linker supports --push-state/--pop-state])
6507 fi
6508 AC_MSG_RESULT($ld_pushpopstate_support)
6509
6510 # Configure the subdirectories
6511 # AC_CONFIG_SUBDIRS($subdirs)
6512
6513 # Create the Makefile
6514 # and configure language subdirectories
6515 AC_CONFIG_FILES($all_outputs)
6516
6517 AC_CONFIG_COMMANDS([default],
6518 [
6519 case ${CONFIG_HEADERS} in
6520   *auto-host.h:config.in*)
6521   echo > cstamp-h ;;
6522 esac
6523 # Make sure all the subdirs exist.
6524 for d in $subdirs doc build common c-family
6525 do
6526     test -d $d || mkdir $d
6527 done
6528 ],
6529 [subdirs='$subdirs'])
6530 AC_OUTPUT
6531