gcc/configure.ac

   1 # configure.ac for GCC
   2 # Process this file with autoconf to generate a configuration script.
   3
   4 # Copyright (C) 1997-2014 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 target name, for directory use.
  39 ACX_NONCANONICAL_TARGET
  40
  41 # Determine the target- and build-specific subdirectories
  42 GCC_TOPLEV_SUBDIRS
  43
  44 # Set program_transform_name
  45 AC_ARG_PROGRAM
  46
  47 # Check for bogus environment variables.
  48 # Test if LIBRARY_PATH contains the notation for the current directory
  49 # since this would lead to problems installing/building glibc.
  50 # LIBRARY_PATH contains the current directory if one of the following
  51 # is true:
  52 # - one of the terminals (":" and ";") is the first or last sign
  53 # - two terminals occur directly after each other
  54 # - the path contains an element with a dot in it
  55 AC_MSG_CHECKING(LIBRARY_PATH variable)
  56 changequote(,)dnl
  57 case ${LIBRARY_PATH} in
  58   [:\;]* | *[:\;] | *[:\;][:\;]* |  *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
  59     library_path_setting="contains current directory"
  60     ;;
  61   *)
  62     library_path_setting="ok"
  63     ;;
  64 esac
  65 changequote([,])dnl
  66 AC_MSG_RESULT($library_path_setting)
  67 if test "$library_path_setting" != "ok"; then
  68 AC_MSG_ERROR([
  69 *** LIBRARY_PATH shouldn't contain the current directory when
  70 *** building gcc. Please change the environment variable
  71 *** and run configure again.])
  72 fi
  73
  74 # Test if GCC_EXEC_PREFIX contains the notation for the current directory
  75 # since this would lead to problems installing/building glibc.
  76 # GCC_EXEC_PREFIX contains the current directory if one of the following
  77 # is true:
  78 # - one of the terminals (":" and ";") is the first or last sign
  79 # - two terminals occur directly after each other
  80 # - the path contains an element with a dot in it
  81 AC_MSG_CHECKING(GCC_EXEC_PREFIX variable)
  82 changequote(,)dnl
  83 case ${GCC_EXEC_PREFIX} in
  84   [:\;]* | *[:\;] | *[:\;][:\;]* |  *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
  85     gcc_exec_prefix_setting="contains current directory"
  86     ;;
  87   *)
  88     gcc_exec_prefix_setting="ok"
  89     ;;
  90 esac
  91 changequote([,])dnl
  92 AC_MSG_RESULT($gcc_exec_prefix_setting)
  93 if test "$gcc_exec_prefix_setting" != "ok"; then
  94 AC_MSG_ERROR([
  95 *** GCC_EXEC_PREFIX shouldn't contain the current directory when
  96 *** building gcc. Please change the environment variable
  97 *** and run configure again.])
  98 fi
  99
 100 # -----------
 101 # Directories
 102 # -----------
 103
 104 # Specify the local prefix
 105 local_prefix=
 106 AC_ARG_WITH(local-prefix,
 107 [AS_HELP_STRING([--with-local-prefix=DIR],
 108                 [specifies directory to put local include])],
 109 [case "${withval}" in
 110 yes)    AC_MSG_ERROR(bad value ${withval} given for local include directory prefix) ;;
 111 no)     ;;
 112 *)      local_prefix=$with_local_prefix ;;
 113 esac])
 114
 115 # Default local prefix if it is empty
 116 if test x$local_prefix = x; then
 117         local_prefix=/usr/local
 118 fi
 119
 120 # Don't set gcc_gxx_include_dir to gxx_include_dir since that's only
 121 # passed in by the toplevel make and thus we'd get different behavior
 122 # depending on where we built the sources.
 123 gcc_gxx_include_dir=
 124 # Specify the g++ header file directory
 125 AC_ARG_WITH(gxx-include-dir,
 126 [AS_HELP_STRING([--with-gxx-include-dir=DIR],
 127                 [specifies directory to put g++ header files])],
 128 [case "${withval}" in
 129 yes)    AC_MSG_ERROR(bad value ${withval} given for g++ include directory) ;;
 130 no)     ;;
 131 *)      gcc_gxx_include_dir=$with_gxx_include_dir ;;
 132 esac])
 133
 134 # This logic must match libstdc++-v3/acinclude.m4:GLIBCXX_EXPORT_INSTALL_INFO.
 135 if test x${gcc_gxx_include_dir} = x; then
 136   if test x${enable_version_specific_runtime_libs} = xyes; then
 137     gcc_gxx_include_dir='${libsubdir}/include/c++'
 138   else
 139     libstdcxx_incdir='include/c++/$(version)'
 140     if test x$host != x$target; then
 141        libstdcxx_incdir="$target_alias/$libstdcxx_incdir"
 142     fi
 143     gcc_gxx_include_dir="\$(libsubdir)/\$(libsubdir_to_prefix)$libstdcxx_incdir"
 144   fi
 145 fi
 146
 147 gcc_gxx_include_dir_add_sysroot=0
 148 if test "${with_sysroot+set}" = set; then
 149   gcc_gxx_without_sysroot=`expr "${gcc_gxx_include_dir}" : "${with_sysroot}"'\(.*\)'`
 150   if test "${gcc_gxx_without_sysroot}"; then
 151     gcc_gxx_include_dir="${gcc_gxx_without_sysroot}"
 152     gcc_gxx_include_dir_add_sysroot=1
 153   fi
 154 fi
 155
 156 AC_ARG_WITH(cpp_install_dir,
 157 [AC_HELP_STRING([--with-cpp-install-dir=DIR],
 158                 [install the user visible C preprocessor in DIR
 159                  (relative to PREFIX) as well as PREFIX/bin])],
 160 [if test x$withval = xyes; then
 161   AC_MSG_ERROR([option --with-cpp-install-dir requires an argument])
 162 elif test x$withval != xno; then
 163   cpp_install_dir=$withval
 164 fi])
 165
 166 # We would like to our source tree to be readonly.  However when releases or
 167 # pre-releases are generated, the flex/bison generated files as well as the
 168 # various formats of manuals need to be included along with the rest of the
 169 # sources.  Therefore we have --enable-generated-files-in-srcdir to do
 170 # just that.
 171
 172 AC_MSG_CHECKING([whether to place generated files in the source directory])
 173   dnl generated-files-in-srcdir is disabled by default
 174   AC_ARG_ENABLE(generated-files-in-srcdir,
 175     [AS_HELP_STRING([--enable-generated-files-in-srcdir],
 176                     [put copies of generated files in source dir
 177                      intended for creating source tarballs for users
 178                      without texinfo bison or flex])],
 179       generated_files_in_srcdir=$enableval,
 180       generated_files_in_srcdir=no)
 181
 182 AC_MSG_RESULT($generated_files_in_srcdir)
 183
 184 if test "$generated_files_in_srcdir" = "yes"; then
 185   GENINSRC=''
 186 else
 187   GENINSRC='#'
 188 fi
 189 AC_SUBST(GENINSRC)
 190
 191 # -------------------
 192 # Find default linker
 193 # -------------------
 194
 195 # With GNU ld
 196 AC_ARG_WITH(gnu-ld,
 197 [AS_HELP_STRING([--with-gnu-ld], [arrange to work with GNU ld])],
 198 gnu_ld_flag="$with_gnu_ld",
 199 gnu_ld_flag=no)
 200
 201 # With pre-defined ld
 202 AC_ARG_WITH(ld,
 203 [AS_HELP_STRING([--with-ld], [arrange to use the specified ld (full pathname)])],
 204 DEFAULT_LINKER="$with_ld")
 205 if test x"${DEFAULT_LINKER+set}" = x"set"; then
 206   if test ! -x "$DEFAULT_LINKER"; then
 207     AC_MSG_ERROR([cannot execute: $DEFAULT_LINKER: check --with-ld or env. var. DEFAULT_LINKER])
 208   elif $DEFAULT_LINKER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
 209     gnu_ld_flag=yes
 210   fi
 211   AC_DEFINE_UNQUOTED(DEFAULT_LINKER,"$DEFAULT_LINKER",
 212         [Define to enable the use of a default linker.])
 213 fi
 214
 215 AC_MSG_CHECKING([whether a default linker was specified])
 216 if test x"${DEFAULT_LINKER+set}" = x"set"; then
 217   if test x"$gnu_ld_flag" = x"no"; then
 218     AC_MSG_RESULT([yes ($DEFAULT_LINKER)])
 219   else
 220     AC_MSG_RESULT([yes ($DEFAULT_LINKER - GNU ld)])
 221   fi
 222 else
 223   AC_MSG_RESULT(no)
 224 fi
 225
 226 # With demangler in GNU ld
 227 AC_ARG_WITH(demangler-in-ld,
 228 [AS_HELP_STRING([--with-demangler-in-ld], [try to use demangler in GNU ld])],
 229 demangler_in_ld="$with_demangler_in_ld",
 230 demangler_in_ld=yes)
 231
 232 # ----------------------
 233 # Find default assembler
 234 # ----------------------
 235
 236 # With GNU as
 237 AC_ARG_WITH(gnu-as,
 238 [AS_HELP_STRING([--with-gnu-as], [arrange to work with GNU as])],
 239 gas_flag="$with_gnu_as",
 240 gas_flag=no)
 241
 242 AC_ARG_WITH(as,
 243 [AS_HELP_STRING([--with-as], [arrange to use the specified as (full pathname)])],
 244 DEFAULT_ASSEMBLER="$with_as")
 245 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
 246   if test ! -x "$DEFAULT_ASSEMBLER"; then
 247     AC_MSG_ERROR([cannot execute: $DEFAULT_ASSEMBLER: check --with-as or env. var. DEFAULT_ASSEMBLER])
 248   elif $DEFAULT_ASSEMBLER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
 249     gas_flag=yes
 250   fi
 251   AC_DEFINE_UNQUOTED(DEFAULT_ASSEMBLER,"$DEFAULT_ASSEMBLER",
 252         [Define to enable the use of a default assembler.])
 253 fi
 254
 255 AC_MSG_CHECKING([whether a default assembler was specified])
 256 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
 257   if test x"$gas_flag" = x"no"; then
 258     AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER)])
 259   else
 260     AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER - GNU as)])
 261   fi
 262 else
 263   AC_MSG_RESULT(no)
 264 fi
 265
 266 # ---------------
 267 # Find C compiler
 268 # ---------------
 269
 270 # If a non-executable a.out is present (e.g. created by GNU as above even if
 271 # invoked with -v only), the IRIX 6 native ld just overwrites the existing
 272 # file, even when creating an executable, so an execution test fails.
 273 # Remove possible default executable files to avoid this.
 274 #
 275 # FIXME: This really belongs into AC_PROG_CC and can be removed once
 276 # Autoconf includes it.
 277 rm -f a.out a.exe b.out
 278
 279 # Find the native compiler
 280 AC_PROG_CC
 281 AC_PROG_CXX
 282 ACX_PROG_GNAT([-I"$srcdir"/ada])
 283
 284 # Remove the -O2: for historical reasons, unless bootstrapping we prefer
 285 # optimizations to be activated explicitly by the toplevel.
 286 case "$CC" in
 287   */prev-gcc/xgcc*) ;;
 288   *) CFLAGS=`echo "$CFLAGS " | sed -e "s/-Ofast[[       ]]//" -e "s/-O[[gs]][[  ]]//" -e "s/-O[[0-9]]*[[        ]]//" `
 289      CXXFLAGS=`echo "$CXXFLAGS " | sed -e "s/-Ofast[[   ]]//" -e "s/-O[[gs]][[  ]]//" -e "s/-O[[0-9]]*[[        ]]//" ` ;;
 290 esac
 291 AC_SUBST(CFLAGS)
 292 AC_SUBST(CXXFLAGS)
 293
 294 # Determine PICFLAG for target gnatlib.
 295 GCC_PICFLAG_FOR_TARGET
 296 AC_SUBST(PICFLAG_FOR_TARGET)
 297
 298 # -------------------------
 299 # Check C compiler features
 300 # -------------------------
 301
 302 AC_USE_SYSTEM_EXTENSIONS
 303 AC_PROG_CPP
 304 AC_C_INLINE
 305
 306 AC_SYS_LARGEFILE
 307
 308 # sizeof(char) is 1 by definition.
 309 AC_CHECK_SIZEOF(void *)
 310 AC_CHECK_SIZEOF(short)
 311 AC_CHECK_SIZEOF(int)
 312 AC_CHECK_SIZEOF(long)
 313 AC_CHECK_TYPES([long long], [AC_CHECK_SIZEOF(long long)])
 314 GCC_STDINT_TYPES
 315 if test x"$ac_cv_c_uint64_t" = x"no" -o x"$ac_cv_c_int64_t" = x"no"; then
 316   AC_MSG_ERROR([uint64_t or int64_t not found])
 317 fi
 318
 319 # check what underlying integer type int64_t uses
 320 AC_LANG_PUSH(C++)
 321 AC_CACHE_CHECK(for int64_t underlying type, ac_cv_int64_t_type, [
 322 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 323 #ifdef HAVE_STDINT_H
 324 #include <stdint.h>
 325 #endif
 326 template <typename T> struct X { };
 327 template <>
 328 struct X<long> { typedef long t; };
 329 ]], [[X<int64_t>::t x;]])],[ac_cv_int64_t_type=long],[ac_cv_int64_t_type="long long"])])
 330 if test "$ac_cv_int64_t_type" = "long"; then
 331   AC_DEFINE(INT64_T_IS_LONG, 1,
 332   [Define if int64_t uses long as underlying type.])
 333 else
 334 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 335 #ifdef HAVE_STDINT_H
 336 #include <stdint.h>
 337 #endif
 338 template <typename T> struct X { };
 339 template <>
 340 struct X<long long> { typedef long long t; };
 341 ]], [[X<int64_t>::t x;]])],[],[AC_MSG_ERROR([error verifying int64_t uses long long])])
 342 fi
 343 AC_LANG_POP(C++)
 344
 345
 346
 347
 348 # ---------------------
 349 # Warnings and checking
 350 # ---------------------
 351
 352 # Check $CC warning features (if it's GCC).
 353 # We want to use -pedantic, but we don't want warnings about
 354 # * 'long long'
 355 # * variadic macros
 356 # * overlong strings
 357 # * C++11 narrowing conversions in { }
 358 # So, we only use -pedantic if we can disable those warnings.
 359
 360 # In stage 1, disable -Wformat warnings from old GCCs about new % codes
 361 AC_ARG_ENABLE(build-format-warnings,
 362   AS_HELP_STRING([--disable-build-format-warnings],[don't use -Wformat while building GCC]),
 363   [],[enable_build_format_warnings=yes])
 364 AS_IF([test $enable_build_format_warnings = no],
 365       [wf_opt=-Wno-format],[wf_opt=])
 366 ACX_PROG_CC_WARNING_OPTS(
 367         m4_quote(m4_do([-W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual $wf_opt])), [loose_warn])
 368 ACX_PROG_CC_WARNING_OPTS(
 369         m4_quote(m4_do([-Wstrict-prototypes -Wmissing-prototypes])),
 370         [c_loose_warn])
 371 ACX_PROG_CC_WARNING_OPTS(
 372         m4_quote(m4_do([-Wmissing-format-attribute])), [strict_warn])
 373 ACX_PROG_CC_WARNING_OPTS(
 374         m4_quote(m4_do([-Woverloaded-virtual])), [strict_warn])
 375 ACX_PROG_CC_WARNING_OPTS(
 376         m4_quote(m4_do([-Wold-style-definition -Wc++-compat])), [c_strict_warn])
 377 ACX_PROG_CC_WARNING_ALMOST_PEDANTIC(
 378         m4_quote(m4_do([-Wno-long-long -Wno-variadic-macros ],
 379                        [-Wno-overlength-strings])), [strict_warn])
 380 ACX_PROG_CC_WARNINGS_ARE_ERRORS([manual], [strict_warn])
 381
 382 # The above macros do nothing if the compiler is not GCC.  However, the
 383 # Makefile has more goo to add other flags, so these variables are used
 384 # to enable warnings only for GCC.
 385 warn_cflags=
 386 warn_cxxflags=
 387 if test "x$GCC" = "xyes"; then
 388   warn_cflags='$(GCC_WARN_CFLAGS)'
 389   warn_cxxflags='$(GCC_WARN_CXXFLAGS)'
 390 fi
 391 AC_SUBST(warn_cflags)
 392 AC_SUBST(warn_cxxflags)
 393
 394 # Disable exceptions and RTTI if building with g++
 395 ACX_PROG_CC_WARNING_OPTS(
 396         m4_quote(m4_do([-fno-exceptions -fno-rtti -fasynchronous-unwind-tables])),
 397                        [noexception_flags])
 398
 399 # Enable expensive internal checks
 400 is_release=
 401 if test x"`cat $srcdir/DEV-PHASE`" != xexperimental; then
 402   is_release=yes
 403 fi
 404
 405 AC_ARG_ENABLE(checking,
 406 [AS_HELP_STRING([[--enable-checking[=LIST]]],
 407                 [enable expensive run-time checks.  With LIST,
 408                  enable only specific categories of checks.
 409                  Categories are: yes,no,all,none,release.
 410                  Flags are: assert,df,fold,gc,gcac,gimple,misc,
 411                  rtlflag,rtl,runtime,tree,valgrind,types])],
 412 [ac_checking_flags="${enableval}"],[
 413 # Determine the default checks.
 414 if test x$is_release = x ; then
 415   ac_checking_flags=yes
 416 else
 417   ac_checking_flags=release
 418 fi])
 419 IFS="${IFS=     }"; ac_save_IFS="$IFS"; IFS="$IFS,"
 420 for check in release $ac_checking_flags
 421 do
 422         case $check in
 423         # these set all the flags to specific states
 424         yes)            ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking= ;
 425                         ac_fold_checking= ; ac_gc_checking=1 ;
 426                         ac_gc_always_collect= ; ac_gimple_checking=1 ; ac_rtl_checking= ;
 427                         ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
 428                         ac_tree_checking=1 ; ac_valgrind_checking= ;
 429                         ac_types_checking=1 ;;
 430         no|none)        ac_assert_checking= ; ac_checking= ; ac_df_checking= ;
 431                         ac_fold_checking= ; ac_gc_checking= ;
 432                         ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
 433                         ac_rtlflag_checking= ; ac_runtime_checking= ;
 434                         ac_tree_checking= ; ac_valgrind_checking= ;
 435                         ac_types_checking= ;;
 436         all)            ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking=1 ;
 437                         ac_fold_checking=1 ; ac_gc_checking=1 ;
 438                         ac_gc_always_collect=1 ; ac_gimple_checking=1 ; ac_rtl_checking=1 ;
 439                         ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
 440                         ac_tree_checking=1 ; ac_valgrind_checking= ;
 441                         ac_types_checking=1 ;;
 442         release)        ac_assert_checking=1 ; ac_checking= ; ac_df_checking= ;
 443                         ac_fold_checking= ; ac_gc_checking= ;
 444                         ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
 445                         ac_rtlflag_checking= ; ac_runtime_checking=1 ;
 446                         ac_tree_checking= ; ac_valgrind_checking= ;
 447                         ac_types_checking= ;;
 448         # these enable particular checks
 449         assert)         ac_assert_checking=1 ;;
 450         df)             ac_df_checking=1 ;;
 451         fold)           ac_fold_checking=1 ;;
 452         gc)             ac_gc_checking=1 ;;
 453         gcac)           ac_gc_always_collect=1 ;;
 454         gimple)         ac_gimple_checking=1 ;;
 455         misc)           ac_checking=1 ;;
 456         rtl)            ac_rtl_checking=1 ;;
 457         rtlflag)        ac_rtlflag_checking=1 ;;
 458         runtime)        ac_runtime_checking=1 ;;
 459         tree)           ac_tree_checking=1 ;;
 460         types)          ac_types_checking=1 ;;
 461         valgrind)       ac_valgrind_checking=1 ;;
 462         *)      AC_MSG_ERROR(unknown check category $check) ;;
 463         esac
 464 done
 465 IFS="$ac_save_IFS"
 466
 467 nocommon_flag=""
 468 if test x$ac_checking != x ; then
 469   AC_DEFINE(ENABLE_CHECKING, 1,
 470 [Define if you want more run-time sanity checks.  This one gets a grab
 471    bag of miscellaneous but relatively cheap checks.])
 472   nocommon_flag=-fno-common
 473 fi
 474 AC_SUBST(nocommon_flag)
 475 if test x$ac_df_checking != x ; then
 476   AC_DEFINE(ENABLE_DF_CHECKING, 1,
 477 [Define if you want more run-time sanity checks for dataflow.])
 478 fi
 479 if test x$ac_assert_checking != x ; then
 480   AC_DEFINE(ENABLE_ASSERT_CHECKING, 1,
 481 [Define if you want assertions enabled.  This is a cheap check.])
 482 fi
 483 if test x$ac_gimple_checking != x ; then
 484   AC_DEFINE(ENABLE_GIMPLE_CHECKING, 1,
 485 [Define if you want operations on GIMPLE (the basic data structure of
 486 the high-level optimizers) to be checked for dynamic type safety at
 487 runtime.  This is moderately expensive.])
 488 fi
 489 GCC_TARGET_TEMPLATE(ENABLE_RUNTIME_CHECKING)
 490 if test x$ac_runtime_checking != x ; then
 491   AC_DEFINE(ENABLE_RUNTIME_CHECKING, 1,
 492 [Define if you want runtime assertions enabled.  This is a cheap check.])
 493 fi
 494 if test x$ac_tree_checking != x ; then
 495   AC_DEFINE(ENABLE_TREE_CHECKING, 1,
 496 [Define if you want all operations on trees (the basic data
 497    structure of the front ends) to be checked for dynamic type safety
 498    at runtime.  This is moderately expensive.  The tree browser debugging
 499    routines will also be enabled by this option.
 500    ])
 501   TREEBROWSER=tree-browser.o
 502   TREECHECKING=yes
 503 fi
 504 if test x$ac_types_checking != x ; then
 505   AC_DEFINE(ENABLE_TYPES_CHECKING, 1,
 506 [Define if you want all gimple types to be verified after gimplifiation.
 507    This is cheap.
 508    ])
 509 fi
 510 AC_SUBST(TREEBROWSER)
 511 AC_SUBST(TREECHECKING)
 512 if test x$ac_rtl_checking != x ; then
 513   AC_DEFINE(ENABLE_RTL_CHECKING, 1,
 514 [Define if you want all operations on RTL (the basic data structure
 515    of the optimizer and back end) to be checked for dynamic type safety
 516    at runtime.  This is quite expensive.])
 517 fi
 518 if test x$ac_rtlflag_checking != x ; then
 519   AC_DEFINE(ENABLE_RTL_FLAG_CHECKING, 1,
 520 [Define if you want RTL flag accesses to be checked against the RTL
 521    codes that are supported for each access macro.  This is relatively
 522    cheap.])
 523 fi
 524 if test x$ac_gc_checking != x ; then
 525   AC_DEFINE(ENABLE_GC_CHECKING, 1,
 526 [Define if you want the garbage collector to do object poisoning and
 527    other memory allocation checks.  This is quite expensive.])
 528 fi
 529 if test x$ac_gc_always_collect != x ; then
 530   AC_DEFINE(ENABLE_GC_ALWAYS_COLLECT, 1,
 531 [Define if you want the garbage collector to operate in maximally
 532    paranoid mode, validating the entire heap and collecting garbage at
 533    every opportunity.  This is extremely expensive.])
 534 fi
 535 if test x$ac_fold_checking != x ; then
 536   AC_DEFINE(ENABLE_FOLD_CHECKING, 1,
 537 [Define if you want fold checked that it never destructs its argument.
 538    This is quite expensive.])
 539 fi
 540 valgrind_path_defines=
 541 valgrind_command=
 542
 543 dnl # This check AC_REQUIREs various stuff, so it *must not* be inside
 544 dnl # an if statement.  This was the source of very frustrating bugs
 545 dnl # in converting to autoconf 2.5x!
 546 AC_CHECK_HEADER(valgrind.h, have_valgrind_h=yes, have_valgrind_h=no)
 547
 548 # It is certainly possible that there's valgrind but no valgrind.h.
 549 # GCC relies on making annotations so we must have both.
 550 AC_MSG_CHECKING(for VALGRIND_DISCARD in <valgrind/memcheck.h>)
 551 AC_PREPROC_IFELSE([AC_LANG_SOURCE(
 552   [[#include <valgrind/memcheck.h>
 553 #ifndef VALGRIND_DISCARD
 554 #error VALGRIND_DISCARD not defined
 555 #endif]])],
 556   [gcc_cv_header_valgrind_memcheck_h=yes],
 557   [gcc_cv_header_valgrind_memcheck_h=no])
 558 AC_MSG_RESULT($gcc_cv_header_valgrind_memcheck_h)
 559 AC_MSG_CHECKING(for VALGRIND_DISCARD in <memcheck.h>)
 560 AC_PREPROC_IFELSE([AC_LANG_SOURCE(
 561   [[#include <memcheck.h>
 562 #ifndef VALGRIND_DISCARD
 563 #error VALGRIND_DISCARD not defined
 564 #endif]])],
 565   [gcc_cv_header_memcheck_h=yes],
 566   [gcc_cv_header_memcheck_h=no])
 567 AC_MSG_RESULT($gcc_cv_header_memcheck_h)
 568 if test $gcc_cv_header_valgrind_memcheck_h = yes; then
 569   AC_DEFINE(HAVE_VALGRIND_MEMCHECK_H, 1,
 570         [Define if valgrind's valgrind/memcheck.h header is installed.])
 571 fi
 572 if test $gcc_cv_header_memcheck_h = yes; then
 573   AC_DEFINE(HAVE_MEMCHECK_H, 1,
 574         [Define if valgrind's memcheck.h header is installed.])
 575 fi
 576
 577 if test x$ac_valgrind_checking != x ; then
 578   AM_PATH_PROG_WITH_TEST(valgrind_path, valgrind,
 579         [$ac_dir/$ac_word --version | grep valgrind- >/dev/null 2>&1])
 580   if test "x$valgrind_path" = "x" \
 581     || (test $have_valgrind_h = no \
 582         && test $gcc_cv_header_memcheck_h = no \
 583         && test $gcc_cv_header_valgrind_memcheck_h = no); then
 584         AC_MSG_ERROR([*** Can't find both valgrind and valgrind/memcheck.h, memcheck.h or valgrind.h])
 585   fi
 586   valgrind_path_defines=-DVALGRIND_PATH='\"'$valgrind_path'\"'
 587   valgrind_command="$valgrind_path -q"
 588   AC_DEFINE(ENABLE_VALGRIND_CHECKING, 1,
 589 [Define if you want to run subprograms and generated programs
 590    through valgrind (a memory checker).  This is extremely expensive.])
 591 fi
 592 AC_SUBST(valgrind_path_defines)
 593 AC_SUBST(valgrind_command)
 594
 595 # Enable code coverage collection
 596 AC_ARG_ENABLE(coverage,
 597 [AS_HELP_STRING([[--enable-coverage[=LEVEL]]],
 598                 [enable compiler's code coverage collection.
 599                  Use to measure compiler performance and locate
 600                  unused parts of the compiler. With LEVEL, specify
 601                  optimization. Values are opt, noopt,
 602                  default is noopt])],
 603 [case "${enableval}" in
 604   yes|noopt)
 605     coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O0"
 606     ;;
 607   opt)
 608     coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O2"
 609     ;;
 610   no)
 611     # a.k.a. --disable-coverage
 612     coverage_flags=""
 613     ;;
 614   *)
 615     AC_MSG_ERROR(unknown coverage setting $enableval)
 616     ;;
 617 esac],
 618 [coverage_flags=""])
 619 AC_SUBST(coverage_flags)
 620
 621 AC_ARG_ENABLE(gather-detailed-mem-stats,
 622 [AS_HELP_STRING([--enable-gather-detailed-mem-stats],
 623                 [enable detailed memory allocation stats gathering])], [],
 624 [enable_gather_detailed_mem_stats=no])
 625 gather_stats=`if test $enable_gather_detailed_mem_stats != no; then echo 1; else echo 0; fi`
 626 AC_DEFINE_UNQUOTED(GATHER_STATISTICS, $gather_stats,
 627 [Define to enable detailed memory allocation stats gathering.])
 628
 629 AC_ARG_ENABLE(valgrind-annotations,
 630 [AS_HELP_STRING([--enable-valgrind-annotations],
 631                 [enable valgrind runtime interaction])], [],
 632 [enable_valgrind_annotations=no])
 633 if test x$enable_valgrind_annotations != xno \
 634     || test x$ac_valgrind_checking != x; then
 635   if (test $have_valgrind_h = no \
 636       && test $gcc_cv_header_memcheck_h = no \
 637       && test $gcc_cv_header_valgrind_memcheck_h = no); then
 638     AC_MSG_ERROR([*** Can't find valgrind/memcheck.h, memcheck.h or valgrind.h])
 639   fi
 640   AC_DEFINE(ENABLE_VALGRIND_ANNOTATIONS, 1,
 641 [Define to get calls to the valgrind runtime enabled.])
 642 fi
 643
 644 # -------------------------------
 645 # Miscenalleous configure options
 646 # -------------------------------
 647
 648 # With stabs
 649 AC_ARG_WITH(stabs,
 650 [AS_HELP_STRING([--with-stabs],
 651                 [arrange to use stabs instead of host debug format])],
 652 stabs="$with_stabs",
 653 stabs=no)
 654
 655 # Determine whether or not multilibs are enabled.
 656 AC_ARG_ENABLE(multilib,
 657 [AS_HELP_STRING([--enable-multilib],
 658                 [enable library support for multiple ABIs])],
 659 [], [enable_multilib=yes])
 660 AC_SUBST(enable_multilib)
 661
 662 # Determine whether or not multiarch is enabled.
 663 AC_ARG_ENABLE(multiarch,
 664 [AS_HELP_STRING([--enable-multiarch],
 665                 [enable support for multiarch paths])],
 666 [case "${enableval}" in
 667 yes|no|auto) enable_multiarch=$enableval;;
 668 *) AC_MSG_ERROR(bad value ${enableval} given for --enable-multiarch option) ;;
 669 esac], [enable_multiarch=auto])
 670 if test x${enable_multiarch} = xauto; then
 671   if test x${with_native_system_header_dir} != x; then
 672     ma_msg_suffix=", disabled auto check (configured with --native-system-header-dir)"
 673     enable_multiarch=no
 674   fi
 675   if test x$host != x$target && test "x$with_sysroot" = x; then
 676     ma_msg_suffix=", disabled auto check (cross build configured without --with-sysroot)"
 677     enable_multiarch=no
 678   fi
 679 fi
 680 AC_MSG_CHECKING(for multiarch configuration)
 681 AC_SUBST(enable_multiarch)
 682 AC_MSG_RESULT($enable_multiarch$ma_msg_suffix)
 683
 684 # needed for setting the multiarch name for soft-float/hard-float ABIs
 685 AC_SUBST(with_cpu)
 686 AC_SUBST(with_float)
 687
 688 # Enable __cxa_atexit for C++.
 689 AC_ARG_ENABLE(__cxa_atexit,
 690 [AS_HELP_STRING([--enable-__cxa_atexit], [enable __cxa_atexit for C++])],
 691 [], [])
 692
 693 # Enable C extension for decimal float if target supports it.
 694 GCC_AC_ENABLE_DECIMAL_FLOAT([$target])
 695
 696 dfp=`if test $enable_decimal_float != no; then echo 1; else echo 0; fi`
 697 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_FLOAT, $dfp,
 698 [Define to 1 to enable decimal float extension to C.])
 699
 700 # Use default_decimal_float for dependency.
 701 enable_decimal_float=$default_decimal_float
 702
 703 bid=`if test $enable_decimal_float = bid; then echo 1; else echo 0; fi`
 704 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_BID_FORMAT, $bid,
 705 [Define to 1 to specify that we are using the BID decimal floating
 706 point format instead of DPD])
 707
 708 # Enable C extension for fixed-point arithmetic.
 709 AC_ARG_ENABLE(fixed-point,
 710 [AS_HELP_STRING([--enable-fixed-point],
 711                 [enable fixed-point arithmetic extension to C])],
 712 [],
 713 [
 714   case $target in
 715     arm*)
 716       enable_fixed_point=yes
 717       ;;
 718
 719     mips*-*-*)
 720       enable_fixed_point=yes
 721       ;;
 722     *)
 723       AC_MSG_WARN([fixed-point is not supported for this target, ignored])
 724       enable_fixed_point=no
 725       ;;
 726   esac
 727 ])
 728 AC_SUBST(enable_fixed_point)
 729
 730 fixedpoint=`if test $enable_fixed_point = yes; then echo 1; else echo 0; fi`
 731 AC_DEFINE_UNQUOTED(ENABLE_FIXED_POINT, $fixedpoint,
 732 [Define to 1 to enable fixed-point arithmetic extension to C.])
 733
 734 # Enable threads
 735 # Pass with no value to take the default
 736 # Pass with a value to specify a thread package
 737 AC_ARG_ENABLE(threads,
 738 [AS_HELP_STRING([[--enable-threads[=LIB]]],
 739                 [enable thread usage for target GCC,
 740                  using LIB thread package])],,
 741 [enable_threads=''])
 742
 743 AC_ARG_ENABLE(tls,
 744 [AS_HELP_STRING([--enable-tls],
 745                 [enable or disable generation of tls code
 746                  overriding the assembler check for tls support])],
 747 [
 748   case $enable_tls in
 749     yes | no) ;;
 750     *) AC_MSG_ERROR(['$enable_tls' is an invalid value for --enable-tls.
 751 Valid choices are 'yes' and 'no'.]) ;;
 752   esac
 753 ], [enable_tls=''])
 754
 755 AC_ARG_ENABLE(objc-gc,
 756 [AS_HELP_STRING([--enable-objc-gc],
 757                 [enable the use of Boehm's garbage collector with
 758                  the GNU Objective-C runtime])],
 759 if test x$enable_objc_gc = xno; then
 760         objc_boehm_gc=''
 761 else
 762         objc_boehm_gc=1
 763 fi,
 764 objc_boehm_gc='')
 765
 766 AC_ARG_WITH(dwarf2,
 767 [AS_HELP_STRING([--with-dwarf2], [force the default debug format to be DWARF 2])],
 768 dwarf2="$with_dwarf2",
 769 dwarf2=no)
 770
 771 AC_ARG_ENABLE(shared,
 772 [AS_HELP_STRING([--disable-shared], [don't provide a shared libgcc])],
 773 [
 774   case $enable_shared in
 775   yes | no) ;;
 776   *)
 777     enable_shared=no
 778     IFS="${IFS=         }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
 779     for pkg in $enableval; do
 780       if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
 781         enable_shared=yes
 782       fi
 783     done
 784     IFS="$ac_save_ifs"
 785     ;;
 786   esac
 787 ], [enable_shared=yes])
 788 AC_SUBST(enable_shared)
 789
 790 AC_ARG_WITH([native-system-header-dir],
 791   [  --with-native-system-header-dir=dir
 792                           use dir as the directory to look for standard
 793                           system header files in.  Defaults to /usr/include.],
 794 [
 795  case ${with_native_system_header_dir} in
 796  yes|no) AC_MSG_ERROR([bad value ${withval} given for --with-native-system-header-dir]) ;;
 797  /* | [[A-Za-z]]:[[\\/]]*) ;;
 798  *) AC_MSG_ERROR([--with-native-system-header-dir argument ${withval} must be an absolute directory]) ;;
 799  esac
 800  configured_native_system_header_dir="${withval}"
 801 ], [configured_native_system_header_dir=])
 802
 803 AC_ARG_WITH(build-sysroot,
 804   [AS_HELP_STRING([--with-build-sysroot=sysroot],
 805                   [use sysroot as the system root during the build])],
 806   [if test x"$withval" != x ; then
 807      SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
 808    fi],
 809   [SYSROOT_CFLAGS_FOR_TARGET=])
 810 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
 811
 812 if test "x$prefix" = xNONE; then
 813  test_prefix=/usr/local
 814 else
 815  test_prefix=$prefix
 816 fi
 817 if test "x$exec_prefix" = xNONE; then
 818  test_exec_prefix=$test_prefix
 819 else
 820  test_exec_prefix=$exec_prefix
 821 fi
 822
 823 AC_ARG_WITH(sysroot,
 824 [AS_HELP_STRING([[--with-sysroot[=DIR]]],
 825                 [search for usr/lib, usr/include, et al, within DIR])],
 826 [
 827  case ${with_sysroot} in
 828  yes) TARGET_SYSTEM_ROOT='${exec_prefix}/${target_noncanonical}/sys-root' ;;
 829  *) TARGET_SYSTEM_ROOT=$with_sysroot ;;
 830  esac
 831
 832  TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"$(TARGET_SYSTEM_ROOT)\"'
 833  CROSS_SYSTEM_HEADER_DIR='$(TARGET_SYSTEM_ROOT)$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
 834
 835  case ${TARGET_SYSTEM_ROOT} in
 836  "${test_prefix}"|"${test_prefix}/"*|\
 837  "${test_exec_prefix}"|"${test_exec_prefix}/"*|\
 838  '${prefix}'|'${prefix}/'*|\
 839  '${exec_prefix}'|'${exec_prefix}/'*)
 840    t="$TARGET_SYSTEM_ROOT_DEFINE -DTARGET_SYSTEM_ROOT_RELOCATABLE"
 841    TARGET_SYSTEM_ROOT_DEFINE="$t"
 842    ;;
 843  esac
 844 ], [
 845  TARGET_SYSTEM_ROOT=
 846  TARGET_SYSTEM_ROOT_DEFINE=
 847  CROSS_SYSTEM_HEADER_DIR='$(gcc_tooldir)/sys-include'
 848 ])
 849 AC_SUBST(TARGET_SYSTEM_ROOT)
 850 AC_SUBST(TARGET_SYSTEM_ROOT_DEFINE)
 851 AC_SUBST(CROSS_SYSTEM_HEADER_DIR)
 852
 853 AC_ARG_WITH(specs,
 854   [AS_HELP_STRING([--with-specs=SPECS],
 855                   [add SPECS to driver command-line processing])],
 856   [CONFIGURE_SPECS=$withval],
 857   [CONFIGURE_SPECS=]
 858 )
 859 AC_SUBST(CONFIGURE_SPECS)
 860
 861 ACX_PKGVERSION([GCC])
 862 ACX_BUGURL([http://gcc.gnu.org/bugs.html])
 863
 864 # Sanity check enable_languages in case someone does not run the toplevel
 865 # configure # script.
 866 AC_ARG_ENABLE(languages,
 867 [AS_HELP_STRING([--enable-languages=LIST], [specify which front-ends to build])],
 868 [case ,${enable_languages}, in
 869        ,,|,yes,)
 870                 # go safe -- we cannot be much sure without the toplevel
 871                 # configure's
 872                 # analysis of which target libs are present and usable
 873                 enable_languages=c
 874                 ;;
 875          *,all,*)
 876                 AC_MSG_ERROR([only the toplevel supports --enable-languages=all])
 877                 ;;
 878         *,c,*)
 879                 ;;
 880         *)
 881                 enable_languages=c,${enable_languages}
 882                 ;;
 883 esac],
 884 [enable_languages=c])
 885
 886 AC_ARG_WITH(multilib-list,
 887 [AS_HELP_STRING([--with-multilib-list], [select multilibs (AArch64, SH and x86-64 only)])],
 888 :,
 889 with_multilib_list=default)
 890
 891 # -------------------------
 892 # Checks for other programs
 893 # -------------------------
 894
 895 AC_PROG_MAKE_SET
 896
 897 # Find some useful tools
 898 AC_PROG_AWK
 899 # We need awk to create options.c and options.h.
 900 # Bail out if it's missing.
 901 case ${AWK} in
 902   "") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
 903 esac
 904
 905 gcc_AC_PROG_LN_S
 906 ACX_PROG_LN($LN_S)
 907 AC_PROG_RANLIB
 908 ranlib_flags=""
 909 AC_SUBST(ranlib_flags)
 910
 911 gcc_AC_PROG_INSTALL
 912
 913 # See if cmp has --ignore-initial.
 914 gcc_AC_PROG_CMP_IGNORE_INITIAL
 915
 916 # See if we have the mktemp command.
 917 AC_CHECK_PROG(have_mktemp_command, mktemp, yes, no)
 918
 919 # See if makeinfo has been installed and is modern enough
 920 # that we can use it.
 921 ACX_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
 922   [GNU texinfo.* \([0-9][0-9.]*\)],
 923   [4.[7-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
 924 if test $gcc_cv_prog_makeinfo_modern = no; then
 925   AC_MSG_WARN([
 926 *** Makeinfo is missing or too old.
 927 *** Info documentation will not be built.])
 928   BUILD_INFO=
 929 else
 930   BUILD_INFO=info
 931 fi
 932 AC_SUBST(BUILD_INFO)
 933
 934 # Is pod2man recent enough to regenerate manpages?
 935 AC_MSG_CHECKING([for recent Pod::Man])
 936 if (perl -e 'use 1.10 Pod::Man') >/dev/null 2>&1; then
 937   AC_MSG_RESULT(yes)
 938   GENERATED_MANPAGES=generated-manpages
 939 else
 940   AC_MSG_RESULT(no)
 941   GENERATED_MANPAGES=
 942 fi
 943 AC_SUBST(GENERATED_MANPAGES)
 944
 945 MISSING="${CONFIG_SHELL-/bin/sh} $ac_aux_dir/missing"
 946
 947 # How about lex?
 948 dnl Don't use AC_PROG_LEX; we insist on flex.
 949 dnl LEXLIB is not useful in gcc.
 950 AC_CHECK_PROGS([FLEX], flex, [$MISSING flex])
 951
 952 # Bison?
 953 AC_CHECK_PROGS([BISON], bison, [$MISSING bison])
 954
 955 # Binutils are not build modules, unlike bison/flex/makeinfo.  So we
 956 # check for build == host before using them.
 957
 958 # NM
 959 if test x${build} = x${host} && test -f $srcdir/../binutils/nm.c \
 960   && test -d ../binutils ; then
 961   NM='${objdir}/../binutils/nm-new'
 962 else
 963   AC_CHECK_PROG(NM, nm, nm, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing nm)
 964 fi
 965
 966 # AR
 967 if test x${build} = x${host} && test -f $srcdir/../binutils/ar.c \
 968   && test -d ../binutils ; then
 969   AR='${objdir}/../binutils/ar'
 970 else
 971   AC_CHECK_PROG(AR, ar, ar, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing ar)
 972 fi
 973
 974
 975 # --------------------
 976 # Checks for C headers
 977 # --------------------
 978
 979 # Need to reject headers which give warnings, so that the -Werror bootstrap
 980 # works later. *sigh*  This needs to come before all header checks.
 981 AC_PROG_CPP_WERROR
 982
 983 AC_HEADER_STDC
 984 AC_HEADER_TIME
 985 ACX_HEADER_STRING
 986 AC_HEADER_SYS_WAIT
 987 AC_HEADER_TIOCGWINSZ
 988 AC_CHECK_HEADERS(limits.h stddef.h string.h strings.h stdlib.h time.h iconv.h \
 989                  fcntl.h unistd.h sys/file.h sys/time.h sys/mman.h \
 990                  sys/resource.h sys/param.h sys/times.h sys/stat.h \
 991                  direct.h malloc.h langinfo.h ldfcn.h locale.h wchar.h)
 992
 993 # Check for thread headers.
 994 AC_CHECK_HEADER(thread.h, [have_thread_h=yes], [have_thread_h=])
 995 AC_CHECK_HEADER(pthread.h, [have_pthread_h=yes], [have_pthread_h=])
 996
 997 # These tests can't be done till we know if we have limits.h.
 998 gcc_AC_C_CHAR_BIT
 999 AC_C_BIGENDIAN
1000
1001 # ----------------------
1002 # Checks for C++ headers
1003 # ----------------------
1004
1005 dnl Autoconf will give an error in the configure script if there is no
1006 dnl C++ preprocessor.  Hack to prevent that.
1007 m4_pushdef([AC_MSG_ERROR], m4_defn([AC_MSG_WARN]))[]dnl
1008 AC_PROG_CXXCPP
1009 m4_popdef([AC_MSG_ERROR])[]dnl
1010
1011 AC_LANG_PUSH(C++)
1012
1013 AC_CHECK_HEADERS(unordered_map)
1014 AC_CHECK_HEADERS(tr1/unordered_map)
1015 AC_CHECK_HEADERS(ext/hash_map)
1016
1017 AC_LANG_POP(C++)
1018
1019 # --------
1020 # Dependency checking.
1021 # --------
1022
1023 AC_LANG_PUSH(C++)
1024 ZW_CREATE_DEPDIR
1025 AC_CONFIG_COMMANDS([gccdepdir],[
1026   ${CONFIG_SHELL-/bin/sh} $ac_aux_dir/mkinstalldirs build/$DEPDIR
1027   for lang in $subdirs c-family common
1028   do
1029       ${CONFIG_SHELL-/bin/sh} $ac_aux_dir/mkinstalldirs $lang/$DEPDIR
1030   done], [subdirs="$subdirs" ac_aux_dir=$ac_aux_dir DEPDIR=$DEPDIR])
1031
1032 ZW_PROG_COMPILER_DEPENDENCIES([CXX])
1033 AC_LANG_POP(C++)
1034
1035 # --------
1036 # UNSORTED
1037 # --------
1038
1039
1040 # These libraries may be used by collect2.
1041 # We may need a special search path to get them linked.
1042 AC_CACHE_CHECK(for collect2 libraries, gcc_cv_collect2_libs,
1043 [save_LIBS="$LIBS"
1044 for libs in '' -lld -lmld \
1045                 '-L/usr/lib/cmplrs/cc2.11 -lmld' \
1046                 '-L/usr/lib/cmplrs/cc3.11 -lmld'
1047 do
1048         LIBS="$libs"
1049         AC_TRY_LINK_FUNC(ldopen,
1050                 [gcc_cv_collect2_libs="$libs"; break])
1051 done
1052 LIBS="$save_LIBS"
1053 test -z "$gcc_cv_collect2_libs" && gcc_cv_collect2_libs='none required'])
1054 case $gcc_cv_collect2_libs in
1055         "none required")        ;;
1056         *)      COLLECT2_LIBS=$gcc_cv_collect2_libs ;;
1057 esac
1058 AC_SUBST(COLLECT2_LIBS)
1059
1060 # When building Ada code on Alpha, we need exc_resume which is usually in
1061 # -lexc.  So test for it.
1062 save_LIBS="$LIBS"
1063 LIBS=
1064 AC_SEARCH_LIBS(exc_resume, exc)
1065 GNAT_LIBEXC="$LIBS"
1066 LIBS="$save_LIBS"
1067 AC_SUBST(GNAT_LIBEXC)
1068
1069 # To support -mcpu=native on Solaris/SPARC, we need libkstat.
1070 save_LIBS="$LIBS"
1071 LIBS=
1072 AC_SEARCH_LIBS(kstat_open, kstat)
1073 EXTRA_GCC_LIBS="$LIBS"
1074 LIBS="$save_LIBS"
1075 AC_SUBST(EXTRA_GCC_LIBS)
1076
1077 # Some systems put ldexp and frexp in libm instead of libc; assume
1078 # they're both in the same place.  jcf-dump needs them.
1079 save_LIBS="$LIBS"
1080 LIBS=
1081 AC_SEARCH_LIBS(ldexp, m)
1082 LDEXP_LIB="$LIBS"
1083 LIBS="$save_LIBS"
1084 AC_SUBST(LDEXP_LIB)
1085
1086 # Use <inttypes.h> only if it exists,
1087 # doesn't clash with <sys/types.h>, declares intmax_t and defines
1088 # PRId64
1089 AC_MSG_CHECKING(for inttypes.h)
1090 AC_CACHE_VAL(gcc_cv_header_inttypes_h,
1091 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
1092 [[#define __STDC_FORMAT_MACROS
1093 #include <sys/types.h>
1094 #include <inttypes.h>]],
1095   [[intmax_t i = -1;
1096 #ifndef PRId64
1097 choke me
1098 #endif]])],
1099   [gcc_cv_header_inttypes_h=yes],
1100   [gcc_cv_header_inttypes_h=no])])
1101 AC_MSG_RESULT($gcc_cv_header_inttypes_h)
1102 if test $gcc_cv_header_inttypes_h = yes; then
1103   AC_DEFINE(HAVE_INTTYPES_H, 1,
1104         [Define if you have a working <inttypes.h> header file.])
1105 fi
1106
1107 dnl Disabled until we have a complete test for buggy enum bitfields.
1108 dnl gcc_AC_C_ENUM_BF_UNSIGNED
1109
1110 define(gcc_UNLOCKED_FUNCS, clearerr_unlocked feof_unlocked dnl
1111   ferror_unlocked fflush_unlocked fgetc_unlocked fgets_unlocked dnl
1112   fileno_unlocked fprintf_unlocked fputc_unlocked fputs_unlocked dnl
1113   fread_unlocked fwrite_unlocked getchar_unlocked getc_unlocked dnl
1114   putchar_unlocked putc_unlocked)
1115 AC_CHECK_FUNCS(times clock kill getrlimit setrlimit atoll atoq \
1116         popen sysconf strsignal getrusage nl_langinfo \
1117         gettimeofday mbstowcs wcswidth mmap setlocale \
1118         gcc_UNLOCKED_FUNCS madvise)
1119
1120 if test x$ac_cv_func_mbstowcs = xyes; then
1121   AC_CACHE_CHECK(whether mbstowcs works, gcc_cv_func_mbstowcs_works,
1122 [    AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <stdlib.h>
1123 int main()
1124 {
1125   mbstowcs(0, "", 0);
1126   return 0;
1127 }]])],
1128     [gcc_cv_func_mbstowcs_works=yes],
1129     [gcc_cv_func_mbstowcs_works=no],
1130     [gcc_cv_func_mbstowcs_works=yes])])
1131   if test x$gcc_cv_func_mbstowcs_works = xyes; then
1132     AC_DEFINE(HAVE_WORKING_MBSTOWCS, 1,
1133   [Define this macro if mbstowcs does not crash when its
1134    first argument is NULL.])
1135   fi
1136 fi
1137
1138 AC_CHECK_TYPE(ssize_t, int)
1139 AC_CHECK_TYPE(caddr_t, char *)
1140
1141 GCC_AC_FUNC_MMAP_BLACKLIST
1142
1143 case "${host}" in
1144 *-*-*vms*)
1145   # Under VMS, vfork works very differently than on Unix. The standard test
1146   # won't work, and it isn't easily adaptable. It makes more sense to
1147   # just force it.
1148   ac_cv_func_vfork_works=yes
1149   ;;
1150 esac
1151 AC_FUNC_FORK
1152
1153 # g++ on Solaris 10+ defines _XOPEN_SOURCE=600, which exposes a different
1154 # iconv() prototype.
1155 AC_LANG_PUSH([C++])
1156 AM_ICONV
1157 AC_LANG_POP([C++])
1158
1159 # Until we have in-tree GNU iconv:
1160 LIBICONV_DEP=
1161 AC_SUBST(LIBICONV_DEP)
1162
1163 AM_LC_MESSAGES
1164
1165 AM_LANGINFO_CODESET
1166
1167 # We will need to find libiberty.h and ansidecl.h
1168 saved_CFLAGS="$CFLAGS"
1169 CFLAGS="$CFLAGS -I${srcdir} -I${srcdir}/../include $GMPINC"
1170 saved_CXXFLAGS="$CXXFLAGS"
1171 CXXFLAGS="$CXXFLAGS -I${srcdir} -I${srcdir}/../include $GMPINC"
1172 gcc_AC_CHECK_DECLS(getenv atol asprintf sbrk abort atof getcwd getwd \
1173         stpcpy strnlen strsignal strstr strverscmp \
1174         errno snprintf vsnprintf vasprintf malloc realloc calloc \
1175         free basename getopt clock getpagesize ffs gcc_UNLOCKED_FUNCS, , ,[
1176 #include "ansidecl.h"
1177 #include "system.h"])
1178
1179 gcc_AC_CHECK_DECLS(getrlimit setrlimit getrusage, , ,[
1180 #include "ansidecl.h"
1181 #include "system.h"
1182 #ifdef HAVE_SYS_RESOURCE_H
1183 #include <sys/resource.h>
1184 #endif
1185 ])
1186
1187 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1188 #include "ansidecl.h"
1189 #include "system.h"
1190 #ifdef HAVE_SYS_RESOURCE_H
1191 #include <sys/resource.h>
1192 #endif
1193 ]], [[rlim_t l = 0;]])],[],[AC_DEFINE([rlim_t],[long],
1194 [Define to `long' if <sys/resource.h> doesn't define.])])
1195
1196 # On AIX 5.2, <ldfcn.h> conflicts with <fcntl.h>, as both define incompatible
1197 # FREAD and FWRITE macros.  Fortunately, for GCC's single usage of ldgetname
1198 # in collect2.c, <fcntl.h> isn't visible, but the configure test below needs
1199 # to undef these macros to get the correct value for HAVE_DECL_LDGETNAME.
1200 gcc_AC_CHECK_DECLS(ldgetname, , ,[
1201 #include "ansidecl.h"
1202 #include "system.h"
1203 #ifdef HAVE_LDFCN_H
1204 #undef FREAD
1205 #undef FWRITE
1206 #include <ldfcn.h>
1207 #endif
1208 ])
1209
1210 gcc_AC_CHECK_DECLS(times, , ,[
1211 #include "ansidecl.h"
1212 #include "system.h"
1213 #ifdef HAVE_SYS_TIMES_H
1214 #include <sys/times.h>
1215 #endif
1216 ])
1217
1218 gcc_AC_CHECK_DECLS(sigaltstack, , ,[
1219 #include "ansidecl.h"
1220 #include "system.h"
1221 #include <signal.h>
1222 ])
1223
1224 # g++ on Solaris 10+ defines _XOPEN_SOURCE=600, which hides the madvise()
1225 # prototype.
1226 AC_LANG_PUSH([C++])
1227 gcc_AC_CHECK_DECLS(madvise, , ,[
1228   #include "ansidecl.h"
1229   #include "system.h"
1230 ])
1231 AC_LANG_POP([C++])
1232
1233 # More time-related stuff.
1234 AC_CACHE_CHECK(for struct tms, ac_cv_struct_tms, [
1235 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1236 #include "ansidecl.h"
1237 #include "system.h"
1238 #ifdef HAVE_SYS_TIMES_H
1239 #include <sys/times.h>
1240 #endif
1241 ]], [[struct tms tms;]])],[ac_cv_struct_tms=yes],[ac_cv_struct_tms=no])])
1242 if test $ac_cv_struct_tms = yes; then
1243   AC_DEFINE(HAVE_STRUCT_TMS, 1,
1244   [Define if <sys/times.h> defines struct tms.])
1245 fi
1246
1247 # use gcc_cv_* here because this doesn't match the behavior of AC_CHECK_TYPE.
1248 # revisit after autoconf 2.50.
1249 AC_CACHE_CHECK(for clock_t, gcc_cv_type_clock_t, [
1250 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1251 #include "ansidecl.h"
1252 #include "system.h"
1253 ]], [[clock_t x;]])],[gcc_cv_type_clock_t=yes],[gcc_cv_type_clock_t=no])])
1254 if test $gcc_cv_type_clock_t = yes; then
1255   AC_DEFINE(HAVE_CLOCK_T, 1,
1256   [Define if <time.h> defines clock_t.])
1257 fi
1258
1259 # Check if F_SETLKW is supported by fcntl.
1260 AC_CACHE_CHECK(for F_SETLKW, ac_cv_f_setlkw, [
1261 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1262 #include <fcntl.h>]], [[
1263 struct flock fl;
1264 fl.l_whence = 0;
1265 fl.l_start = 0;
1266 fl.l_len = 0;
1267 fl.l_pid = 0;
1268 return fcntl (1, F_SETLKW, &fl);]])],
1269 [ac_cv_f_setlkw=yes],[ac_cv_f_setlkw=no])])
1270 if test $ac_cv_f_setlkw = yes; then
1271   AC_DEFINE(HOST_HAS_F_SETLKW, 1,
1272   [Define if F_SETLKW supported by fcntl.])
1273 fi
1274
1275 # Restore CFLAGS, CXXFLAGS from before the gcc_AC_NEED_DECLARATIONS tests.
1276 CFLAGS="$saved_CFLAGS"
1277 CXXFLAGS="$saved_CXXFLAGS"
1278
1279 # mkdir takes a single argument on some systems.
1280 gcc_AC_FUNC_MKDIR_TAKES_ONE_ARG
1281
1282 # File extensions
1283 manext='.1'
1284 objext='.o'
1285 AC_SUBST(manext)
1286 AC_SUBST(objext)
1287
1288 # With Setjmp/Longjmp based exception handling.
1289 AC_ARG_ENABLE(sjlj-exceptions,
1290 [AS_HELP_STRING([--enable-sjlj-exceptions],
1291                 [arrange to use setjmp/longjmp exception handling])],
1292 [case $target in
1293   *-*-hpux10*)
1294     if test $enableval != yes; then
1295       AC_MSG_WARN([dwarf2 exceptions not supported, sjlj exceptions forced])
1296       enableval=yes
1297     fi
1298     ;;
1299 esac
1300 force_sjlj_exceptions=yes],
1301 [case $target in
1302   *-*-hpux10*)
1303     force_sjlj_exceptions=yes
1304     enableval=yes
1305     ;;
1306   lm32*-*-*)
1307      force_sjlj_exceptions=yes
1308      enableval=yes
1309      ;;
1310   *)
1311     force_sjlj_exceptions=no
1312     ;;
1313 esac])
1314 if test $force_sjlj_exceptions = yes; then
1315   sjlj=`if test $enableval = yes; then echo 1; else echo 0; fi`
1316   AC_DEFINE_UNQUOTED(CONFIG_SJLJ_EXCEPTIONS, $sjlj,
1317     [Define 0/1 to force the choice for exception handling model.])
1318 fi
1319
1320 # --------------------------------------------------------
1321 # Build, host, and target specific configuration fragments
1322 # --------------------------------------------------------
1323
1324 # Collect build-machine-specific information.
1325 . ${srcdir}/config.build
1326
1327 # Collect host-machine-specific information.
1328 . ${srcdir}/config.host
1329
1330 target_gtfiles=
1331
1332 # Collect target-machine-specific information.
1333 . ${srcdir}/config.gcc
1334
1335 extra_objs="${host_extra_objs} ${extra_objs}"
1336 extra_gcc_objs="${host_extra_gcc_objs} ${extra_gcc_objs}"
1337
1338 # Default the target-machine variables that were not explicitly set.
1339 if test x"$tm_file" = x
1340 then tm_file=$cpu_type/$cpu_type.h; fi
1341
1342 if test x"$extra_headers" = x
1343 then extra_headers=; fi
1344
1345 if test x$md_file = x
1346 then md_file=$cpu_type/$cpu_type.md; fi
1347
1348 if test x$out_file = x
1349 then out_file=$cpu_type/$cpu_type.c; fi
1350
1351 if test x"$tmake_file" = x
1352 then tmake_file=$cpu_type/t-$cpu_type
1353 fi
1354
1355 # Support --enable-initfini-array.
1356 if test x$enable_initfini_array != xno; then
1357   tm_file="${tm_file} initfini-array.h"
1358 fi
1359
1360 if test x"$dwarf2" = xyes
1361 then tm_file="$tm_file tm-dwarf2.h"
1362 fi
1363
1364 # Say what files are being used for the output code and MD file.
1365 echo "Using \`$srcdir/config/$out_file' for machine-specific logic."
1366 echo "Using \`$srcdir/config/$md_file' as machine description file."
1367
1368 # If any of the xm_file variables contain nonexistent files, warn
1369 # about them and drop them.
1370
1371 bx=
1372 for x in $build_xm_file; do
1373   if    test -f $srcdir/config/$x
1374   then      bx="$bx $x"
1375   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1376   fi
1377 done
1378 build_xm_file="$bx"
1379
1380 hx=
1381 for x in $host_xm_file; do
1382   if    test -f $srcdir/config/$x
1383   then      hx="$hx $x"
1384   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1385   fi
1386 done
1387 host_xm_file="$hx"
1388
1389 tx=
1390 for x in $xm_file; do
1391   if    test -f $srcdir/config/$x
1392   then      tx="$tx $x"
1393   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1394   fi
1395 done
1396 xm_file="$tx"
1397
1398 count=a
1399 for f in $tm_file; do
1400         count=${count}x
1401 done
1402 if test $count = ax; then
1403         echo "Using \`$srcdir/config/$tm_file' as target machine macro file."
1404 else
1405         echo "Using the following target machine macro files:"
1406         for f in $tm_file; do
1407                 echo "  $srcdir/config/$f"
1408         done
1409 fi
1410
1411 if test x$use_long_long_for_widest_fast_int = xyes; then
1412         AC_DEFINE(USE_LONG_LONG_FOR_WIDEST_FAST_INT, 1,
1413 [Define to 1 if the 'long long' type is wider than 'long' but still
1414 efficiently supported by the host hardware.])
1415 fi
1416
1417 gnu_ld_bool=`if test x"$gnu_ld" = x"yes"; then echo 1; else echo 0; fi`
1418 AC_DEFINE_UNQUOTED(HAVE_GNU_LD, $gnu_ld_bool, [Define to 1 if using GNU ld.])
1419
1420 gnu_as_bool=`if test x"$gas" = x"yes"; then echo 1; else echo 0; fi`
1421 AC_DEFINE_UNQUOTED(HAVE_GNU_AS, $gnu_as_bool, [Define to 1 if using GNU as.])
1422
1423 count=a
1424 for f in $host_xm_file; do
1425         count=${count}x
1426 done
1427 if test $count = a; then
1428         :
1429 elif test $count = ax; then
1430         echo "Using \`$srcdir/config/$host_xm_file' as host machine macro file."
1431 else
1432         echo "Using the following host machine macro files:"
1433         for f in $host_xm_file; do
1434                 echo "  $srcdir/config/$f"
1435         done
1436 fi
1437 echo "Using ${out_host_hook_obj} for host machine hooks."
1438
1439 if test "$host_xm_file" != "$build_xm_file"; then
1440         count=a
1441         for f in $build_xm_file; do
1442                 count=${count}x
1443         done
1444         if test $count = a; then
1445                 :
1446         elif test $count = ax; then
1447                 echo "Using \`$srcdir/config/$build_xm_file' as build machine macro file."
1448         else
1449                 echo "Using the following build machine macro files:"
1450                 for f in $build_xm_file; do
1451                         echo "  $srcdir/config/$f"
1452                 done
1453         fi
1454 fi
1455
1456 if test -n "$configured_native_system_header_dir"; then
1457   native_system_header_dir=$configured_native_system_header_dir
1458 fi
1459 NATIVE_SYSTEM_HEADER_DIR="$native_system_header_dir"
1460 AC_SUBST(NATIVE_SYSTEM_HEADER_DIR)
1461
1462 case ${host} in
1463   powerpc*-*-darwin*)
1464     AC_CACHE_CHECK([whether mcontext_t fields have underscores],
1465       gcc_cv_mcontext_underscores,
1466       AC_COMPILE_IFELSE([
1467 #include <sys/cdefs.h>
1468 #include <sys/signal.h>
1469 #include <ucontext.h>
1470 int main() { mcontext_t m; if (m->ss.srr0) return 0; return 0; }
1471 ],
1472         gcc_cv_mcontext_underscores=no, gcc_cv_mcontext_underscores=yes))
1473       if test $gcc_cv_mcontext_underscores = yes; then
1474         AC_DEFINE(HAS_MCONTEXT_T_UNDERSCORES,,dnl
1475           [mcontext_t fields start with __])
1476       fi
1477     ;;
1478 esac
1479
1480 # ---------
1481 # Threading
1482 # ---------
1483
1484 # Check if a valid thread package
1485 case ${enable_threads} in
1486   "" | no)
1487     # No threads
1488     target_thread_file='single'
1489     ;;
1490   yes)
1491     # default
1492     target_thread_file='single'
1493     ;;
1494   aix | dce | lynx | mipssde | posix | rtems | \
1495   single | tpf | vxworks | win32)
1496     target_thread_file=${enable_threads}
1497     ;;
1498   *)
1499     echo "${enable_threads} is an unknown thread package" 1>&2
1500     exit 1
1501     ;;
1502 esac
1503
1504 if test x${thread_file} = x; then
1505   # No thread file set by target-specific clauses in config.gcc,
1506   # so use file chosen by default logic above
1507   thread_file=${target_thread_file}
1508 fi
1509
1510 # --------
1511 # UNSORTED
1512 # --------
1513
1514 use_cxa_atexit=no
1515 if test x$enable___cxa_atexit = xyes || \
1516    test x$enable___cxa_atexit = x -a x$default_use_cxa_atexit = xyes; then
1517   if test x$host = x$target; then
1518     case $host in
1519       # mingw32 doesn't have __cxa_atexit but uses atexit registration
1520       # keyed to flag_use_cxa_atexit
1521       *-*-mingw32*)
1522         use_cxa_atexit=yes
1523         ;;
1524       powerpc-ibm-aix*)
1525         use_cxa_atexit=yes
1526         ;;
1527       *)
1528         AC_CHECK_FUNC(__cxa_atexit,[use_cxa_atexit=yes],
1529           [echo "__cxa_atexit can't be enabled on this target"])
1530         ;;
1531     esac
1532   else
1533     # We can't check for __cxa_atexit when building a cross, so assume
1534     # it is available
1535     use_cxa_atexit=yes
1536   fi
1537   if test x$use_cxa_atexit = xyes; then
1538     AC_DEFINE(DEFAULT_USE_CXA_ATEXIT, 2,
1539       [Define if you want to use __cxa_atexit, rather than atexit, to
1540       register C++ destructors for local statics and global objects.
1541       This is essential for fully standards-compliant handling of
1542       destructors, but requires __cxa_atexit in libc.])
1543   fi
1544 fi
1545
1546 # Look for a file containing extra machine modes.
1547 if test -n "$extra_modes" && test -f $srcdir/config/$extra_modes; then
1548   extra_modes_file='$(srcdir)'/config/${extra_modes}
1549   AC_SUBST(extra_modes_file)
1550   AC_DEFINE_UNQUOTED(EXTRA_MODES_FILE, "config/$extra_modes",
1551   [Define to the name of a file containing a list of extra machine modes
1552    for this architecture.])
1553 fi
1554
1555 # Convert extra_options into a form suitable for Makefile use.
1556 extra_opt_files=
1557 all_opt_files=
1558 for f in $extra_options; do
1559   extra_opt_files="$extra_opt_files \$(srcdir)/config/$f"
1560   all_opt_files="$all_opt_files $srcdir/config/$f"
1561 done
1562 AC_SUBST(extra_opt_files)
1563
1564 # auto-host.h is the file containing items generated by autoconf and is
1565 # the first file included by config.h.
1566 # If host=build, it is correct to have bconfig include auto-host.h
1567 # as well.  If host!=build, we are in error and need to do more
1568 # work to find out the build config parameters.
1569 if test x$host = x$build
1570 then
1571         build_auto=auto-host.h
1572 else
1573         # We create a subdir, then run autoconf in the subdir.
1574         # To prevent recursion we set host and build for the new
1575         # invocation of configure to the build for this invocation
1576         # of configure.
1577         tempdir=build.$$
1578         rm -rf $tempdir
1579         mkdir $tempdir
1580         cd $tempdir
1581         case ${srcdir} in
1582         /* | [A-Za-z]:[\\/]* ) realsrcdir=${srcdir};;
1583         *) realsrcdir=../${srcdir};;
1584         esac
1585         # Clearing GMPINC is necessary to prevent host headers being
1586         # used by the build compiler.  Defining GENERATOR_FILE stops
1587         # system.h from including gmp.h.
1588         CC="${CC_FOR_BUILD}" CFLAGS="${CFLAGS_FOR_BUILD}" \
1589         CXX="${CXX_FOR_BUILD}" CXXFLAGS="${CXXFLAGS_FOR_BUILD}" \
1590         LD="${LD_FOR_BUILD}" LDFLAGS="${LDFLAGS_FOR_BUILD}" \
1591         GMPINC="" CPPFLAGS="${CPPFLAGS} -DGENERATOR_FILE" \
1592         ${realsrcdir}/configure \
1593                 --enable-languages=${enable_languages-all} \
1594                 --target=$target_alias --host=$build_alias --build=$build_alias
1595
1596         # We just finished tests for the build machine, so rename
1597         # the file auto-build.h in the gcc directory.
1598         mv auto-host.h ../auto-build.h
1599         cd ..
1600         rm -rf $tempdir
1601         build_auto=auto-build.h
1602 fi
1603 AC_SUBST(build_subdir)
1604
1605 tm_file="${tm_file} defaults.h"
1606 tm_p_file="${tm_p_file} tm-preds.h"
1607 host_xm_file="auto-host.h ansidecl.h ${host_xm_file}"
1608 build_xm_file="${build_auto} ansidecl.h ${build_xm_file}"
1609 # We don't want ansidecl.h in target files, write code there in ISO/GNU C.
1610 # put this back in temporarily.
1611 xm_file="auto-host.h ansidecl.h ${xm_file}"
1612
1613 # --------
1614 # UNSORTED
1615 # --------
1616
1617 changequote(,)dnl
1618 # Compile in configure arguments.
1619 if test -f configargs.h ; then
1620         # Being re-configured.
1621         gcc_config_arguments=`grep configuration_arguments configargs.h | sed -e 's/.*"\([^"]*\)".*/\1/'`
1622         gcc_config_arguments="$gcc_config_arguments : (reconfigured) $TOPLEVEL_CONFIGURE_ARGUMENTS"
1623 else
1624         gcc_config_arguments="$TOPLEVEL_CONFIGURE_ARGUMENTS"
1625 fi
1626
1627 # Double all backslashes and backslash all quotes to turn
1628 # gcc_config_arguments into a C string.
1629 sed -e 's/\\/\\\\/g; s/"/\\"/g' <<EOF >conftest.out
1630 $gcc_config_arguments
1631 EOF
1632 gcc_config_arguments_str=`cat conftest.out`
1633 rm -f conftest.out
1634
1635 cat > configargs.h <<EOF
1636 /* Generated automatically. */
1637 static const char configuration_arguments[] = "$gcc_config_arguments_str";
1638 static const char thread_model[] = "$thread_file";
1639
1640 static const struct {
1641   const char *name, *value;
1642 } configure_default_options[] = $configure_default_options;
1643 EOF
1644 changequote([,])dnl
1645
1646 changequote(,)dnl
1647 gcc_BASEVER=`cat $srcdir/BASE-VER`
1648 gcc_DEVPHASE=`cat $srcdir/DEV-PHASE`
1649 gcc_DATESTAMP=`cat $srcdir/DATESTAMP`
1650 if test -f $srcdir/REVISION ; then
1651         gcc_REVISION=`cat $srcdir/REVISION`
1652 else
1653         gcc_REVISION=""
1654 fi
1655 cat > plugin-version.h <<EOF
1656 #include "configargs.h"
1657
1658 #define GCCPLUGIN_VERSION_MAJOR   `echo $gcc_BASEVER | sed -e 's/^\([0-9]*\).*$/\1/'`
1659 #define GCCPLUGIN_VERSION_MINOR   `echo $gcc_BASEVER | sed -e 's/^[0-9]*\.\([0-9]*\).*$/\1/'`
1660 #define GCCPLUGIN_VERSION_PATCHLEVEL   `echo $gcc_BASEVER | sed -e 's/^[0-9]*\.[0-9]*\.\([0-9]*\)$/\1/'`
1661 #define GCCPLUGIN_VERSION  (GCCPLUGIN_VERSION_MAJOR*1000 + GCCPLUGIN_VERSION_MINOR)
1662
1663 static char basever[] = "$gcc_BASEVER";
1664 static char datestamp[] = "$gcc_DATESTAMP";
1665 static char devphase[] = "$gcc_DEVPHASE";
1666 static char revision[] = "$gcc_REVISION";
1667
1668 /* FIXME plugins: We should make the version information more precise.
1669    One way to do is to add a checksum. */
1670
1671 static struct plugin_gcc_version gcc_version = {basever, datestamp,
1672                                                 devphase, revision,
1673                                                 configuration_arguments};
1674 EOF
1675 changequote([,])dnl
1676
1677 # Internationalization
1678 ZW_GNU_GETTEXT_SISTER_DIR
1679
1680 # If LIBINTL contains LIBICONV, then clear LIBICONV so we don't get
1681 # -liconv on the link line twice.
1682 case "$LIBINTL" in *$LIBICONV*)
1683         LIBICONV= ;;
1684 esac
1685
1686 AC_ARG_ENABLE(secureplt,
1687 [AS_HELP_STRING([--enable-secureplt],
1688                 [enable -msecure-plt by default for PowerPC])],
1689 [], [])
1690
1691 AC_ARG_ENABLE(leading-mingw64-underscores,
1692   AS_HELP_STRING([--enable-leading-mingw64-underscores],
1693                  [enable leading underscores on 64 bit mingw targets]),
1694   [],[])
1695 AS_IF([ test x"$enable_leading_mingw64_underscores" = xyes ],
1696   [AC_DEFINE(USE_MINGW64_LEADING_UNDERSCORES, 1,
1697     [Define if we should use leading underscore on 64 bit mingw targets])])
1698
1699 AC_ARG_ENABLE(cld,
1700 [AS_HELP_STRING([--enable-cld], [enable -mcld by default for 32bit x86])], [],
1701 [enable_cld=no])
1702
1703 AC_ARG_ENABLE(frame-pointer,
1704 [AS_HELP_STRING([--enable-frame-pointer],
1705                 [enable -fno-omit-frame-pointer by default for 32bit x86])], [],
1706 [
1707 case $target_os in
1708 linux* | darwin[[8912]]*)
1709   # Enable -fomit-frame-pointer by default for Linux and Darwin with
1710   # DWARF2.
1711   enable_frame_pointer=no
1712   ;;
1713 *)
1714   enable_frame_pointer=yes
1715   ;;
1716 esac
1717 ])
1718
1719 # Windows32 Registry support for specifying GCC installation paths.
1720 AC_ARG_ENABLE(win32-registry,
1721 [AS_HELP_STRING([--disable-win32-registry],
1722                 [disable lookup of installation paths in the
1723                  Registry on Windows hosts])
1724 AS_HELP_STRING([--enable-win32-registry], [enable registry lookup (default)])
1725 AS_HELP_STRING([--enable-win32-registry=KEY],
1726                [use KEY instead of GCC version as the last portion
1727                 of the registry key])],,)
1728
1729 case $host_os in
1730   win32 | pe | cygwin* | mingw32* | uwin*)
1731     if test "x$enable_win32_registry" != xno; then
1732       AC_SEARCH_LIBS(RegOpenKeyExA, advapi32,, [enable_win32_registry=no])
1733     fi
1734
1735     if test "x$enable_win32_registry" != xno; then
1736       AC_DEFINE(ENABLE_WIN32_REGISTRY, 1,
1737   [Define to 1 if installation paths should be looked up in the Windows
1738    Registry. Ignored on non-Windows hosts.])
1739
1740       if test "x$enable_win32_registry" != xyes \
1741          && test "x$enable_win32_registry" != x; then
1742         AC_DEFINE_UNQUOTED(WIN32_REGISTRY_KEY, "$enable_win32_registry",
1743   [Define to be the last component of the Windows registry key under which
1744    to look for installation paths.  The full key used will be
1745    HKEY_LOCAL_MACHINE/SOFTWARE/Free Software Foundation/{WIN32_REGISTRY_KEY}.
1746    The default is the GCC version number.])
1747       fi
1748     fi
1749   ;;
1750 esac
1751
1752 # Get an absolute path to the GCC top-level source directory
1753 holddir=`${PWDCMD-pwd}`
1754 cd $srcdir
1755 topdir=`${PWDCMD-pwd}`
1756 cd $holddir
1757
1758 # Conditionalize the makefile for this host machine.
1759 xmake_file=
1760 for f in ${host_xmake_file}
1761 do
1762         if test -f ${srcdir}/config/$f
1763         then
1764                 xmake_file="${xmake_file} \$(srcdir)/config/$f"
1765         fi
1766 done
1767
1768 # Conditionalize the makefile for this target machine.
1769 tmake_file_=
1770 for f in ${tmake_file}
1771 do
1772         if test -f ${srcdir}/config/$f
1773         then
1774                 tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
1775         fi
1776 done
1777 tmake_file="${tmake_file_}"
1778
1779 out_object_file=`basename $out_file .c`.o
1780 common_out_object_file=`basename $common_out_file .c`.o
1781
1782 tm_file_list="options.h"
1783 tm_include_list="options.h insn-constants.h"
1784 for f in $tm_file; do
1785   case $f in
1786     ./* )
1787        f=`echo $f | sed 's/^..//'`
1788        tm_file_list="${tm_file_list} $f"
1789        tm_include_list="${tm_include_list} $f"
1790        ;;
1791     defaults.h )
1792        tm_file_list="${tm_file_list} \$(srcdir)/$f"
1793        tm_include_list="${tm_include_list} $f"
1794        ;;
1795     * )
1796        tm_file_list="${tm_file_list} \$(srcdir)/config/$f"
1797        tm_include_list="${tm_include_list} config/$f"
1798        ;;
1799   esac
1800 done
1801
1802 tm_p_file_list=
1803 tm_p_include_list=
1804 for f in $tm_p_file; do
1805   case $f in
1806     tm-preds.h )
1807        tm_p_file_list="${tm_p_file_list} $f"
1808        tm_p_include_list="${tm_p_include_list} $f"
1809        ;;
1810     * )
1811        tm_p_file_list="${tm_p_file_list} \$(srcdir)/config/$f"
1812        tm_p_include_list="${tm_p_include_list} config/$f"
1813   esac
1814 done
1815
1816 xm_file_list=
1817 xm_include_list=
1818 for f in $xm_file; do
1819   case $f in
1820     ansidecl.h )
1821        xm_file_list="${xm_file_list} \$(srcdir)/../include/$f"
1822        xm_include_list="${xm_include_list} $f"
1823        ;;
1824     auto-host.h )
1825        xm_file_list="${xm_file_list} $f"
1826        xm_include_list="${xm_include_list} $f"
1827        ;;
1828     * )
1829        xm_file_list="${xm_file_list} \$(srcdir)/config/$f"
1830        xm_include_list="${xm_include_list} config/$f"
1831        ;;
1832   esac
1833 done
1834
1835 host_xm_file_list=
1836 host_xm_include_list=
1837 for f in $host_xm_file; do
1838   case $f in
1839     ansidecl.h )
1840        host_xm_file_list="${host_xm_file_list} \$(srcdir)/../include/$f"
1841        host_xm_include_list="${host_xm_include_list} $f"
1842        ;;
1843     auto-host.h )
1844        host_xm_file_list="${host_xm_file_list} $f"
1845        host_xm_include_list="${host_xm_include_list} $f"
1846        ;;
1847     * )
1848        host_xm_file_list="${host_xm_file_list} \$(srcdir)/config/$f"
1849        host_xm_include_list="${host_xm_include_list} config/$f"
1850        ;;
1851   esac
1852 done
1853
1854 build_xm_file_list=
1855 for f in $build_xm_file; do
1856   case $f in
1857     ansidecl.h )
1858        build_xm_file_list="${build_xm_file_list} \$(srcdir)/../include/$f"
1859        build_xm_include_list="${build_xm_include_list} $f"
1860        ;;
1861     auto-build.h | auto-host.h )
1862        build_xm_file_list="${build_xm_file_list} $f"
1863        build_xm_include_list="${build_xm_include_list} $f"
1864        ;;
1865     * )
1866        build_xm_file_list="${build_xm_file_list} \$(srcdir)/config/$f"
1867        build_xm_include_list="${build_xm_include_list} config/$f"
1868        ;;
1869   esac
1870 done
1871
1872 # Define macro CROSS_DIRECTORY_STRUCTURE in compilation if this is a
1873 # cross-compiler which does not use the native headers and libraries.
1874 # Also use all.cross instead of all.internal and adjust SYSTEM_HEADER_DIR.
1875 CROSS=                                          AC_SUBST(CROSS)
1876 ALL=all.internal                                AC_SUBST(ALL)
1877 SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)' AC_SUBST(SYSTEM_HEADER_DIR)
1878
1879 if test "x$with_build_sysroot" != x; then
1880   build_system_header_dir=$with_build_sysroot'$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
1881 else
1882   # This value is used, even on a native system, because
1883   # CROSS_SYSTEM_HEADER_DIR is just
1884   # $(TARGET_SYSTEM_ROOT)$(NATIVE_SYSTEM_HEADER_DIR).
1885   build_system_header_dir='$(CROSS_SYSTEM_HEADER_DIR)'
1886 fi
1887
1888 if test x$host != x$target
1889 then
1890         CROSS="-DCROSS_DIRECTORY_STRUCTURE"
1891         ALL=all.cross
1892         SYSTEM_HEADER_DIR=$build_system_header_dir
1893         case "$host","$target" in
1894         # Darwin crosses can use the host system's libraries and headers,
1895         # because of the fat library support.  Of course, it must be the
1896         # same version of Darwin on both sides.  Allow the user to
1897         # just say --target=foo-darwin without a version number to mean
1898         # "the version on this system".
1899             *-*-darwin*,*-*-darwin*)
1900                 hostos=`echo $host | sed 's/.*-darwin/darwin/'`
1901                 targetos=`echo $target | sed 's/.*-darwin/darwin/'`
1902                 if test $hostos = $targetos -o $targetos = darwin ; then
1903                     CROSS=
1904                     SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)'
1905                     with_headers=yes
1906                 fi
1907                 ;;
1908
1909             i?86-*-*,x86_64-*-* \
1910             | powerpc*-*-*,powerpc64*-*-*)
1911                 CROSS="$CROSS -DNATIVE_CROSS" ;;
1912         esac
1913
1914         case $target in
1915                 *-*-mingw*)
1916                         if test "x$with_headers" = x; then
1917                                 with_headers=yes
1918                         fi
1919                         ;;
1920                 *)
1921                         ;;
1922         esac
1923 elif test "x$TARGET_SYSTEM_ROOT" != x; then
1924         SYSTEM_HEADER_DIR=$build_system_header_dir
1925 fi
1926
1927 if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x; then
1928   if test "x$with_headers" != x; then
1929     target_header_dir=$with_headers
1930   elif test "x$with_sysroot" = x; then
1931     target_header_dir="${test_exec_prefix}/${target_noncanonical}/sys-include"
1932   elif test "x$with_build_sysroot" != "x"; then
1933     target_header_dir="${with_build_sysroot}${native_system_header_dir}"
1934   elif test "x$with_sysroot" = xyes; then
1935     target_header_dir="${test_exec_prefix}/${target_noncanonical}/sys-root${native_system_header_dir}"
1936   else
1937     target_header_dir="${with_sysroot}${native_system_header_dir}"
1938   fi
1939 else
1940   target_header_dir=${native_system_header_dir}
1941 fi
1942
1943 # If this is a cross-compiler that does not
1944 # have its own set of headers then define
1945 # inhibit_libc
1946
1947 # If this is using newlib, without having the headers available now,
1948 # then define inhibit_libc in LIBGCC2_CFLAGS.
1949 # This prevents libgcc2 from containing any code which requires libc
1950 # support.
1951 : ${inhibit_libc=false}
1952 if { { test x$host != x$target && test "x$with_sysroot" = x ; } ||
1953        test x$with_newlib = xyes ; } &&
1954      { test "x$with_headers" = xno || test ! -f "$target_header_dir/stdio.h"; } ; then
1955        inhibit_libc=true
1956 fi
1957 AC_SUBST(inhibit_libc)
1958
1959 # When building gcc with a cross-compiler, we need to adjust things so
1960 # that the generator programs are still built with the native compiler.
1961 # Also, we cannot run fixincludes.
1962
1963 # These are the normal (build=host) settings:
1964 CC_FOR_BUILD='$(CC)'            AC_SUBST(CC_FOR_BUILD)
1965 CXX_FOR_BUILD='$(CXX)'          AC_SUBST(CXX_FOR_BUILD)
1966 BUILD_CFLAGS='$(ALL_CFLAGS)'    AC_SUBST(BUILD_CFLAGS)
1967 BUILD_CXXFLAGS='$(ALL_CXXFLAGS)' AC_SUBST(BUILD_CXXFLAGS)
1968 BUILD_LDFLAGS='$(LDFLAGS)'      AC_SUBST(BUILD_LDFLAGS)
1969 STMP_FIXINC=stmp-fixinc         AC_SUBST(STMP_FIXINC)
1970
1971 # And these apply if build != host, or we are generating coverage data
1972 if test x$build != x$host || test "x$coverage_flags" != x
1973 then
1974     BUILD_CFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS_FOR_BUILD)'
1975     BUILD_CXXFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CXXFLAGS_FOR_BUILD)'
1976     BUILD_LDFLAGS='$(LDFLAGS_FOR_BUILD)'
1977 fi
1978
1979 # Expand extra_headers to include complete path.
1980 # This substitutes for lots of t-* files.
1981 extra_headers_list=
1982 # Prepend $(srcdir)/config/${cpu_type}/ to every entry in extra_headers.
1983 for file in ${extra_headers} ; do
1984   extra_headers_list="${extra_headers_list} \$(srcdir)/config/${cpu_type}/${file}"
1985 done
1986
1987 # If use_gcc_tgmath is set, append ginclude/tgmath.h.
1988 if test x"$use_gcc_tgmath" = xyes
1989 then extra_headers_list="${extra_headers_list} \$(srcdir)/ginclude/tgmath.h"
1990 fi
1991
1992 # Define collect2 in Makefile.
1993 case $host_can_use_collect2 in
1994   no) collect2= ;;
1995   *) collect2='collect2$(exeext)' ;;
1996 esac
1997 AC_SUBST([collect2])
1998
1999 # Add a definition of USE_COLLECT2 if system wants one.
2000 case $use_collect2 in
2001   no) use_collect2= ;;
2002   "") ;;
2003   *)
2004     host_xm_defines="${host_xm_defines} USE_COLLECT2"
2005     xm_defines="${xm_defines} USE_COLLECT2"
2006     case $host_can_use_collect2 in
2007       no)
2008         AC_MSG_ERROR([collect2 is required but cannot be built on this system])
2009         ;;
2010     esac
2011     ;;
2012 esac
2013
2014 AC_DEFINE_UNQUOTED(LTOPLUGINSONAME,"${host_lto_plugin_soname}",
2015 [Define to the name of the LTO plugin DSO that must be
2016   passed to the linker's -plugin=LIB option.])
2017
2018 # ---------------------------
2019 # Assembler & linker features
2020 # ---------------------------
2021
2022 # During stage 2, ld is actually gcc/collect-ld, which is a small script to
2023 # discern between when to use prev-ld/ld-new and when to use ld/ld-new.
2024 # However when ld-new is first executed from the build tree, libtool will
2025 # relink it as .libs/lt-ld-new, so that it can give it an RPATH that refers
2026 # to the build tree.  While doing this we need to use the previous-stage
2027 # linker, or we have an infinite loop.  The presence of a shell script as
2028 # ld/ld-new, and the fact that the script *uses ld itself*, is what confuses
2029 # the gcc/collect-ld script.  So we need to know how libtool works, or
2030 # exec-tool will fail.
2031
2032 m4_defun([_LT_CONFIG_COMMANDS], [])
2033 AC_PROG_LIBTOOL
2034 AC_SUBST(objdir)
2035 AC_SUBST(enable_fast_install)
2036
2037 # Identify the assembler which will work hand-in-glove with the newly
2038 # built GCC, so that we can examine its features.  This is the assembler
2039 # which will be driven by the driver program.
2040 #
2041 # If build != host, and we aren't building gas in-tree, we identify a
2042 # build->target assembler and hope that it will have the same features
2043 # as the host->target assembler we'll be using.
2044 gcc_cv_gas_major_version=
2045 gcc_cv_gas_minor_version=
2046 gcc_cv_as_gas_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gas
2047
2048 m4_pattern_allow([AS_FOR_TARGET])dnl
2049 AS_VAR_SET_IF(gcc_cv_as,, [
2050 if test -x "$DEFAULT_ASSEMBLER"; then
2051         gcc_cv_as="$DEFAULT_ASSEMBLER"
2052 elif test -f $gcc_cv_as_gas_srcdir/configure.in \
2053      && test -f ../gas/Makefile \
2054      && test x$build = x$host; then
2055         gcc_cv_as=../gas/as-new$build_exeext
2056 elif test -x as$build_exeext; then
2057         # Build using assembler in the current directory.
2058         gcc_cv_as=./as$build_exeext
2059 elif ( set dummy $AS_FOR_TARGET; test -x $[2] ); then
2060         gcc_cv_as="$AS_FOR_TARGET"
2061 else
2062         AC_PATH_PROG(gcc_cv_as, $AS_FOR_TARGET)
2063 fi])
2064
2065 ORIGINAL_AS_FOR_TARGET=$gcc_cv_as
2066 AC_SUBST(ORIGINAL_AS_FOR_TARGET)
2067 case "$ORIGINAL_AS_FOR_TARGET" in
2068   ./as | ./as$build_exeext) ;;
2069   *) AC_CONFIG_FILES(as:exec-tool.in, [chmod +x as]) ;;
2070 esac
2071
2072 AC_MSG_CHECKING(what assembler to use)
2073 if test "$gcc_cv_as" = ../gas/as-new$build_exeext; then
2074   # Single tree build which includes gas.  We want to prefer it
2075   # over whatever linker top-level may have detected, since
2076   # we'll use what we're building after installation anyway.
2077   AC_MSG_RESULT(newly built gas)
2078   in_tree_gas=yes
2079   _gcc_COMPUTE_GAS_VERSION
2080   in_tree_gas_is_elf=no
2081   if grep 'obj_format = elf' ../gas/Makefile > /dev/null \
2082      || (grep 'obj_format = multi' ../gas/Makefile \
2083          && grep 'extra_objects =.* obj-elf' ../gas/Makefile) > /dev/null
2084   then
2085     in_tree_gas_is_elf=yes
2086   fi
2087 else
2088   AC_MSG_RESULT($gcc_cv_as)
2089   in_tree_gas=no
2090 fi
2091
2092 default_ld=
2093 AC_ARG_ENABLE(ld,
2094 [[  --enable-ld[=ARG]       build ld [ARG={default,yes,no}]]],
2095 [case "${enableval}" in
2096  no)
2097    default_ld=ld.gold
2098    ;;
2099  esac])
2100
2101 install_gold_as_default=no
2102 AC_ARG_ENABLE(gold,
2103 [[  --enable-gold[=ARG]     build gold [ARG={default,yes,no}]]],
2104 [case "${enableval}" in
2105  default)
2106    install_gold_as_default=yes
2107    ;;
2108  yes)
2109    if test x${default_ld} != x; then
2110      install_gold_as_default=yes
2111    fi
2112    ;;
2113  no)
2114    ;;
2115  *)
2116    AC_MSG_ERROR([invalid --enable-gold argument])
2117    ;;
2118  esac])
2119
2120 # Identify the linker which will work hand-in-glove with the newly
2121 # built GCC, so that we can examine its features.  This is the linker
2122 # which will be driven by the driver program.
2123 #
2124 # If build != host, and we aren't building gas in-tree, we identify a
2125 # build->target linker and hope that it will have the same features
2126 # as the host->target linker we'll be using.
2127 gcc_cv_gld_major_version=
2128 gcc_cv_gld_minor_version=
2129 gcc_cv_ld_gld_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/ld
2130 gcc_cv_ld_gold_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gold
2131 gcc_cv_ld_bfd_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/bfd
2132
2133 AS_VAR_SET_IF(gcc_cv_ld,, [
2134 if test -x "$DEFAULT_LINKER"; then
2135         gcc_cv_ld="$DEFAULT_LINKER"
2136 elif test $install_gold_as_default = yes \
2137      && test -f $gcc_cv_ld_gold_srcdir/configure.ac \
2138      && test -f ../gold/Makefile \
2139      && test x$build = x$host; then
2140         gcc_cv_ld=../gold/ld-new$build_exeext
2141 elif test -f $gcc_cv_ld_gld_srcdir/configure.in \
2142      && test -f ../ld/Makefile \
2143      && test x$build = x$host; then
2144         gcc_cv_ld=../ld/ld-new$build_exeext
2145 elif test -x collect-ld$build_exeext; then
2146         # Build using linker in the current directory.
2147         gcc_cv_ld=./collect-ld$build_exeext
2148 elif ( set dummy $LD_FOR_TARGET; test -x $[2] ); then
2149         gcc_cv_ld="$LD_FOR_TARGET"
2150 else
2151         AC_PATH_PROG(gcc_cv_ld, $LD_FOR_TARGET)
2152 fi])
2153
2154 ORIGINAL_PLUGIN_LD_FOR_TARGET=$gcc_cv_ld
2155 PLUGIN_LD_SUFFIX=`basename $gcc_cv_ld | sed -e "s,$target_alias-,,"`
2156 # if the PLUGIN_LD is set ld-new, just have it as ld
2157 # as that is the installed named.
2158 if test x$PLUGIN_LD_SUFFIX = xld-new \
2159    || test x$PLUGIN_LD_SUFFIX = xcollect-ld ; then
2160   PLUGIN_LD_SUFFIX=ld
2161 fi
2162 AC_ARG_WITH(plugin-ld,
2163 [AS_HELP_STRING([[--with-plugin-ld=[ARG]]], [specify the plugin linker])],
2164 [if test x"$withval" != x; then
2165    ORIGINAL_PLUGIN_LD_FOR_TARGET="$withval"
2166    PLUGIN_LD_SUFFIX=`echo $withval | sed -e "s,$target_alias-,,"`
2167  fi])
2168 AC_SUBST(ORIGINAL_PLUGIN_LD_FOR_TARGET)
2169 AC_DEFINE_UNQUOTED(PLUGIN_LD_SUFFIX, "$PLUGIN_LD_SUFFIX", [Specify plugin linker])
2170
2171 # Check to see if we are using gold instead of ld
2172 AC_MSG_CHECKING(whether we are using gold)
2173 ld_is_gold=no
2174 if test x$gcc_cv_ld != x; then
2175   if $gcc_cv_ld --version 2>/dev/null | sed 1q \
2176      | grep "GNU gold" > /dev/null; then
2177     ld_is_gold=yes
2178   fi
2179 fi
2180 AC_MSG_RESULT($ld_is_gold)
2181
2182 ORIGINAL_LD_FOR_TARGET=$gcc_cv_ld
2183 AC_SUBST(ORIGINAL_LD_FOR_TARGET)
2184 case "$ORIGINAL_LD_FOR_TARGET" in
2185   ./collect-ld | ./collect-ld$build_exeext) ;;
2186   *) AC_CONFIG_FILES(collect-ld:exec-tool.in, [chmod +x collect-ld]) ;;
2187 esac
2188
2189 AC_MSG_CHECKING(what linker to use)
2190 if test "$gcc_cv_ld" = ../ld/ld-new$build_exeext \
2191    || test "$gcc_cv_ld" = ../gold/ld-new$build_exeext; then
2192         # Single tree build which includes ld.  We want to prefer it
2193         # over whatever linker top-level may have detected, since
2194         # we'll use what we're building after installation anyway.
2195         AC_MSG_RESULT(newly built ld)
2196         in_tree_ld=yes
2197         in_tree_ld_is_elf=no
2198         if (grep 'EMUL = .*elf' ../ld/Makefile \
2199             || grep 'EMUL = .*linux' ../ld/Makefile \
2200             || grep 'EMUL = .*lynx' ../ld/Makefile) > /dev/null; then
2201           in_tree_ld_is_elf=yes
2202         elif test "$ld_is_gold" = yes; then
2203           in_tree_ld_is_elf=yes
2204         fi
2205         for f in $gcc_cv_ld_bfd_srcdir/configure $gcc_cv_ld_gld_srcdir/configure $gcc_cv_ld_gld_srcdir/configure.in $gcc_cv_ld_gld_srcdir/Makefile.in
2206         do
2207 changequote(,)dnl
2208                 gcc_cv_gld_version=`sed -n -e 's/^[     ]*VERSION=[^0-9A-Za-z_]*\([0-9]*\.[0-9]*.*\)/VERSION=\1/p' < $f`
2209                 if test x$gcc_cv_gld_version != x; then
2210                         break
2211                 fi
2212         done
2213         case $gcc_cv_gld_version in
2214           VERSION=[0-9]*) ;;
2215 changequote([,])dnl
2216           *) AC_MSG_ERROR([[cannot find version of in-tree linker]]) ;;
2217 changequote(,)dnl
2218         esac
2219         gcc_cv_gld_major_version=`expr "$gcc_cv_gld_version" : "VERSION=\([0-9]*\)"`
2220         gcc_cv_gld_minor_version=`expr "$gcc_cv_gld_version" : "VERSION=[0-9]*\.\([0-9]*\)"`
2221 changequote([,])dnl
2222         ORIGINAL_LD_BFD_FOR_TARGET=../ld/ld-new$build_exeext
2223         ORIGINAL_LD_GOLD_FOR_TARGET=../gold/ld-new$build_exeext
2224 else
2225         AC_MSG_RESULT($gcc_cv_ld)
2226         in_tree_ld=no
2227         gcc_cvs_ld_program=`dirname $gcc_cv_ld`/`basename $gcc_cv_ld $host_exeext`
2228         ORIGINAL_LD_BFD_FOR_TARGET=${gcc_cvs_ld_program}.bfd$host_exeext
2229         ORIGINAL_LD_GOLD_FOR_TARGET=${gcc_cvs_ld_program}.gold$host_exeext
2230 fi
2231
2232 AC_SUBST(ORIGINAL_LD_BFD_FOR_TARGET)
2233 AC_SUBST(ORIGINAL_LD_GOLD_FOR_TARGET)
2234
2235 # Figure out what nm we will be using.
2236 gcc_cv_binutils_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/binutils
2237 AS_VAR_SET_IF(gcc_cv_nm,, [
2238 if test -f $gcc_cv_binutils_srcdir/configure.in \
2239      && test -f ../binutils/Makefile \
2240      && test x$build = x$host; then
2241         gcc_cv_nm=../binutils/nm-new$build_exeext
2242 elif test -x nm$build_exeext; then
2243         gcc_cv_nm=./nm$build_exeext
2244 elif ( set dummy $NM_FOR_TARGET; test -x $[2] ); then
2245         gcc_cv_nm="$NM_FOR_TARGET"
2246 else
2247         AC_PATH_PROG(gcc_cv_nm, $NM_FOR_TARGET)
2248 fi])
2249
2250 AC_MSG_CHECKING(what nm to use)
2251 if test "$gcc_cv_nm" = ../binutils/nm-new$build_exeext; then
2252         # Single tree build which includes binutils.
2253         AC_MSG_RESULT(newly built nm)
2254         in_tree_nm=yes
2255 else
2256         AC_MSG_RESULT($gcc_cv_nm)
2257         in_tree_nm=no
2258 fi
2259
2260 ORIGINAL_NM_FOR_TARGET=$gcc_cv_nm
2261 AC_SUBST(ORIGINAL_NM_FOR_TARGET)
2262 case "$ORIGINAL_NM_FOR_TARGET" in
2263   ./nm | ./nm$build_exeext) ;;
2264   *) AC_CONFIG_FILES(nm:exec-tool.in, [chmod +x nm]) ;;
2265 esac
2266
2267
2268 # Figure out what objdump we will be using.
2269 AS_VAR_SET_IF(gcc_cv_objdump,, [
2270 if test -f $gcc_cv_binutils_srcdir/configure.in \
2271      && test -f ../binutils/Makefile \
2272      && test x$build = x$host; then
2273         # Single tree build which includes binutils.
2274         gcc_cv_objdump=../binutils/objdump$build_exeext
2275 elif test -x objdump$build_exeext; then
2276         gcc_cv_objdump=./objdump$build_exeext
2277 elif ( set dummy $OBJDUMP_FOR_TARGET; test -x $[2] ); then
2278         gcc_cv_objdump="$OBJDUMP_FOR_TARGET"
2279 else
2280         AC_PATH_PROG(gcc_cv_objdump, $OBJDUMP_FOR_TARGET)
2281 fi])
2282
2283 AC_MSG_CHECKING(what objdump to use)
2284 if test "$gcc_cv_objdump" = ../binutils/objdump$build_exeext; then
2285         # Single tree build which includes binutils.
2286         AC_MSG_RESULT(newly built objdump)
2287 elif test x$gcc_cv_objdump = x; then
2288         AC_MSG_RESULT(not found)
2289 else
2290         AC_MSG_RESULT($gcc_cv_objdump)
2291 fi
2292
2293 # Figure out what readelf we will be using.
2294 AS_VAR_SET_IF(gcc_cv_readelf,, [
2295 if test -f $gcc_cv_binutils_srcdir/configure.in \
2296      && test -f ../binutils/Makefile \
2297      && test x$build = x$host; then
2298         # Single tree build which includes binutils.
2299         gcc_cv_readelf=../binutils/readelf$build_exeext
2300 elif test -x readelf$build_exeext; then
2301         gcc_cv_readelf=./readelf$build_exeext
2302 else
2303         AC_PATH_PROG(gcc_cv_readelf, readelf)
2304 fi])
2305
2306 AC_MSG_CHECKING(what readelf to use)
2307 if test "$gcc_cv_readelf" = ../binutils/readelf$build_exeext; then
2308         # Single tree build which includes binutils.
2309         AC_MSG_RESULT(newly built readelf)
2310 elif test x$gcc_cv_readelf = x; then
2311         AC_MSG_RESULT(not found)
2312 else
2313         AC_MSG_RESULT($gcc_cv_readelf)
2314 fi
2315
2316 # Figure out what assembler alignment features are present.
2317 gcc_GAS_CHECK_FEATURE([.balign and .p2align], gcc_cv_as_balign_and_p2align,
2318  [2,6,0],,
2319 [.balign 4
2320 .p2align 2],,
2321 [AC_DEFINE(HAVE_GAS_BALIGN_AND_P2ALIGN, 1,
2322   [Define if your assembler supports .balign and .p2align.])])
2323
2324 gcc_GAS_CHECK_FEATURE([.p2align with maximum skip], gcc_cv_as_max_skip_p2align,
2325  [2,8,0],,
2326  [.p2align 4,,7],,
2327 [AC_DEFINE(HAVE_GAS_MAX_SKIP_P2ALIGN, 1,
2328   [Define if your assembler supports specifying the maximum number
2329    of bytes to skip when using the GAS .p2align command.])])
2330
2331 gcc_GAS_CHECK_FEATURE([.literal16], gcc_cv_as_literal16,
2332  [2,8,0],,
2333  [.literal16],,
2334 [AC_DEFINE(HAVE_GAS_LITERAL16, 1,
2335   [Define if your assembler supports .literal16.])])
2336
2337 gcc_GAS_CHECK_FEATURE([working .subsection -1], gcc_cv_as_subsection_m1,
2338  [elf,2,9,0],,
2339  [conftest_label1: .word 0
2340 .subsection -1
2341 conftest_label2: .word 0
2342 .previous],
2343  [if test x$gcc_cv_nm != x; then
2344     $gcc_cv_nm conftest.o | grep conftest_label1 > conftest.nm1
2345     $gcc_cv_nm conftest.o | grep conftest_label2 | sed -e 's/label2/label1/' > conftest.nm2
2346     if cmp conftest.nm1 conftest.nm2 > /dev/null 2>&1
2347     then :
2348     else gcc_cv_as_subsection_m1=yes
2349     fi
2350     rm -f conftest.nm1 conftest.nm2
2351   fi],
2352  [AC_DEFINE(HAVE_GAS_SUBSECTION_ORDERING, 1,
2353   [Define if your assembler supports .subsection and .subsection -1 starts
2354    emitting at the beginning of your section.])])
2355
2356 gcc_GAS_CHECK_FEATURE([.weak], gcc_cv_as_weak,
2357  [2,2,0],,
2358  [      .weak foobar],,
2359 [AC_DEFINE(HAVE_GAS_WEAK, 1, [Define if your assembler supports .weak.])])
2360
2361 gcc_GAS_CHECK_FEATURE([.weakref], gcc_cv_as_weakref,
2362  [2,17,0],,
2363  [      .weakref foobar, barfnot],,
2364 [AC_DEFINE(HAVE_GAS_WEAKREF, 1, [Define if your assembler supports .weakref.])])
2365
2366 gcc_GAS_CHECK_FEATURE([.nsubspa comdat], gcc_cv_as_nsubspa_comdat,
2367  [2,15,91],,
2368  [      .SPACE $TEXT$
2369         .NSUBSPA $CODE$,COMDAT],,
2370 [AC_DEFINE(HAVE_GAS_NSUBSPA_COMDAT, 1, [Define if your assembler supports .nsubspa comdat option.])])
2371
2372 # .hidden needs to be supported in both the assembler and the linker,
2373 # because GNU LD versions before 2.12.1 have buggy support for STV_HIDDEN.
2374 # This is irritatingly difficult to feature test for; we have to check the
2375 # date string after the version number.  If we've got an in-tree
2376 # ld, we don't know its patchlevel version, so we set the baseline at 2.13
2377 # to be safe.
2378 # The gcc_GAS_CHECK_FEATURE call just sets a cache variable.
2379 gcc_GAS_CHECK_FEATURE([.hidden], gcc_cv_as_hidden,
2380  [elf,2,13,0],,
2381 [       .hidden foobar
2382 foobar:])
2383 case "${target}" in
2384   *-*-darwin*)
2385     # Darwin as has some visibility support, though with a different syntax.
2386     gcc_cv_as_hidden=yes
2387     ;;
2388 esac
2389
2390 # gnu_indirect_function type is an extension proposed at
2391 # http://groups.google/com/group/generic-abi/files. It allows dynamic runtime
2392 # selection of function implementation
2393 AC_ARG_ENABLE(gnu-indirect-function,
2394  [AS_HELP_STRING([--enable-gnu-indirect-function],
2395                  [enable the use of the @gnu_indirect_function to glibc systems])],
2396  [case $enable_gnu_indirect_function in
2397     yes | no) ;;
2398     *) AC_MSG_ERROR(['$enable_gnu_indirect_function' is an invalid value for --enable-gnu-indirect-function.
2399 Valid choices are 'yes' and 'no'.]) ;;
2400   esac],
2401  [enable_gnu_indirect_function="$default_gnu_indirect_function"])
2402
2403 gif=`if test x$enable_gnu_indirect_function = xyes; then echo 1; else echo 0; fi`
2404 AC_DEFINE_UNQUOTED(HAVE_GNU_INDIRECT_FUNCTION, $gif,
2405 [Define if your system supports gnu indirect functions.])
2406
2407
2408 changequote(,)dnl
2409 if test $in_tree_ld != yes ; then
2410   ld_ver=`$gcc_cv_ld --version 2>/dev/null | sed 1q`
2411   if echo "$ld_ver" | grep GNU > /dev/null; then
2412     if test x"$ld_is_gold" = xyes; then
2413       # GNU gold --version looks like this:
2414       #
2415       # GNU gold (GNU Binutils 2.21.51.20110225) 1.11
2416       #
2417       # We extract the binutils version which is more familiar and specific
2418       # than the gold version.
2419       ld_vers=`echo $ld_ver | sed -n \
2420           -e 's,^[^)]*[  ]\([0-9][0-9]*\.[0-9][0-9]*[^)]*\)) .*$,\1,p'`
2421     else
2422       # GNU ld --version looks like this:
2423       #
2424       # GNU ld (GNU Binutils) 2.21.51.20110225
2425       ld_vers=`echo $ld_ver | sed -n \
2426           -e 's,^.*[     ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2427     fi
2428     ld_date=`echo $ld_ver | sed -n 's,^.*\([2-9][0-9][0-9][0-9]\)[-]*\([01][0-9]\)[-]*\([0-3][0-9]\).*$,\1\2\3,p'`
2429     ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2430     ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2431     ld_vers_patch=`expr "$ld_vers" : '[0-9]*\.[0-9]*\.\([0-9]*\)'`
2432   else
2433     case "${target}" in
2434       *-*-solaris2*)
2435         # See acinclude.m4 (gcc_SUN_LD_VERSION) for the version number
2436         # format.
2437         #
2438         # Don't reuse gcc_gv_sun_ld_vers_* in case a linker other than
2439         # /usr/ccs/bin/ld has been configured.
2440         ld_ver=`$gcc_cv_ld -V 2>&1`
2441         if echo "$ld_ver" | grep 'Solaris Link Editors' > /dev/null; then
2442           ld_vers=`echo $ld_ver | sed -n \
2443             -e 's,^.*: 5\.[0-9][0-9]*-\([0-9]\.[0-9][0-9]*\).*$,\1,p'`
2444           ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2445           ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2446         fi
2447         ;;
2448     esac
2449   fi
2450 fi
2451 changequote([,])dnl
2452
2453 AC_CACHE_CHECK(linker for .hidden support, gcc_cv_ld_hidden,
2454 [[if test $in_tree_ld = yes ; then
2455   gcc_cv_ld_hidden=no
2456   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 13 -o "$gcc_cv_gld_major_version" -gt 2 \
2457      && test $in_tree_ld_is_elf = yes; then
2458      gcc_cv_ld_hidden=yes
2459   fi
2460 else
2461   gcc_cv_ld_hidden=yes
2462   if test x"$ld_is_gold" = xyes; then
2463     :
2464   elif echo "$ld_ver" | grep GNU > /dev/null; then
2465     case "${target}" in
2466       mmix-knuth-mmixware)
2467         # The linker emits by default mmo, not ELF, so "no" is appropriate.
2468         gcc_cv_ld_hidden=no
2469         ;;
2470     esac
2471     if test 0"$ld_date" -lt 20020404; then
2472       if test -n "$ld_date"; then
2473         # If there was date string, but was earlier than 2002-04-04, fail
2474         gcc_cv_ld_hidden=no
2475       elif test -z "$ld_vers"; then
2476         # If there was no date string nor ld version number, something is wrong
2477         gcc_cv_ld_hidden=no
2478       else
2479         test -z "$ld_vers_patch" && ld_vers_patch=0
2480         if test "$ld_vers_major" -lt 2; then
2481           gcc_cv_ld_hidden=no
2482         elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 12; then
2483           gcc_cv_ld_hidden="no"
2484         elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 12 -a "$ld_vers_patch" -eq 0; then
2485           gcc_cv_ld_hidden=no
2486         fi
2487       fi
2488     fi
2489   else
2490     case "${target}" in
2491       *-*-darwin*)
2492         # Darwin ld has some visibility support.
2493         gcc_cv_ld_hidden=yes
2494         ;;
2495       hppa64*-*-hpux* | ia64*-*-hpux*)
2496         gcc_cv_ld_hidden=yes
2497         ;;
2498       *-*-solaris2.1[0-9]*)
2499         # Support for .hidden in Sun ld appeared in Solaris 9 FCS, but
2500         # .symbolic was only added in Solaris 9 12/02.
2501         gcc_cv_ld_hidden=yes
2502         ;;
2503       *)
2504         gcc_cv_ld_hidden=no
2505         ;;
2506     esac
2507   fi
2508 fi]])
2509 libgcc_visibility=no
2510 AC_SUBST(libgcc_visibility)
2511 GCC_TARGET_TEMPLATE([HAVE_GAS_HIDDEN])
2512 if test $gcc_cv_as_hidden = yes && test $gcc_cv_ld_hidden = yes; then
2513   libgcc_visibility=yes
2514   AC_DEFINE(HAVE_GAS_HIDDEN, 1,
2515   [Define if your assembler and linker support .hidden.])
2516 fi
2517
2518 AC_MSG_CHECKING(linker read-only and read-write section mixing)
2519 gcc_cv_ld_ro_rw_mix=unknown
2520 if test $in_tree_ld = yes ; then
2521   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2 \
2522      && test $in_tree_ld_is_elf = yes; then
2523     gcc_cv_ld_ro_rw_mix=read-write
2524   fi
2525 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
2526   echo '.section myfoosect, "a"' > conftest1.s
2527   echo '.section myfoosect, "aw"' > conftest2.s
2528   echo '.byte 1' >> conftest2.s
2529   echo '.section myfoosect, "a"' > conftest3.s
2530   echo '.byte 0' >> conftest3.s
2531   if $gcc_cv_as -o conftest1.o conftest1.s > /dev/null 2>&1 \
2532      && $gcc_cv_as -o conftest2.o conftest2.s > /dev/null 2>&1 \
2533      && $gcc_cv_as -o conftest3.o conftest3.s > /dev/null 2>&1 \
2534      && $gcc_cv_ld -shared -o conftest1.so conftest1.o \
2535         conftest2.o conftest3.o > /dev/null 2>&1; then
2536     gcc_cv_ld_ro_rw_mix=`$gcc_cv_objdump -h conftest1.so \
2537                          | sed -e '/myfoosect/!d' -e N`
2538     if echo "$gcc_cv_ld_ro_rw_mix" | grep CONTENTS > /dev/null; then
2539       if echo "$gcc_cv_ld_ro_rw_mix" | grep READONLY > /dev/null; then
2540         gcc_cv_ld_ro_rw_mix=read-only
2541       else
2542         gcc_cv_ld_ro_rw_mix=read-write
2543       fi
2544     fi
2545   fi
2546 changequote(,)dnl
2547   rm -f conftest.* conftest[123].*
2548 changequote([,])dnl
2549 fi
2550 if test x$gcc_cv_ld_ro_rw_mix = xread-write; then
2551         AC_DEFINE(HAVE_LD_RO_RW_SECTION_MIXING, 1,
2552   [Define if your linker links a mix of read-only
2553    and read-write sections into a read-write section.])
2554 fi
2555 AC_MSG_RESULT($gcc_cv_ld_ro_rw_mix)
2556
2557 gcc_AC_INITFINI_ARRAY
2558
2559 # Check if we have .[us]leb128, and support symbol arithmetic with it.
2560 gcc_GAS_CHECK_FEATURE([.sleb128 and .uleb128], gcc_cv_as_leb128,
2561   [elf,2,11,0],,
2562 [       .data
2563         .uleb128 L2 - L1
2564 L1:
2565         .uleb128 1280
2566         .sleb128 -1010
2567 L2:],
2568 [[# GAS versions before 2.11 do not support uleb128,
2569   # despite appearing to.
2570   # ??? There exists an elf-specific test that will crash
2571   # the assembler.  Perhaps it's better to figure out whether
2572   # arbitrary sections are supported and try the test.
2573   as_ver=`$gcc_cv_as --version 2>/dev/null | sed 1q`
2574   if echo "$as_ver" | grep GNU > /dev/null; then
2575     as_vers=`echo $as_ver | sed -n \
2576         -e 's,^.*[       ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2577     as_major=`expr "$as_vers" : '\([0-9]*\)'`
2578     as_minor=`expr "$as_vers" : '[0-9]*\.\([0-9]*\)'`
2579     if test $as_major -eq 2 && test $as_minor -lt 11
2580     then :
2581     else gcc_cv_as_leb128=yes
2582     fi
2583   fi]],
2584   [AC_DEFINE(HAVE_AS_LEB128, 1,
2585     [Define if your assembler supports .sleb128 and .uleb128.])])
2586
2587 # Check if we have assembler support for unwind directives.
2588 gcc_GAS_CHECK_FEATURE([cfi directives], gcc_cv_as_cfi_directive,
2589   ,,
2590 [       .text
2591         .cfi_startproc
2592         .cfi_offset 0, 0
2593         .cfi_same_value 1
2594         .cfi_def_cfa 1, 2
2595         .cfi_escape 1, 2, 3, 4, 5
2596         .cfi_endproc],
2597 [case "$target" in
2598   *-*-solaris*)
2599     # If the linker used on Solaris (like Sun ld) isn't capable of merging
2600     # read-only and read-write sections, we need to make sure that the
2601     # assembler used emits read-write .eh_frame sections.
2602     if test "x$gcc_cv_ld_ro_rw_mix" != xread-write; then
2603       if test "x$gcc_cv_objdump" != x; then
2604         if $gcc_cv_objdump -h conftest.o 2>/dev/null | \
2605                 sed -e /.eh_frame/!d -e N | grep READONLY > /dev/null; then
2606           gcc_cv_as_cfi_directive=no
2607         else
2608           case "$target" in
2609             i?86-*-solaris2.1[[0-9]]* | x86_64-*-solaris2.1[[0-9]]*)
2610               # On Solaris/x86, make sure that GCC and assembler agree on using
2611               # read-only .eh_frame sections for 64-bit.
2612               if test x$gas = xyes; then
2613                  as_ix86_64_opt="--64"
2614               else
2615                  as_ix86_64_opt="-xarch=amd64"
2616               fi
2617               if $gcc_cv_as $as_ix86_64_opt -o conftest.o conftest.s > /dev/null 2>&1 && \
2618                 $gcc_cv_objdump -h conftest.o 2>/dev/null | \
2619                         sed -e /.eh_frame/!d -e N | \
2620                         grep READONLY > /dev/null; then
2621                 gcc_cv_as_cfi_directive=yes
2622               else
2623                 gcc_cv_as_cfi_directive=no
2624               fi
2625               ;;
2626             *)
2627               gcc_cv_as_cfi_directive=yes
2628               ;;
2629           esac
2630         fi
2631       else
2632         # no objdump, err on the side of caution
2633         gcc_cv_as_cfi_directive=no
2634       fi
2635     else
2636       gcc_cv_as_cfi_directive=yes
2637     fi
2638     ;;
2639   *-*-*)
2640     gcc_cv_as_cfi_directive=yes
2641     ;;
2642 esac])
2643 if test $gcc_cv_as_cfi_directive = yes && test x$gcc_cv_objdump != x; then
2644 gcc_GAS_CHECK_FEATURE([working cfi advance], gcc_cv_as_cfi_advance_working,
2645   ,,
2646 [       .text
2647         .cfi_startproc
2648         .cfi_adjust_cfa_offset 64
2649         .skip 75040, 0
2650         .cfi_adjust_cfa_offset 128
2651         .cfi_endproc],
2652 [[
2653 if $gcc_cv_objdump -Wf conftest.o 2>/dev/null \
2654     | grep 'DW_CFA_advance_loc[24]:[    ][      ]*75040[        ]' >/dev/null; then
2655    gcc_cv_as_cfi_advance_working=yes
2656 fi
2657 ]])
2658 else
2659   # no objdump, err on the side of caution
2660   gcc_cv_as_cfi_advance_working=no
2661 fi
2662 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_DIRECTIVE)
2663 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_DIRECTIVE,
2664   [`if test $gcc_cv_as_cfi_directive = yes \
2665        && test $gcc_cv_as_cfi_advance_working = yes; then echo 1; else echo 0; fi`],
2666   [Define 0/1 if your assembler supports CFI directives.])
2667
2668 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE)
2669 gcc_GAS_CHECK_FEATURE([cfi personality directive],
2670   gcc_cv_as_cfi_personality_directive, ,,
2671 [       .text
2672         .cfi_startproc
2673         .cfi_personality 0, symbol
2674         .cfi_endproc])
2675 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE,
2676   [`if test $gcc_cv_as_cfi_personality_directive = yes;
2677     then echo 1; else echo 0; fi`],
2678   [Define 0/1 if your assembler supports .cfi_personality.])
2679
2680 gcc_GAS_CHECK_FEATURE([cfi sections directive],
2681   gcc_cv_as_cfi_sections_directive, ,,
2682 [       .text
2683         .cfi_sections .debug_frame, .eh_frame
2684         .cfi_startproc
2685         .cfi_endproc],
2686 [case $target_os in
2687   win32 | pe | cygwin* | mingw32* | uwin*)
2688     # Need to check that we generated the correct relocation for the
2689     # .debug_frame section.  This was fixed for binutils 2.21.
2690     gcc_cv_as_cfi_sections_directive=no
2691     if test "x$gcc_cv_objdump" != x; then
2692      if $gcc_cv_objdump -j .debug_frame -r conftest.o 2>/dev/null | \
2693         grep secrel > /dev/null; then
2694       gcc_cv_as_cfi_sections_directive=yes
2695      fi
2696     fi
2697     ;;
2698   *)
2699     gcc_cv_as_cfi_sections_directive=yes
2700     ;;
2701 esac])
2702 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_SECTIONS_DIRECTIVE)
2703 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_SECTIONS_DIRECTIVE,
2704   [`if test $gcc_cv_as_cfi_sections_directive = yes;
2705     then echo 1; else echo 0; fi`],
2706   [Define 0/1 if your assembler supports .cfi_sections.])
2707
2708 # GAS versions up to and including 2.11.0 may mis-optimize
2709 # .eh_frame data.
2710 gcc_GAS_CHECK_FEATURE(eh_frame optimization, gcc_cv_as_eh_frame,
2711   [elf,2,12,0],,
2712 [       .text
2713 .LFB1:
2714         .4byte  0
2715 .L1:
2716         .4byte  0
2717 .LFE1:
2718         .section        .eh_frame,"aw",@progbits
2719 __FRAME_BEGIN__:
2720         .4byte  .LECIE1-.LSCIE1
2721 .LSCIE1:
2722         .4byte  0x0
2723         .byte   0x1
2724         .ascii "z\0"
2725         .byte   0x1
2726         .byte   0x78
2727         .byte   0x1a
2728         .byte   0x0
2729         .byte   0x4
2730         .4byte  1
2731         .p2align 1
2732 .LECIE1:
2733 .LSFDE1:
2734         .4byte  .LEFDE1-.LASFDE1
2735 .LASFDE1:
2736         .4byte  .LASFDE1-__FRAME_BEGIN__
2737         .4byte  .LFB1
2738         .4byte  .LFE1-.LFB1
2739         .byte   0x4
2740         .4byte  .LFE1-.LFB1
2741         .byte   0x4
2742         .4byte  .L1-.LFB1
2743 .LEFDE1:],
2744 [  dnl # For autoconf 2.5x, must protect trailing spaces with @&t@.
2745 cat > conftest.lit <<EOF
2746  0000 10000000 00000000 017a0001 781a0004  .........z..x...
2747  0010 01000000 12000000 18000000 00000000  ................
2748  0020 08000000 04080000 0044               .........D      @&t@
2749 EOF
2750 cat > conftest.big <<EOF
2751  0000 00000010 00000000 017a0001 781a0004  .........z..x...
2752  0010 00000001 00000012 00000018 00000000  ................
2753  0020 00000008 04000000 0844               .........D      @&t@
2754 EOF
2755   # If the assembler didn't choke, and we can objdump,
2756   # and we got the correct data, then succeed.
2757   # The text in the here-document typically retains its unix-style line
2758   # endings, while the output of objdump will use host line endings.
2759   # Therefore, use diff -b for the comparisons.
2760   if test x$gcc_cv_objdump != x \
2761   && $gcc_cv_objdump -s -j .eh_frame conftest.o 2>/dev/null \
2762      | tail -3 > conftest.got \
2763   && { diff -b conftest.lit conftest.got > /dev/null 2>&1 \
2764     || diff -b conftest.big conftest.got > /dev/null 2>&1; }
2765   then
2766     gcc_cv_as_eh_frame=yes
2767   elif AC_TRY_COMMAND($gcc_cv_as -o conftest.o --traditional-format /dev/null); then
2768     gcc_cv_as_eh_frame=buggy
2769   else
2770     # Uh oh, what do we do now?
2771     gcc_cv_as_eh_frame=no
2772   fi])
2773
2774 if test $gcc_cv_as_eh_frame = buggy; then
2775   AC_DEFINE(USE_AS_TRADITIONAL_FORMAT, 1,
2776   [Define if your assembler mis-optimizes .eh_frame data.])
2777 fi
2778
2779 gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2780  [elf,2,12,0], [--fatal-warnings],
2781  [.section .rodata.str, "aMS", @progbits, 1])
2782 if test $gcc_cv_as_shf_merge = no; then
2783   gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2784     [elf,2,12,0], [--fatal-warnings],
2785     [.section .rodata.str, "aMS", %progbits, 1])
2786 fi
2787 AC_DEFINE_UNQUOTED(HAVE_GAS_SHF_MERGE,
2788   [`if test $gcc_cv_as_shf_merge = yes; then echo 1; else echo 0; fi`],
2789 [Define 0/1 if your assembler supports marking sections with SHF_MERGE flag.])
2790
2791 gcc_GAS_CHECK_FEATURE([COMDAT group support (GNU as)],
2792  gcc_cv_as_comdat_group,
2793  [elf,2,16,0], [--fatal-warnings],
2794  [.section .text,"axG",@progbits,.foo,comdat])
2795 if test $gcc_cv_as_comdat_group = yes; then
2796   gcc_cv_as_comdat_group_percent=no
2797   gcc_cv_as_comdat_group_group=no
2798 else
2799  gcc_GAS_CHECK_FEATURE([COMDAT group support (GNU as, %type)],
2800    gcc_cv_as_comdat_group_percent,
2801    [elf,2,16,0], [--fatal-warnings],
2802    [.section .text,"axG",%progbits,.foo,comdat])
2803  if test $gcc_cv_as_comdat_group_percent = yes; then
2804    gcc_cv_as_comdat_group_group=no
2805  else
2806    case "${target}" in
2807      # Sun as uses a completely different syntax.
2808      *-*-solaris2*)
2809        case "${target}" in
2810          sparc*-*-solaris2*)
2811            conftest_s='
2812                .group foo,".text%foo",#comdat
2813                .section ".text%foo", #alloc,#execinstr,#progbits
2814                .globl foo
2815              foo:
2816              '
2817            ;;
2818          i?86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
2819            conftest_s='
2820                .group foo,.text%foo,#comdat
2821                .section .text%foo, "ax", @progbits
2822                .globl  foo
2823              foo:
2824              '
2825            ;;
2826        esac
2827        gcc_GAS_CHECK_FEATURE([COMDAT group support (Sun as, .group)],
2828          gcc_cv_as_comdat_group_group,
2829          ,, [$conftest_s])
2830        ;;
2831    esac
2832    if test -z "${gcc_cv_as_comdat_group_group+set}"; then
2833      gcc_cv_as_comdat_group_group=no
2834    fi
2835  fi
2836 fi
2837 if test x"$ld_is_gold" = xyes; then
2838   comdat_group=yes
2839 elif test $in_tree_ld = yes ; then
2840   comdat_group=no
2841   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
2842      && test $in_tree_ld_is_elf = yes; then
2843      comdat_group=yes
2844   fi
2845 elif echo "$ld_ver" | grep GNU > /dev/null; then
2846   comdat_group=yes
2847   if test 0"$ld_date" -lt 20050308; then
2848     if test -n "$ld_date"; then
2849       # If there was date string, but was earlier than 2005-03-08, fail
2850       comdat_group=no
2851     elif test "$ld_vers_major" -lt 2; then
2852       comdat_group=no
2853     elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
2854       comdat_group=no
2855     fi
2856   fi
2857 else
2858 changequote(,)dnl
2859   case "${target}" in
2860     *-*-solaris2.1[1-9]*)
2861       comdat_group=no
2862       # Sun ld has COMDAT group support since Solaris 9, but it doesn't
2863       # interoperate with GNU as until Solaris 11 build 130, i.e. ld
2864       # version 1.688.
2865       #
2866       # If using Sun as for COMDAT group as emitted by GCC, one needs at
2867       # least ld version 1.2267.
2868       if test "$ld_vers_major" -gt 1; then
2869         comdat_group=yes
2870       elif test "x$gas_flag" = xyes && test "$ld_vers_minor" -ge 1688; then
2871         comdat_group=yes
2872       elif test "$ld_vers_minor" -ge 2267; then
2873         comdat_group=yes
2874       fi
2875       ;;
2876     *)
2877       # Assume linkers other than GNU ld don't support COMDAT group.
2878       comdat_group=no
2879       ;;
2880   esac
2881 changequote([,])dnl
2882 fi
2883 # Allow overriding the automatic COMDAT group tests above.
2884 AC_ARG_ENABLE(comdat,
2885   [AS_HELP_STRING([--enable-comdat], [enable COMDAT group support])],
2886   [comdat_group="$enable_comdat"])
2887 if test $comdat_group = no; then
2888   gcc_cv_as_comdat_group=no
2889   gcc_cv_as_comdat_group_percent=no
2890   gcc_cv_as_comdat_group_group=no
2891 fi
2892 AC_DEFINE_UNQUOTED(HAVE_COMDAT_GROUP,
2893   [`if test $gcc_cv_as_comdat_group = yes \
2894     || test $gcc_cv_as_comdat_group_percent = yes \
2895     || test $gcc_cv_as_comdat_group_group = yes; then echo 1; else echo 0; fi`],
2896 [Define 0/1 if your assembler and linker support COMDAT groups.])
2897
2898 gcc_GAS_CHECK_FEATURE([line table discriminator support],
2899  gcc_cv_as_discriminator,
2900  [2,19,51],,
2901 [       .text
2902         .file 1 "conf.c"
2903         .loc 1 1 0 discriminator 1],,
2904 [AC_DEFINE(HAVE_GAS_DISCRIMINATOR, 1,
2905   [Define if your assembler supports the .loc discriminator sub-directive.])])
2906
2907 # Thread-local storage - the check is heavily parameterized.
2908 conftest_s=
2909 tls_first_major=
2910 tls_first_minor=
2911 tls_as_opt=
2912 case "$target" in
2913 changequote(,)dnl
2914   alpha*-*-*)
2915     conftest_s='
2916         .section ".tdata","awT",@progbits
2917 foo:    .long   25
2918         .text
2919         ldq     $27,__tls_get_addr($29)         !literal!1
2920         lda     $16,foo($29)                    !tlsgd!1
2921         jsr     $26,($27),__tls_get_addr        !lituse_tlsgd!1
2922         ldq     $27,__tls_get_addr($29)         !literal!2
2923         lda     $16,foo($29)                    !tlsldm!2
2924         jsr     $26,($27),__tls_get_addr        !lituse_tlsldm!2
2925         ldq     $1,foo($29)                     !gotdtprel
2926         ldah    $2,foo($29)                     !dtprelhi
2927         lda     $3,foo($2)                      !dtprello
2928         lda     $4,foo($29)                     !dtprel
2929         ldq     $1,foo($29)                     !gottprel
2930         ldah    $2,foo($29)                     !tprelhi
2931         lda     $3,foo($2)                      !tprello
2932         lda     $4,foo($29)                     !tprel'
2933         tls_first_major=2
2934         tls_first_minor=13
2935         tls_as_opt=--fatal-warnings
2936         ;;
2937   cris-*-*|crisv32-*-*)
2938     conftest_s='
2939         .section ".tdata","awT",@progbits
2940 x:      .long   25
2941         .text
2942         move.d x:IE,$r10
2943         nop'
2944         tls_first_major=2
2945         tls_first_minor=20
2946         tls_as_opt=--fatal-warnings
2947         ;;
2948   frv*-*-*)
2949     conftest_s='
2950         .section ".tdata","awT",@progbits
2951 x:      .long   25
2952         .text
2953         call    #gettlsoff(x)'
2954         tls_first_major=2
2955         tls_first_minor=14
2956         ;;
2957   hppa*-*-linux*)
2958     conftest_s='
2959 t1:     .reg    %r20
2960 t2:     .reg    %r21
2961 gp:     .reg    %r19
2962         .section ".tdata","awT",@progbits
2963 foo:    .long   25
2964         .text
2965         .align  4
2966         addil LT%foo-$tls_gdidx$,gp
2967         ldo RT%foo-$tls_gdidx$(%r1),%arg0
2968         b __tls_get_addr
2969         nop
2970         addil LT%foo-$tls_ldidx$,gp
2971         b __tls_get_addr
2972         ldo RT%foo-$tls_ldidx$(%r1),%arg0
2973         addil LR%foo-$tls_dtpoff$,%ret0
2974         ldo RR%foo-$tls_dtpoff$(%r1),%t1
2975         mfctl %cr27,%t1
2976         addil LT%foo-$tls_ieoff$,gp
2977         ldw RT%foo-$tls_ieoff$(%r1),%t2
2978         add %t1,%t2,%t3
2979         mfctl %cr27,%t1
2980         addil LR%foo-$tls_leoff$,%t1
2981         ldo RR%foo-$tls_leoff$(%r1),%t2'
2982         tls_first_major=2
2983         tls_first_minor=15
2984         tls_as_opt=--fatal-warnings
2985         ;;
2986   arm*-*-*)
2987     conftest_s='
2988         .section ".tdata","awT",%progbits
2989 foo:    .long   25
2990         .text
2991 .word foo(gottpoff)
2992 .word foo(tpoff)
2993 .word foo(tlsgd)
2994 .word foo(tlsldm)
2995 .word foo(tlsldo)'
2996         tls_first_major=2
2997         tls_first_minor=17
2998         ;;
2999   i[34567]86-*-* | x86_64-*-*)
3000     case "$target" in
3001       i[34567]86-*-solaris2.* | x86_64-*-solaris2.1[0-9]*)
3002         on_solaris=yes
3003         ;;
3004       *)
3005         on_solaris=no
3006         ;;
3007     esac
3008     if test x$on_solaris = xyes && test x$gas_flag = xno; then
3009       conftest_s='
3010         .section .tdata,"awt",@progbits'
3011       tls_first_major=0
3012       tls_first_minor=0
3013       tls_section_flag=t
3014 changequote([,])dnl
3015       AC_DEFINE(TLS_SECTION_ASM_FLAG, 't',
3016 [Define to the flag used to mark TLS sections if the default (`T') doesn't work.])
3017 changequote(,)dnl
3018     else
3019       conftest_s='
3020         .section ".tdata","awT",@progbits'
3021       tls_first_major=2
3022       tls_first_minor=14
3023       tls_section_flag=T
3024       tls_as_opt="--fatal-warnings"
3025     fi
3026     case "$target" in
3027       i[34567]86-*-*)
3028         conftest_s="$conftest_s
3029 foo:    .long   25
3030         .text
3031         movl    %gs:0, %eax
3032         leal    foo@tlsgd(,%ebx,1), %eax
3033         leal    foo@tlsldm(%ebx), %eax
3034         leal    foo@dtpoff(%eax), %edx
3035         movl    foo@gottpoff(%ebx), %eax
3036         subl    foo@gottpoff(%ebx), %eax
3037         addl    foo@gotntpoff(%ebx), %eax
3038         movl    foo@indntpoff, %eax
3039         movl    \$foo@tpoff, %eax
3040         subl    \$foo@tpoff, %eax
3041         leal    foo@ntpoff(%ecx), %eax"
3042         ;;
3043       x86_64-*-*)
3044         if test x$on_solaris = xyes; then
3045           case $gas_flag in
3046             yes) tls_as_opt="$tls_as_opt --64" ;;
3047             no)  tls_as_opt="$tls_as_opt -xarch=amd64" ;;
3048           esac
3049         fi
3050         conftest_s="$conftest_s
3051 foo:    .long   25
3052         .text
3053         movq    %fs:0, %rax
3054         leaq    foo@tlsgd(%rip), %rdi
3055         leaq    foo@tlsld(%rip), %rdi
3056         leaq    foo@dtpoff(%rax), %rdx
3057         movq    foo@gottpoff(%rip), %rax
3058         movq    \$foo@tpoff, %rax"
3059         ;;
3060     esac
3061     ;;
3062   ia64-*-*)
3063     conftest_s='
3064         .section ".tdata","awT",@progbits
3065 foo:    data8   25
3066         .text
3067         addl    r16 = @ltoff(@dtpmod(foo#)), gp
3068         addl    r17 = @ltoff(@dtprel(foo#)), gp
3069         addl    r18 = @ltoff(@tprel(foo#)), gp
3070         addl    r19 = @dtprel(foo#), gp
3071         adds    r21 = @dtprel(foo#), r13
3072         movl    r23 = @dtprel(foo#)
3073         addl    r20 = @tprel(foo#), gp
3074         adds    r22 = @tprel(foo#), r13
3075         movl    r24 = @tprel(foo#)'
3076         tls_first_major=2
3077         tls_first_minor=13
3078         tls_as_opt=--fatal-warnings
3079         ;;
3080   microblaze*-*-*)
3081     conftest_s='
3082         .section .tdata,"awT",@progbits
3083 x:
3084         .word 2
3085         .text
3086         addik r5,r20,x@TLSGD
3087         addik r5,r20,x@TLSLDM'
3088         tls_first_major=2
3089         tls_first_minor=20
3090         tls_as_opt='--fatal-warnings'
3091         ;;
3092   mips*-*-*)
3093     conftest_s='
3094         .section .tdata,"awT",@progbits
3095 x:
3096         .word 2
3097         .text
3098         addiu $4, $28, %tlsgd(x)
3099         addiu $4, $28, %tlsldm(x)
3100         lui $4, %dtprel_hi(x)
3101         addiu $4, $4, %dtprel_lo(x)
3102         lw $4, %gottprel(x)($28)
3103         lui $4, %tprel_hi(x)
3104         addiu $4, $4, %tprel_lo(x)'
3105         tls_first_major=2
3106         tls_first_minor=16
3107         tls_as_opt='-32 --fatal-warnings'
3108         ;;
3109   m68k-*-*)
3110     conftest_s='
3111         .section .tdata,"awT",@progbits
3112 x:
3113         .word 2
3114         .text
3115 foo:
3116         move.l x@TLSGD(%a5),%a0
3117         move.l x@TLSLDM(%a5),%a0
3118         move.l x@TLSLDO(%a5),%a0
3119         move.l x@TLSIE(%a5),%a0
3120         move.l x@TLSLE(%a5),%a0'
3121         tls_first_major=2
3122         tls_first_minor=19
3123         tls_as_opt='--fatal-warnings'
3124         ;;
3125   nios2-*-*)
3126       conftest_s='
3127         .section ".tdata","awT",@progbits'
3128         tls_first_major=2
3129         tls_first_minor=23
3130         tls_as_opt="--fatal-warnings"
3131         ;;
3132   aarch64*-*-*)
3133     conftest_s='
3134         .section ".tdata","awT",%progbits
3135 foo:    .long   25
3136         .text
3137         adrp  x0, :tlsgd:x
3138         add   x0, x0, #:tlsgd_lo12:x
3139         bl    __tls_get_addr
3140         nop'
3141         tls_first_major=2
3142         tls_first_minor=20
3143         tls_as_opt='--fatal-warnings'
3144         ;;
3145   powerpc-ibm-aix*)
3146     conftest_s='
3147         .extern __get_tpointer
3148         .toc
3149 LC..1:
3150         .tc a[TC],a[TL]@le
3151         .csect .text[PR]
3152 .tlstest:
3153         lwz 9,LC..1(2)
3154         bla __get_tpointer
3155         lwzx 3,9,3
3156         .globl a
3157         .csect a[TL],4
3158 a:
3159         .space 4'
3160         tls_first_major=0
3161         tls_first_minor=0
3162         ;;
3163   powerpc64*-*-*)
3164     conftest_s='
3165         .section ".tdata","awT",@progbits
3166         .align 3
3167 ld0:    .space 8
3168 ld1:    .space 8
3169 x1:     .space 8
3170 x2:     .space 8
3171 x3:     .space 8
3172         .text
3173         addi 3,2,ld0@got@tlsgd
3174         bl .__tls_get_addr
3175         nop
3176         addi 3,2,ld1@toc
3177         bl .__tls_get_addr
3178         nop
3179         addi 3,2,x1@got@tlsld
3180         bl .__tls_get_addr
3181         nop
3182         addi 9,3,x1@dtprel
3183         bl .__tls_get_addr
3184         nop
3185         addis 9,3,x2@dtprel@ha
3186         addi 9,9,x2@dtprel@l
3187         bl .__tls_get_addr
3188         nop
3189         ld 9,x3@got@dtprel(2)
3190         add 9,9,3
3191         bl .__tls_get_addr
3192         nop'
3193         tls_first_major=2
3194         tls_first_minor=14
3195         tls_as_opt="-a64 --fatal-warnings"
3196         ;;
3197   powerpc*-*-*)
3198     conftest_s='
3199         .section ".tdata","awT",@progbits
3200         .align 2
3201 ld0:    .space 4
3202 ld1:    .space 4
3203 x1:     .space 4
3204 x2:     .space 4
3205 x3:     .space 4
3206         .text
3207         addi 3,31,ld0@got@tlsgd
3208         bl __tls_get_addr
3209         addi 3,31,x1@got@tlsld
3210         bl __tls_get_addr
3211         addi 9,3,x1@dtprel
3212         addis 9,3,x2@dtprel@ha
3213         addi 9,9,x2@dtprel@l
3214         lwz 9,x3@got@tprel(31)
3215         add 9,9,x@tls
3216         addi 9,2,x1@tprel
3217         addis 9,2,x2@tprel@ha
3218         addi 9,9,x2@tprel@l'
3219         tls_first_major=2
3220         tls_first_minor=14
3221         tls_as_opt="-a32 --fatal-warnings"
3222         ;;
3223   s390-*-*)
3224     conftest_s='
3225         .section ".tdata","awT",@progbits
3226 foo:    .long   25
3227         .text
3228         .long   foo@TLSGD
3229         .long   foo@TLSLDM
3230         .long   foo@DTPOFF
3231         .long   foo@NTPOFF
3232         .long   foo@GOTNTPOFF
3233         .long   foo@INDNTPOFF
3234         l       %r1,foo@GOTNTPOFF(%r12)
3235         l       %r1,0(%r1):tls_load:foo
3236         bas     %r14,0(%r1,%r13):tls_gdcall:foo
3237         bas     %r14,0(%r1,%r13):tls_ldcall:foo'
3238         tls_first_major=2
3239         tls_first_minor=14
3240         tls_as_opt="-m31 --fatal-warnings"
3241         ;;
3242   s390x-*-*)
3243     conftest_s='
3244         .section ".tdata","awT",@progbits
3245 foo:    .long   25
3246         .text
3247         .quad   foo@TLSGD
3248         .quad   foo@TLSLDM
3249         .quad   foo@DTPOFF
3250         .quad   foo@NTPOFF
3251         .quad   foo@GOTNTPOFF
3252         lg      %r1,foo@GOTNTPOFF(%r12)
3253         larl    %r1,foo@INDNTPOFF
3254         brasl   %r14,__tls_get_offset@PLT:tls_gdcall:foo
3255         brasl   %r14,__tls_get_offset@PLT:tls_ldcall:foo'
3256         tls_first_major=2
3257         tls_first_minor=14
3258         tls_as_opt="-m64 -Aesame --fatal-warnings"
3259         ;;
3260   sh-*-* | sh[34]-*-*)
3261     conftest_s='
3262         .section ".tdata","awT",@progbits
3263 foo:    .long   25
3264         .text
3265         .long   foo@TLSGD
3266         .long   foo@TLSLDM
3267         .long   foo@DTPOFF
3268         .long   foo@GOTTPOFF
3269         .long   foo@TPOFF'
3270         tls_first_major=2
3271         tls_first_minor=13
3272         tls_as_opt=--fatal-warnings
3273         ;;
3274   sparc*-*-*)
3275     case "$target" in
3276       sparc*-sun-solaris2.*)
3277         on_solaris=yes
3278         ;;
3279       *)
3280         on_solaris=no
3281         ;;
3282     esac
3283     if test x$on_solaris = xyes && test x$gas_flag = xno; then
3284       conftest_s='
3285         .section ".tdata",#alloc,#write,#tls'
3286         tls_first_major=0
3287         tls_first_minor=0
3288     else
3289       conftest_s='
3290         .section ".tdata","awT",@progbits'
3291         tls_first_major=2
3292         tls_first_minor=14
3293         tls_as_opt="-32 --fatal-warnings"
3294     fi
3295     conftest_s="$conftest_s
3296 foo:    .long   25
3297         .text
3298         sethi   %tgd_hi22(foo), %o0
3299         add     %o0, %tgd_lo10(foo), %o1
3300         add     %l7, %o1, %o0, %tgd_add(foo)
3301         call    __tls_get_addr, %tgd_call(foo)
3302         sethi   %tldm_hi22(foo), %l1
3303         add     %l1, %tldm_lo10(foo), %l2
3304         add     %l7, %l2, %o0, %tldm_add(foo)
3305         call    __tls_get_addr, %tldm_call(foo)
3306         sethi   %tldo_hix22(foo), %l3
3307         xor     %l3, %tldo_lox10(foo), %l4
3308         add     %o0, %l4, %l5, %tldo_add(foo)
3309         sethi   %tie_hi22(foo), %o3
3310         add     %o3, %tie_lo10(foo), %o3
3311         ld      [%l7 + %o3], %o2, %tie_ld(foo)
3312         add     %g7, %o2, %o4, %tie_add(foo)
3313         sethi   %tle_hix22(foo), %l1
3314         xor     %l1, %tle_lox10(foo), %o5
3315         ld      [%g7 + %o5], %o1"
3316         ;;
3317   tilepro*-*-*)
3318       conftest_s='
3319         .section ".tdata","awT",@progbits
3320 foo:    .long   25
3321         .text
3322         addli   r0, zero, tls_gd(foo)
3323         auli    r0, zero, tls_gd_ha16(foo)
3324         addli   r0, r0, tls_gd_lo16(foo)
3325         jal     __tls_get_addr
3326         addli   r0, zero, tls_ie(foo)
3327         auli    r0, r0, tls_ie_ha16(foo)
3328         addli   r0, r0, tls_ie_lo16(foo)'
3329         tls_first_major=2
3330         tls_first_minor=22
3331         tls_as_opt="--fatal-warnings"
3332         ;;
3333   tilegx*-*-*)
3334       conftest_s='
3335         .section ".tdata","awT",@progbits
3336 foo:    .long   25
3337         .text
3338         shl16insli r0, zero, hw0_last_tls_gd(foo)
3339         shl16insli r0, zero, hw1_last_tls_gd(foo)
3340         shl16insli r0, r0,   hw0_tls_gd(foo)
3341         jal        __tls_get_addr
3342         shl16insli r0, zero, hw1_last_tls_ie(foo)
3343         shl16insli r0, r0,   hw0_tls_ie(foo)'
3344         tls_first_major=2
3345         tls_first_minor=22
3346         tls_as_opt="--fatal-warnings"
3347         ;;
3348   xtensa*-*-*)
3349     conftest_s='
3350         .section ".tdata","awT",@progbits
3351 foo:    .long   25
3352         .text
3353         movi    a8, foo@TLSFUNC
3354         movi    a10, foo@TLSARG
3355         callx8.tls a8, foo@TLSCALL'
3356         tls_first_major=2
3357         tls_first_minor=19
3358         ;;
3359 changequote([,])dnl
3360 esac
3361 set_have_as_tls=no
3362 if test "x$enable_tls" = xno ; then
3363   : # TLS explicitly disabled.
3364 elif test "x$enable_tls" = xyes ; then
3365   set_have_as_tls=yes # TLS explicitly enabled.
3366 elif test -z "$tls_first_major"; then
3367   : # If we don't have a check, assume no support.
3368 else
3369   gcc_GAS_CHECK_FEATURE(thread-local storage support, gcc_cv_as_tls,
3370   [$tls_first_major,$tls_first_minor,0], [$tls_as_opt], [$conftest_s],,
3371   [set_have_as_tls=yes])
3372 fi
3373 if test $set_have_as_tls = yes ; then
3374   AC_DEFINE(HAVE_AS_TLS, 1,
3375             [Define if your assembler and linker support thread-local storage.])
3376 fi
3377
3378 # Target-specific assembler checks.
3379
3380 AC_MSG_CHECKING(linker -Bstatic/-Bdynamic option)
3381 gcc_cv_ld_static_dynamic=no
3382 gcc_cv_ld_static_option='-Bstatic'
3383 gcc_cv_ld_dynamic_option='-Bdynamic'
3384 if test $in_tree_ld = yes ; then
3385   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2; then
3386     gcc_cv_ld_static_dynamic=yes
3387   fi
3388 elif test x$gcc_cv_ld != x; then
3389   # Check if linker supports -Bstatic/-Bdynamic option
3390   if $gcc_cv_ld --help 2>/dev/null | grep -- -Bstatic > /dev/null \
3391      && $gcc_cv_ld --help 2>/dev/null | grep -- -Bdynamic > /dev/null; then
3392       gcc_cv_ld_static_dynamic=yes
3393   else
3394     case "$target" in
3395       # AIX ld uses -b flags
3396       *-*-aix4.[[23]]* | *-*-aix[[5-9]]*)
3397         gcc_cv_ld_static_dynamic=yes
3398         gcc_cv_ld_static_option="-bstatic"
3399         gcc_cv_ld_dynamic_option="-bdynamic"
3400         ;;
3401       # HP-UX ld uses -a flags to select between shared and archive.
3402       *-*-hpux*)
3403         if test x"$gnu_ld" = xno; then
3404           gcc_cv_ld_static_dynamic=yes
3405           gcc_cv_ld_static_option="-aarchive_shared"
3406           gcc_cv_ld_dynamic_option="-adefault"
3407         fi
3408         ;;
3409       # Solaris 2 ld always supports -Bstatic/-Bdynamic.
3410       *-*-solaris2*)
3411         gcc_cv_ld_static_dynamic=yes
3412         ;;
3413     esac
3414   fi
3415 fi
3416 if test x"$gcc_cv_ld_static_dynamic" = xyes; then
3417         AC_DEFINE(HAVE_LD_STATIC_DYNAMIC, 1,
3418 [Define if your linker supports -Bstatic/-Bdynamic or equivalent options.])
3419         AC_DEFINE_UNQUOTED(LD_STATIC_OPTION, "$gcc_cv_ld_static_option",
3420 [Define to the linker option to disable use of shared objects.])
3421         AC_DEFINE_UNQUOTED(LD_DYNAMIC_OPTION, "$gcc_cv_ld_dynamic_option",
3422 [Define to the linker option to enable use of shared objects.])
3423 fi
3424 AC_MSG_RESULT($gcc_cv_ld_static_dynamic)
3425
3426 if test x"$demangler_in_ld" = xyes; then
3427   AC_MSG_CHECKING(linker --demangle support)
3428   gcc_cv_ld_demangle=no
3429   if test $in_tree_ld = yes; then
3430     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 14 -o "$gcc_cv_gld_major_version" -gt 2; then \
3431       gcc_cv_ld_demangle=yes
3432     fi
3433   elif test x$gcc_cv_ld != x -a x"$gnu_ld" = xyes; then
3434     # Check if the GNU linker supports --demangle option
3435     if $gcc_cv_ld --help 2>/dev/null | grep no-demangle > /dev/null; then
3436       gcc_cv_ld_demangle=yes
3437     fi
3438   fi
3439   if test x"$gcc_cv_ld_demangle" = xyes; then
3440     AC_DEFINE(HAVE_LD_DEMANGLE, 1,
3441 [Define if your linker supports --demangle option.])
3442   fi
3443   AC_MSG_RESULT($gcc_cv_ld_demangle)
3444 fi
3445
3446 AC_MSG_CHECKING(linker plugin support)
3447 gcc_cv_lto_plugin=0
3448 if test -f liblto_plugin.la; then
3449   save_ld_ver="$ld_ver"
3450   save_ld_vers_major="$ld_vers_major"
3451   save_ld_vers_minor="$ld_vers_minor"
3452   save_ld_is_gold="$ld_is_gold"
3453
3454   ld_is_gold=no
3455
3456   if test $in_tree_ld = yes -a x"$ORIGINAL_PLUGIN_LD_FOR_TARGET" = x"$gcc_cv_ld"; then
3457     ld_ver="GNU ld"
3458     # FIXME: ld_is_gold?
3459     ld_vers_major="$gcc_cv_gld_major_version"
3460     ld_vers_minor="$gcc_cv_gld_minor_version"
3461   else
3462     # Determine plugin linker version.
3463     # FIXME: Partial duplicate from above, generalize.
3464 changequote(,)dnl
3465     ld_ver=`$ORIGINAL_PLUGIN_LD_FOR_TARGET --version 2>/dev/null | sed 1q`
3466     if echo "$ld_ver" | grep GNU > /dev/null; then
3467       if echo "$ld_ver" | grep "GNU gold" > /dev/null; then
3468         ld_is_gold=yes
3469         ld_vers=`echo $ld_ver | sed -n \
3470             -e 's,^[^)]*[        ]\([0-9][0-9]*\.[0-9][0-9]*[^)]*\)) .*$,\1,p'`
3471       else
3472         ld_vers=`echo $ld_ver | sed -n \
3473             -e 's,^.*[   ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
3474       fi
3475       ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
3476       ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
3477     fi
3478 changequote([,])dnl
3479   fi
3480
3481   # Determine plugin support.
3482   if echo "$ld_ver" | grep GNU > /dev/null; then
3483     # Require GNU ld or gold 2.21+ for plugin support by default.
3484     if test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -ge 21; then
3485       gcc_cv_lto_plugin=2
3486     # Allow -fuse-linker-plugin to enable plugin support in GNU gold 2.20.
3487     elif test "$ld_is_gold" = yes -a "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 20; then
3488       gcc_cv_lto_plugin=1
3489     fi
3490   fi
3491
3492   ld_ver="$save_ld_ver"
3493   ld_vers_major="$save_ld_vers_major"
3494   ld_vers_minor="$save_ld_vers_minor"
3495   ld_is_gold="$save_ld_is_gold"
3496 fi
3497 AC_DEFINE_UNQUOTED(HAVE_LTO_PLUGIN, $gcc_cv_lto_plugin,
3498   [Define to the level of your linker's plugin support.])
3499 AC_MSG_RESULT($gcc_cv_lto_plugin)
3500
3501 case "$target" in
3502   aarch64*-*-*)
3503     gcc_GAS_CHECK_FEATURE([-mabi option], gcc_cv_as_aarch64_mabi,,
3504                           [-mabi=lp64], [.text],,,)
3505     if test x$gcc_cv_as_aarch64_mabi = xyes; then
3506       AC_DEFINE(HAVE_AS_MABI_OPTION, 1,
3507                 [Define if your assembler supports the -mabi option.])
3508     else
3509       if test x$with_abi = xilp32; then
3510         AC_MSG_ERROR([Assembler does not support -mabi=ilp32.\
3511                      Upgrade the Assembler.])
3512       fi
3513       if test x"$with_multilib_list" = xdefault; then
3514         TM_MULTILIB_CONFIG=lp64
3515       else
3516         aarch64_multilibs=`echo $with_multilib_list | sed -e 's/,/ /g'`
3517         for aarch64_multilib in ${aarch64_multilibs}; do
3518           case ${aarch64_multilib} in
3519             ilp32)
3520               AC_MSG_ERROR([Assembler does not support -mabi=ilp32.\
3521                             Upgrade the Assembler.])
3522               ;;
3523             *)
3524               ;;
3525           esac
3526         done
3527       fi
3528     fi
3529     # Enable default workaround for AArch64 Cortex-A53 erratum 835769.
3530     AC_ARG_ENABLE(fix-cortex-a53-835769,
3531     [
3532 AS_HELP_STRING([--enable-fix-cortex-a53-835769],
3533         [enable workaround for AArch64 Cortex-A53 erratum 835769 by default])
3534 AS_HELP_STRING([--disable-fix-cortex-a53-835769],
3535         [disable workaround for AArch64 Cortex-A53 erratum 835769 by default])
3536     ],
3537       [
3538         case $enableval in
3539           yes)
3540             tm_defines="${tm_defines} TARGET_FIX_ERR_A53_835769_DEFAULT=1"
3541             ;;
3542           no)
3543             ;;
3544           *)
3545             AC_MSG_ERROR(['$enableval' is an invalid value for --enable-fix-cortex-a53-835769.\
3546   Valid choices are 'yes' and 'no'.])
3547             ;;
3548
3549         esac
3550       ],
3551     [])
3552     ;;
3553
3554   # All TARGET_ABI_OSF targets.
3555   alpha*-*-linux* | alpha*-*-*bsd*)
3556     gcc_GAS_CHECK_FEATURE([explicit relocation support],
3557         gcc_cv_as_alpha_explicit_relocs, [2,12,0],,
3558 [       .set nomacro
3559         .text
3560         extbl   $3, $2, $3      !lituse_bytoff!1
3561         ldq     $2, a($29)      !literal!1
3562         ldq     $4, b($29)      !literal!2
3563         ldq_u   $3, 0($2)       !lituse_base!1
3564         ldq     $27, f($29)     !literal!5
3565         jsr     $26, ($27), f   !lituse_jsr!5
3566         ldah    $29, 0($26)     !gpdisp!3
3567         lda     $0, c($29)      !gprel
3568         ldah    $1, d($29)      !gprelhigh
3569         lda     $1, d($1)       !gprellow
3570         lda     $29, 0($29)     !gpdisp!3],,
3571     [AC_DEFINE(HAVE_AS_EXPLICIT_RELOCS, 1,
3572   [Define if your assembler supports explicit relocations.])])
3573     gcc_GAS_CHECK_FEATURE([jsrdirect relocation support],
3574         gcc_cv_as_alpha_jsrdirect_relocs, [2,16,90],,
3575 [       .set nomacro
3576         .text
3577         ldq     $27, a($29)     !literal!1
3578         jsr     $26, ($27), a   !lituse_jsrdirect!1],,
3579     [AC_DEFINE(HAVE_AS_JSRDIRECT_RELOCS, 1,
3580   [Define if your assembler supports the lituse_jsrdirect relocation.])])
3581     ;;
3582
3583   cris-*-*)
3584     gcc_GAS_CHECK_FEATURE([-no-mul-bug-abort option],
3585       gcc_cv_as_cris_no_mul_bug,[2,15,91],
3586       [-no-mul-bug-abort], [.text],,
3587       [AC_DEFINE(HAVE_AS_NO_MUL_BUG_ABORT_OPTION, 1,
3588                 [Define if your assembler supports the -no-mul-bug-abort option.])])
3589     ;;
3590
3591   sparc*-*-*)
3592     gcc_GAS_CHECK_FEATURE([.register], gcc_cv_as_sparc_register_op,,,
3593       [.register %g2, #scratch],,
3594       [AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
3595                 [Define if your assembler supports .register.])])
3596
3597     gcc_GAS_CHECK_FEATURE([@%:@nobits], gcc_cv_as_sparc_nobits,,,
3598       [.section "nobits",#alloc,#write,#nobits
3599        .section "progbits",#alloc,#write,#progbits])
3600     AC_DEFINE_UNQUOTED(HAVE_AS_SPARC_NOBITS,
3601       [`if test $gcc_cv_as_sparc_nobits = yes; then echo 1; else echo 0; fi`],
3602       [Define to 1 if your assembler supports #nobits, 0 otherwise.])
3603
3604     gcc_GAS_CHECK_FEATURE([-relax option], gcc_cv_as_sparc_relax,,
3605       [-relax], [.text],,
3606       [AC_DEFINE(HAVE_AS_RELAX_OPTION, 1,
3607                 [Define if your assembler supports -relax option.])])
3608
3609     gcc_GAS_CHECK_FEATURE([GOTDATA_OP relocs],
3610       gcc_cv_as_sparc_gotdata_op,,
3611       [-K PIC],
3612 [.text
3613 .align 4
3614 foo:
3615         nop
3616 bar:
3617         sethi %gdop_hix22(foo), %g1
3618         xor    %g1, %gdop_lox10(foo), %g1
3619         ld    [[%l7 + %g1]], %g2, %gdop(foo)],
3620       [if test x$gcc_cv_ld != x \
3621        && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3622          if test x$gcc_cv_objdump != x; then
3623            if $gcc_cv_objdump -s -j .text conftest 2> /dev/null \
3624               | grep ' 03000004 82186004 c405c001'> /dev/null 2>&1; then
3625                gcc_cv_as_sparc_gotdata_op=no
3626            else
3627                gcc_cv_as_sparc_gotdata_op=yes
3628            fi
3629          fi
3630        fi
3631        rm -f conftest],
3632       [AC_DEFINE(HAVE_AS_SPARC_GOTDATA_OP, 1,
3633                 [Define if your assembler and linker support GOTDATA_OP relocs.])])
3634
3635     gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs],
3636       gcc_cv_as_sparc_ua_pcrel,,
3637       [-K PIC],
3638 [.text
3639 foo:
3640         nop
3641 .data
3642 .align 4
3643 .byte 0
3644 .uaword %r_disp32(foo)],
3645       [if test x$gcc_cv_ld != x \
3646        && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3647          gcc_cv_as_sparc_ua_pcrel=yes
3648        fi
3649        rm -f conftest],
3650       [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
3651                 [Define if your assembler and linker support unaligned PC relative relocs.])
3652
3653       gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs against hidden symbols],
3654         gcc_cv_as_sparc_ua_pcrel_hidden,,
3655         [-K PIC],
3656 [.data
3657 .align 4
3658 .byte 0x31
3659 .uaword %r_disp32(foo)
3660 .byte 0x32, 0x33, 0x34
3661 .global foo
3662 .hidden foo
3663 foo:
3664 .skip 4],
3665         [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
3666          && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1 \
3667          && $gcc_cv_objdump -s -j .data conftest 2> /dev/null \
3668             | grep ' 31000000 07323334' > /dev/null 2>&1; then
3669             if $gcc_cv_objdump -R conftest 2> /dev/null \
3670                | grep 'DISP32' > /dev/null 2>&1; then
3671                 :
3672             else
3673                 gcc_cv_as_sparc_ua_pcrel_hidden=yes
3674             fi
3675          fi
3676          rm -f conftest],
3677          [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL_HIDDEN, 1,
3678                    [Define if your assembler and linker support unaligned PC relative relocs against hidden symbols.])])
3679     ]) # unaligned pcrel relocs
3680
3681     gcc_GAS_CHECK_FEATURE([offsetable %lo()],
3682       gcc_cv_as_sparc_offsetable_lo10,,
3683       [-xarch=v9],
3684 [.text
3685         or %g1, %lo(ab) + 12, %g1
3686         or %g1, %lo(ab + 12), %g1],
3687       [if test x$gcc_cv_objdump != x \
3688        && $gcc_cv_objdump -s -j .text conftest.o 2> /dev/null \
3689           | grep ' 82106000 82106000' > /dev/null 2>&1; then
3690          gcc_cv_as_sparc_offsetable_lo10=yes
3691        fi],
3692        [AC_DEFINE(HAVE_AS_OFFSETABLE_LO10, 1,
3693                  [Define if your assembler supports offsetable %lo().])])
3694
3695     gcc_GAS_CHECK_FEATURE([FMAF, HPC, and VIS 3.0 instructions],
3696       gcc_cv_as_sparc_fmaf,,
3697       [-xarch=v9d],
3698       [.text
3699        .register %g2, #scratch
3700        .register %g3, #scratch
3701        .align 4
3702        fmaddd %f0, %f2, %f4, %f6
3703        addxccc %g1, %g2, %g3
3704        fsrl32 %f2, %f4, %f8
3705        fnaddd %f10, %f12, %f14],,
3706       [AC_DEFINE(HAVE_AS_FMAF_HPC_VIS3, 1,
3707                 [Define if your assembler supports FMAF, HPC, and VIS 3.0 instructions.])])
3708
3709     gcc_GAS_CHECK_FEATURE([SPARC4 instructions],
3710       gcc_cv_as_sparc_sparc4,,
3711       [-xarch=sparc4],
3712       [.text
3713        .register %g2, #scratch
3714        .register %g3, #scratch
3715        .align 4
3716        cxbe %g2, %g3, 1f
3717 1:     cwbneg %g2, %g3, 1f
3718 1:     sha1
3719        md5
3720        aes_kexpand0 %f4, %f6, %f8
3721        des_round %f38, %f40, %f42, %f44
3722        camellia_f %f54, %f56, %f58, %f60
3723        kasumi_fi_xor %f46, %f48, %f50, %f52],,
3724       [AC_DEFINE(HAVE_AS_SPARC4, 1,
3725                 [Define if your assembler supports SPARC4 instructions.])])
3726
3727     gcc_GAS_CHECK_FEATURE([LEON instructions],
3728       gcc_cv_as_sparc_leon,,
3729       [-Aleon],
3730       [.text
3731        .register %g2, #scratch
3732        .register %g3, #scratch
3733        .align 4
3734        smac %g2, %g3, %g1
3735        umac %g2, %g3, %g1
3736        casa [[%g2]] 0xb, %g3, %g1],,
3737       [AC_DEFINE(HAVE_AS_LEON, 1,
3738                 [Define if your assembler supports LEON instructions.])])
3739     ;;
3740
3741 changequote(,)dnl
3742   i[34567]86-*-* | x86_64-*-*)
3743 changequote([,])dnl
3744     case $target_os in
3745       cygwin*)
3746         # Full C++ conformance when using a shared libstdc++-v3 requires some
3747         # support from the Cygwin DLL, which in more recent versions exports
3748         # wrappers to aid in interposing and redirecting operators new, delete,
3749         # etc., as per n2800 #17.6.4.6 [replacement.functions].  Check if we
3750         # are configuring for a version of Cygwin that exports the wrappers.
3751         if test x$host = x$target && test x$host_cpu = xi686; then
3752           AC_CHECK_FUNC([__wrap__Znaj],[gcc_ac_cygwin_dll_wrappers=yes],[gcc_ac_cygwin_dll_wrappers=no])
3753         else
3754           # Can't check presence of libc functions during cross-compile, so
3755           # we just have to assume we're building for an up-to-date target.
3756           gcc_ac_cygwin_dll_wrappers=yes
3757         fi
3758         AC_DEFINE_UNQUOTED(USE_CYGWIN_LIBSTDCXX_WRAPPERS,
3759           [`if test $gcc_ac_cygwin_dll_wrappers = yes; then echo 1; else echo 0; fi`],
3760           [Define if you want to generate code by default that assumes that the
3761            Cygwin DLL exports wrappers to support libstdc++ function replacement.])
3762     esac
3763     case $target_os in
3764       cygwin* | pe | mingw32* | interix*)
3765         # Recent binutils allows the three-operand form of ".comm" on PE.  This
3766         # definition is used unconditionally to initialise the default state of
3767         # the target option variable that governs usage of the feature.
3768         gcc_GAS_CHECK_FEATURE([.comm with alignment], gcc_cv_as_comm_has_align,
3769          [2,19,52],,[.comm foo,1,32])
3770         AC_DEFINE_UNQUOTED(HAVE_GAS_ALIGNED_COMM,
3771           [`if test $gcc_cv_as_comm_has_align = yes; then echo 1; else echo 0; fi`],
3772           [Define if your assembler supports specifying the alignment
3773            of objects allocated using the GAS .comm command.])
3774         # Used for DWARF 2 in PE
3775         gcc_GAS_CHECK_FEATURE([.secrel32 relocs],
3776           gcc_cv_as_ix86_pe_secrel32,
3777           [2,15,91],,
3778 [.text
3779 foo:    nop
3780 .data
3781         .secrel32 foo],
3782           [if test x$gcc_cv_ld != x \
3783            && $gcc_cv_ld -o conftest conftest.o > /dev/null 2>&1; then
3784              gcc_cv_as_ix86_pe_secrel32=yes
3785            fi
3786            rm -f conftest],
3787           [AC_DEFINE(HAVE_GAS_PE_SECREL32_RELOC, 1,
3788             [Define if your assembler and linker support 32-bit section relative relocs via '.secrel32 label'.])])
3789         # Test if the assembler supports the extended form of the .section
3790         # directive that specifies section alignment.  LTO support uses this,
3791         # but normally only after installation, so we warn but don't fail the
3792         # configure if LTO is enabled but the assembler does not support it.
3793         gcc_GAS_CHECK_FEATURE([.section with alignment], gcc_cv_as_section_has_align,
3794           [2,20,1],-fatal-warnings,[.section lto_test,"dr0"])
3795         if test x$gcc_cv_as_section_has_align != xyes; then
3796           case ",$enable_languages," in
3797             *,lto,*)
3798               AC_MSG_WARN([LTO for $target requires binutils >= 2.20.1, but version found appears insufficient; LTO will not work until binutils is upgraded.])
3799               ;;
3800           esac
3801         fi
3802         # Test if the assembler supports the section flag 'e' for specifying
3803         # an excluded section.
3804         gcc_GAS_CHECK_FEATURE([.section with e], gcc_cv_as_section_has_e,
3805           [2,22,51],,
3806 [.section foo1,"e"
3807 .byte 0,0,0,0])
3808         AC_DEFINE_UNQUOTED(HAVE_GAS_SECTION_EXCLUDE,
3809           [`if test $gcc_cv_as_section_has_e = yes; then echo 1; else echo 0; fi`],
3810           [Define if your assembler supports specifying the section flag e.])
3811         ;;
3812     esac
3813
3814     gcc_GAS_CHECK_FEATURE([filds and fists mnemonics],
3815        gcc_cv_as_ix86_filds,,,
3816        [filds mem; fists mem],,
3817        [AC_DEFINE(HAVE_AS_IX86_FILDS, 1,
3818          [Define if your assembler uses filds and fists mnemonics.])])
3819
3820     gcc_GAS_CHECK_FEATURE([fildq and fistpq mnemonics],
3821        gcc_cv_as_ix86_fildq,,,
3822        [fildq mem; fistpq mem],,
3823        [AC_DEFINE(HAVE_AS_IX86_FILDQ, 1,
3824          [Define if your assembler uses fildq and fistq mnemonics.])])
3825
3826     gcc_GAS_CHECK_FEATURE([cmov syntax],
3827       gcc_cv_as_ix86_cmov_sun_syntax,,,
3828       [cmovl.l %edx, %eax],,
3829       [AC_DEFINE(HAVE_AS_IX86_CMOV_SUN_SYNTAX, 1,
3830         [Define if your assembler supports the Sun syntax for cmov.])])
3831
3832     gcc_GAS_CHECK_FEATURE([ffreep mnemonic],
3833       gcc_cv_as_ix86_ffreep,,,
3834       [ffreep %st(1)],,
3835       [AC_DEFINE(HAVE_AS_IX86_FFREEP, 1,
3836         [Define if your assembler supports the ffreep mnemonic.])])
3837
3838     gcc_GAS_CHECK_FEATURE([.quad directive],
3839       gcc_cv_as_ix86_quad,,,
3840       [.quad 0],,
3841       [AC_DEFINE(HAVE_AS_IX86_QUAD, 1,
3842         [Define if your assembler supports the .quad directive.])])
3843
3844     gcc_GAS_CHECK_FEATURE([sahf mnemonic],
3845       gcc_cv_as_ix86_sahf,,,
3846       [.code64
3847        sahf],,
3848       [AC_DEFINE(HAVE_AS_IX86_SAHF, 1,
3849         [Define if your assembler supports the sahf mnemonic in 64bit mode.])])
3850
3851     gcc_GAS_CHECK_FEATURE([interunit movq mnemonic],
3852       gcc_cv_as_ix86_interunit_movq,,,
3853       [.code64
3854        movq %mm0, %rax
3855        movq %rax, %xmm0])
3856     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_INTERUNIT_MOVQ,
3857       [`if test $gcc_cv_as_ix86_interunit_movq = yes; then echo 1; else echo 0; fi`],
3858       [Define if your assembler supports interunit movq mnemonic.])
3859
3860     gcc_GAS_CHECK_FEATURE([hle prefixes],
3861       gcc_cv_as_ix86_hle,,,
3862       [lock xacquire cmpxchg %esi, (%ecx)],,
3863       [AC_DEFINE(HAVE_AS_IX86_HLE, 1,
3864         [Define if your assembler supports HLE prefixes.])])
3865
3866     gcc_GAS_CHECK_FEATURE([swap suffix],
3867       gcc_cv_as_ix86_swap,,,
3868       [movl.s %esp, %ebp],,
3869       [AC_DEFINE(HAVE_AS_IX86_SWAP, 1,
3870         [Define if your assembler supports the swap suffix.])])
3871
3872     gcc_GAS_CHECK_FEATURE([different section symbol subtraction],
3873       gcc_cv_as_ix86_diff_sect_delta,,,
3874       [.section .rodata
3875 .L1:
3876         .long .L2-.L1
3877         .long .L3-.L1
3878         .text
3879 .L3:    nop
3880 .L2:    nop],,
3881       [AC_DEFINE(HAVE_AS_IX86_DIFF_SECT_DELTA, 1,
3882         [Define if your assembler supports the subtraction of symbols in different sections.])])
3883
3884     # These two are used unconditionally by i386.[ch]; it is to be defined
3885     # to 1 if the feature is present, 0 otherwise.
3886     as_ix86_gotoff_in_data_opt=
3887     if test x$gas = xyes; then
3888       as_ix86_gotoff_in_data_opt="--32"
3889     fi
3890     gcc_GAS_CHECK_FEATURE([GOTOFF in data],
3891       gcc_cv_as_ix86_gotoff_in_data, [2,11,0],
3892       [$as_ix86_gotoff_in_data_opt],
3893 [       .text
3894 .L0:
3895         nop
3896         .data
3897         .long .L0@GOTOFF])
3898     AC_DEFINE_UNQUOTED(HAVE_AS_GOTOFF_IN_DATA,
3899       [`if test $gcc_cv_as_ix86_gotoff_in_data = yes; then echo 1; else echo 0; fi`],
3900       [Define true if the assembler supports '.long foo@GOTOFF'.])
3901
3902     gcc_GAS_CHECK_FEATURE([rep and lock prefix],
3903         gcc_cv_as_ix86_rep_lock_prefix,,,
3904         [rep movsl
3905          rep ret
3906          rep nop
3907          rep bsf %ecx, %eax
3908          rep bsr %ecx, %eax
3909          lock addl %edi, (%eax,%esi)
3910          lock orl $0, (%esp)],,
3911         [AC_DEFINE(HAVE_AS_IX86_REP_LOCK_PREFIX, 1,
3912           [Define if the assembler supports 'rep <insn>, lock <insn>'.])])
3913
3914     gcc_GAS_CHECK_FEATURE([ud2 mnemonic],
3915         gcc_cv_as_ix86_ud2,,,
3916         [ud2],,
3917       [AC_DEFINE(HAVE_AS_IX86_UD2, 1,
3918         [Define if your assembler supports the 'ud2' mnemonic.])])
3919
3920     gcc_GAS_CHECK_FEATURE([R_386_TLS_GD_PLT reloc],
3921         gcc_cv_as_ix86_tlsgdplt,,,
3922         [call    tls_gd@tlsgdplt],
3923         [if test x$gcc_cv_ld != x \
3924          && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3925            gcc_cv_as_ix86_tlsgdplt=yes
3926          fi
3927          rm -f conftest],
3928       [AC_DEFINE(HAVE_AS_IX86_TLSGDPLT, 1,
3929         [Define if your assembler and linker support @tlsgdplt.])])
3930
3931     conftest_s='
3932         .section .tdata,"aw'$tls_section_flag'",@progbits
3933 tls_ld:
3934         .section .text,"ax",@progbits
3935          call    tls_ld@tlsldmplt'
3936     gcc_GAS_CHECK_FEATURE([R_386_TLS_LDM_PLT reloc],
3937         gcc_cv_as_ix86_tlsldmplt,,,
3938         [$conftest_s],
3939         [if test x$gcc_cv_ld != x \
3940          && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3941            gcc_cv_as_ix86_tlsldmplt=yes
3942          fi
3943          rm -f conftest])
3944     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_TLSLDMPLT,
3945       [`if test $gcc_cv_as_ix86_tlsldmplt = yes; then echo 1; else echo 0; fi`],
3946       [Define to 1 if your assembler and linker support @tlsldmplt.])
3947
3948     # Enforce 32-bit output with gas and gld.
3949     if test x$gas = xyes; then
3950       as_ix86_tls_ldm_opt="--32"
3951     fi
3952     if echo "$ld_ver" | grep GNU > /dev/null; then
3953       if $gcc_cv_ld -V 2>/dev/null | grep elf_i386_sol2 > /dev/null; then
3954         ld_ix86_tls_ldm_opt="-melf_i386_sol2"
3955       else
3956         ld_ix86_tls_ldm_opt="-melf_i386"
3957       fi
3958     fi
3959     conftest_s='
3960         .section .text,"ax",@progbits
3961         .globl  _start
3962         .type   _start, @function
3963 _start:
3964         leal    value@tlsldm(%ebx), %eax
3965         call    ___tls_get_addr@plt
3966
3967         .section .tdata,"aw'$tls_section_flag'",@progbits
3968         .type   value, @object
3969 value:'
3970     gcc_GAS_CHECK_FEATURE([R_386_TLS_LDM reloc],
3971         gcc_cv_as_ix86_tlsldm,,
3972         [$as_ix86_tls_ldm_opt],
3973         [$conftest_s],
3974         [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
3975             && $gcc_cv_ld $ld_ix86_tls_ldm_opt -o conftest conftest.o $ld_tls_libs -lc > /dev/null 2>&1; then
3976            if $gcc_cv_objdump -d conftest 2>/dev/null | grep nop > /dev/null \
3977               || dis conftest 2>/dev/null | grep nop > /dev/null; then
3978              gcc_cv_as_ix86_tlsldm=yes
3979            fi
3980          fi
3981          rm -f conftest])
3982     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_TLSLDM,
3983       [`if test $gcc_cv_as_ix86_tlsldm = yes; then echo 1; else echo 0; fi`],
3984       [Define to 1 if your assembler and linker support @tlsldm.])
3985
3986     ;;
3987
3988   ia64*-*-*)
3989     gcc_GAS_CHECK_FEATURE([ltoffx and ldxmov relocs],
3990         gcc_cv_as_ia64_ltoffx_ldxmov_relocs, [2,14,0],,
3991 [       .text
3992         addl r15 = @ltoffx(x#), gp
3993         ;;
3994         ld8.mov r16 = [[r15]], x#],,
3995     [AC_DEFINE(HAVE_AS_LTOFFX_LDXMOV_RELOCS, 1,
3996           [Define if your assembler supports ltoffx and ldxmov relocations.])])
3997
3998     ;;
3999
4000   powerpc*-*-*)
4001     case $target in
4002       *-*-aix*) conftest_s='    .machine "pwr5"
4003         .csect .text[[PR]]
4004         mfcr 3,128';;
4005       *-*-darwin*)
4006         gcc_GAS_CHECK_FEATURE([.machine directive support],
4007           gcc_cv_as_machine_directive,,,
4008           [     .machine ppc7400])
4009         if test x$gcc_cv_as_machine_directive != xyes; then
4010           echo "*** This target requires an assembler supporting \".machine\"" >&2
4011           echo you can get it from: ftp://gcc.gnu.org/pub/gcc/infrastructure/cctools-528.5.dmg >&2
4012           test x$build = x$target && exit 1
4013         fi
4014         conftest_s='    .text
4015         mfcr r3,128';;
4016       *) conftest_s='   .machine power4
4017         .text
4018         mfcr 3,128';;
4019     esac
4020
4021     gcc_GAS_CHECK_FEATURE([mfcr field support],
4022       gcc_cv_as_powerpc_mfcrf, [2,14,0],,
4023       [$conftest_s],,
4024       [AC_DEFINE(HAVE_AS_MFCRF, 1,
4025           [Define if your assembler supports mfcr field.])])
4026
4027     case $target in
4028       *-*-aix*) conftest_s='    .machine "pwr5"
4029         .csect .text[[PR]]
4030         popcntb 3,3';;
4031       *) conftest_s='   .machine power5
4032         .text
4033         popcntb 3,3';;
4034     esac
4035
4036     gcc_GAS_CHECK_FEATURE([popcntb support],
4037       gcc_cv_as_powerpc_popcntb, [2,17,0],,
4038       [$conftest_s],,
4039       [AC_DEFINE(HAVE_AS_POPCNTB, 1,
4040           [Define if your assembler supports popcntb field.])])
4041
4042     case $target in
4043       *-*-aix*) conftest_s='    .machine "pwr5x"
4044         .csect .text[[PR]]
4045         frin 1,1';;
4046       *) conftest_s='   .machine power5
4047         .text
4048         frin 1,1';;
4049     esac
4050
4051     gcc_GAS_CHECK_FEATURE([fp round support],
4052       gcc_cv_as_powerpc_fprnd, [2,17,0],,
4053       [$conftest_s],,
4054       [AC_DEFINE(HAVE_AS_FPRND, 1,
4055           [Define if your assembler supports fprnd.])])
4056
4057     case $target in
4058       *-*-aix*) conftest_s='    .machine "pwr6"
4059         .csect .text[[PR]]
4060         mffgpr 1,3';;
4061       *) conftest_s='   .machine power6
4062         .text
4063         mffgpr 1,3';;
4064     esac
4065
4066     gcc_GAS_CHECK_FEATURE([move fp gpr support],
4067       gcc_cv_as_powerpc_mfpgpr, [2,19,2],,
4068       [$conftest_s],,
4069       [AC_DEFINE(HAVE_AS_MFPGPR, 1,
4070           [Define if your assembler supports mffgpr and mftgpr.])])
4071
4072     case $target in
4073       *-*-aix*) conftest_s='    .csect .text[[PR]]
4074 LCF..0:
4075         addis 11,30,_GLOBAL_OFFSET_TABLE_-LCF..0@ha';;
4076       *-*-darwin*)
4077         conftest_s='    .text
4078 LCF0:
4079         addis r11,r30,_GLOBAL_OFFSET_TABLE_-LCF0@ha';;
4080       *) conftest_s='   .text
4081 .LCF0:
4082         addis 11,30,_GLOBAL_OFFSET_TABLE_-.LCF0@ha';;
4083     esac
4084
4085     gcc_GAS_CHECK_FEATURE([rel16 relocs],
4086       gcc_cv_as_powerpc_rel16, [2,17,0], -a32,
4087       [$conftest_s],,
4088       [AC_DEFINE(HAVE_AS_REL16, 1,
4089           [Define if your assembler supports R_PPC_REL16 relocs.])])
4090
4091     case $target in
4092       *-*-aix*) conftest_s='    .machine "pwr6"
4093         .csect .text[[PR]]
4094         cmpb 3,4,5';;
4095       *) conftest_s='   .machine power6
4096         .text
4097         cmpb 3,4,5';;
4098     esac
4099
4100     gcc_GAS_CHECK_FEATURE([compare bytes support],
4101       gcc_cv_as_powerpc_cmpb, [2,19,2], -a32,
4102       [$conftest_s],,
4103       [AC_DEFINE(HAVE_AS_CMPB, 1,
4104           [Define if your assembler supports cmpb.])])
4105
4106     case $target in
4107       *-*-aix*) conftest_s='    .machine "pwr6"
4108         .csect .text[[PR]]
4109         dadd 1,2,3';;
4110       *) conftest_s='   .machine power6
4111         .text
4112         dadd 1,2,3';;
4113     esac
4114
4115     gcc_GAS_CHECK_FEATURE([decimal float support],
4116       gcc_cv_as_powerpc_dfp, [2,19,2], -a32,
4117       [$conftest_s],,
4118       [AC_DEFINE(HAVE_AS_DFP, 1,
4119           [Define if your assembler supports DFP instructions.])])
4120
4121     case $target in
4122       *-*-aix*) conftest_s='    .machine "pwr7"
4123         .csect .text[[PR]]
4124         lxvd2x 1,2,3';;
4125       *) conftest_s='   .machine power7
4126         .text
4127         lxvd2x 1,2,3';;
4128     esac
4129
4130     gcc_GAS_CHECK_FEATURE([vector-scalar support],
4131       gcc_cv_as_powerpc_vsx, [2,19,2], -a32,
4132       [$conftest_s],,
4133       [AC_DEFINE(HAVE_AS_VSX, 1,
4134           [Define if your assembler supports VSX instructions.])])
4135
4136     case $target in
4137       *-*-aix*) conftest_s='    .machine "pwr7"
4138         .csect .text[[PR]]
4139         popcntd 3,3';;
4140       *) conftest_s='   .machine power7
4141         .text
4142         popcntd 3,3';;
4143     esac
4144
4145     gcc_GAS_CHECK_FEATURE([popcntd support],
4146       gcc_cv_as_powerpc_popcntd, [2,19,2], -a32,
4147       [$conftest_s],,
4148       [AC_DEFINE(HAVE_AS_POPCNTD, 1,
4149           [Define if your assembler supports POPCNTD instructions.])])
4150
4151     case $target in
4152       *-*-aix*) conftest_s='    .machine "pwr8"
4153         .csect .text[[PR]]';;
4154       *) conftest_s='   .machine power8
4155         .text';;
4156     esac
4157
4158     gcc_GAS_CHECK_FEATURE([power8 support],
4159       gcc_cv_as_powerpc_power8, [2,19,2], -a32,
4160       [$conftest_s],,
4161       [AC_DEFINE(HAVE_AS_POWER8, 1,
4162           [Define if your assembler supports POWER8 instructions.])])
4163
4164     case $target in
4165       *-*-aix*) conftest_s='    .csect .text[[PR]]
4166         lwsync';;
4167       *) conftest_s='   .text
4168         lwsync';;
4169     esac
4170
4171     gcc_GAS_CHECK_FEATURE([lwsync support],
4172       gcc_cv_as_powerpc_lwsync, [2,19,2], -a32,
4173       [$conftest_s],,
4174       [AC_DEFINE(HAVE_AS_LWSYNC, 1,
4175           [Define if your assembler supports LWSYNC instructions.])])
4176
4177     case $target in
4178       *-*-aix*) conftest_s='    .machine "476"
4179         .csect .text[[PR]]
4180         dci 0';;
4181       *) conftest_s='   .machine "476"
4182         .text
4183         dci 0';;
4184     esac
4185
4186     gcc_GAS_CHECK_FEATURE([data cache invalidate support],
4187       gcc_cv_as_powerpc_dci, [9,99,0], -a32,
4188       [$conftest_s],,
4189       [AC_DEFINE(HAVE_AS_DCI, 1,
4190           [Define if your assembler supports the DCI/ICI instructions.])])
4191
4192     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
4193       gcc_cv_as_powerpc_gnu_attribute, [2,18,0],,
4194       [.gnu_attribute 4,1],,
4195       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
4196           [Define if your assembler supports .gnu_attribute.])])
4197
4198     gcc_GAS_CHECK_FEATURE([tls marker support],
4199       gcc_cv_as_powerpc_tls_markers, [2,20,0],,
4200       [ bl __tls_get_addr(x@tlsgd)],,
4201       [AC_DEFINE(HAVE_AS_TLS_MARKERS, 1,
4202           [Define if your assembler supports arg info for __tls_get_addr.])])
4203
4204     case $target in
4205       *-*-aix*)
4206         gcc_GAS_CHECK_FEATURE([.ref support],
4207           gcc_cv_as_aix_ref, [2,21,0],,
4208           [     .csect stuff[[rw]]
4209              stuff:
4210                 .long 1
4211                 .extern sym
4212                 .ref sym
4213           ],,
4214           [AC_DEFINE(HAVE_AS_REF, 1,
4215             [Define if your assembler supports .ref])])
4216         ;;
4217     esac
4218     ;;
4219
4220   mips*-*-*)
4221     gcc_GAS_CHECK_FEATURE([explicit relocation support],
4222       gcc_cv_as_mips_explicit_relocs, [2,14,0],,
4223 [       lw $4,%gp_rel(foo)($4)],,
4224       [if test x$target_cpu_default = x
4225        then target_cpu_default=MASK_EXPLICIT_RELOCS
4226        else target_cpu_default="($target_cpu_default)|MASK_EXPLICIT_RELOCS"
4227        fi])
4228     gcc_GAS_CHECK_FEATURE([-mno-shared support],
4229       gcc_cv_as_mips_no_shared, [2,16,0], [-mno-shared], [nop],,
4230       [AC_DEFINE(HAVE_AS_NO_SHARED, 1,
4231                  [Define if the assembler understands -mno-shared.])])
4232
4233     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
4234       gcc_cv_as_mips_gnu_attribute, [2,18,0],,
4235       [.gnu_attribute 4,1],,
4236       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
4237           [Define if your assembler supports .gnu_attribute.])])
4238
4239     gcc_GAS_CHECK_FEATURE([.micromips support],
4240       gcc_cv_as_micromips_support,,[--fatal-warnings],
4241       [.set micromips],,
4242       [AC_DEFINE(HAVE_GAS_MICROMIPS, 1,
4243           [Define if your assembler supports the .set micromips directive])])
4244
4245     gcc_GAS_CHECK_FEATURE([.dtprelword support],
4246       gcc_cv_as_mips_dtprelword, [2,18,0],,
4247       [.section .tdata,"awT",@progbits
4248 x:
4249         .word 2
4250         .text
4251         .dtprelword x+0x8000],,
4252       [AC_DEFINE(HAVE_AS_DTPRELWORD, 1,
4253           [Define if your assembler supports .dtprelword.])])
4254
4255     gcc_GAS_CHECK_FEATURE([DSPR1 mult with four accumulators support],
4256       gcc_cv_as_mips_dspr1_mult,,,
4257 [       .set    mips32r2
4258         .set    nodspr2
4259         .set    dsp
4260         madd    $ac3,$4,$5
4261         maddu   $ac3,$4,$5
4262         msub    $ac3,$4,$5
4263         msubu   $ac3,$4,$5
4264         mult    $ac3,$4,$5
4265         multu   $ac3,$4,$5],,
4266       [AC_DEFINE(HAVE_AS_DSPR1_MULT, 1,
4267           [Define if your assembler supports DSPR1 mult.])])
4268
4269     AC_MSG_CHECKING(assembler and linker for explicit JALR relocation)
4270     gcc_cv_as_ld_jalr_reloc=no
4271     if test $gcc_cv_as_mips_explicit_relocs = yes; then
4272       if test $in_tree_ld = yes ; then
4273         if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 20 -o "$gcc_cv_gld_major_version" -gt 2 \
4274            && test $in_tree_ld_is_elf = yes; then
4275           gcc_cv_as_ld_jalr_reloc=yes
4276         fi
4277       elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x; then
4278         echo '  .ent x' > conftest.s
4279         echo 'x:        lw $2,%got_disp(y)($3)' >> conftest.s
4280         echo '  lw $25,%call16(y)($28)' >> conftest.s
4281         echo '  .reloc  1f,R_MIPS_JALR,y' >> conftest.s
4282         echo '1:        jalr $25' >> conftest.s
4283         echo '  .reloc  1f,R_MIPS_JALR,x' >> conftest.s
4284         echo '1:        jalr $25' >> conftest.s
4285         echo '  .end x' >> conftest.s
4286         if $gcc_cv_as -o conftest.o conftest.s >/dev/null 2>&AS_MESSAGE_LOG_FD \
4287            && $gcc_cv_ld -shared -o conftest.so conftest.o >/dev/null 2>&AS_MESSAGE_LOG_FD; then
4288           if $gcc_cv_objdump -d conftest.so | grep jalr >/dev/null 2>&1 \
4289              && $gcc_cv_objdump -d conftest.so | grep "bal.*<x>" >/dev/null 2>&1; then
4290             gcc_cv_as_ld_jalr_reloc=yes
4291           fi
4292         fi
4293         rm -f conftest.*
4294       fi
4295     fi
4296     if test $gcc_cv_as_ld_jalr_reloc = yes; then
4297       if test x$target_cpu_default = x; then
4298         target_cpu_default=MASK_RELAX_PIC_CALLS
4299       else
4300         target_cpu_default="($target_cpu_default)|MASK_RELAX_PIC_CALLS"
4301       fi
4302     fi
4303     AC_MSG_RESULT($gcc_cv_as_ld_jalr_reloc)
4304
4305     AC_CACHE_CHECK([linker for .eh_frame personality relaxation],
4306       [gcc_cv_ld_mips_personality_relaxation],
4307       [gcc_cv_ld_mips_personality_relaxation=no
4308        if test $in_tree_ld = yes ; then
4309          if test "$gcc_cv_gld_major_version" -eq 2 \
4310                  -a "$gcc_cv_gld_minor_version" -ge 21 \
4311                  -o "$gcc_cv_gld_major_version" -gt 2; then
4312            gcc_cv_ld_mips_personality_relaxation=yes
4313          fi
4314        elif test x$gcc_cv_as != x \
4315                  -a x$gcc_cv_ld != x \
4316                  -a x$gcc_cv_readelf != x ; then
4317          cat > conftest.s <<EOF
4318         .cfi_startproc
4319         .cfi_personality 0x80,indirect_ptr
4320         .ent test
4321 test:
4322         nop
4323         .end test
4324         .cfi_endproc
4325
4326         .section .data,"aw",@progbits
4327 indirect_ptr:
4328         .dc.a personality
4329 EOF
4330          if $gcc_cv_as -KPIC -o conftest.o conftest.s > /dev/null 2>&1 \
4331             && $gcc_cv_ld -o conftest conftest.o -shared > /dev/null 2>&1; then
4332            if $gcc_cv_readelf -d conftest 2>&1 \
4333               | grep TEXTREL > /dev/null 2>&1; then
4334              :
4335            elif $gcc_cv_readelf --relocs conftest 2>&1 \
4336                 | grep 'R_MIPS_REL32 *$' > /dev/null 2>&1; then
4337              :
4338            else
4339              gcc_cv_ld_mips_personality_relaxation=yes
4340            fi
4341          fi
4342        fi
4343        rm -f conftest.s conftest.o conftest])
4344     if test x$gcc_cv_ld_mips_personality_relaxation = xyes; then
4345             AC_DEFINE(HAVE_LD_PERSONALITY_RELAXATION, 1,
4346       [Define if your linker can relax absolute .eh_frame personality
4347 pointers into PC-relative form.])
4348     fi
4349
4350     gcc_GAS_CHECK_FEATURE([-mnan= support],
4351       gcc_cv_as_mips_nan,,
4352       [-mnan=2008],,,
4353       [AC_DEFINE(HAVE_AS_NAN, 1,
4354                  [Define if the assembler understands -mnan=.])])
4355     if test x$gcc_cv_as_mips_nan = xno \
4356        && test x$with_nan != x; then
4357       AC_MSG_ERROR(
4358         [Requesting --with-nan= requires assembler support for -mnan=])
4359     fi
4360     ;;
4361 esac
4362
4363 # Mips and HP-UX need the GNU assembler.
4364 # Linux on IA64 might be able to use the Intel assembler.
4365
4366 case "$target" in
4367   mips*-*-* | *-*-hpux* )
4368     if test x$gas_flag = xyes \
4369        || test x"$host" != x"$build" \
4370        || test ! -x "$gcc_cv_as" \
4371        || "$gcc_cv_as" -v < /dev/null 2>&1 | grep GNU > /dev/null; then
4372       :
4373     else
4374       echo "*** This configuration requires the GNU assembler" >&2
4375       exit 1
4376     fi
4377     ;;
4378 esac
4379
4380 # ??? Not all targets support dwarf2 debug_line, even within a version
4381 # of gas.  Moreover, we need to emit a valid instruction to trigger any
4382 # info to the output file.  So, as supported targets are added to gas 2.11,
4383 # add some instruction here to (also) show we expect this might work.
4384 # ??? Once 2.11 is released, probably need to add first known working
4385 # version to the per-target configury.
4386 case "$cpu_type" in
4387   aarch64 | alpha | arm | avr | bfin | cris | i386 | m32c | m68k | microblaze \
4388   | mips | nios2 | pa | rs6000 | score | sparc | spu | tilegx | tilepro \
4389   | xstormy16 | xtensa)
4390     insn="nop"
4391     ;;
4392   ia64 | s390)
4393     insn="nop 0"
4394     ;;
4395   mmix)
4396     insn="swym 0"
4397     ;;
4398 esac
4399 if test x"$insn" != x; then
4400  conftest_s="\
4401         .file 1 \"conftest.s\"
4402         .loc 1 3 0
4403         $insn"
4404  gcc_GAS_CHECK_FEATURE([dwarf2 debug_line support],
4405   gcc_cv_as_dwarf2_debug_line,
4406   [elf,2,11,0],, [$conftest_s],
4407   [if test x$gcc_cv_objdump != x \
4408    && $gcc_cv_objdump -h conftest.o 2> /dev/null \
4409       | grep debug_line > /dev/null 2>&1; then
4410      gcc_cv_as_dwarf2_debug_line=yes
4411    fi])
4412
4413 # The .debug_line file table must be in the exact order that
4414 # we specified the files, since these indices are also used
4415 # by DW_AT_decl_file.  Approximate this test by testing if
4416 # the assembler bitches if the same index is assigned twice.
4417  gcc_GAS_CHECK_FEATURE([buggy dwarf2 .file directive],
4418   gcc_cv_as_dwarf2_file_buggy,,,
4419 [       .file 1 "foo.s"
4420         .file 1 "bar.s"])
4421
4422  if test $gcc_cv_as_dwarf2_debug_line = yes \
4423  && test $gcc_cv_as_dwarf2_file_buggy = no; then
4424         AC_DEFINE(HAVE_AS_DWARF2_DEBUG_LINE, 1,
4425   [Define if your assembler supports dwarf2 .file/.loc directives,
4426    and preserves file table indices exactly as given.])
4427  fi
4428
4429  gcc_GAS_CHECK_FEATURE([--gdwarf2 option],
4430   gcc_cv_as_gdwarf2_flag,
4431   [elf,2,11,0], [--gdwarf2], [$insn],,
4432   [AC_DEFINE(HAVE_AS_GDWARF2_DEBUG_FLAG, 1,
4433 [Define if your assembler supports the --gdwarf2 option.])])
4434
4435  gcc_GAS_CHECK_FEATURE([--gstabs option],
4436   gcc_cv_as_gstabs_flag,
4437   [elf,2,11,0], [--gstabs], [$insn],,
4438   [AC_DEFINE(HAVE_AS_GSTABS_DEBUG_FLAG, 1,
4439 [Define if your assembler supports the --gstabs option.])])
4440
4441  gcc_GAS_CHECK_FEATURE([--debug-prefix-map option],
4442   gcc_cv_as_debug_prefix_map_flag,
4443   [2,18,0], [--debug-prefix-map /a=/b], [$insn],,
4444   [AC_DEFINE(HAVE_AS_DEBUG_PREFIX_MAP, 1,
4445 [Define if your assembler supports the --debug-prefix-map option.])])
4446 fi
4447
4448 gcc_GAS_CHECK_FEATURE([compressed debug sections],
4449   gcc_cv_as_compress_debug,,[--compress-debug-sections],,
4450   [# gas compiled without zlib cannot compress debug sections and warns
4451    # about it, but still exits successfully.  So check for this, too.
4452    if $gcc_cv_as --compress-debug-sections -o conftest.o conftest.s 2>&1 | grep -i warning > /dev/null
4453    then
4454      gcc_cv_as_compress_debug=0
4455    elif $gcc_cv_as --compress-debug-sections -o conftest.o conftest.s > /dev/null 2>&1
4456    then
4457      gcc_cv_as_compress_debug=1
4458      gcc_cv_as_compress_debug_option="--compress-debug-sections"
4459      gcc_cv_as_no_compress_debug_option="--nocompress-debug-sections"
4460    else
4461      gcc_cv_as_compress_debug=0
4462    # FIXME: Future gas versions will support ELF gABI style via
4463    # --compress-debug-sections[=type].
4464    fi])
4465 AC_DEFINE_UNQUOTED(HAVE_AS_COMPRESS_DEBUG, $gcc_cv_as_compress_debug,
4466 [Define to the level of your assembler's compressed debug section support.])
4467 AC_DEFINE_UNQUOTED(AS_COMPRESS_DEBUG_OPTION, "$gcc_cv_as_compress_debug_option",
4468 [Define to the assembler option to enable compressed debug sections.])
4469 AC_DEFINE_UNQUOTED(AS_NO_COMPRESS_DEBUG_OPTION, "$gcc_cv_as_no_compress_debug_option",
4470 [Define to the assembler option to disable compressed debug sections.])
4471
4472 gcc_GAS_CHECK_FEATURE([.lcomm with alignment], gcc_cv_as_lcomm_with_alignment,
4473  ,,
4474 [.lcomm bar,4,16],,
4475 [AC_DEFINE(HAVE_GAS_LCOMM_WITH_ALIGNMENT, 1,
4476   [Define if your assembler supports .lcomm with an alignment field.])])
4477
4478 if test x$with_sysroot = x && test x$host = x$target \
4479    && test "$prefix" != "/usr" && test "x$prefix" != "x$local_prefix" \
4480    && test "$prefix" != "NONE"; then
4481   AC_DEFINE_UNQUOTED(PREFIX_INCLUDE_DIR, "$prefix/include",
4482 [Define to PREFIX/include if cpp should also search that directory.])
4483 fi
4484
4485 # Determine the version of glibc, if any, used on the target.
4486 AC_MSG_CHECKING([for target glibc version])
4487 AC_ARG_WITH([glibc-version],
4488   [AS_HELP_STRING([--with-glibc-version=M.N],
4489     [assume GCC used with glibc version M.N or later])], [
4490 if [echo "$with_glibc_version" | grep '^[0-9][0-9]*\.[0-9][0-9]*$']; then
4491   glibc_version_major=`echo "$with_glibc_version" | sed -e 's/\..*//'`
4492   glibc_version_minor=`echo "$with_glibc_version" | sed -e 's/.*\.//'`
4493 else
4494   AC_MSG_ERROR([option --with-glibc-version requires a version number M.N])
4495 fi], [
4496 glibc_version_major=0
4497 glibc_version_minor=0
4498 [if test -f $target_header_dir/features.h \
4499   && glibc_version_major_define=`$EGREP '^[     ]*#[    ]*define[       ]+__GLIBC__[    ]+[0-9]' $target_header_dir/features.h` \
4500   && glibc_version_minor_define=`$EGREP '^[     ]*#[    ]*define[       ]+__GLIBC_MINOR__[      ]+[0-9]' $target_header_dir/features.h`; then
4501   glibc_version_major=`echo "$glibc_version_major_define" | sed -e 's/.*__GLIBC__[      ]*//'`
4502   glibc_version_minor=`echo "$glibc_version_minor_define" | sed -e 's/.*__GLIBC_MINOR__[        ]*//'`
4503 fi]])
4504 AC_MSG_RESULT([$glibc_version_major.$glibc_version_minor])
4505
4506 AC_ARG_ENABLE(gnu-unique-object,
4507  [AS_HELP_STRING([--enable-gnu-unique-object],
4508    [enable the use of the @gnu_unique_object ELF extension on glibc systems])],
4509  [case $enable_gnu_unique_object in
4510     yes | no) ;;
4511     *) AC_MSG_ERROR(['$enable_gnu_unique_object' is an invalid value for --enable-gnu-unique-object.
4512 Valid choices are 'yes' and 'no'.]) ;;
4513   esac],
4514  [gcc_GAS_CHECK_FEATURE([gnu_unique_object], gcc_cv_as_gnu_unique_object,
4515    [elf,2,19,52],,
4516    [.type foo, '$target_type_format_char'gnu_unique_object],,
4517 # We need to unquote above to to use the definition from config.gcc.
4518 # Also check for ld.so support, i.e. glibc 2.11 or higher.
4519    [GCC_GLIBC_VERSION_GTE_IFELSE([2], [11], [enable_gnu_unique_object=yes], )]
4520    )])
4521 if test x$enable_gnu_unique_object = xyes; then
4522   AC_DEFINE(HAVE_GAS_GNU_UNIQUE_OBJECT, 1,
4523    [Define if your assembler supports @gnu_unique_object.])
4524 fi
4525
4526 AC_CACHE_CHECK([assembler for tolerance to line number 0],
4527  [gcc_cv_as_line_zero],
4528  [gcc_cv_as_line_zero=no
4529   if test $in_tree_gas = yes; then
4530     gcc_GAS_VERSION_GTE_IFELSE(2, 16, 91, [gcc_cv_as_line_zero=yes])
4531   elif test "x$gcc_cv_as" != x; then
4532     { echo '# 1 "test.s" 1'; echo '# 0 "" 2'; } > conftest.s
4533     if AC_TRY_COMMAND([$gcc_cv_as -o conftest.o conftest.s >&AS_MESSAGE_LOG_FD 2>conftest.out]) &&
4534        test "x`cat conftest.out`" = x
4535     then
4536       gcc_cv_as_line_zero=yes
4537     else
4538       echo "configure: failed program was" >&AS_MESSAGE_LOG_FD
4539       cat conftest.s >&AS_MESSAGE_LOG_FD
4540       echo "configure: error output was" >&AS_MESSAGE_LOG_FD
4541       cat conftest.out >&AS_MESSAGE_LOG_FD
4542     fi
4543     rm -f conftest.o conftest.s conftest.out
4544   fi])
4545 if test "x$gcc_cv_as_line_zero" = xyes; then
4546   AC_DEFINE([HAVE_AS_LINE_ZERO], 1,
4547 [Define if the assembler won't complain about a line such as # 0 "" 2.])
4548 fi
4549
4550 AC_MSG_CHECKING(linker PT_GNU_EH_FRAME support)
4551 gcc_cv_ld_eh_frame_hdr=no
4552 if test $in_tree_ld = yes ; then
4553   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 12 -o "$gcc_cv_gld_major_version" -gt 2 \
4554      && test $in_tree_ld_is_elf = yes; then
4555     gcc_cv_ld_eh_frame_hdr=yes
4556   fi
4557 elif test x$gcc_cv_ld != x; then
4558   if echo "$ld_ver" | grep GNU > /dev/null; then
4559     # Check if linker supports --eh-frame-hdr option
4560     if $gcc_cv_ld --help 2>/dev/null | grep eh-frame-hdr > /dev/null; then
4561       gcc_cv_ld_eh_frame_hdr=yes
4562     fi
4563   else
4564     case "$target" in
4565       *-*-solaris2*)
4566         # Sun ld has various bugs in .eh_frame_hdr support before version 1.2251.
4567         if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 2251; then
4568           gcc_cv_ld_eh_frame_hdr=yes
4569         fi
4570         ;;
4571     esac
4572   fi
4573 fi
4574 GCC_TARGET_TEMPLATE([HAVE_LD_EH_FRAME_HDR])
4575 if test x"$gcc_cv_ld_eh_frame_hdr" = xyes; then
4576         AC_DEFINE(HAVE_LD_EH_FRAME_HDR, 1,
4577 [Define if your linker supports .eh_frame_hdr.])
4578 fi
4579 AC_MSG_RESULT($gcc_cv_ld_eh_frame_hdr)
4580
4581 AC_MSG_CHECKING(linker CIEv3 in .eh_frame support)
4582 gcc_cv_ld_eh_frame_ciev3=no
4583 if test $in_tree_ld = yes ; then
4584   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
4585      && test $in_tree_ld_is_elf = yes; then
4586     gcc_cv_ld_eh_frame_ciev3=yes
4587   fi
4588 elif test x$gcc_cv_ld != x; then
4589   if echo "$ld_ver" | grep GNU > /dev/null; then
4590     gcc_cv_ld_eh_frame_ciev3=yes
4591     if test 0"$ld_date" -lt 20040513; then
4592       if test -n "$ld_date"; then
4593         # If there was date string, but was earlier than 2004-05-13, fail
4594         gcc_cv_ld_eh_frame_ciev3=no
4595       elif test "$ld_vers_major" -lt 2; then
4596         gcc_cv_ld_eh_frame_ciev3=no
4597       elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
4598         gcc_cv_ld_eh_frame_ciev3=no
4599       fi
4600     fi
4601   else
4602     case "$target" in
4603       *-*-solaris2*)
4604         # Sun ld added support for CIE v3 in .eh_frame in Solaris 11.1.
4605         if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 2324; then
4606           gcc_cv_ld_eh_frame_ciev3=yes
4607         fi
4608         ;;
4609     esac
4610   fi
4611 fi
4612 AC_DEFINE_UNQUOTED(HAVE_LD_EH_FRAME_CIEV3,
4613   [`if test x"$gcc_cv_ld_eh_frame_ciev3" = xyes; then echo 1; else echo 0; fi`],
4614   [Define 0/1 if your linker supports CIE v3 in .eh_frame.])
4615 AC_MSG_RESULT($gcc_cv_ld_eh_frame_ciev3)
4616
4617 AC_MSG_CHECKING(linker position independent executable support)
4618 gcc_cv_ld_pie=no
4619 if test $in_tree_ld = yes ; then
4620   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 15 -o "$gcc_cv_gld_major_version" -gt 2 \
4621      && test $in_tree_ld_is_elf = yes; then
4622     gcc_cv_ld_pie=yes
4623   fi
4624 elif test x$gcc_cv_ld != x; then
4625         # Check if linker supports -pie option
4626         if $gcc_cv_ld --help 2>/dev/null | grep -- -pie > /dev/null; then
4627                 gcc_cv_ld_pie=yes
4628         fi
4629 fi
4630 if test x"$gcc_cv_ld_pie" = xyes; then
4631         AC_DEFINE(HAVE_LD_PIE, 1,
4632 [Define if your linker supports -pie option.])
4633 fi
4634 AC_MSG_RESULT($gcc_cv_ld_pie)
4635
4636 AC_MSG_CHECKING(linker EH-compatible garbage collection of sections)
4637 gcc_cv_ld_eh_gc_sections=no
4638 if test $in_tree_ld = yes ; then
4639   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 17 -o "$gcc_cv_gld_major_version" -gt 2 \
4640      && test $in_tree_ld_is_elf = yes; then
4641     gcc_cv_ld_eh_gc_sections=yes
4642   fi
4643 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
4644   cat > conftest.s <<EOF
4645         .section        .text
4646 .globl _start
4647         .type _start, @function
4648 _start:
4649         .long foo
4650         .size _start, .-_start
4651         .section        .text.foo,"ax",@progbits
4652         .type foo, @function
4653 foo:
4654         .long 0
4655         .size foo, .-foo
4656         .section        .gcc_except_table.foo,"a",@progbits
4657 .L0:
4658         .long 0
4659         .section        .eh_frame,"a",@progbits
4660         .long .L0
4661 EOF
4662   if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
4663     if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
4664          | grep "gc-sections option ignored" > /dev/null; then
4665       gcc_cv_ld_eh_gc_sections=no
4666     elif $gcc_cv_objdump -h conftest 2> /dev/null \
4667          | grep gcc_except_table > /dev/null; then
4668       gcc_cv_ld_eh_gc_sections=yes
4669       # If no COMDAT groups, the compiler will emit .gnu.linkonce.t. sections.
4670       if test x$gcc_cv_as_comdat_group != xyes; then
4671         gcc_cv_ld_eh_gc_sections=no
4672         cat > conftest.s <<EOF
4673         .section        .text
4674 .globl _start
4675         .type _start, @function
4676 _start:
4677         .long foo
4678         .size _start, .-_start
4679         .section        .gnu.linkonce.t.foo,"ax",@progbits
4680         .type foo, @function
4681 foo:
4682         .long 0
4683         .size foo, .-foo
4684         .section        .gcc_except_table.foo,"a",@progbits
4685 .L0:
4686         .long 0
4687         .section        .eh_frame,"a",@progbits
4688         .long .L0
4689 EOF
4690         if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
4691           if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
4692                | grep "gc-sections option ignored" > /dev/null; then
4693             gcc_cv_ld_eh_gc_sections=no
4694           elif $gcc_cv_objdump -h conftest 2> /dev/null \
4695                | grep gcc_except_table > /dev/null; then
4696             gcc_cv_ld_eh_gc_sections=yes
4697           fi
4698         fi
4699       fi
4700     fi
4701   fi
4702   rm -f conftest.s conftest.o conftest
4703 fi
4704 case "$target" in
4705   hppa*-*-linux*)
4706     # ??? This apparently exposes a binutils bug with PC-relative relocations.
4707     gcc_cv_ld_eh_gc_sections=no
4708     ;;
4709 esac
4710 if test x$gcc_cv_ld_eh_gc_sections = xyes; then
4711         AC_DEFINE(HAVE_LD_EH_GC_SECTIONS, 1,
4712   [Define if your linker supports garbage collection of
4713    sections in presence of EH frames.])
4714 fi
4715 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections)
4716
4717 AC_MSG_CHECKING(linker EH garbage collection of sections bug)
4718 gcc_cv_ld_eh_gc_sections_bug=no
4719 if test $in_tree_ld = yes ; then
4720   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -lt 19 -o "$gcc_cv_gld_major_version" -lt 2 \
4721      && test $in_tree_ld_is_elf = yes; then
4722     gcc_cv_ld_eh_gc_sections_bug=yes
4723   fi
4724 elif test x$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
4725   gcc_cv_ld_eh_gc_sections_bug=yes
4726   cat > conftest.s <<EOF
4727         .section        .text
4728 .globl _start
4729         .type _start, @function
4730 _start:
4731         .long foo
4732         .size _start, .-_start
4733         .section        .text.startup.foo,"ax",@progbits
4734         .type foo, @function
4735 foo:
4736         .long 0
4737         .size foo, .-foo
4738         .section        .gcc_except_table.foo,"a",@progbits
4739 .L0:
4740         .long 0
4741         .section        .eh_frame,"a",@progbits
4742         .long .L0
4743 EOF
4744   if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
4745     if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
4746          | grep "gc-sections option ignored" > /dev/null; then
4747       :
4748     elif $gcc_cv_objdump -h conftest 2> /dev/null \
4749          | grep gcc_except_table > /dev/null; then
4750       gcc_cv_ld_eh_gc_sections_bug=no
4751     fi
4752   fi
4753   rm -f conftest.s conftest.o conftest
4754 fi
4755 if test x$gcc_cv_ld_eh_gc_sections_bug = xyes; then
4756         AC_DEFINE(HAVE_LD_EH_GC_SECTIONS_BUG, 1,
4757   [Define if your linker has buggy garbage collection of
4758    sections support when .text.startup.foo like sections are used.])
4759 fi
4760 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections_bug)
4761
4762 AC_MSG_CHECKING(linker for compressed debug sections)
4763 # gold/gld support compressed debug sections since binutils 2.19/2.21
4764 if test $in_tree_ld = yes ; then
4765   gcc_cv_ld_compress_debug=0
4766   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 19 -o "$gcc_cv_gld_major_version" -gt 2 \
4767      && test $in_tree_ld_is_elf = yes && test $ld_is_gold = yes; then
4768     gcc_cv_ld_compress_debug=2
4769     gcc_cv_ld_compress_debug_option="--compress-debug-sections"
4770   elif test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2 \
4771      && test $in_tree_ld_is_elf = yes; then
4772     gcc_cv_ld_compress_debug=1
4773   fi
4774 elif echo "$ld_ver" | grep GNU > /dev/null; then
4775   gcc_cv_ld_compress_debug=1
4776   if test 0"$ld_date" -lt 20050308; then
4777     if test -n "$ld_date"; then
4778       # If there was date string, but was earlier than 2005-03-08, fail
4779       gcc_cv_ld_compress_debug=0
4780     elif test "$ld_vers_major" -lt 2; then
4781       gcc_cv_ld_compress_debug=0
4782     elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 21; then
4783       gcc_cv_ld_compress_debug=0
4784     fi
4785   fi
4786   if test $ld_is_gold = yes; then
4787     gcc_cv_ld_compress_debug=2
4788     gcc_cv_ld_compress_debug_option="--compress-debug-sections"
4789   fi
4790 else
4791 changequote(,)dnl
4792   case "${target}" in
4793     *-*-solaris2*)
4794       # Introduced in Solaris 11.2.
4795       if $gcc_cv_ld --help 2>&1 | grep -- '-z compress-sections' > /dev/null; then
4796         gcc_cv_ld_compress_debug=3
4797         gcc_cv_ld_compress_debug_option="-z compress-sections"
4798       else
4799         gcc_cv_ld_compress_debug=0
4800       fi
4801       ;;
4802     *)
4803       # Assume linkers other than GNU ld don't support compessed debug
4804       # sections.
4805       gcc_cv_ld_compress_debug=0
4806       ;;
4807   esac
4808 changequote([,])dnl
4809 fi
4810 AC_DEFINE_UNQUOTED(HAVE_LD_COMPRESS_DEBUG, $gcc_cv_ld_compress_debug,
4811 [Define to the level of your linker's compressed debug section support.])
4812 AC_DEFINE_UNQUOTED(LD_COMPRESS_DEBUG_OPTION, "$gcc_cv_ld_compress_debug_option",
4813 [Define to the linker option to enable compressed debug sections.])
4814 AC_MSG_RESULT($gcc_cv_ld_compress_debug)
4815
4816 # --------
4817 # UNSORTED
4818 # --------
4819
4820 AC_CACHE_CHECK(linker --as-needed support,
4821 gcc_cv_ld_as_needed,
4822 [gcc_cv_ld_as_needed=no
4823 gcc_cv_ld_as_needed_option='--as-needed'
4824 gcc_cv_ld_no_as_needed_option='--no-as-needed'
4825 if test $in_tree_ld = yes ; then
4826   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
4827      && test $in_tree_ld_is_elf = yes; then
4828     gcc_cv_ld_as_needed=yes
4829   fi
4830 elif test x$gcc_cv_ld != x; then
4831         # Check if linker supports --as-needed and --no-as-needed options
4832         if $gcc_cv_ld --help 2>/dev/null | grep as-needed > /dev/null; then
4833                 gcc_cv_ld_as_needed=yes
4834         else
4835           case "$target" in
4836             # Solaris 2 ld always supports -z ignore/-z record.
4837             *-*-solaris2*)
4838               gcc_cv_ld_as_needed=yes
4839               gcc_cv_ld_as_needed_option="-z ignore"
4840               gcc_cv_ld_no_as_needed_option="-z record"
4841               ;;
4842           esac
4843         fi
4844 fi
4845 # --as-needed/-z ignore can only be used if libgcc_s.so.1 uses
4846 # dl_iterate_phdr, i.e. since Solaris 11.
4847 case "$target" in
4848   *-*-solaris2.1[[1-9]]*)
4849     case "$target" in
4850     i?86-*-* | x86_64-*-*)
4851       if echo "$ld_ver" | grep GNU > /dev/null; then
4852         # Doesn't work with gld on Solaris/x86 due to PR ld/12320.
4853         gcc_cv_ld_as_needed=no
4854       fi
4855       ;;
4856     esac
4857     ;;
4858   *-*-solaris2*)
4859     gcc_cv_ld_as_needed=no
4860     ;;
4861 esac
4862 ])
4863 if test x"$gcc_cv_ld_as_needed" = xyes; then
4864         AC_DEFINE(HAVE_LD_AS_NEEDED, 1,
4865 [Define if your linker supports --as-needed/--no-as-needed or equivalent options.])
4866         AC_DEFINE_UNQUOTED(LD_AS_NEEDED_OPTION, "$gcc_cv_ld_as_needed_option",
4867 [Define to the linker option to ignore unused dependencies.])
4868         AC_DEFINE_UNQUOTED(LD_NO_AS_NEEDED_OPTION, "$gcc_cv_ld_no_as_needed_option",
4869 [Define to the linker option to keep unused dependencies.])
4870 fi
4871
4872 AC_MSG_CHECKING(linker mapfile support for clearing hardware capabilities)
4873 saved_LDFLAGS="$LDFLAGS"
4874 for clearcap_map in sol2-clearcapv2.map sol2-clearcap.map; do
4875   LDFLAGS="$saved_LDFLAGS -Wl,-M,${srcdir}/config/$clearcap_map"
4876   AC_LINK_IFELSE([int main(void) {return 0;}],
4877     [gcc_cv_ld_clearcap=yes; break], [gcc_cv_ld_clearcap=no])
4878 done
4879 LDFLAGS="$saved_LDFLAGS"
4880 if test "x$gcc_cv_ld_clearcap" = xyes; then
4881   AC_DEFINE([HAVE_LD_CLEARCAP], 1,
4882 [Define if the linker supports clearing hardware capabilities via mapfile.])
4883   AC_CONFIG_LINKS([clearcap.map:${srcdir}/config/$clearcap_map])
4884 fi
4885 AC_MSG_RESULT($gcc_cv_ld_clearcap)
4886
4887 case "$target:$tm_file" in
4888   powerpc64-*-freebsd* | powerpc64*-*-linux* | powerpc*-*-linux*rs6000/biarch64.h*)
4889   case "$target" in
4890      *le-*-linux*)
4891      emul_name="-melf64lppc"
4892       ;;
4893      *-*-linux*)
4894      emul_name="-melf64ppc"
4895       ;;
4896      *-*-freebsd*)
4897      emul_name="-melf64ppc_fbsd"
4898       ;;
4899   esac
4900     AC_CACHE_CHECK(linker support for omitting dot symbols,
4901     gcc_cv_ld_no_dot_syms,
4902     [gcc_cv_ld_no_dot_syms=no
4903     if test x"$ld_is_gold" = xyes; then
4904       gcc_cv_ld_no_dot_syms=yes
4905     elif test $in_tree_ld = yes ; then
4906       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2; then
4907         gcc_cv_ld_no_dot_syms=yes
4908       fi
4909     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
4910       cat > conftest1.s <<EOF
4911         .text
4912         bl .foo
4913 EOF
4914       cat > conftest2.s <<EOF
4915         .section ".opd","aw"
4916         .align 3
4917         .globl foo
4918         .type foo,@function
4919 foo:
4920         .quad .LEfoo,.TOC.@tocbase,0
4921         .text
4922 .LEfoo:
4923         blr
4924         .size foo,.-.LEfoo
4925 EOF
4926       if $gcc_cv_as -a64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
4927          && $gcc_cv_as -a64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
4928          && $gcc_cv_ld $emul_name -o conftest conftest1.o conftest2.o > /dev/null 2>&1; then
4929         gcc_cv_ld_no_dot_syms=yes
4930       fi
4931       rm -f conftest conftest1.o conftest2.o conftest1.s conftest2.s
4932     fi
4933     ])
4934     if test x"$gcc_cv_ld_no_dot_syms" = xyes; then
4935       AC_DEFINE(HAVE_LD_NO_DOT_SYMS, 1,
4936     [Define if your PowerPC64 linker only needs function descriptor syms.])
4937     fi
4938
4939     AC_CACHE_CHECK(linker large toc support,
4940     gcc_cv_ld_large_toc,
4941     [gcc_cv_ld_large_toc=no
4942     if test x"$ld_is_gold" = xyes; then
4943       gcc_cv_ld_large_toc=yes
4944     elif test $in_tree_ld = yes ; then
4945       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2; then
4946         gcc_cv_ld_large_toc=yes
4947       fi
4948     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
4949       cat > conftest.s <<EOF
4950         .section ".tbss","awT",@nobits
4951         .align 3
4952 ie0:    .space 8
4953         .global _start
4954         .text
4955 _start:
4956         addis 9,13,ie0@got@tprel@ha
4957         ld 9,ie0@got@tprel@l(9)
4958 EOF
4959       if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1 \
4960          && $gcc_cv_ld $emul_name --no-toc-sort -o conftest conftest.o > /dev/null 2>&1; then
4961         gcc_cv_ld_large_toc=yes
4962       fi
4963       rm -f conftest conftest.o conftest.s
4964     fi
4965     ])
4966     if test x"$gcc_cv_ld_large_toc" = xyes; then
4967       AC_DEFINE(HAVE_LD_LARGE_TOC, 1,
4968     [Define if your PowerPC64 linker supports a large TOC.])
4969     fi
4970     ;;
4971 esac
4972
4973 case "$target" in
4974   *-*-aix*)
4975     AC_CACHE_CHECK(linker large toc support,
4976     gcc_cv_ld_large_toc,
4977     [gcc_cv_ld_large_toc=no
4978     if test x$gcc_cv_as != x ; then
4979       cat > conftest.s <<EOF
4980         .toc
4981 LC..1:
4982         .tc a[[TC]],a[[RW]]
4983         .extern a[[RW]]
4984         .csect .text[[PR]]
4985 .largetoctest:
4986         addis 9,LC..1@u(2)
4987         ld 3,LC..1@l(9)
4988 EOF
4989       if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1; then
4990         gcc_cv_ld_large_toc=yes
4991       fi
4992       rm -f conftest conftest.o conftest.s
4993     fi
4994     ])
4995     if test x"$gcc_cv_ld_large_toc" = xyes; then
4996       AC_DEFINE(HAVE_LD_LARGE_TOC, 1,
4997     [Define if your PowerPC64 linker supports a large TOC.])
4998     fi
4999     ;;
5000 esac
5001
5002 AC_CACHE_CHECK(linker --build-id support,
5003   gcc_cv_ld_buildid,
5004   [gcc_cv_ld_buildid=no
5005   if test $in_tree_ld = yes ; then
5006     if test "$gcc_cv_gld_major_version" -eq 2 -a \
5007        "$gcc_cv_gld_minor_version" -ge 18 -o \
5008        "$gcc_cv_gld_major_version" -gt 2 \
5009        && test $in_tree_ld_is_elf = yes; then
5010       gcc_cv_ld_buildid=yes
5011     fi
5012   elif test x$gcc_cv_ld != x; then
5013     if $gcc_cv_ld --help 2>/dev/null | grep build-id > /dev/null; then
5014       gcc_cv_ld_buildid=yes
5015     fi
5016   fi])
5017 if test x"$gcc_cv_ld_buildid" = xyes; then
5018   AC_DEFINE(HAVE_LD_BUILDID, 1,
5019   [Define if your linker supports --build-id.])
5020 fi
5021
5022 AC_ARG_ENABLE(linker-build-id,
5023 [AS_HELP_STRING([--enable-linker-build-id],
5024                 [compiler will always pass --build-id to linker])],
5025 [],
5026 enable_linker_build_id=no)
5027
5028 if test x"$enable_linker_build_id" = xyes; then
5029   if test x"$gcc_cv_ld_buildid" = xyes; then
5030     AC_DEFINE(ENABLE_LD_BUILDID, 1,
5031     [Define if gcc should always pass --build-id to linker.])
5032   else
5033     AC_MSG_WARN(--build-id is not supported by your linker; --enable-linker-build-id ignored)
5034   fi
5035 fi
5036
5037 # In binutils 2.21, GNU ld gained support for new emulations fully
5038 # supporting the Solaris 2 ABI.  Detect their presence in the linker used.
5039 AC_CACHE_CHECK(linker *_sol2 emulation support,
5040   gcc_cv_ld_sol2_emulation,
5041   [gcc_cv_ld_sol2_emulation=no
5042   if test $in_tree_ld = yes ; then
5043     if test "$gcc_cv_gld_major_version" -eq 2 -a \
5044        "$gcc_cv_gld_minor_version" -ge 21 -o \
5045        "$gcc_cv_gld_major_version" -gt 2 \
5046        && test $in_tree_ld_is_elf = yes; then
5047       gcc_cv_ld_sol2_emulation=yes
5048     fi
5049   elif test x$gcc_cv_ld != x; then
5050     if $gcc_cv_ld -V 2>/dev/null | sed -e '1,/Supported emulations/d;q' | \
5051        grep _sol2 > /dev/null; then
5052       gcc_cv_ld_sol2_emulation=yes
5053     fi
5054   fi])
5055 if test x"$gcc_cv_ld_sol2_emulation" = xyes; then
5056   AC_DEFINE(HAVE_LD_SOL2_EMULATION, 1,
5057   [Define if your linker supports the *_sol2 emulations.])
5058 fi
5059
5060 AC_CACHE_CHECK(linker --sysroot support,
5061   gcc_cv_ld_sysroot,
5062   [gcc_cv_ld_sysroot=no
5063   if test $in_tree_ld = yes ; then
5064       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 ; then
5065         gcc_cv_ld_sysroot=yes
5066       fi
5067   elif test x$gcc_cv_ld != x; then
5068     if $gcc_cv_ld --help 2>/dev/null | grep sysroot > /dev/null; then
5069       gcc_cv_ld_sysroot=yes
5070     fi
5071   fi])
5072 if test x"$gcc_cv_ld_sysroot" = xyes; then
5073   AC_DEFINE(HAVE_LD_SYSROOT, 1,
5074   [Define if your linker supports --sysroot.])
5075 fi
5076
5077 # Test for stack protector support in target C library.
5078 AC_CACHE_CHECK(__stack_chk_fail in target C library,
5079       gcc_cv_libc_provides_ssp,
5080       [gcc_cv_libc_provides_ssp=no
5081     case "$target" in
5082        *-*-linux* | *-*-kfreebsd*-gnu | *-*-knetbsd*-gnu)
5083       # glibc 2.4 and later provides __stack_chk_fail and
5084       # either __stack_chk_guard, or TLS access to stack guard canary.
5085       GCC_GLIBC_VERSION_GTE_IFELSE([2], [4], [gcc_cv_libc_provides_ssp=yes], [
5086       [if test -f $target_header_dir/features.h \
5087          && $EGREP '^[  ]*#[    ]*define[       ]+__GNU_LIBRARY__[      ]+([1-9][0-9]|[6-9])' \
5088             $target_header_dir/features.h > /dev/null; then
5089         if $EGREP '^[   ]*#[    ]*define[       ]+__UCLIBC__[   ]+1' \
5090              $target_header_dir/features.h > /dev/null && \
5091              test -f $target_header_dir/bits/uClibc_config.h && \
5092              $EGREP '^[         ]*#[    ]*define[       ]+__UCLIBC_HAS_SSP__[   ]+1' \
5093              $target_header_dir/bits/uClibc_config.h > /dev/null; then
5094           gcc_cv_libc_provides_ssp=yes
5095         fi
5096       # all versions of Bionic support stack protector
5097       elif test -f $target_header_dir/sys/cdefs.h \
5098         && $EGREP '^[  ]*#[    ]*define[       ]+__BIONIC__[   ]+1' \
5099            $target_header_dir/sys/cdefs.h > /dev/null; then
5100          gcc_cv_libc_provides_ssp=yes
5101       fi]])
5102         ;;
5103        *-*-gnu*)
5104          # Avoid complicated tests (see
5105          # <http://gcc.gnu.org/ml/gcc/2008-10/msg00130.html>) and for now
5106          # simply assert that glibc does provide this, which is true for all
5107          # realistically usable GNU/Hurd configurations.
5108          gcc_cv_libc_provides_ssp=yes;;
5109        *-*-darwin* | *-*-freebsd*)
5110          AC_CHECK_FUNC(__stack_chk_fail,[gcc_cv_libc_provides_ssp=yes],
5111            [echo "no __stack_chk_fail on this target"])
5112         ;;
5113   *) gcc_cv_libc_provides_ssp=no ;;
5114     esac])
5115
5116 if test x$gcc_cv_libc_provides_ssp = xyes; then
5117   AC_DEFINE(TARGET_LIBC_PROVIDES_SSP, 1,
5118             [Define if your target C library provides stack protector support])
5119 fi
5120
5121 # Test for <sys/sdt.h> on the target.
5122 GCC_TARGET_TEMPLATE([HAVE_SYS_SDT_H])
5123 AC_MSG_CHECKING(sys/sdt.h in the target C library)
5124 have_sys_sdt_h=no
5125 if test -f $target_header_dir/sys/sdt.h; then
5126   have_sys_sdt_h=yes
5127   AC_DEFINE(HAVE_SYS_SDT_H, 1,
5128             [Define if your target C library provides sys/sdt.h])
5129 fi
5130 AC_MSG_RESULT($have_sys_sdt_h)
5131
5132 # Check if TFmode long double should be used by default or not.
5133 # Some glibc targets used DFmode long double, but with glibc 2.4
5134 # and later they can use TFmode.
5135 case "$target" in
5136   powerpc*-*-linux* | \
5137   sparc*-*-linux* | \
5138   s390*-*-linux* | \
5139   alpha*-*-linux*)
5140     AC_ARG_WITH(long-double-128,
5141       [AS_HELP_STRING([--with-long-double-128],
5142                       [use 128-bit long double by default])],
5143       gcc_cv_target_ldbl128="$with_long_double_128",
5144       [GCC_GLIBC_VERSION_GTE_IFELSE([2], [4], [gcc_cv_target_ldbl128=yes], [
5145       [gcc_cv_target_ldbl128=no
5146       grep '^[  ]*#[    ]*define[       ][      ]*__LONG_DOUBLE_MATH_OPTIONAL' \
5147         $target_header_dir/bits/wordsize.h > /dev/null 2>&1 \
5148       && gcc_cv_target_ldbl128=yes
5149       ]])])
5150     ;;
5151 esac
5152 if test x$gcc_cv_target_ldbl128 = xyes; then
5153   AC_DEFINE(TARGET_DEFAULT_LONG_DOUBLE_128, 1,
5154             [Define if TFmode long double should be the default])
5155 fi
5156
5157 AC_MSG_CHECKING(dl_iterate_phdr in target C library)
5158 gcc_cv_target_dl_iterate_phdr=unknown
5159 case "$target" in
5160   # Restrict to Solaris 11+.  While most of the Solaris 11 linker changes
5161   # were backported to Solaris 10 Update 10, dl_iterate_phdr only lives in
5162   # libdl there, both complicating its use and breaking compatibility
5163   # between Solaris 10 updates.
5164   *-*-solaris2.1[[1-9]]*)
5165     # <link.h> needs both a dl_iterate_phdr declaration and support for
5166     # compilation with largefile support.
5167     if grep dl_iterate_phdr $target_header_dir/link.h > /dev/null 2>&1 \
5168       && grep 'large file capable' $target_header_dir/link.h > /dev/null 2>&1; then
5169       gcc_cv_target_dl_iterate_phdr=yes
5170     else
5171       gcc_cv_target_dl_iterate_phdr=no
5172     fi
5173     ;;
5174   *-*-dragonfly* | *-*-freebsd*)
5175     if grep dl_iterate_phdr $target_header_dir/sys/link_elf.h > /dev/null 2>&1; then
5176       gcc_cv_target_dl_iterate_phdr=yes
5177     else
5178       gcc_cv_target_dl_iterate_phdr=no
5179     fi
5180     ;;
5181 esac
5182 GCC_TARGET_TEMPLATE([TARGET_DL_ITERATE_PHDR])
5183 if test x$gcc_cv_target_dl_iterate_phdr = xyes; then
5184    AC_DEFINE(TARGET_DL_ITERATE_PHDR, 1,
5185 [Define if your target C library provides the `dl_iterate_phdr' function.])
5186 fi
5187 AC_MSG_RESULT($gcc_cv_target_dl_iterate_phdr)
5188
5189 # We no longer support different GC mechanisms.  Emit an error if
5190 # the user configures with --with-gc.
5191 AC_ARG_WITH(gc,
5192 [AS_HELP_STRING([--with-gc={page,zone}],
5193                 [this option is not supported anymore.  It used to choose
5194                  the garbage collection mechanism to use with the compiler])],
5195 [AC_MSG_ERROR([Configure option --with-gc is only supported up to GCC 4.7.x])],
5196 [])
5197
5198 # Libraries to use on the host.  This will normally be set by the top
5199 # level Makefile.  Here we simply capture the value for our Makefile.
5200 if test -z "${HOST_LIBS+set}"; then
5201   HOST_LIBS=
5202 fi
5203 AC_SUBST(HOST_LIBS)
5204
5205 # Use the system's zlib library.
5206 zlibdir=-L../zlib
5207 zlibinc="-I\$(srcdir)/../zlib"
5208 AC_ARG_WITH(system-zlib,
5209 [AS_HELP_STRING([--with-system-zlib], [use installed libz])],
5210 zlibdir=
5211 zlibinc=
5212 )
5213 AC_SUBST(zlibdir)
5214 AC_SUBST(zlibinc)
5215
5216 dnl Very limited version of automake's enable-maintainer-mode
5217
5218 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
5219   dnl maintainer-mode is disabled by default
5220   AC_ARG_ENABLE(maintainer-mode,
5221 [AS_HELP_STRING([--enable-maintainer-mode],
5222                 [enable make rules and dependencies not useful
5223                  (and sometimes confusing) to the casual installer])],
5224       maintainer_mode=$enableval,
5225       maintainer_mode=no)
5226
5227 AC_MSG_RESULT($maintainer_mode)
5228
5229 if test "$maintainer_mode" = "yes"; then
5230   MAINT=''
5231 else
5232   MAINT='#'
5233 fi
5234 AC_SUBST(MAINT)dnl
5235
5236 dnl Whether to prevent multiple front-ends from linking at the same time
5237
5238 AC_MSG_CHECKING([whether to avoid linking multiple front-ends at once])
5239   AC_ARG_ENABLE(link-mutex,
5240 [AS_HELP_STRING([--enable-link-mutex],
5241                 [avoid linking multiple front-ends at once to avoid thrashing
5242                  on the build machine])],
5243       do_link_mutex=$enableval,
5244       do_link_mutex=no)
5245 AC_MSG_RESULT($do_link_mutex)
5246
5247 if test "$do_link_mutex" = "yes"; then
5248    DO_LINK_MUTEX=true
5249 else
5250    DO_LINK_MUTEX=false
5251 fi
5252 AC_SUBST(DO_LINK_MUTEX)
5253
5254 # --------------
5255 # Language hooks
5256 # --------------
5257
5258 # Make empty files to contain the specs and options for each language.
5259 # Then add #include lines to for a compiler that has specs and/or options.
5260
5261 subdirs=
5262 lang_opt_files=
5263 lang_specs_files=
5264 lang_tree_files=
5265 # These (without "all_") are set in each config-lang.in.
5266 # `language' must be a single word so is spelled singularly.
5267 all_languages=
5268 all_compilers=
5269 all_outputs='Makefile'
5270 # List of language makefile fragments.
5271 all_lang_makefrags=
5272 # Additional files for gengtype
5273 all_gtfiles="$target_gtfiles"
5274
5275 # These are the languages that are set in --enable-languages,
5276 # and are available in the GCC tree.
5277 all_selected_languages=
5278
5279 # Add the language fragments.
5280 # Languages are added via two mechanisms.  Some information must be
5281 # recorded in makefile variables, these are defined in config-lang.in.
5282 # We accumulate them and plug them into the main Makefile.
5283 # The other mechanism is a set of hooks for each of the main targets
5284 # like `clean', `install', etc.
5285
5286 language_hooks="Make-hooks"
5287
5288 for lang in ${srcdir}/*/config-lang.in
5289 do
5290 changequote(,)dnl
5291         test "$lang" = "${srcdir}/*/config-lang.in" && continue
5292
5293         lang_alias=`sed -n -e 's,^language=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^language=\([^   ]*\).*$,\1,p' $lang`
5294         if test "x$lang_alias" = x
5295         then
5296               echo "$lang doesn't set \$language." 1>&2
5297               exit 1
5298         fi
5299         subdir="`echo $lang | sed -e 's,^.*/\([^/]*\)/config-lang.in$,\1,'`"
5300         subdirs="$subdirs $subdir"
5301
5302         # $gcc_subdir is where the gcc integration files are to be found
5303         # for a language, both for internal compiler purposes (compiler
5304         # sources implementing front-end to GCC tree converters), and for
5305         # build infrastructure purposes (Make-lang.in, etc.)
5306         #
5307         # This will be <subdir> (relative to $srcdir) if a line like
5308         # gcc_subdir="<subdir>" or gcc_subdir=<subdir>
5309         # is found in <langdir>/config-lang.in, and will remain <langdir>
5310         # otherwise.
5311         #
5312         # Except for the language alias (fetched above), the regular
5313         # "config-lang.in" contents are always retrieved from $gcc_subdir,
5314         # so a <langdir>/config-lang.in setting gcc_subdir typically sets
5315         # only this and the language alias.
5316
5317         gcc_subdir=`sed -n -e 's,^gcc_subdir=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^gcc_subdir=\([^   ]*\).*$,\1,p' $lang`
5318         if [ "$gcc_subdir" = "" ]; then
5319            gcc_subdir="$subdir"
5320         fi
5321
5322         case ",$enable_languages," in
5323         *,$lang_alias,*)
5324             all_selected_languages="$all_selected_languages $lang_alias"
5325             if test -f $srcdir/$gcc_subdir/lang-specs.h; then
5326                 lang_specs_files="$lang_specs_files $srcdir/$gcc_subdir/lang-specs.h"
5327             fi
5328             ;;
5329         esac
5330 changequote([,])dnl
5331
5332         language=
5333         boot_language=
5334         compilers=
5335         outputs=
5336         gtfiles=
5337         subdir_requires=
5338         . ${srcdir}/$gcc_subdir/config-lang.in
5339         if test "x$language" = x
5340         then
5341                 echo "${srcdir}/$gcc_subdir/config-lang.in doesn't set \$language." 1>&2
5342                 exit 1
5343         fi
5344
5345         ok=:
5346         case ",$enable_languages," in
5347                 *,$lang_alias,*) ;;
5348                 *)
5349                         for i in $subdir_requires; do
5350                                 test -f "${srcdir}/$i/config-lang.in" && continue
5351                                 ok=false
5352                                 break
5353                         done
5354                 ;;
5355         esac
5356         $ok || continue
5357
5358         all_lang_makefrags="$all_lang_makefrags \$(srcdir)/$gcc_subdir/Make-lang.in"
5359         if test -f $srcdir/$gcc_subdir/lang.opt; then
5360             lang_opt_files="$lang_opt_files $srcdir/$gcc_subdir/lang.opt"
5361             all_opt_files="$all_opt_files $srcdir/$gcc_subdir/lang.opt"
5362         fi
5363         if test -f $srcdir/$gcc_subdir/$subdir-tree.def; then
5364             lang_tree_files="$lang_tree_files $srcdir/$gcc_subdir/$subdir-tree.def"
5365         fi
5366         all_languages="$all_languages $language"
5367         all_compilers="$all_compilers $compilers"
5368         all_outputs="$all_outputs $outputs"
5369         all_gtfiles="$all_gtfiles [[$subdir]] $gtfiles"
5370         case ",$enable_languages," in
5371                 *,lto,*)
5372                     AC_DEFINE(ENABLE_LTO, 1, [Define to enable LTO support.])
5373                     enable_lto=yes
5374                     AC_SUBST(enable_lto)
5375                     ;;
5376                 *) ;;
5377         esac
5378 done
5379
5380 check_languages=
5381 for language in $all_selected_languages
5382 do
5383         check_languages="$check_languages check-$language"
5384 done
5385
5386 # We link each language in with a set of hooks, reached indirectly via
5387 # lang.${target}.  Only do so for selected languages.
5388
5389 rm -f Make-hooks
5390 touch Make-hooks
5391 target_list="all.cross start.encap rest.encap tags \
5392         install-common install-man install-info install-pdf install-html dvi \
5393         pdf html uninstall info man srcextra srcman srcinfo \
5394         mostlyclean clean distclean maintainer-clean install-plugin"
5395
5396 for t in $target_list
5397 do
5398         x=
5399         for lang in $all_selected_languages
5400         do
5401                 x="$x $lang.$t"
5402         done
5403         echo "lang.$t: $x" >> Make-hooks
5404 done
5405
5406 # --------
5407 # Option include files
5408 # --------
5409
5410 ${AWK} -f $srcdir/opt-include.awk $all_opt_files > option-includes.mk
5411 option_includes="option-includes.mk"
5412 AC_SUBST_FILE(option_includes)
5413
5414 # --------
5415 # UNSORTED
5416 # --------
5417
5418 # Create .gdbinit.
5419
5420 echo "dir ." > .gdbinit
5421 echo "dir ${srcdir}" >> .gdbinit
5422 if test x$gdb_needs_out_file_path = xyes
5423 then
5424         echo "dir ${srcdir}/config/"`dirname ${out_file}` >> .gdbinit
5425 fi
5426 if test "x$subdirs" != x; then
5427         for s in $subdirs
5428         do
5429                 echo "dir ${srcdir}/$s" >> .gdbinit
5430         done
5431 fi
5432 echo "source ${srcdir}/gdbinit.in" >> .gdbinit
5433 echo "python import sys; sys.path.append('${srcdir}'); import gdbhooks" >> .gdbinit
5434
5435 # Put a breakpoint on __asan_report_error to help with debugging buffer
5436 # overflow.
5437 case "$CFLAGS" in
5438 *-fsanitize=address*)
5439   echo "source ${srcdir}/gdbasan.in" >> .gdbinit
5440   ;;
5441 esac
5442
5443 gcc_tooldir='$(libsubdir)/$(libsubdir_to_prefix)$(target_noncanonical)'
5444 AC_SUBST(gcc_tooldir)
5445 AC_SUBST(dollar)
5446
5447 # Find a directory in which to install a shared libgcc.
5448
5449 AC_ARG_ENABLE(version-specific-runtime-libs,
5450 [AS_HELP_STRING([--enable-version-specific-runtime-libs],
5451                 [specify that runtime libraries should be
5452                  installed in a compiler-specific directory])])
5453
5454 # Substitute configuration variables
5455 AC_SUBST(subdirs)
5456 AC_SUBST(srcdir)
5457 AC_SUBST(all_compilers)
5458 AC_SUBST(all_gtfiles)
5459 AC_SUBST(all_lang_makefrags)
5460 AC_SUBST(all_languages)
5461 AC_SUBST(all_selected_languages)
5462 AC_SUBST(build_exeext)
5463 AC_SUBST(build_install_headers_dir)
5464 AC_SUBST(build_xm_file_list)
5465 AC_SUBST(build_xm_include_list)
5466 AC_SUBST(build_xm_defines)
5467 AC_SUBST(build_file_translate)
5468 AC_SUBST(check_languages)
5469 AC_SUBST(cpp_install_dir)
5470 AC_SUBST(xmake_file)
5471 AC_SUBST(tmake_file)
5472 AC_SUBST(TM_ENDIAN_CONFIG)
5473 AC_SUBST(TM_MULTILIB_CONFIG)
5474 AC_SUBST(TM_MULTILIB_EXCEPTIONS_CONFIG)
5475 AC_SUBST(extra_gcc_objs)
5476 AC_SUBST(user_headers_inc_next_pre)
5477 AC_SUBST(user_headers_inc_next_post)
5478 AC_SUBST(extra_headers_list)
5479 AC_SUBST(extra_objs)
5480 AC_SUBST(extra_programs)
5481 AC_SUBST(float_h_file)
5482 AC_SUBST(gcc_config_arguments)
5483 AC_SUBST(gcc_gxx_include_dir)
5484 AC_SUBST(gcc_gxx_include_dir_add_sysroot)
5485 AC_SUBST(host_exeext)
5486 AC_SUBST(host_xm_file_list)
5487 AC_SUBST(host_xm_include_list)
5488 AC_SUBST(host_xm_defines)
5489 AC_SUBST(out_host_hook_obj)
5490 AC_SUBST(install)
5491 AC_SUBST(lang_opt_files)
5492 AC_SUBST(lang_specs_files)
5493 AC_SUBST(lang_tree_files)
5494 AC_SUBST(local_prefix)
5495 AC_SUBST(md_file)
5496 AC_SUBST(objc_boehm_gc)
5497 AC_SUBST(out_file)
5498 AC_SUBST(out_object_file)
5499 AC_SUBST(common_out_file)
5500 AC_SUBST(common_out_object_file)
5501 AC_SUBST(tm_file_list)
5502 AC_SUBST(tm_include_list)
5503 AC_SUBST(tm_defines)
5504 AC_SUBST(tm_p_file_list)
5505 AC_SUBST(tm_p_include_list)
5506 AC_SUBST(xm_file_list)
5507 AC_SUBST(xm_include_list)
5508 AC_SUBST(xm_defines)
5509 AC_SUBST(use_gcc_stdint)
5510 AC_SUBST(c_target_objs)
5511 AC_SUBST(cxx_target_objs)
5512 AC_SUBST(fortran_target_objs)
5513 AC_SUBST(target_cpu_default)
5514
5515 AC_SUBST_FILE(language_hooks)
5516
5517 # Echo link setup.
5518 if test x${build} = x${host} ; then
5519   if test x${host} = x${target} ; then
5520     echo "Links are now set up to build a native compiler for ${target}." 1>&2
5521   else
5522     echo "Links are now set up to build a cross-compiler" 1>&2
5523     echo " from ${host} to ${target}." 1>&2
5524   fi
5525 else
5526   if test x${host} = x${target} ; then
5527     echo "Links are now set up to build (on ${build}) a native compiler" 1>&2
5528     echo " for ${target}." 1>&2
5529   else
5530     echo "Links are now set up to build (on ${build}) a cross-compiler" 1>&2
5531     echo " from ${host} to ${target}." 1>&2
5532   fi
5533 fi
5534
5535 AC_ARG_VAR(GMPLIBS,[How to link GMP])
5536 AC_ARG_VAR(GMPINC,[How to find GMP include files])
5537
5538 AC_ARG_VAR(ISLLIBS,[How to link ISL])
5539 AC_ARG_VAR(ISLINC,[How to find ISL include files])
5540 if test "x${ISLLIBS}" != "x" ; then
5541    AC_DEFINE(HAVE_isl, 1, [Define if isl is in use.])
5542 fi
5543
5544 AC_ARG_VAR(CLOOGLIBS,[How to link CLOOG])
5545 AC_ARG_VAR(CLOOGINC,[How to find CLOOG include files])
5546 if test "x${CLOOGLIBS}" != "x" ; then
5547    AC_DEFINE(HAVE_cloog, 1, [Define if cloog is in use.])
5548 fi
5549
5550 # Check for plugin support
5551 AC_ARG_ENABLE(plugin,
5552 [AS_HELP_STRING([--enable-plugin], [enable plugin support])],
5553 enable_plugin=$enableval,
5554 enable_plugin=yes; default_plugin=yes)
5555
5556 pluginlibs=
5557
5558 case "${host}" in
5559   *-*-darwin*)
5560     if test x$build = x$host; then
5561       export_sym_check="nm${exeext} -g"
5562     elif test x$host = x$target; then
5563       export_sym_check="$gcc_cv_nm -g"
5564     else
5565       export_sym_check=
5566     fi
5567   ;;
5568   *)
5569     if test x$build = x$host; then
5570       export_sym_check="objdump${exeext} -T"
5571     elif test x$host = x$target; then
5572       export_sym_check="$gcc_cv_objdump -T"
5573     else
5574       export_sym_check=
5575     fi
5576   ;;
5577 esac
5578
5579 if test x"$enable_plugin" = x"yes"; then
5580
5581   AC_MSG_CHECKING([for exported symbols])
5582   if test "x$export_sym_check" != x; then
5583     echo "int main() {return 0;} int foobar() {return 0;}" > conftest.c
5584     ${CC} ${CFLAGS} ${LDFLAGS} conftest.c -o conftest$ac_exeext > /dev/null 2>&1
5585     if $export_sym_check conftest$ac_exeext | grep -q foobar > /dev/null; then
5586       : # No need to use a flag
5587       AC_MSG_RESULT([yes])
5588     else
5589       AC_MSG_RESULT([yes])
5590       AC_MSG_CHECKING([for -rdynamic])
5591       ${CC} ${CFLAGS} ${LDFLAGS} -rdynamic conftest.c -o conftest$ac_exeext > /dev/null 2>&1
5592       if $export_sym_check conftest$ac_exeext | grep -q foobar > /dev/null; then
5593         plugin_rdynamic=yes
5594         pluginlibs="-rdynamic"
5595       else
5596         plugin_rdynamic=no
5597         enable_plugin=no
5598       fi
5599       AC_MSG_RESULT([$plugin_rdynamic])
5600     fi
5601   else
5602     AC_MSG_RESULT([unable to check])
5603   fi
5604
5605   # Check -ldl
5606   saved_LIBS="$LIBS"
5607   AC_SEARCH_LIBS([dlopen], [dl])
5608   if test x"$ac_cv_search_dlopen" = x"-ldl"; then
5609     pluginlibs="$pluginlibs -ldl"
5610   fi
5611   LIBS="$saved_LIBS"
5612
5613   # Check that we can build shared objects with -fPIC -shared
5614   saved_LDFLAGS="$LDFLAGS"
5615   saved_CFLAGS="$CFLAGS"
5616   case "${host}" in
5617     *-*-darwin*)
5618       CFLAGS=`echo $CFLAGS | sed s/-mdynamic-no-pic//g`
5619       CFLAGS="$CFLAGS -fPIC"
5620       LDFLAGS="$LDFLAGS -shared -undefined dynamic_lookup"
5621     ;;
5622     *)
5623       CFLAGS="$CFLAGS -fPIC"
5624       LDFLAGS="$LDFLAGS -fPIC -shared"
5625     ;;
5626   esac
5627   AC_MSG_CHECKING([for -fPIC -shared])
5628   AC_TRY_LINK(
5629     [extern int X;],[return X == 0;],
5630     [AC_MSG_RESULT([yes]); have_pic_shared=yes],
5631     [AC_MSG_RESULT([no]); have_pic_shared=no])
5632   if test x"$have_pic_shared" != x"yes" -o x"$ac_cv_search_dlopen" = x"no"; then
5633     pluginlibs=
5634     enable_plugin=no
5635   fi
5636   LDFLAGS="$saved_LDFLAGS"
5637   CFLAGS="$saved_CFLAGS"
5638
5639   # If plugin support had been requested but not available, fail.
5640   if test x"$enable_plugin" = x"no" ; then
5641     if test x"$default_plugin" != x"yes"; then
5642       AC_MSG_ERROR([
5643 Building GCC with plugin support requires a host that supports
5644 -fPIC, -shared, -ldl and -rdynamic.])
5645     fi
5646   fi
5647 fi
5648
5649 AC_SUBST(pluginlibs)
5650 AC_SUBST(enable_plugin)
5651 if test x"$enable_plugin" = x"yes"; then
5652   AC_DEFINE(ENABLE_PLUGIN, 1, [Define to enable plugin support.])
5653 fi
5654
5655
5656 # Enable --enable-host-shared
5657 AC_ARG_ENABLE(host-shared,
5658 [AS_HELP_STRING([--enable-host-shared],
5659                 [build host code as shared libraries])],
5660 [PICFLAG=-fPIC], [PICFLAG=])
5661 AC_SUBST(enable_host_shared)
5662 AC_SUBST(PICFLAG)
5663
5664
5665 AC_ARG_ENABLE(libquadmath-support,
5666 [AS_HELP_STRING([--disable-libquadmath-support],
5667   [disable libquadmath support for Fortran])],
5668 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
5669 ENABLE_LIBQUADMATH_SUPPORT=yes)
5670 if test "${ENABLE_LIBQUADMATH_SUPPORT}" != "no" ; then
5671   AC_DEFINE(ENABLE_LIBQUADMATH_SUPPORT, 1,
5672             [Define to 1 to enable libquadmath support])
5673 fi
5674
5675
5676 # Specify what hash style to use by default.
5677 AC_ARG_WITH([linker-hash-style],
5678 [AC_HELP_STRING([--with-linker-hash-style={sysv,gnu,both}],
5679                 [specify the linker hash style])],
5680 [case x"$withval" in
5681    xsysv)
5682      LINKER_HASH_STYLE=sysv
5683      ;;
5684    xgnu)
5685      LINKER_HASH_STYLE=gnu
5686      ;;
5687    xboth)
5688      LINKER_HASH_STYLE=both
5689      ;;
5690    *)
5691      AC_MSG_ERROR([$withval is an invalid option to --with-linker-hash-style])
5692      ;;
5693  esac],
5694 [LINKER_HASH_STYLE=''])
5695 if test x"${LINKER_HASH_STYLE}" != x; then
5696   AC_DEFINE_UNQUOTED(LINKER_HASH_STYLE, "$LINKER_HASH_STYLE",
5697                                          [The linker hash style])
5698 fi
5699
5700 # Configure the subdirectories
5701 # AC_CONFIG_SUBDIRS($subdirs)
5702
5703 # Create the Makefile
5704 # and configure language subdirectories
5705 AC_CONFIG_FILES($all_outputs)
5706
5707 AC_CONFIG_COMMANDS([default],
5708 [
5709 case ${CONFIG_HEADERS} in
5710   *auto-host.h:config.in*)
5711   echo > cstamp-h ;;
5712 esac
5713 # Make sure all the subdirs exist.
5714 for d in $subdirs doc build common c-family
5715 do
5716     test -d $d || mkdir $d
5717 done
5718 ],
5719 [subdirs='$subdirs'])
5720 AC_OUTPUT
5721