gcc/configure.ac

   1 # configure.ac for GCC
   2 # Process this file with autoconf to generate a configuration script.
   3
   4 # Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
   5 # 2007, 2008 Free Software Foundation, Inc.
   6
   7 #This file is part of GCC.
   8
   9 #GCC is free software; you can redistribute it and/or modify it under
  10 #the terms of the GNU General Public License as published by the Free
  11 #Software Foundation; either version 3, or (at your option) any later
  12 #version.
  13
  14 #GCC is distributed in the hope that it will be useful, but WITHOUT
  15 #ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16 #FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  17 #for more details.
  18
  19 #You should have received a copy of the GNU General Public License
  20 #along with GCC; see the file COPYING3.  If not see
  21 #<http://www.gnu.org/licenses/>.
  22
  23 # --------------------------------
  24 # Initialization and sanity checks
  25 # --------------------------------
  26
  27 AC_PREREQ(2.59)
  28 AC_INIT
  29 AC_CONFIG_SRCDIR(tree.c)
  30 AC_CONFIG_HEADER(auto-host.h:config.in)
  31
  32 gcc_version=`cat $srcdir/BASE-VER`
  33
  34 # Determine the host, build, and target systems
  35 AC_CANONICAL_BUILD
  36 AC_CANONICAL_HOST
  37 AC_CANONICAL_TARGET
  38
  39 # Determine the noncanonical target name, for directory use.
  40 ACX_NONCANONICAL_TARGET
  41
  42 # Determine the target- and build-specific subdirectories
  43 GCC_TOPLEV_SUBDIRS
  44
  45 # Set program_transform_name
  46 AC_ARG_PROGRAM
  47
  48 # Check for bogus environment variables.
  49 # Test if LIBRARY_PATH contains the notation for the current directory
  50 # since this would lead to problems installing/building glibc.
  51 # LIBRARY_PATH contains the current directory if one of the following
  52 # is true:
  53 # - one of the terminals (":" and ";") is the first or last sign
  54 # - two terminals occur directly after each other
  55 # - the path contains an element with a dot in it
  56 AC_MSG_CHECKING(LIBRARY_PATH variable)
  57 changequote(,)dnl
  58 case ${LIBRARY_PATH} in
  59   [:\;]* | *[:\;] | *[:\;][:\;]* |  *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
  60     library_path_setting="contains current directory"
  61     ;;
  62   *)
  63     library_path_setting="ok"
  64     ;;
  65 esac
  66 changequote([,])dnl
  67 AC_MSG_RESULT($library_path_setting)
  68 if test "$library_path_setting" != "ok"; then
  69 AC_MSG_ERROR([
  70 *** LIBRARY_PATH shouldn't contain the current directory when
  71 *** building gcc. Please change the environment variable
  72 *** and run configure again.])
  73 fi
  74
  75 # Test if GCC_EXEC_PREFIX contains the notation for the current directory
  76 # since this would lead to problems installing/building glibc.
  77 # GCC_EXEC_PREFIX contains the current directory if one of the following
  78 # is true:
  79 # - one of the terminals (":" and ";") is the first or last sign
  80 # - two terminals occur directly after each other
  81 # - the path contains an element with a dot in it
  82 AC_MSG_CHECKING(GCC_EXEC_PREFIX variable)
  83 changequote(,)dnl
  84 case ${GCC_EXEC_PREFIX} in
  85   [:\;]* | *[:\;] | *[:\;][:\;]* |  *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
  86     gcc_exec_prefix_setting="contains current directory"
  87     ;;
  88   *)
  89     gcc_exec_prefix_setting="ok"
  90     ;;
  91 esac
  92 changequote([,])dnl
  93 AC_MSG_RESULT($gcc_exec_prefix_setting)
  94 if test "$gcc_exec_prefix_setting" != "ok"; then
  95 AC_MSG_ERROR([
  96 *** GCC_EXEC_PREFIX shouldn't contain the current directory when
  97 *** building gcc. Please change the environment variable
  98 *** and run configure again.])
  99 fi
 100
 101 # -----------
 102 # Directories
 103 # -----------
 104
 105 # Specify the local prefix
 106 local_prefix=
 107 AC_ARG_WITH(local-prefix,
 108 [  --with-local-prefix=DIR specifies directory to put local include],
 109 [case "${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$local_prefix = x; then
 117         local_prefix=/usr/local
 118 fi
 119
 120 # Don't set gcc_gxx_include_dir to gxx_include_dir since that's only
 121 # passed in by the toplevel make and thus we'd get different behavior
 122 # depending on where we built the sources.
 123 gcc_gxx_include_dir=
 124 # Specify the g++ header file directory
 125 AC_ARG_WITH(gxx-include-dir,
 126 [  --with-gxx-include-dir=DIR
 127                           specifies directory to put g++ header files],
 128 [case "${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)$libstdcxx_incdir"
 144   fi
 145 fi
 146
 147 AC_ARG_WITH(cpp_install_dir,
 148 [  --with-cpp-install-dir=DIR
 149                           install the user visible C preprocessor in DIR
 150                           (relative to PREFIX) as well as PREFIX/bin],
 151 [if test x$withval = xyes; then
 152   AC_MSG_ERROR([option --with-cpp-install-dir requires an argument])
 153 elif test x$withval != xno; then
 154   cpp_install_dir=$withval
 155 fi])
 156
 157 # We would like to our source tree to be readonly.  However when releases or
 158 # pre-releases are generated, the flex/bison generated files as well as the
 159 # various formats of manuals need to be included along with the rest of the
 160 # sources.  Therefore we have --enable-generated-files-in-srcdir to do
 161 # just that.
 162
 163 AC_MSG_CHECKING([whether to place generated files in the source directory])
 164   dnl generated-files-in-srcdir is disabled by default
 165   AC_ARG_ENABLE(generated-files-in-srcdir,
 166 [  --enable-generated-files-in-srcdir
 167                           put copies of generated files in source dir
 168                           intended for creating source tarballs for users
 169                           without texinfo bison or flex.],
 170       generated_files_in_srcdir=$enableval,
 171       generated_files_in_srcdir=no)
 172
 173 AC_MSG_RESULT($generated_files_in_srcdir)
 174
 175 if test "$generated_files_in_srcdir" = "yes"; then
 176   GENINSRC=''
 177 else
 178   GENINSRC='#'
 179 fi
 180 AC_SUBST(GENINSRC)
 181
 182 # -------------------
 183 # Find default linker
 184 # -------------------
 185
 186 # With GNU ld
 187 AC_ARG_WITH(gnu-ld,
 188 [  --with-gnu-ld           arrange to work with GNU ld.],
 189 gnu_ld_flag="$with_gnu_ld",
 190 gnu_ld_flag=no)
 191
 192 # With pre-defined ld
 193 AC_ARG_WITH(ld,
 194 [  --with-ld               arrange to use the specified ld (full pathname)],
 195 DEFAULT_LINKER="$with_ld")
 196 if test x"${DEFAULT_LINKER+set}" = x"set"; then
 197   if test ! -x "$DEFAULT_LINKER"; then
 198     AC_MSG_ERROR([cannot execute: $DEFAULT_LINKER: check --with-ld or env. var. DEFAULT_LINKER])
 199   elif $DEFAULT_LINKER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
 200     gnu_ld_flag=yes
 201   fi
 202   AC_DEFINE_UNQUOTED(DEFAULT_LINKER,"$DEFAULT_LINKER",
 203         [Define to enable the use of a default linker.])
 204 fi
 205
 206 gnu_ld=`if test x"$gnu_ld_flag" = x"yes"; then echo 1; else echo 0; fi`
 207 AC_DEFINE_UNQUOTED(HAVE_GNU_LD, $gnu_ld, [Define if using GNU ld.])
 208
 209 AC_MSG_CHECKING([whether a default linker was specified])
 210 if test x"${DEFAULT_LINKER+set}" = x"set"; then
 211   if test x"$gnu_ld_flag" = x"no"; then
 212     AC_MSG_RESULT([yes ($DEFAULT_LINKER)])
 213   else
 214     AC_MSG_RESULT([yes ($DEFAULT_LINKER - GNU ld)])
 215   fi
 216 else
 217   AC_MSG_RESULT(no)
 218 fi
 219
 220 # With demangler in GNU ld
 221 AC_ARG_WITH(demangler-in-ld,
 222 [  --with-demangler-in-ld  try to use demangler in GNU ld.],
 223 demangler_in_ld="$with_demangler_in_ld",
 224 demangler_in_ld=no)
 225
 226 # ----------------------
 227 # Find default assembler
 228 # ----------------------
 229
 230 # With GNU as
 231 AC_ARG_WITH(gnu-as,
 232 [  --with-gnu-as           arrange to work with GNU as],
 233 gas_flag="$with_gnu_as",
 234 gas_flag=no)
 235
 236 AC_ARG_WITH(as,
 237 [  --with-as               arrange to use the specified as (full pathname)],
 238 DEFAULT_ASSEMBLER="$with_as")
 239 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
 240   if test ! -x "$DEFAULT_ASSEMBLER"; then
 241     AC_MSG_ERROR([cannot execute: $DEFAULT_ASSEMBLER: check --with-as or env. var. DEFAULT_ASSEMBLER])
 242   elif $DEFAULT_ASSEMBLER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
 243     gas_flag=yes
 244   fi
 245   AC_DEFINE_UNQUOTED(DEFAULT_ASSEMBLER,"$DEFAULT_ASSEMBLER",
 246         [Define to enable the use of a default assembler.])
 247 fi
 248
 249 gnu_as=`if test x"$gas_flag" = x"yes"; then echo 1; else echo 0; fi`
 250 AC_DEFINE_UNQUOTED(HAVE_GNU_AS, $gnu_as, [Define if using GNU as.])
 251
 252 AC_MSG_CHECKING([whether a default assembler was specified])
 253 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
 254   if test x"$gas_flag" = x"no"; then
 255     AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER)])
 256   else
 257     AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER - GNU as)])
 258   fi
 259 else
 260   AC_MSG_RESULT(no)
 261 fi
 262
 263 # ---------------
 264 # Find C compiler
 265 # ---------------
 266
 267 # If a non-executable a.out is present (e.g. created by GNU as above even if
 268 # invoked with -v only), the IRIX 6 native ld just overwrites the existing
 269 # file, even when creating an executable, so an execution test fails.
 270 # Remove possible default executable files to avoid this.
 271 #
 272 # FIXME: This really belongs into AC_PROG_CC and can be removed once
 273 # Autoconf includes it.
 274 rm -f a.out a.exe b.out
 275
 276 # Find the native compiler
 277 AC_PROG_CC
 278 AM_PROG_CC_C_O
 279 ACX_PROG_GNAT([-I"$srcdir"/ada])
 280
 281 # autoconf is lame and doesn't give us any substitution variable for this.
 282 if eval "test \"`echo '$ac_cv_prog_cc_'${ac_cc}_c_o`\" = no"; then
 283   NO_MINUS_C_MINUS_O=yes
 284 else
 285   OUTPUT_OPTION='-o $@'
 286 fi
 287 AC_SUBST(NO_MINUS_C_MINUS_O)
 288 AC_SUBST(OUTPUT_OPTION)
 289
 290 # Remove the -O2: for historical reasons, unless bootstrapping we prefer
 291 # optimizations to be activated explicitly by the toplevel.
 292 case "$CC" in
 293   */prev-gcc/xgcc*) ;;
 294   *) CFLAGS=`echo $CFLAGS | sed "s/-O[[s0-9]]* *//" ` ;;
 295 esac
 296 AC_SUBST(CFLAGS)
 297
 298 # -------------------------
 299 # Check C compiler features
 300 # -------------------------
 301
 302 AC_USE_SYSTEM_EXTENSIONS
 303 AC_PROG_CPP
 304 AC_C_INLINE
 305
 306 # sizeof(char) is 1 by definition.
 307 AC_CHECK_SIZEOF(void *)
 308 AC_CHECK_SIZEOF(short)
 309 AC_CHECK_SIZEOF(int)
 310 AC_CHECK_SIZEOF(long)
 311 AC_CHECK_TYPES([long long], [AC_CHECK_SIZEOF(long long)])
 312 AC_CHECK_TYPES([__int64], [AC_CHECK_SIZEOF(__int64)])
 313
 314 # ---------------------
 315 # Warnings and checking
 316 # ---------------------
 317
 318 # Check $CC warning features (if it's GCC).
 319 # We want to use -pedantic, but we don't want warnings about
 320 # * 'long long'
 321 # * variadic macros
 322 # * overlong strings
 323 # So, we only use -pedantic if we can disable those warnings.
 324
 325 ACX_PROG_CC_WARNING_OPTS([-W -Wall -Wwrite-strings -Wstrict-prototypes \
 326                           -Wmissing-prototypes], [loose_warn])
 327 ACX_PROG_CC_WARNING_OPTS([-Wc++-compat], [cxx_compat_warn])
 328 ACX_PROG_CC_WARNING_OPTS([-Wold-style-definition \
 329                           -Wmissing-format-attribute], [strict_warn])
 330 ACX_PROG_CC_WARNING_ALMOST_PEDANTIC([-Wno-long-long -Wno-variadic-macros \
 331                                      -Wno-overlength-strings], [strict_warn])
 332 ACX_PROG_CC_WARNINGS_ARE_ERRORS([manual], [strict_warn])
 333
 334 # The above macros do nothing if the compiler is not GCC.  However, the
 335 # Makefile has more goo to add other flags, so this variabl is used to
 336 # enables warnings only for GCC.
 337 warn_cflags=
 338 if test "x$GCC" = "xyes"; then
 339   warn_cflags='$(GCC_WARN_CFLAGS)'
 340 fi
 341 AC_SUBST(warn_cflags)
 342
 343 # Enable expensive internal checks
 344 is_release=
 345 if test x"`cat $srcdir/DEV-PHASE`" != xexperimental; then
 346   is_release=yes
 347 fi
 348
 349 AC_ARG_ENABLE(checking,
 350 [  --enable-checking[=LIST]
 351                           enable expensive run-time checks.  With LIST,
 352                           enable only specific categories of checks.
 353                           Categories are: yes,no,all,none,release.
 354                           Flags are: assert,df,fold,gc,gcac,misc,
 355                           rtlflag,rtl,runtime,tree,valgrind,types.],
 356 [ac_checking_flags="${enableval}"],[
 357 # Determine the default checks.
 358 if test x$is_release = x ; then
 359   ac_checking_flags=yes
 360 else
 361   ac_checking_flags=release
 362 fi])
 363 IFS="${IFS=     }"; ac_save_IFS="$IFS"; IFS="$IFS,"
 364 for check in release $ac_checking_flags
 365 do
 366         case $check in
 367         # these set all the flags to specific states
 368         yes)            ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking= ;
 369                         ac_fold_checking= ; ac_gc_checking=1 ;
 370                         ac_gc_always_collect= ; ac_rtl_checking= ;
 371                         ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
 372                         ac_tree_checking=1 ; ac_valgrind_checking= ;
 373                         ac_types_checking=1 ;;
 374         no|none)        ac_assert_checking= ; ac_checking= ; ac_df_checking= ;
 375                         ac_fold_checking= ; ac_gc_checking= ;
 376                         ac_gc_always_collect= ; ac_rtl_checking= ;
 377                         ac_rtlflag_checking= ; ac_runtime_checking= ;
 378                         ac_tree_checking= ; ac_valgrind_checking= ;
 379                         ac_types_checking= ;;
 380         all)            ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking=1 ;
 381                         ac_fold_checking=1 ; ac_gc_checking=1 ;
 382                         ac_gc_always_collect=1 ; ac_rtl_checking=1 ;
 383                         ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
 384                         ac_tree_checking=1 ; ac_valgrind_checking= ;
 385                         ac_types_checking=1 ;;
 386         release)        ac_assert_checking=1 ; ac_checking= ; ac_df_checking= ;
 387                         ac_fold_checking= ; ac_gc_checking= ;
 388                         ac_gc_always_collect= ; ac_rtl_checking= ;
 389                         ac_rtlflag_checking= ; ac_runtime_checking=1 ;
 390                         ac_tree_checking= ; ac_valgrind_checking= ;
 391                         ac_types_checking= ;;
 392         # these enable particular checks
 393         assert)         ac_assert_checking=1 ;;
 394         df)             ac_df_checking=1 ;;
 395         fold)           ac_fold_checking=1 ;;
 396         gc)             ac_gc_checking=1 ;;
 397         gcac)           ac_gc_always_collect=1 ;;
 398         misc)           ac_checking=1 ;;
 399         rtl)            ac_rtl_checking=1 ;;
 400         rtlflag)        ac_rtlflag_checking=1 ;;
 401         runtime)        ac_runtime_checking=1 ;;
 402         tree)           ac_tree_checking=1 ;;
 403         types)          ac_types_checking=1 ;;
 404         valgrind)       ac_valgrind_checking=1 ;;
 405         *)      AC_MSG_ERROR(unknown check category $check) ;;
 406         esac
 407 done
 408 IFS="$ac_save_IFS"
 409
 410 nocommon_flag=""
 411 if test x$ac_checking != x ; then
 412   AC_DEFINE(ENABLE_CHECKING, 1,
 413 [Define if you want more run-time sanity checks.  This one gets a grab
 414    bag of miscellaneous but relatively cheap checks.])
 415   nocommon_flag=-fno-common
 416 fi
 417 AC_SUBST(nocommon_flag)
 418 if test x$ac_df_checking != x ; then
 419   AC_DEFINE(ENABLE_DF_CHECKING, 1,
 420 [Define if you want more run-time sanity checks for dataflow.])
 421 fi
 422 if test x$ac_assert_checking != x ; then
 423   AC_DEFINE(ENABLE_ASSERT_CHECKING, 1,
 424 [Define if you want assertions enabled.  This is a cheap check.])
 425 fi
 426 GCC_TARGET_TEMPLATE(ENABLE_RUNTIME_CHECKING)
 427 if test x$ac_runtime_checking != x ; then
 428   AC_DEFINE(ENABLE_RUNTIME_CHECKING, 1,
 429 [Define if you want runtime assertions enabled.  This is a cheap check.])
 430 fi
 431 if test x$ac_tree_checking != x ; then
 432   AC_DEFINE(ENABLE_TREE_CHECKING, 1,
 433 [Define if you want all operations on trees (the basic data
 434    structure of the front ends) to be checked for dynamic type safety
 435    at runtime.  This is moderately expensive.  The tree browser debugging
 436    routines will also be enabled by this option.
 437    ])
 438   TREEBROWSER=tree-browser.o
 439 fi
 440 if test x$ac_types_checking != x ; then
 441   AC_DEFINE(ENABLE_TYPES_CHECKING, 1,
 442 [Define if you want all gimple types to be verified after gimplifiation.
 443    This is cheap.
 444    ])
 445 fi
 446 AC_SUBST(TREEBROWSER)
 447 if test x$ac_rtl_checking != x ; then
 448   AC_DEFINE(ENABLE_RTL_CHECKING, 1,
 449 [Define if you want all operations on RTL (the basic data structure
 450    of the optimizer and back end) to be checked for dynamic type safety
 451    at runtime.  This is quite expensive.])
 452 fi
 453 if test x$ac_rtlflag_checking != x ; then
 454   AC_DEFINE(ENABLE_RTL_FLAG_CHECKING, 1,
 455 [Define if you want RTL flag accesses to be checked against the RTL
 456    codes that are supported for each access macro.  This is relatively
 457    cheap.])
 458 fi
 459 if test x$ac_gc_checking != x ; then
 460   AC_DEFINE(ENABLE_GC_CHECKING, 1,
 461 [Define if you want the garbage collector to do object poisoning and
 462    other memory allocation checks.  This is quite expensive.])
 463 fi
 464 if test x$ac_gc_always_collect != x ; then
 465   AC_DEFINE(ENABLE_GC_ALWAYS_COLLECT, 1,
 466 [Define if you want the garbage collector to operate in maximally
 467    paranoid mode, validating the entire heap and collecting garbage at
 468    every opportunity.  This is extremely expensive.])
 469 fi
 470 if test x$ac_fold_checking != x ; then
 471   AC_DEFINE(ENABLE_FOLD_CHECKING, 1,
 472 [Define if you want fold checked that it never destructs its argument.
 473    This is quite expensive.])
 474 fi
 475 valgrind_path_defines=
 476 valgrind_command=
 477
 478 dnl # This check AC_REQUIREs various stuff, so it *must not* be inside
 479 dnl # an if statement.  This was the source of very frustrating bugs
 480 dnl # in converting to autoconf 2.5x!
 481 AC_CHECK_HEADER(valgrind.h, have_valgrind_h=yes, have_valgrind_h=no)
 482
 483 if test x$ac_valgrind_checking != x ; then
 484   # It is certainly possible that there's valgrind but no valgrind.h.
 485   # GCC relies on making annotations so we must have both.
 486   AC_MSG_CHECKING(for VALGRIND_DISCARD in <valgrind/memcheck.h>)
 487   AC_PREPROC_IFELSE([AC_LANG_SOURCE(
 488     [[#include <valgrind/memcheck.h>
 489 #ifndef VALGRIND_DISCARD
 490 #error VALGRIND_DISCARD not defined
 491 #endif]])],
 492   [gcc_cv_header_valgrind_memcheck_h=yes],
 493   [gcc_cv_header_valgrind_memcheck_h=no])
 494   AC_MSG_RESULT($gcc_cv_header_valgrind_memcheck_h)
 495   AC_MSG_CHECKING(for VALGRIND_DISCARD in <memcheck.h>)
 496   AC_PREPROC_IFELSE([AC_LANG_SOURCE(
 497     [[#include <memcheck.h>
 498 #ifndef VALGRIND_DISCARD
 499 #error VALGRIND_DISCARD not defined
 500 #endif]])],
 501   [gcc_cv_header_memcheck_h=yes],
 502   [gcc_cv_header_memcheck_h=no])
 503   AC_MSG_RESULT($gcc_cv_header_memcheck_h)
 504   AM_PATH_PROG_WITH_TEST(valgrind_path, valgrind,
 505         [$ac_dir/$ac_word --version | grep valgrind- >/dev/null 2>&1])
 506   if test "x$valgrind_path" = "x" \
 507     || (test $have_valgrind_h = no \
 508         && test $gcc_cv_header_memcheck_h = no \
 509         && test $gcc_cv_header_valgrind_memcheck_h = no); then
 510         AC_MSG_ERROR([*** Can't find both valgrind and valgrind/memcheck.h, memcheck.h or valgrind.h])
 511   fi
 512   valgrind_path_defines=-DVALGRIND_PATH='\"'$valgrind_path'\"'
 513   valgrind_command="$valgrind_path -q"
 514   AC_DEFINE(ENABLE_VALGRIND_CHECKING, 1,
 515 [Define if you want to run subprograms and generated programs
 516    through valgrind (a memory checker).  This is extremely expensive.])
 517   if test $gcc_cv_header_valgrind_memcheck_h = yes; then
 518     AC_DEFINE(HAVE_VALGRIND_MEMCHECK_H, 1,
 519         [Define if valgrind's valgrind/memcheck.h header is installed.])
 520   fi
 521   if test $gcc_cv_header_memcheck_h = yes; then
 522     AC_DEFINE(HAVE_MEMCHECK_H, 1,
 523         [Define if valgrind's memcheck.h header is installed.])
 524   fi
 525 fi
 526 AC_SUBST(valgrind_path_defines)
 527 AC_SUBST(valgrind_command)
 528
 529 # Enable code coverage collection
 530 AC_ARG_ENABLE(coverage,
 531 [  --enable-coverage[=LEVEL]
 532                           enable compiler's code coverage collection.
 533                           Use to measure compiler performance and locate
 534                           unused parts of the compiler. With LEVEL, specify
 535                           optimization. Values are opt, noopt,
 536                           default is noopt],
 537 [case "${enableval}" in
 538   yes|noopt)
 539     coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O0"
 540     ;;
 541   opt)
 542     coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O2"
 543     ;;
 544   no)
 545     # a.k.a. --disable-coverage
 546     coverage_flags=""
 547     ;;
 548   *)
 549     AC_MSG_ERROR(unknown coverage setting $enableval)
 550     ;;
 551 esac],
 552 [coverage_flags=""])
 553 AC_SUBST(coverage_flags)
 554
 555 AC_ARG_ENABLE(gather-detailed-mem-stats,
 556 [  --enable-gather-detailed-mem-stats         enable detailed memory allocation stats gathering], [],
 557 [enable_gather_detailed_mem_stats=no])
 558 if test x$enable_gather_detailed_mem_stats = xyes ; then
 559   AC_DEFINE(GATHER_STATISTICS, 1,
 560         [Define to enable detailed memory allocation stats gathering.])
 561 fi
 562
 563 # -------------------------------
 564 # Miscenalleous configure options
 565 # -------------------------------
 566
 567 # With stabs
 568 AC_ARG_WITH(stabs,
 569 [  --with-stabs            arrange to use stabs instead of host debug format],
 570 stabs="$with_stabs",
 571 stabs=no)
 572
 573 # Determine whether or not multilibs are enabled.
 574 AC_ARG_ENABLE(multilib,
 575 [  --enable-multilib       enable library support for multiple ABIs],
 576 [], [enable_multilib=yes])
 577 AC_SUBST(enable_multilib)
 578
 579 # Enable __cxa_atexit for C++.
 580 AC_ARG_ENABLE(__cxa_atexit,
 581 [  --enable-__cxa_atexit   enable __cxa_atexit for C++],
 582 [], [])
 583
 584 # Enable C extension for decimal float if target supports it.
 585 AC_ARG_ENABLE(decimal-float,
 586 [  --enable-decimal-float={no,yes,bid,dpd}
 587                         enable decimal float extension to C.  Selecting 'bid'
 588                         or 'dpd' choses which decimal floating point format
 589                         to use],
 590 [
 591   case $enable_decimal_float in
 592     yes | no | bid | dpd) ;;
 593     *) AC_MSG_ERROR(['$enable_decimal_float' is an invalid value for --enable-decimal-float.
 594 Valid choices are 'yes', 'bid', 'dpd', and 'no'.]) ;;
 595   esac
 596 ],
 597 [
 598   case $target in
 599     powerpc*-*-linux* | i?86*-*-linux* | x86_64*-*-linux*)
 600       enable_decimal_float=yes
 601       ;;
 602     *)
 603       AC_MSG_WARN(decimal float is not supported for this target, ignored)
 604       enable_decimal_float=no
 605       ;;
 606   esac
 607 ])
 608
 609 dfp=`if test $enable_decimal_float != no; then echo 1; else echo 0; fi`
 610 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_FLOAT, $dfp,
 611 [Define to 1 to enable decimal float extension to C.])
 612
 613 # x86's use BID format instead of DPD
 614 case x$enable_decimal_float in
 615   xyes)
 616     case $target in
 617       i?86*-*-linux* | x86_64*-*-linux*)
 618         enable_decimal_float=bid
 619         ;;
 620       *)
 621         enable_decimal_float=dpd
 622         ;;
 623     esac
 624     ;;
 625   xno)
 626     # ENABLE_DECIMAL_FLOAT is set to 0. But we have to have proper
 627     # dependency on libdecnumber.
 628     enable_decimal_float=dpd
 629     ;;
 630 esac
 631 AC_SUBST(enable_decimal_float)
 632
 633 bid=`if test $enable_decimal_float = bid; then echo 1; else echo 0; fi`
 634 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_BID_FORMAT, $bid,
 635 [Define to 1 to specify that we are using the BID decimal floating
 636 point format instead of DPD])
 637
 638 # Enable C extension for fixed-point arithmetic.
 639 AC_ARG_ENABLE(fixed-point,
 640 [  --enable-fixed-point    enable fixed-point arithmetic extension to C],
 641 [
 642 ],
 643 [
 644   case $target in
 645     mips*-*-*)
 646       case $host in
 647         mips*-sgi-irix*)
 648           AC_MSG_WARN(fixed-point is not supported on IRIX, ignored)
 649           enable_fixed_point=no
 650           ;;
 651         *)
 652           enable_fixed_point=yes
 653           ;;
 654       esac
 655       ;;
 656     *)
 657       AC_MSG_WARN(fixed-point is not supported for this target, ignored)
 658       enable_fixed_point=no
 659       ;;
 660   esac
 661 ])
 662 AC_SUBST(enable_fixed_point)
 663
 664 fixedpoint=`if test $enable_fixed_point = yes; then echo 1; else echo 0; fi`
 665 AC_DEFINE_UNQUOTED(ENABLE_FIXED_POINT, $fixedpoint,
 666 [Define to 1 to enable fixed-point arithmetic extension to C.])
 667
 668 # Enable threads
 669 # Pass with no value to take the default
 670 # Pass with a value to specify a thread package
 671 AC_ARG_ENABLE(threads,
 672 [  --enable-threads        enable thread usage for target GCC
 673   --enable-threads=LIB    use LIB thread package for target GCC],,
 674 [enable_threads=''])
 675
 676 AC_ARG_ENABLE(tls,
 677 [  --enable-tls            enable or disable generation of tls code
 678                           overriding the assembler check for tls support],
 679 [
 680   case $enable_tls in
 681     yes | no) ;;
 682     *) AC_MSG_ERROR(['$enable_tls' is an invalid value for --enable-tls.
 683 Valid choices are 'yes' and 'no'.]) ;;
 684   esac
 685 ], [enable_tls=''])
 686
 687 AC_ARG_ENABLE(objc-gc,
 688 [  --enable-objc-gc       enable the use of Boehm's garbage collector with
 689                           the GNU Objective-C runtime],
 690 if test x$enable_objc_gc = xno; then
 691         objc_boehm_gc=''
 692 else
 693         objc_boehm_gc=1
 694 fi,
 695 objc_boehm_gc='')
 696
 697 AC_ARG_WITH(dwarf2,
 698 [  --with-dwarf2           force the default debug format to be DWARF 2],
 699 dwarf2="$with_dwarf2",
 700 dwarf2=no)
 701
 702 AC_ARG_ENABLE(shared,
 703 [  --disable-shared        don't provide a shared libgcc],
 704 [
 705   case $enable_shared in
 706   yes | no) ;;
 707   *)
 708     enable_shared=no
 709     IFS="${IFS=         }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
 710     for pkg in $enableval; do
 711       if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
 712         enable_shared=yes
 713       fi
 714     done
 715     IFS="$ac_save_ifs"
 716     ;;
 717   esac
 718 ], [enable_shared=yes])
 719 AC_SUBST(enable_shared)
 720
 721 AC_ARG_WITH(build-sysroot,
 722   [  --with-build-sysroot=sysroot
 723                           use sysroot as the system root during the build])
 724
 725 AC_ARG_WITH(sysroot,
 726 [  --with-sysroot[=DIR] Search for usr/lib, usr/include, et al, within DIR.],
 727 [
 728  case ${with_sysroot} in
 729  yes) TARGET_SYSTEM_ROOT='${exec_prefix}/${target_noncanonical}/sys-root' ;;
 730  *) TARGET_SYSTEM_ROOT=$with_sysroot ;;
 731  esac
 732
 733  TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"$(TARGET_SYSTEM_ROOT)\"'
 734  CROSS_SYSTEM_HEADER_DIR='$(TARGET_SYSTEM_ROOT)$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
 735
 736  if test "x$prefix" = xNONE; then
 737   test_prefix=/usr/local
 738  else
 739   test_prefix=$prefix
 740  fi
 741  if test "x$exec_prefix" = xNONE; then
 742   test_exec_prefix=$test_prefix
 743  else
 744   test_exec_prefix=$exec_prefix
 745  fi
 746  case ${TARGET_SYSTEM_ROOT} in
 747  "${test_prefix}"|"${test_prefix}/"*|\
 748  "${test_exec_prefix}"|"${test_exec_prefix}/"*|\
 749  '${prefix}'|'${prefix}/'*|\
 750  '${exec_prefix}'|'${exec_prefix}/'*)
 751    t="$TARGET_SYSTEM_ROOT_DEFINE -DTARGET_SYSTEM_ROOT_RELOCATABLE"
 752    TARGET_SYSTEM_ROOT_DEFINE="$t"
 753    ;;
 754  esac
 755 ], [
 756  TARGET_SYSTEM_ROOT=
 757  TARGET_SYSTEM_ROOT_DEFINE=
 758  CROSS_SYSTEM_HEADER_DIR='$(gcc_tooldir)/sys-include'
 759 ])
 760 AC_SUBST(TARGET_SYSTEM_ROOT)
 761 AC_SUBST(TARGET_SYSTEM_ROOT_DEFINE)
 762 AC_SUBST(CROSS_SYSTEM_HEADER_DIR)
 763
 764 # Build with intermodule optimisations
 765 AC_ARG_ENABLE(intermodule,
 766 [  --enable-intermodule    build the compiler in one step],
 767 [case ${enable_intermodule} in
 768   yes) onestep="-onestep";;
 769   *) onestep="";;
 770 esac],
 771 [onestep=""])
 772 AC_SUBST(onestep)
 773
 774 ACX_PKGVERSION([GCC])
 775 ACX_BUGURL([http://gcc.gnu.org/bugs.html])
 776
 777 # Sanity check enable_languages in case someone does not run the toplevel
 778 # configure # script.
 779 AC_ARG_ENABLE(languages,
 780 [  --enable-languages=LIST specify which front-ends to build],
 781 [case ,${enable_languages}, in
 782        ,,|,yes,)
 783                 # go safe -- we cannot be much sure without the toplevel
 784                 # configure's
 785                 # analysis of which target libs are present and usable
 786                 enable_languages=c
 787                 ;;
 788          *,all,*)
 789                 AC_MSG_ERROR([only the toplevel supports --enable-languages=all])
 790                 ;;
 791         *,c,*)
 792                 ;;
 793         *)
 794                 enable_languages=c,${enable_languages}
 795                 ;;
 796 esac],
 797 [enable_languages=c])
 798
 799 # Used by documentation targets
 800 AC_SUBST(datarootdir)
 801 AC_SUBST(docdir)
 802 AC_SUBST(htmldir)
 803
 804 # -------------------------
 805 # Checks for other programs
 806 # -------------------------
 807
 808 AC_PROG_MAKE_SET
 809
 810 # Find some useful tools
 811 AC_PROG_AWK
 812 # We need awk to create options.c and options.h.
 813 # Bail out if it's missing.
 814 case ${AWK} in
 815   "") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
 816 esac
 817
 818 gcc_AC_PROG_LN_S
 819 ACX_PROG_LN($LN_S)
 820 AC_PROG_RANLIB
 821 case "${host}" in
 822 *-*-darwin*)
 823   # By default, the Darwin ranlib will not treat common symbols as
 824   # definitions when  building the archive table of contents.  Other
 825   # ranlibs do that; pass an option to the Darwin ranlib that makes
 826   # it behave similarly.
 827   ranlib_flags="-c"
 828   ;;
 829 *)
 830   ranlib_flags=""
 831 esac
 832 AC_SUBST(ranlib_flags)
 833
 834 gcc_AC_PROG_INSTALL
 835
 836 # See if cmp has --ignore-initial.
 837 gcc_AC_PROG_CMP_IGNORE_INITIAL
 838
 839 # See if we have the mktemp command.
 840 AC_CHECK_PROG(have_mktemp_command, mktemp, yes, no)
 841
 842 # See if makeinfo has been installed and is modern enough
 843 # that we can use it.
 844 ACX_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
 845   [GNU texinfo.* \([0-9][0-9.]*\)],
 846   [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
 847 if test $gcc_cv_prog_makeinfo_modern = no; then
 848   AC_MSG_WARN([
 849 *** Makeinfo is missing or too old.
 850 *** Info documentation will not be built.])
 851   BUILD_INFO=
 852 else
 853   BUILD_INFO=info
 854 fi
 855 AC_SUBST(BUILD_INFO)
 856
 857 # Is pod2man recent enough to regenerate manpages?
 858 AC_MSG_CHECKING([for recent Pod::Man])
 859 if (perl -e 'use 1.10 Pod::Man') >/dev/null 2>&1; then
 860   AC_MSG_RESULT(yes)
 861   GENERATED_MANPAGES=generated-manpages
 862 else
 863   AC_MSG_RESULT(no)
 864   GENERATED_MANPAGES=
 865 fi
 866 AC_SUBST(GENERATED_MANPAGES)
 867
 868 MISSING="${CONFIG_SHELL-/bin/sh} $ac_aux_dir/missing"
 869
 870 # How about lex?
 871 dnl Don't use AC_PROG_LEX; we insist on flex.
 872 dnl LEXLIB is not useful in gcc.
 873 AC_CHECK_PROGS([FLEX], flex, [$MISSING flex])
 874
 875 # Bison?
 876 AC_CHECK_PROGS([BISON], bison, [$MISSING bison])
 877
 878 # Binutils are not build modules, unlike bison/flex/makeinfo.  So we
 879 # check for build == host before using them.
 880
 881 # NM
 882 if test x${build} = x${host} && test -f $srcdir/../binutils/nm.c \
 883   && test -d ../binutils ; then
 884   NM='$(objdir)/../binutils/nm-new'
 885 else
 886   AC_CHECK_PROG(NM, nm, nm, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing nm)
 887 fi
 888
 889 # AR
 890 if test x${build} = x${host} && test -f $srcdir/../binutils/ar.c \
 891   && test -d ../binutils ; then
 892   AR='$(objdir)/../binutils/ar'
 893 else
 894   AC_CHECK_PROG(AR, ar, ar, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing ar)
 895 fi
 896
 897
 898 # --------------------
 899 # Checks for C headers
 900 # --------------------
 901
 902 # Need to reject headers which give warnings, so that the -Werror bootstrap
 903 # works later. *sigh*  This needs to come before all header checks.
 904 AC_PROG_CPP_WERROR
 905
 906 AC_HEADER_STDC
 907 AC_HEADER_TIME
 908 ACX_HEADER_STRING
 909 AC_HEADER_SYS_WAIT
 910 AC_CHECK_HEADERS(limits.h stddef.h string.h strings.h stdlib.h time.h iconv.h \
 911                  fcntl.h unistd.h sys/file.h sys/time.h sys/mman.h \
 912                  sys/resource.h sys/param.h sys/times.h sys/stat.h \
 913                  direct.h malloc.h langinfo.h ldfcn.h locale.h wchar.h)
 914
 915 # Check for thread headers.
 916 AC_CHECK_HEADER(thread.h, [have_thread_h=yes], [have_thread_h=])
 917 AC_CHECK_HEADER(pthread.h, [have_pthread_h=yes], [have_pthread_h=])
 918
 919 # These tests can't be done till we know if we have limits.h.
 920 gcc_AC_C_CHAR_BIT
 921 AC_C_BIGENDIAN
 922
 923 # --------
 924 # UNSORTED
 925 # --------
 926
 927
 928 # These libraries may be used by collect2.
 929 # We may need a special search path to get them linked.
 930 AC_CACHE_CHECK(for collect2 libraries, gcc_cv_collect2_libs,
 931 [save_LIBS="$LIBS"
 932 for libs in '' -lld -lmld \
 933                 '-L/usr/lib/cmplrs/cc2.11 -lmld' \
 934                 '-L/usr/lib/cmplrs/cc3.11 -lmld'
 935 do
 936         LIBS="$libs"
 937         AC_TRY_LINK_FUNC(ldopen,
 938                 [gcc_cv_collect2_libs="$libs"; break])
 939 done
 940 LIBS="$save_LIBS"
 941 test -z "$gcc_cv_collect2_libs" && gcc_cv_collect2_libs='none required'])
 942 case $gcc_cv_collect2_libs in
 943         "none required")        ;;
 944         *)      COLLECT2_LIBS=$gcc_cv_collect2_libs ;;
 945 esac
 946 AC_SUBST(COLLECT2_LIBS)
 947
 948 # When building Ada code on Alpha, we need exc_resume which is usually in
 949 # -lexc.  So test for it.
 950 save_LIBS="$LIBS"
 951 LIBS=
 952 AC_SEARCH_LIBS(exc_resume, exc)
 953 GNAT_LIBEXC="$LIBS"
 954 LIBS="$save_LIBS"
 955 AC_SUBST(GNAT_LIBEXC)
 956
 957 # Some systems put ldexp and frexp in libm instead of libc; assume
 958 # they're both in the same place.  jcf-dump needs them.
 959 save_LIBS="$LIBS"
 960 LIBS=
 961 AC_SEARCH_LIBS(ldexp, m)
 962 LDEXP_LIB="$LIBS"
 963 LIBS="$save_LIBS"
 964 AC_SUBST(LDEXP_LIB)
 965
 966 # Use <inttypes.h> only if it exists,
 967 # doesn't clash with <sys/types.h>, and declares intmax_t.
 968 AC_MSG_CHECKING(for inttypes.h)
 969 AC_CACHE_VAL(gcc_cv_header_inttypes_h,
 970 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
 971 [[#include <sys/types.h>
 972 #include <inttypes.h>]],
 973   [[intmax_t i = -1;]])],
 974   [gcc_cv_header_inttypes_h=yes],
 975   [gcc_cv_header_inttypes_h=no])])
 976 AC_MSG_RESULT($gcc_cv_header_inttypes_h)
 977 if test $gcc_cv_header_inttypes_h = yes; then
 978   AC_DEFINE(HAVE_INTTYPES_H, 1,
 979         [Define if you have a working <inttypes.h> header file.])
 980 fi
 981
 982 dnl Disabled until we have a complete test for buggy enum bitfields.
 983 dnl gcc_AC_C_ENUM_BF_UNSIGNED
 984
 985 define(gcc_UNLOCKED_FUNCS, clearerr_unlocked feof_unlocked dnl
 986   ferror_unlocked fflush_unlocked fgetc_unlocked fgets_unlocked dnl
 987   fileno_unlocked fprintf_unlocked fputc_unlocked fputs_unlocked dnl
 988   fread_unlocked fwrite_unlocked getchar_unlocked getc_unlocked dnl
 989   putchar_unlocked putc_unlocked)
 990 AC_CHECK_FUNCS(times clock kill getrlimit setrlimit atoll atoq \
 991         sysconf strsignal getrusage nl_langinfo scandir alphasort \
 992         gettimeofday mbstowcs wcswidth mmap mincore setlocale \
 993         gcc_UNLOCKED_FUNCS)
 994
 995 if test x$ac_cv_func_mbstowcs = xyes; then
 996   AC_CACHE_CHECK(whether mbstowcs works, gcc_cv_func_mbstowcs_works,
 997 [    AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <stdlib.h>
 998 int main()
 999 {
1000   mbstowcs(0, "", 0);
1001   return 0;
1002 }]])],
1003     [gcc_cv_func_mbstowcs_works=yes],
1004     [gcc_cv_func_mbstowcs_works=no],
1005     [gcc_cv_func_mbstowcs_works=yes])])
1006   if test x$gcc_cv_func_mbstowcs_works = xyes; then
1007     AC_DEFINE(HAVE_WORKING_MBSTOWCS, 1,
1008   [Define this macro if mbstowcs does not crash when its
1009    first argument is NULL.])
1010   fi
1011 fi
1012
1013 AC_CHECK_TYPE(ssize_t, int)
1014
1015 # Try to determine the array type of the second argument of getgroups
1016 # for the target system (int or gid_t).
1017 AC_TYPE_GETGROUPS
1018 if test "${target}" = "${build}"; then
1019   TARGET_GETGROUPS_T=$ac_cv_type_getgroups
1020 else
1021   case "${target}" in
1022         # This condition may need some tweaking.  It should include all
1023         # targets where the array type of the second argument of getgroups
1024         # is int and the type of gid_t is not equivalent to int.
1025         *-*-sunos* | *-*-ultrix*)
1026                 TARGET_GETGROUPS_T=int
1027                 ;;
1028         *)
1029                 TARGET_GETGROUPS_T=gid_t
1030                 ;;
1031   esac
1032 fi
1033 AC_SUBST(TARGET_GETGROUPS_T)
1034
1035 gcc_AC_FUNC_MMAP_BLACKLIST
1036
1037 case "${host}" in
1038 *-*-*vms*)
1039   # Under VMS, vfork works very differently than on Unix. The standard test
1040   # won't work, and it isn't easily adaptable. It makes more sense to
1041   # just force it.
1042   ac_cv_func_vfork_works=yes
1043   ;;
1044 esac
1045 AC_FUNC_FORK
1046
1047 AM_ICONV
1048 # Until we have in-tree GNU iconv:
1049 LIBICONV_DEP=
1050 AC_SUBST(LIBICONV_DEP)
1051
1052 AM_LC_MESSAGES
1053
1054 AM_LANGINFO_CODESET
1055
1056 # We will need to find libiberty.h and ansidecl.h
1057 saved_CFLAGS="$CFLAGS"
1058 CFLAGS="$CFLAGS -I${srcdir} -I${srcdir}/../include"
1059 gcc_AC_CHECK_DECLS(getenv atol asprintf sbrk abort atof getcwd getwd \
1060         strsignal strstr strverscmp \
1061         errno snprintf vsnprintf vasprintf malloc realloc calloc \
1062         free basename getopt clock getpagesize gcc_UNLOCKED_FUNCS, , ,[
1063 #include "ansidecl.h"
1064 #include "system.h"])
1065
1066 gcc_AC_CHECK_DECLS(getrlimit setrlimit getrusage, , ,[
1067 #include "ansidecl.h"
1068 #include "system.h"
1069 #ifdef HAVE_SYS_RESOURCE_H
1070 #include <sys/resource.h>
1071 #endif
1072 ])
1073
1074 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1075 #include "ansidecl.h"
1076 #include "system.h"
1077 #ifdef HAVE_SYS_RESOURCE_H
1078 #include <sys/resource.h>
1079 #endif
1080 ]], [[rlim_t l = 0;]])],[],[AC_DEFINE([rlim_t],[long],
1081 [Define to \`long' if <sys/resource.h> doesn't define.])])
1082
1083 # On AIX 5.2, <ldfcn.h> conflicts with <fcntl.h>, as both define incompatible
1084 # FREAD and FWRITE macros.  Fortunately, for GCC's single usage of ldgetname
1085 # in collect2.c, <fcntl.h> isn't visible, but the configure test below needs
1086 # to undef these macros to get the correct value for HAVE_DECL_LDGETNAME.
1087 gcc_AC_CHECK_DECLS(ldgetname, , ,[
1088 #include "ansidecl.h"
1089 #include "system.h"
1090 #ifdef HAVE_LDFCN_H
1091 #undef FREAD
1092 #undef FWRITE
1093 #include <ldfcn.h>
1094 #endif
1095 ])
1096
1097 gcc_AC_CHECK_DECLS(times, , ,[
1098 #include "ansidecl.h"
1099 #include "system.h"
1100 #ifdef HAVE_SYS_TIMES_H
1101 #include <sys/times.h>
1102 #endif
1103 ])
1104
1105 gcc_AC_CHECK_DECLS(sigaltstack, , ,[
1106 #include "ansidecl.h"
1107 #include "system.h"
1108 #include <signal.h>
1109 ])
1110
1111 # More time-related stuff.
1112 AC_CACHE_CHECK(for struct tms, ac_cv_struct_tms, [
1113 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1114 #include "ansidecl.h"
1115 #include "system.h"
1116 #ifdef HAVE_SYS_TIMES_H
1117 #include <sys/times.h>
1118 #endif
1119 ]], [[struct tms tms;]])],[ac_cv_struct_tms=yes],[ac_cv_struct_tms=no])])
1120 if test $ac_cv_struct_tms = yes; then
1121   AC_DEFINE(HAVE_STRUCT_TMS, 1,
1122   [Define if <sys/times.h> defines struct tms.])
1123 fi
1124
1125 # use gcc_cv_* here because this doesn't match the behavior of AC_CHECK_TYPE.
1126 # revisit after autoconf 2.50.
1127 AC_CACHE_CHECK(for clock_t, gcc_cv_type_clock_t, [
1128 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1129 #include "ansidecl.h"
1130 #include "system.h"
1131 ]], [[clock_t x;]])],[gcc_cv_type_clock_t=yes],[gcc_cv_type_clock_t=no])])
1132 if test $gcc_cv_type_clock_t = yes; then
1133   AC_DEFINE(HAVE_CLOCK_T, 1,
1134   [Define if <time.h> defines clock_t.])
1135 fi
1136
1137 # Restore CFLAGS from before the gcc_AC_NEED_DECLARATIONS tests.
1138 CFLAGS="$saved_CFLAGS"
1139
1140 gcc_AC_INITFINI_ARRAY
1141
1142 # mkdir takes a single argument on some systems.
1143 gcc_AC_FUNC_MKDIR_TAKES_ONE_ARG
1144
1145 # File extensions
1146 manext='.1'
1147 objext='.o'
1148 AC_SUBST(manext)
1149 AC_SUBST(objext)
1150
1151 # With Setjmp/Longjmp based exception handling.
1152 AC_ARG_ENABLE(sjlj-exceptions,
1153 [  --enable-sjlj-exceptions
1154                           arrange to use setjmp/longjmp exception handling],
1155 [case $target in
1156   *-*-hpux10*)
1157     if test $enableval != yes; then
1158       AC_MSG_WARN([dwarf2 exceptions not supported, sjlj exceptions forced])
1159       enableval=yes
1160     fi
1161     ;;
1162 esac
1163 force_sjlj_exceptions=yes],
1164 [case $target in
1165   *-*-hpux10*)
1166     force_sjlj_exceptions=yes
1167     enableval=yes
1168     ;;
1169   *)
1170     force_sjlj_exceptions=no
1171     ;;
1172 esac])
1173 if test $force_sjlj_exceptions = yes; then
1174   sjlj=`if test $enableval = yes; then echo 1; else echo 0; fi`
1175   AC_DEFINE_UNQUOTED(CONFIG_SJLJ_EXCEPTIONS, $sjlj,
1176     [Define 0/1 to force the choice for exception handling model.])
1177 fi
1178
1179 # For platforms with the unwind ABI which includes an unwind library,
1180 # libunwind, we can choose to use the system libunwind.
1181 AC_ARG_WITH(system-libunwind,
1182 [  --with-system-libunwind use installed libunwind])
1183
1184 # config.gcc also contains tests of with_system_libunwind.
1185 if test x$with_system_libunwind = xyes; then
1186         AC_DEFINE(HAVE_GETIPINFO, 1,
1187 [Define to 1 if system unwind library has _Unwind_GetIPInfo.])
1188 fi
1189
1190 # --------------------------------------------------------
1191 # Build, host, and target specific configuration fragments
1192 # --------------------------------------------------------
1193
1194 # Collect build-machine-specific information.
1195 . ${srcdir}/config.build
1196
1197 # Collect host-machine-specific information.
1198 . ${srcdir}/config.host
1199
1200 target_gtfiles=
1201
1202 # Collect target-machine-specific information.
1203 . ${srcdir}/config.gcc
1204
1205 extra_objs="${host_extra_objs} ${extra_objs}"
1206 extra_gcc_objs="${host_extra_gcc_objs} ${extra_gcc_objs}"
1207
1208 # Default the target-machine variables that were not explicitly set.
1209 if test x"$tm_file" = x
1210 then tm_file=$cpu_type/$cpu_type.h; fi
1211
1212 if test x"$extra_headers" = x
1213 then extra_headers=; fi
1214
1215 if test x$md_file = x
1216 then md_file=$cpu_type/$cpu_type.md; fi
1217
1218 if test x$out_file = x
1219 then out_file=$cpu_type/$cpu_type.c; fi
1220
1221 if test x"$tmake_file" = x
1222 then tmake_file=$cpu_type/t-$cpu_type
1223 fi
1224
1225 if test x"$dwarf2" = xyes
1226 then tm_file="$tm_file tm-dwarf2.h"
1227 fi
1228
1229 # Say what files are being used for the output code and MD file.
1230 echo "Using \`$srcdir/config/$out_file' for machine-specific logic."
1231 echo "Using \`$srcdir/config/$md_file' as machine description file."
1232
1233 # If any of the xm_file variables contain nonexistent files, warn
1234 # about them and drop them.
1235
1236 bx=
1237 for x in $build_xm_file; do
1238   if    test -f $srcdir/config/$x
1239   then      bx="$bx $x"
1240   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1241   fi
1242 done
1243 build_xm_file="$bx"
1244
1245 hx=
1246 for x in $host_xm_file; do
1247   if    test -f $srcdir/config/$x
1248   then      hx="$hx $x"
1249   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1250   fi
1251 done
1252 host_xm_file="$hx"
1253
1254 tx=
1255 for x in $xm_file; do
1256   if    test -f $srcdir/config/$x
1257   then      tx="$tx $x"
1258   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1259   fi
1260 done
1261 xm_file="$tx"
1262
1263 count=a
1264 for f in $tm_file; do
1265         count=${count}x
1266 done
1267 if test $count = ax; then
1268         echo "Using \`$srcdir/config/$tm_file' as target machine macro file."
1269 else
1270         echo "Using the following target machine macro files:"
1271         for f in $tm_file; do
1272                 echo "  $srcdir/config/$f"
1273         done
1274 fi
1275
1276 if test x$need_64bit_hwint = xyes; then
1277         AC_DEFINE(NEED_64BIT_HOST_WIDE_INT, 1,
1278 [Define to 1 if HOST_WIDE_INT must be 64 bits wide (see hwint.h).])
1279 fi
1280
1281 if test x$use_long_long_for_widest_fast_int = xyes; then
1282         AC_DEFINE(USE_LONG_LONG_FOR_WIDEST_FAST_INT, 1,
1283 [Define to 1 if the 'long long' (or '__int64') is wider than 'long' but still
1284 efficiently supported by the host hardware.])
1285 fi
1286
1287 count=a
1288 for f in $host_xm_file; do
1289         count=${count}x
1290 done
1291 if test $count = a; then
1292         :
1293 elif test $count = ax; then
1294         echo "Using \`$srcdir/config/$host_xm_file' as host machine macro file."
1295 else
1296         echo "Using the following host machine macro files:"
1297         for f in $host_xm_file; do
1298                 echo "  $srcdir/config/$f"
1299         done
1300 fi
1301 echo "Using ${out_host_hook_obj} for host machine hooks."
1302
1303 if test "$host_xm_file" != "$build_xm_file"; then
1304         count=a
1305         for f in $build_xm_file; do
1306                 count=${count}x
1307         done
1308         if test $count = a; then
1309                 :
1310         elif test $count = ax; then
1311                 echo "Using \`$srcdir/config/$build_xm_file' as build machine macro file."
1312         else
1313                 echo "Using the following build machine macro files:"
1314                 for f in $build_xm_file; do
1315                         echo "  $srcdir/config/$f"
1316                 done
1317         fi
1318 fi
1319
1320 case ${host} in
1321   powerpc*-*-darwin*)
1322     AC_CACHE_CHECK([whether mcontext_t fields have underscores],
1323       gcc_cv_mcontext_underscores,
1324       AC_COMPILE_IFELSE([
1325 #include <sys/cdefs.h>
1326 #include <sys/signal.h>
1327 #include <ucontext.h>
1328 int main() { mcontext_t m; if (m->ss.srr0) return 0; return 0; }
1329 ],
1330         gcc_cv_mcontext_underscores=no, gcc_cv_mcontext_underscores=yes))
1331       if test $gcc_cv_mcontext_underscores = yes; then
1332         AC_DEFINE(HAS_MCONTEXT_T_UNDERSCORES,,dnl
1333           [mcontext_t fields start with __])
1334       fi
1335     ;;
1336 esac
1337
1338 # ---------
1339 # Threading
1340 # ---------
1341
1342 # Check if a valid thread package
1343 case ${enable_threads} in
1344   "" | no)
1345     # No threads
1346     target_thread_file='single'
1347     ;;
1348   yes)
1349     # default
1350     target_thread_file='single'
1351     ;;
1352   aix | dce | gnat | irix | posix | posix95 | rtems | \
1353   single | solaris | vxworks | win32 | mipssde)
1354     target_thread_file=${enable_threads}
1355     ;;
1356   *)
1357     echo "${enable_threads} is an unknown thread package" 1>&2
1358     exit 1
1359     ;;
1360 esac
1361
1362 if test x${thread_file} = x; then
1363   # No thread file set by target-specific clauses in config.gcc,
1364   # so use file chosen by default logic above
1365   thread_file=${target_thread_file}
1366 fi
1367
1368 # Make gthr-default.h if we have a thread file.
1369 gthread_flags=
1370 if test $thread_file != single; then
1371   rm -f gthr-default.h
1372   echo "#include \"gthr-${thread_file}.h\"" > gthr-default.h
1373   gthread_flags=-DHAVE_GTHR_DEFAULT
1374 fi
1375 AC_SUBST(gthread_flags)
1376
1377 # --------
1378 # UNSORTED
1379 # --------
1380
1381 use_cxa_atexit=no
1382 if test x$enable___cxa_atexit = xyes || \
1383    test x$enable___cxa_atexit = x -a x$default_use_cxa_atexit = xyes; then
1384   if test x$host = x$target; then
1385     case $host in
1386       # mingw32 doesn't have __cxa_atexit but uses atexit registration
1387       # keyed to flag_use_cxa_atexit
1388       *-*-mingw32*)
1389         use_cxa_atexit=yes
1390         ;;
1391       *)
1392         AC_CHECK_FUNC(__cxa_atexit,[use_cxa_atexit=yes],
1393           [echo "__cxa_atexit can't be enabled on this target"])
1394         ;;
1395     esac
1396   else
1397     # We can't check for __cxa_atexit when building a cross, so assume
1398     # it is available
1399     use_cxa_atexit=yes
1400   fi
1401   if test x$use_cxa_atexit = xyes; then
1402     AC_DEFINE(DEFAULT_USE_CXA_ATEXIT, 2,
1403       [Define if you want to use __cxa_atexit, rather than atexit, to
1404       register C++ destructors for local statics and global objects.
1405       This is essential for fully standards-compliant handling of
1406       destructors, but requires __cxa_atexit in libc.])
1407   fi
1408 fi
1409
1410 use_getipinfo=yes
1411 if test x$with_system_libunwind = xyes; then
1412    if test x$host = x$target; then
1413      AC_SEARCH_LIBS(_Unwind_GetIPInfo, unwind,, [use_getipinfo=no])
1414    fi
1415 fi
1416 GCC_TARGET_TEMPLATE(HAVE_GETIPINFO)
1417 if test x$use_getipinfo = xyes; then
1418    AC_DEFINE(HAVE_GETIPINFO, 1,
1419         [Define to 1 if system unwind library has _Unwind_GetIPInfo.])
1420 else
1421    echo "The system unwind library does not support _Unwind_GetIPInfo."
1422 fi
1423
1424 # Look for a file containing extra machine modes.
1425 if test -n "$extra_modes" && test -f $srcdir/config/$extra_modes; then
1426   extra_modes_file='$(srcdir)'/config/${extra_modes}
1427   AC_SUBST(extra_modes_file)
1428   AC_DEFINE_UNQUOTED(EXTRA_MODES_FILE, "config/$extra_modes",
1429   [Define to the name of a file containing a list of extra machine modes
1430    for this architecture.])
1431 fi
1432
1433 # Convert extra_options into a form suitable for Makefile use.
1434 extra_opt_files=
1435 for f in $extra_options; do
1436   extra_opt_files="$extra_opt_files \$(srcdir)/config/$f"
1437 done
1438 AC_SUBST(extra_opt_files)
1439
1440 # auto-host.h is the file containing items generated by autoconf and is
1441 # the first file included by config.h.
1442 # If host=build, it is correct to have bconfig include auto-host.h
1443 # as well.  If host!=build, we are in error and need to do more
1444 # work to find out the build config parameters.
1445 if test x$host = x$build
1446 then
1447         build_auto=auto-host.h
1448 else
1449         # We create a subdir, then run autoconf in the subdir.
1450         # To prevent recursion we set host and build for the new
1451         # invocation of configure to the build for this invocation
1452         # of configure.
1453         tempdir=build.$$
1454         rm -rf $tempdir
1455         mkdir $tempdir
1456         cd $tempdir
1457         case ${srcdir} in
1458         /* | [A-Za-z]:[\\/]* ) realsrcdir=${srcdir};;
1459         *) realsrcdir=../${srcdir};;
1460         esac
1461         saved_CFLAGS="${CFLAGS}"
1462         CC="${CC_FOR_BUILD}" CFLAGS="${CFLAGS_FOR_BUILD}" \
1463         ${realsrcdir}/configure \
1464                 --enable-languages=${enable_languages-all} \
1465                 --target=$target_alias --host=$build_alias --build=$build_alias
1466         CFLAGS="${saved_CFLAGS}"
1467
1468         # We just finished tests for the build machine, so rename
1469         # the file auto-build.h in the gcc directory.
1470         mv auto-host.h ../auto-build.h
1471         cd ..
1472         rm -rf $tempdir
1473         build_auto=auto-build.h
1474 fi
1475 AC_SUBST(build_subdir)
1476
1477 tm_file="${tm_file} defaults.h"
1478 tm_p_file="${tm_p_file} tm-preds.h"
1479 host_xm_file="auto-host.h ansidecl.h ${host_xm_file}"
1480 build_xm_file="${build_auto} ansidecl.h ${build_xm_file}"
1481 # We don't want ansidecl.h in target files, write code there in ISO/GNU C.
1482 # put this back in temporarily.
1483 xm_file="auto-host.h ansidecl.h ${xm_file}"
1484
1485 # --------
1486 # UNSORTED
1487 # --------
1488
1489 changequote(,)dnl
1490 # Compile in configure arguments.
1491 if test -f configargs.h ; then
1492         # Being re-configured.
1493         gcc_config_arguments=`grep configuration_arguments configargs.h | sed -e 's/.*"\([^"]*\)".*/\1/'`
1494         gcc_config_arguments="$gcc_config_arguments : (reconfigured) $TOPLEVEL_CONFIGURE_ARGUMENTS"
1495 else
1496         gcc_config_arguments="$TOPLEVEL_CONFIGURE_ARGUMENTS"
1497 fi
1498
1499 # Double all backslashes and backslash all quotes to turn
1500 # gcc_config_arguments into a C string.
1501 sed -e 's/\\/\\\\/g; s/"/\\"/g' <<EOF >conftest.out
1502 $gcc_config_arguments
1503 EOF
1504 gcc_config_arguments_str=`cat conftest.out`
1505 rm -f conftest.out
1506
1507 cat > configargs.h <<EOF
1508 /* Generated automatically. */
1509 static const char configuration_arguments[] = "$gcc_config_arguments_str";
1510 static const char thread_model[] = "$thread_file";
1511
1512 static const struct {
1513   const char *name, *value;
1514 } configure_default_options[] = $configure_default_options;
1515 EOF
1516 changequote([,])dnl
1517
1518 # Internationalization
1519 ZW_GNU_GETTEXT_SISTER_DIR
1520
1521 # If LIBINTL contains LIBICONV, then clear LIBICONV so we don't get
1522 # -liconv on the link line twice.
1523 case "$LIBINTL" in *$LIBICONV*)
1524         LIBICONV= ;;
1525 esac
1526
1527 AC_ARG_ENABLE(secureplt,
1528 [  --enable-secureplt      enable -msecure-plt by default for PowerPC],
1529 [], [])
1530
1531 # Windows32 Registry support for specifying GCC installation paths.
1532 AC_ARG_ENABLE(win32-registry,
1533 [  --disable-win32-registry
1534                           disable lookup of installation paths in the
1535                           Registry on Windows hosts
1536   --enable-win32-registry enable registry lookup (default)
1537   --enable-win32-registry=KEY
1538                           use KEY instead of GCC version as the last portion
1539                           of the registry key],,)
1540
1541 case $host_os in
1542   win32 | pe | cygwin* | mingw32* | uwin*)
1543     if test "x$enable_win32_registry" != xno; then
1544       AC_SEARCH_LIBS(RegOpenKeyExA, advapi32,, [enable_win32_registry=no])
1545     fi
1546
1547     if test "x$enable_win32_registry" != xno; then
1548       AC_DEFINE(ENABLE_WIN32_REGISTRY, 1,
1549   [Define to 1 if installation paths should be looked up in the Windows
1550    Registry. Ignored on non-Windows hosts.])
1551
1552       if test "x$enable_win32_registry" != xyes \
1553          && test "x$enable_win32_registry" != x; then
1554         AC_DEFINE_UNQUOTED(WIN32_REGISTRY_KEY, "$enable_win32_registry",
1555   [Define to be the last component of the Windows registry key under which
1556    to look for installation paths.  The full key used will be
1557    HKEY_LOCAL_MACHINE/SOFTWARE/Free Software Foundation/{WIN32_REGISTRY_KEY}.
1558    The default is the GCC version number.])
1559       fi
1560     fi
1561   ;;
1562 esac
1563
1564 # Get an absolute path to the GCC top-level source directory
1565 holddir=`${PWDCMD-pwd}`
1566 cd $srcdir
1567 topdir=`${PWDCMD-pwd}`
1568 cd $holddir
1569
1570 # Conditionalize the makefile for this host machine.
1571 xmake_file=
1572 for f in ${host_xmake_file}
1573 do
1574         if test -f ${srcdir}/config/$f
1575         then
1576                 xmake_file="${xmake_file} \$(srcdir)/config/$f"
1577         fi
1578 done
1579
1580 # Conditionalize the makefile for this target machine.
1581 tmake_file_=
1582 for f in ${tmake_file}
1583 do
1584         if test -f ${srcdir}/config/$f
1585         then
1586                 tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
1587         fi
1588 done
1589 tmake_file="${tmake_file_}"
1590
1591 # This is a terrible hack which will go away some day.
1592 host_cc_for_libada=${CC}
1593 AC_SUBST(host_cc_for_libada)
1594
1595 out_object_file=`basename $out_file .c`.o
1596
1597 tm_file_list="options.h"
1598 tm_include_list="options.h"
1599 for f in $tm_file; do
1600   case $f in
1601     ./* )
1602        f=`echo $f | sed 's/^..//'`
1603        tm_file_list="${tm_file_list} $f"
1604        tm_include_list="${tm_include_list} $f"
1605        ;;
1606     defaults.h )
1607        tm_file_list="${tm_file_list} \$(srcdir)/$f"
1608        tm_include_list="${tm_include_list} $f"
1609        ;;
1610     * )
1611        tm_file_list="${tm_file_list} \$(srcdir)/config/$f"
1612        tm_include_list="${tm_include_list} config/$f"
1613        ;;
1614   esac
1615 done
1616
1617 tm_p_file_list=
1618 tm_p_include_list=
1619 for f in $tm_p_file; do
1620   case $f in
1621     tm-preds.h )
1622        tm_p_file_list="${tm_p_file_list} $f"
1623        tm_p_include_list="${tm_p_include_list} $f"
1624        ;;
1625     * )
1626        tm_p_file_list="${tm_p_file_list} \$(srcdir)/config/$f"
1627        tm_p_include_list="${tm_p_include_list} config/$f"
1628   esac
1629 done
1630
1631 xm_file_list=
1632 xm_include_list=
1633 for f in $xm_file; do
1634   case $f in
1635     ansidecl.h )
1636        xm_file_list="${xm_file_list} \$(srcdir)/../include/$f"
1637        xm_include_list="${xm_include_list} $f"
1638        ;;
1639     auto-host.h )
1640        xm_file_list="${xm_file_list} $f"
1641        xm_include_list="${xm_include_list} $f"
1642        ;;
1643     * )
1644        xm_file_list="${xm_file_list} \$(srcdir)/config/$f"
1645        xm_include_list="${xm_include_list} config/$f"
1646        ;;
1647   esac
1648 done
1649
1650 host_xm_file_list=
1651 host_xm_include_list=
1652 for f in $host_xm_file; do
1653   case $f in
1654     ansidecl.h )
1655        host_xm_file_list="${host_xm_file_list} \$(srcdir)/../include/$f"
1656        host_xm_include_list="${host_xm_include_list} $f"
1657        ;;
1658     auto-host.h )
1659        host_xm_file_list="${host_xm_file_list} $f"
1660        host_xm_include_list="${host_xm_include_list} $f"
1661        ;;
1662     * )
1663        host_xm_file_list="${host_xm_file_list} \$(srcdir)/config/$f"
1664        host_xm_include_list="${host_xm_include_list} config/$f"
1665        ;;
1666   esac
1667 done
1668
1669 build_xm_file_list=
1670 for f in $build_xm_file; do
1671   case $f in
1672     ansidecl.h )
1673        build_xm_file_list="${build_xm_file_list} \$(srcdir)/../include/$f"
1674        build_xm_include_list="${build_xm_include_list} $f"
1675        ;;
1676     auto-build.h | auto-host.h )
1677        build_xm_file_list="${build_xm_file_list} $f"
1678        build_xm_include_list="${build_xm_include_list} $f"
1679        ;;
1680     * )
1681        build_xm_file_list="${build_xm_file_list} \$(srcdir)/config/$f"
1682        build_xm_include_list="${build_xm_include_list} config/$f"
1683        ;;
1684   esac
1685 done
1686
1687 # Define macro CROSS_DIRECTORY_STRUCTURE in compilation if this is a
1688 # cross-compiler which does not use the native headers and libraries.
1689 # Also use all.cross instead of all.internal and adjust SYSTEM_HEADER_DIR.
1690 CROSS=                                          AC_SUBST(CROSS)
1691 ALL=all.internal                                AC_SUBST(ALL)
1692 SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)' AC_SUBST(SYSTEM_HEADER_DIR)
1693
1694 if test "x$with_build_sysroot" != x; then
1695   build_system_header_dir=$with_build_sysroot'$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
1696 else
1697   # This value is used, even on a native system, because
1698   # CROSS_SYSTEM_HEADER_DIR is just
1699   # $(TARGET_SYSTEM_ROOT)$(NATIVE_SYSTEM_HEADER_DIR).
1700   build_system_header_dir='$(CROSS_SYSTEM_HEADER_DIR)'
1701 fi
1702
1703 if test x$host != x$target
1704 then
1705         CROSS="-DCROSS_DIRECTORY_STRUCTURE"
1706         ALL=all.cross
1707         SYSTEM_HEADER_DIR=$build_system_header_dir
1708         case "$host","$target" in
1709         # Darwin crosses can use the host system's libraries and headers,
1710         # because of the fat library support.  Of course, it must be the
1711         # same version of Darwin on both sides.  Allow the user to
1712         # just say --target=foo-darwin without a version number to mean
1713         # "the version on this system".
1714             *-*-darwin*,*-*-darwin*)
1715                 hostos=`echo $host | sed 's/.*-darwin/darwin/'`
1716                 targetos=`echo $target | sed 's/.*-darwin/darwin/'`
1717                 if test $hostos = $targetos -o $targetos = darwin ; then
1718                     CROSS=
1719                     SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)'
1720                     with_headers=yes
1721                 fi
1722                 ;;
1723
1724             i?86-*-*,x86_64-*-* \
1725             | powerpc*-*-*,powerpc64*-*-*)
1726                 CROSS="$CROSS -DNATIVE_CROSS" ;;
1727         esac
1728 elif test "x$TARGET_SYSTEM_ROOT" != x; then
1729         SYSTEM_HEADER_DIR=$build_system_header_dir
1730 fi
1731
1732 # If this is a cross-compiler that does not
1733 # have its own set of headers then define
1734 # inhibit_libc
1735
1736 # If this is using newlib, without having the headers available now,
1737 # then define inhibit_libc in LIBGCC2_CFLAGS.
1738 # This prevents libgcc2 from containing any code which requires libc
1739 # support.
1740 : ${inhibit_libc=false}
1741 if { { test x$host != x$target && test "x$with_sysroot" = x ; } ||
1742        test x$with_newlib = xyes ; } &&
1743      { test "x$with_headers" = x || test "x$with_headers" = xno ; } ; then
1744        inhibit_libc=true
1745 fi
1746 AC_SUBST(inhibit_libc)
1747
1748 # When building gcc with a cross-compiler, we need to adjust things so
1749 # that the generator programs are still built with the native compiler.
1750 # Also, we cannot run fixincludes or fix-header.
1751
1752 # These are the normal (build=host) settings:
1753 CC_FOR_BUILD='$(CC)'            AC_SUBST(CC_FOR_BUILD)
1754 BUILD_CFLAGS='$(ALL_CFLAGS)'    AC_SUBST(BUILD_CFLAGS)
1755 STMP_FIXINC=stmp-fixinc         AC_SUBST(STMP_FIXINC)
1756
1757 # Possibly disable fixproto, on a per-target basis.
1758 case ${use_fixproto} in
1759   no)
1760     STMP_FIXPROTO=
1761     ;;
1762   yes)
1763     STMP_FIXPROTO=stmp-fixproto
1764     ;;
1765 esac
1766 AC_SUBST(STMP_FIXPROTO)
1767
1768 # And these apply if build != host, or we are generating coverage data
1769 if test x$build != x$host || test "x$coverage_flags" != x
1770 then
1771     BUILD_CFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS_FOR_BUILD)'
1772
1773     if test "x$TARGET_SYSTEM_ROOT" = x; then
1774         if test "x$STMP_FIXPROTO" != x; then
1775           STMP_FIXPROTO=stmp-install-fixproto
1776         fi
1777     fi
1778 fi
1779
1780 # Expand extra_headers to include complete path.
1781 # This substitutes for lots of t-* files.
1782 extra_headers_list=
1783 # Prepend $(srcdir)/config/${cpu_type}/ to every entry in extra_headers.
1784 for file in ${extra_headers} ; do
1785   extra_headers_list="${extra_headers_list} \$(srcdir)/config/${cpu_type}/${file}"
1786 done
1787
1788 # If use_gcc_tgmath is set, append ginclude/tgmath.h.
1789 if test x"$use_gcc_tgmath" = xyes
1790 then extra_headers_list="${extra_headers_list} \$(srcdir)/ginclude/tgmath.h"
1791 fi
1792
1793 # Define collect2 in Makefile.
1794 case $host_can_use_collect2 in
1795   no) collect2= ;;
1796   *) collect2='collect2$(exeext)' ;;
1797 esac
1798 AC_SUBST([collect2])
1799
1800 # Add a definition of USE_COLLECT2 if system wants one.
1801 case $use_collect2 in
1802   no) use_collect2= ;;
1803   "") ;;
1804   *)
1805     host_xm_defines="${host_xm_defines} USE_COLLECT2"
1806     xm_defines="${xm_defines} USE_COLLECT2"
1807     case $host_can_use_collect2 in
1808       no)
1809         AC_MSG_ERROR([collect2 is required but cannot be built on this system])
1810         ;;
1811     esac
1812     ;;
1813 esac
1814
1815 # ---------------------------
1816 # Assembler & linker features
1817 # ---------------------------
1818
1819 # During stage 2, ld is actually gcc/collect-ld, which is a small script to
1820 # discern between when to use prev-ld/ld-new and when to use ld/ld-new.
1821 # However when ld-new is first executed from the build tree, libtool will
1822 # relink it as .libs/lt-ld-new, so that it can give it an RPATH that refers
1823 # to the build tree.  While doing this we need to use the previous-stage
1824 # linker, or we have an infinite loop.  The presence of a shell script as
1825 # ld/ld-new, and the fact that the script *uses ld itself*, is what confuses
1826 # the gcc/collect-ld script.  So we need to know how libtool works, or
1827 # exec-tool will fail.
1828
1829 m4_defun([_LT_CONFIG_COMMANDS], [])
1830 AC_PROG_LIBTOOL
1831 AC_SUBST(objdir)
1832 AC_SUBST(enable_fast_install)
1833
1834 # Identify the assembler which will work hand-in-glove with the newly
1835 # built GCC, so that we can examine its features.  This is the assembler
1836 # which will be driven by the driver program.
1837 #
1838 # If build != host, and we aren't building gas in-tree, we identify a
1839 # build->target assembler and hope that it will have the same features
1840 # as the host->target assembler we'll be using.
1841 gcc_cv_gas_major_version=
1842 gcc_cv_gas_minor_version=
1843 gcc_cv_as_gas_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gas
1844
1845 m4_pattern_allow([AS_FOR_TARGET])dnl
1846 AS_VAR_SET_IF(gcc_cv_as,, [
1847 if test -x "$DEFAULT_ASSEMBLER"; then
1848         gcc_cv_as="$DEFAULT_ASSEMBLER"
1849 elif test -f $gcc_cv_as_gas_srcdir/configure.in \
1850      && test -f ../gas/Makefile \
1851      && test x$build = x$host; then
1852         gcc_cv_as=../gas/as-new$build_exeext
1853 elif test -x as$build_exeext; then
1854         # Build using assembler in the current directory.
1855         gcc_cv_as=./as$build_exeext
1856 elif test -x $AS_FOR_TARGET; then
1857         gcc_cv_as="$AS_FOR_TARGET"
1858 else
1859         AC_PATH_PROG(gcc_cv_as, $AS_FOR_TARGET)
1860 fi])
1861
1862 ORIGINAL_AS_FOR_TARGET=$gcc_cv_as
1863 AC_SUBST(ORIGINAL_AS_FOR_TARGET)
1864 case "$ORIGINAL_AS_FOR_TARGET" in
1865   ./as | ./as$build_exeext) ;;
1866   *) AC_CONFIG_FILES(as:exec-tool.in, [chmod +x as]) ;;
1867 esac
1868
1869 AC_MSG_CHECKING(what assembler to use)
1870 if test "$gcc_cv_as" = ../gas/as-new$build_exeext; then
1871   # Single tree build which includes gas.  We want to prefer it
1872   # over whatever linker top-level may have detected, since
1873   # we'll use what we're building after installation anyway.
1874   AC_MSG_RESULT(newly built gas)
1875   in_tree_gas=yes
1876   _gcc_COMPUTE_GAS_VERSION
1877   in_tree_gas_is_elf=no
1878   if grep 'obj_format = elf' ../gas/Makefile > /dev/null \
1879      || (grep 'obj_format = multi' ../gas/Makefile \
1880          && grep 'extra_objects =.* obj-elf' ../gas/Makefile) > /dev/null
1881   then
1882     in_tree_gas_is_elf=yes
1883   fi
1884 else
1885   AC_MSG_RESULT($gcc_cv_as)
1886   in_tree_gas=no
1887 fi
1888
1889 # Identify the linker which will work hand-in-glove with the newly
1890 # built GCC, so that we can examine its features.  This is the linker
1891 # which will be driven by the driver program.
1892 #
1893 # If build != host, and we aren't building gas in-tree, we identify a
1894 # build->target linker and hope that it will have the same features
1895 # as the host->target linker we'll be using.
1896 gcc_cv_gld_major_version=
1897 gcc_cv_gld_minor_version=
1898 gcc_cv_ld_gld_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/ld
1899 gcc_cv_ld_bfd_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/bfd
1900
1901 AS_VAR_SET_IF(gcc_cv_ld,, [
1902 if test -x "$DEFAULT_LINKER"; then
1903         gcc_cv_ld="$DEFAULT_LINKER"
1904 elif test -f $gcc_cv_ld_gld_srcdir/configure.in \
1905      && test -f ../ld/Makefile \
1906      && test x$build = x$host; then
1907         gcc_cv_ld=../ld/ld-new$build_exeext
1908 elif test -x collect-ld$build_exeext; then
1909         # Build using linker in the current directory.
1910         gcc_cv_ld=./collect-ld$build_exeext
1911 elif test -x $LD_FOR_TARGET; then
1912         gcc_cv_ld="$LD_FOR_TARGET"
1913 else
1914         AC_PATH_PROG(gcc_cv_ld, $LD_FOR_TARGET)
1915 fi])
1916
1917 ORIGINAL_LD_FOR_TARGET=$gcc_cv_ld
1918 AC_SUBST(ORIGINAL_LD_FOR_TARGET)
1919 case "$ORIGINAL_LD_FOR_TARGET" in
1920   ./collect-ld | ./collect-ld$build_exeext) ;;
1921   *) AC_CONFIG_FILES(collect-ld:exec-tool.in, [chmod +x collect-ld]) ;;
1922 esac
1923
1924 AC_MSG_CHECKING(what linker to use)
1925 if test "$gcc_cv_ld" = ../ld/ld-new$build_exeext; then
1926         # Single tree build which includes ld.  We want to prefer it
1927         # over whatever linker top-level may have detected, since
1928         # we'll use what we're building after installation anyway.
1929         AC_MSG_RESULT(newly built ld)
1930         in_tree_ld=yes
1931         in_tree_ld_is_elf=no
1932         if (grep 'EMUL = .*elf' ../ld/Makefile \
1933             || grep 'EMUL = .*linux' ../ld/Makefile \
1934             || grep 'EMUL = .*lynx' ../ld/Makefile) > /dev/null; then
1935           in_tree_ld_is_elf=yes
1936         fi
1937         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
1938         do
1939 changequote(,)dnl
1940                 gcc_cv_gld_version=`sed -n -e 's/^[     ]*\(VERSION=[0-9]*\.[0-9]*.*\)/\1/p' < $f`
1941                 if test x$gcc_cv_gld_version != x; then
1942                         break
1943                 fi
1944         done
1945         gcc_cv_gld_major_version=`expr "$gcc_cv_gld_version" : "VERSION=\([0-9]*\)"`
1946         gcc_cv_gld_minor_version=`expr "$gcc_cv_gld_version" : "VERSION=[0-9]*\.\([0-9]*\)"`
1947 changequote([,])dnl
1948 else
1949         AC_MSG_RESULT($gcc_cv_ld)
1950         in_tree_ld=no
1951 fi
1952
1953 # Figure out what nm we will be using.
1954 gcc_cv_binutils_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/binutils
1955 AS_VAR_SET_IF(gcc_cv_nm,, [
1956 if test -f $gcc_cv_binutils_srcdir/configure.in \
1957      && test -f ../binutils/Makefile \
1958      && test x$build = x$host; then
1959         gcc_cv_nm=../binutils/nm-new$build_exeext
1960 elif test -x nm$build_exeext; then
1961         gcc_cv_nm=./nm$build_exeext
1962 elif test -x $NM_FOR_TARGET; then
1963         gcc_cv_nm="$NM_FOR_TARGET"
1964 else
1965         AC_PATH_PROG(gcc_cv_nm, $NM_FOR_TARGET)
1966 fi])
1967
1968 AC_MSG_CHECKING(what nm to use)
1969 if test "$gcc_cv_nm" = ../binutils/nm-new$build_exeext; then
1970         # Single tree build which includes binutils.
1971         AC_MSG_RESULT(newly built nm)
1972         in_tree_nm=yes
1973 else
1974         AC_MSG_RESULT($gcc_cv_nm)
1975         in_tree_nm=no
1976 fi
1977
1978 ORIGINAL_NM_FOR_TARGET=$gcc_cv_nm
1979 AC_SUBST(ORIGINAL_NM_FOR_TARGET)
1980 case "$ORIGINAL_NM_FOR_TARGET" in
1981   ./nm | ./nm$build_exeext) ;;
1982   *) AC_CONFIG_FILES(nm:exec-tool.in, [chmod +x nm]) ;;
1983 esac
1984
1985
1986 # Figure out what objdump we will be using.
1987 AS_VAR_SET_IF(gcc_cv_objdump,, [
1988 if test -f $gcc_cv_binutils_srcdir/configure.in \
1989      && test -f ../binutils/Makefile \
1990      && test x$build = x$host; then
1991         # Single tree build which includes binutils.
1992         gcc_cv_objdump=../binutils/objdump$build_exeext
1993 elif test -x objdump$build_exeext; then
1994         gcc_cv_objdump=./objdump$build_exeext
1995 elif test -x $OBJDUMP_FOR_TARGET; then
1996         gcc_cv_objdump="$OBJDUMP_FOR_TARGET"
1997 else
1998         AC_PATH_PROG(gcc_cv_objdump, $OBJDUMP_FOR_TARGET)
1999 fi])
2000
2001 AC_MSG_CHECKING(what objdump to use)
2002 if test "$gcc_cv_objdump" = ../binutils/objdump$build_exeext; then
2003         # Single tree build which includes binutils.
2004         AC_MSG_RESULT(newly built objdump)
2005 elif test x$gcc_cv_objdump = x; then
2006         AC_MSG_RESULT(not found)
2007 else
2008         AC_MSG_RESULT($gcc_cv_objdump)
2009 fi
2010
2011 # Figure out what assembler alignment features are present.
2012 gcc_GAS_CHECK_FEATURE([.balign and .p2align], gcc_cv_as_balign_and_p2align,
2013  [2,6,0],,
2014 [.balign 4
2015 .p2align 2],,
2016 [AC_DEFINE(HAVE_GAS_BALIGN_AND_P2ALIGN, 1,
2017   [Define if your assembler supports .balign and .p2align.])])
2018
2019 gcc_GAS_CHECK_FEATURE([.p2align with maximum skip], gcc_cv_as_max_skip_p2align,
2020  [2,8,0],,
2021  [.p2align 4,,7],,
2022 [AC_DEFINE(HAVE_GAS_MAX_SKIP_P2ALIGN, 1,
2023   [Define if your assembler supports specifying the maximum number
2024    of bytes to skip when using the GAS .p2align command.])])
2025
2026 gcc_GAS_CHECK_FEATURE([.literal16], gcc_cv_as_literal16,
2027  [2,8,0],,
2028  [.literal16],,
2029 [AC_DEFINE(HAVE_GAS_LITERAL16, 1,
2030   [Define if your assembler supports .literal16.])])
2031
2032 gcc_GAS_CHECK_FEATURE([working .subsection -1], gcc_cv_as_subsection_m1,
2033  [elf,2,9,0],,
2034  [conftest_label1: .word 0
2035 .subsection -1
2036 conftest_label2: .word 0
2037 .previous],
2038  [if test x$gcc_cv_nm != x; then
2039     $gcc_cv_nm conftest.o | grep conftest_label1 > conftest.nm1
2040     $gcc_cv_nm conftest.o | grep conftest_label2 | sed -e 's/label2/label1/' > conftest.nm2
2041     if cmp conftest.nm1 conftest.nm2 > /dev/null 2>&1
2042     then :
2043     else gcc_cv_as_subsection_m1=yes
2044     fi
2045     rm -f conftest.nm1 conftest.nm2
2046   fi],
2047  [AC_DEFINE(HAVE_GAS_SUBSECTION_ORDERING, 1,
2048   [Define if your assembler supports .subsection and .subsection -1 starts
2049    emitting at the beginning of your section.])])
2050
2051 gcc_GAS_CHECK_FEATURE([.weak], gcc_cv_as_weak,
2052  [2,2,0],,
2053  [      .weak foobar],,
2054 [AC_DEFINE(HAVE_GAS_WEAK, 1, [Define if your assembler supports .weak.])])
2055
2056 gcc_GAS_CHECK_FEATURE([.weakref], gcc_cv_as_weakref,
2057  [2,17,0],,
2058  [      .weakref foobar, barfnot],,
2059 [AC_DEFINE(HAVE_GAS_WEAKREF, 1, [Define if your assembler supports .weakref.])])
2060
2061 gcc_GAS_CHECK_FEATURE([.nsubspa comdat], gcc_cv_as_nsubspa_comdat,
2062  [2,15,91],,
2063  [      .SPACE $TEXT$
2064         .NSUBSPA $CODE$,COMDAT],,
2065 [AC_DEFINE(HAVE_GAS_NSUBSPA_COMDAT, 1, [Define if your assembler supports .nsubspa comdat option.])])
2066
2067 # .hidden needs to be supported in both the assembler and the linker,
2068 # because GNU LD versions before 2.12.1 have buggy support for STV_HIDDEN.
2069 # This is irritatingly difficult to feature test for; we have to check the
2070 # date string after the version number.  If we've got an in-tree
2071 # ld, we don't know its patchlevel version, so we set the baseline at 2.13
2072 # to be safe.
2073 # The gcc_GAS_CHECK_FEATURE call just sets a cache variable.
2074 gcc_GAS_CHECK_FEATURE([.hidden], gcc_cv_as_hidden,
2075  [elf,2,13,0],,
2076 [       .hidden foobar
2077 foobar:])
2078
2079 AC_CACHE_CHECK(linker for .hidden support, gcc_cv_ld_hidden,
2080 [if test $in_tree_ld = yes ; then
2081   gcc_cv_ld_hidden=no
2082   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 13 -o "$gcc_cv_gld_major_version" -gt 2 \
2083      && test $in_tree_ld_is_elf = yes; then
2084      gcc_cv_ld_hidden=yes
2085   fi
2086 else
2087   gcc_cv_ld_hidden=yes
2088   ld_ver=`$gcc_cv_ld --version 2>/dev/null | sed 1q`
2089   if echo "$ld_ver" | grep GNU > /dev/null; then
2090 changequote(,)dnl
2091     ld_vers=`echo $ld_ver | sed -n \
2092         -e 's,^.*[       ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2093     ld_date=`echo $ld_ver | sed -n 's,^.*\([2-9][0-9][0-9][0-9]\)[-]*\([01][0-9]\)[-]*\([0-3][0-9]\).*$,\1\2\3,p'`
2094     ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2095     ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2096     ld_vers_patch=`expr "$ld_vers" : '[0-9]*\.[0-9]*\.\([0-9]*\)'`
2097     if test 0"$ld_date" -lt 20020404; then
2098       if test -n "$ld_date"; then
2099         # If there was date string, but was earlier than 2002-04-04, fail
2100         gcc_cv_ld_hidden=no
2101       elif test -z "$ld_vers"; then
2102         # If there was no date string nor ld version number, something is wrong
2103         gcc_cv_ld_hidden=no
2104       else
2105         test -z "$ld_vers_patch" && ld_vers_patch=0
2106         if test "$ld_vers_major" -lt 2; then
2107           gcc_cv_ld_hidden=no
2108         elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 12; then
2109           gcc_cv_ld_hidden="no"
2110         elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 12 -a "$ld_vers_patch" -eq 0; then
2111           gcc_cv_ld_hidden=no
2112         fi
2113       fi
2114 changequote([,])dnl
2115     fi
2116   else
2117     case "${target}" in
2118       hppa64*-*-hpux* | ia64*-*-hpux*)
2119         gcc_cv_ld_hidden=yes
2120         ;;
2121       *)
2122         gcc_cv_ld_hidden=no
2123         ;;
2124     esac
2125   fi
2126 fi])
2127 libgcc_visibility=no
2128 AC_SUBST(libgcc_visibility)
2129 GCC_TARGET_TEMPLATE([HAVE_GAS_HIDDEN])
2130 if test $gcc_cv_as_hidden = yes && test $gcc_cv_ld_hidden = yes; then
2131   libgcc_visibility=yes
2132   AC_DEFINE(HAVE_GAS_HIDDEN, 1,
2133   [Define if your assembler and linker support .hidden.])
2134 fi
2135
2136 # Check if we have .[us]leb128, and support symbol arithmetic with it.
2137 gcc_GAS_CHECK_FEATURE([.sleb128 and .uleb128], gcc_cv_as_leb128,
2138   [elf,2,11,0],,
2139 [       .data
2140         .uleb128 L2 - L1
2141 L1:
2142         .uleb128 1280
2143         .sleb128 -1010
2144 L2:],
2145  [# GAS versions before 2.11 do not support uleb128,
2146   # despite appearing to.
2147   # ??? There exists an elf-specific test that will crash
2148   # the assembler.  Perhaps it's better to figure out whether
2149   # arbitrary sections are supported and try the test.
2150   as_ver=`$gcc_cv_as --version 2>/dev/null | sed 1q`
2151   if echo "$as_ver" | grep GNU > /dev/null; then
2152 changequote(,)dnl
2153     as_vers=`echo $as_ver | sed -n \
2154         -e 's,^.*[       ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2155     as_major=`expr "$as_vers" : '\([0-9]*\)'`
2156     as_minor=`expr "$as_vers" : '[0-9]*\.\([0-9]*\)'`
2157 changequote([,])dnl
2158     if test $as_major -eq 2 && test $as_minor -lt 11
2159     then :
2160     else gcc_cv_as_leb128=yes
2161     fi
2162   fi],
2163   [AC_DEFINE(HAVE_AS_LEB128, 1,
2164     [Define if your assembler supports .sleb128 and .uleb128.])])
2165
2166 # GAS versions up to and including 2.11.0 may mis-optimize
2167 # .eh_frame data.
2168 gcc_GAS_CHECK_FEATURE(eh_frame optimization, gcc_cv_as_eh_frame,
2169   [elf,2,12,0],,
2170 [       .text
2171 .LFB1:
2172         .4byte  0
2173 .L1:
2174         .4byte  0
2175 .LFE1:
2176         .section        .eh_frame,"aw",@progbits
2177 __FRAME_BEGIN__:
2178         .4byte  .LECIE1-.LSCIE1
2179 .LSCIE1:
2180         .4byte  0x0
2181         .byte   0x1
2182         .ascii "z\0"
2183         .byte   0x1
2184         .byte   0x78
2185         .byte   0x1a
2186         .byte   0x0
2187         .byte   0x4
2188         .4byte  1
2189         .p2align 1
2190 .LECIE1:
2191 .LSFDE1:
2192         .4byte  .LEFDE1-.LASFDE1
2193 .LASFDE1:
2194         .4byte  .LASFDE1-__FRAME_BEGIN__
2195         .4byte  .LFB1
2196         .4byte  .LFE1-.LFB1
2197         .byte   0x4
2198         .4byte  .LFE1-.LFB1
2199         .byte   0x4
2200         .4byte  .L1-.LFB1
2201 .LEFDE1:],
2202 [  dnl # For autoconf 2.5x, must protect trailing spaces with @&t@.
2203 cat > conftest.lit <<EOF
2204  0000 10000000 00000000 017a0001 781a0004  .........z..x...
2205  0010 01000000 12000000 18000000 00000000  ................
2206  0020 08000000 04080000 0044               .........D      @&t@
2207 EOF
2208 cat > conftest.big <<EOF
2209  0000 00000010 00000000 017a0001 781a0004  .........z..x...
2210  0010 00000001 00000012 00000018 00000000  ................
2211  0020 00000008 04000000 0844               .........D      @&t@
2212 EOF
2213   # If the assembler didn't choke, and we can objdump,
2214   # and we got the correct data, then succeed.
2215   # The text in the here-document typically retains its unix-style line
2216   # endings, while the output of objdump will use host line endings.
2217   # Therefore, use diff -b for the comparisons.
2218   if test x$gcc_cv_objdump != x \
2219   && $gcc_cv_objdump -s -j .eh_frame conftest.o 2>/dev/null \
2220      | tail -3 > conftest.got \
2221   && { diff -b conftest.lit conftest.got > /dev/null 2>&1 \
2222     || diff -b conftest.big conftest.got > /dev/null 2>&1; }
2223   then
2224     gcc_cv_as_eh_frame=yes
2225   elif AC_TRY_COMMAND($gcc_cv_as -o conftest.o --traditional-format /dev/null); then
2226     gcc_cv_as_eh_frame=buggy
2227   else
2228     # Uh oh, what do we do now?
2229     gcc_cv_as_eh_frame=no
2230   fi])
2231
2232 if test $gcc_cv_as_eh_frame = buggy; then
2233   AC_DEFINE(USE_AS_TRADITIONAL_FORMAT, 1,
2234   [Define if your assembler mis-optimizes .eh_frame data.])
2235 fi
2236
2237 gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2238  [elf,2,12,0], [--fatal-warnings],
2239  [.section .rodata.str, "aMS", @progbits, 1])
2240 if test $gcc_cv_as_shf_merge = no; then
2241   gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2242     [elf,2,12,0], [--fatal-warnings],
2243     [.section .rodata.str, "aMS", %progbits, 1])
2244 fi
2245 AC_DEFINE_UNQUOTED(HAVE_GAS_SHF_MERGE,
2246   [`if test $gcc_cv_as_shf_merge = yes; then echo 1; else echo 0; fi`],
2247 [Define 0/1 if your assembler supports marking sections with SHF_MERGE flag.])
2248
2249 gcc_GAS_CHECK_FEATURE(COMDAT group support, gcc_cv_as_comdat_group,
2250  [elf,2,16,0], [--fatal-warnings],
2251  [.section .text,"axG",@progbits,.foo,comdat])
2252 if test $gcc_cv_as_comdat_group = yes; then
2253   gcc_cv_as_comdat_group_percent=no
2254 else
2255  gcc_GAS_CHECK_FEATURE(COMDAT group support, gcc_cv_as_comdat_group_percent,
2256    [elf,2,16,0], [--fatal-warnings],
2257    [.section .text,"axG",%progbits,.foo,comdat])
2258 fi
2259 if test $in_tree_ld != yes && test x"$ld_vers" != x; then
2260   comdat_group=yes
2261   if test 0"$ld_date" -lt 20050308; then
2262     if test -n "$ld_date"; then
2263       # If there was date string, but was earlier than 2005-03-08, fail
2264       comdat_group=no
2265     elif test "$ld_vers_major" -lt 2; then
2266       comdat_group=no
2267     elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
2268       comdat_group=no
2269     fi
2270   fi
2271 else
2272   # assume linkers other than GNU ld don't support COMDAT group
2273   comdat_group=no
2274 fi
2275 if test $comdat_group = no; then
2276   gcc_cv_as_comdat_group=no
2277   gcc_cv_as_comdat_group_percent=no
2278 fi
2279 AC_DEFINE_UNQUOTED(HAVE_COMDAT_GROUP,
2280   [`if test $gcc_cv_as_comdat_group = yes || test $gcc_cv_as_comdat_group_percent = yes; then echo 1; else echo 0; fi`],
2281 [Define 0/1 if your assembler and linker support COMDAT groups.])
2282
2283 # Thread-local storage - the check is heavily parametrized.
2284 conftest_s=
2285 tls_first_major=
2286 tls_first_minor=
2287 tls_as_opt=
2288 case "$target" in
2289 changequote(,)dnl
2290   alpha*-*-*)
2291     conftest_s='
2292         .section ".tdata","awT",@progbits
2293 foo:    .long   25
2294         .text
2295         ldq     $27,__tls_get_addr($29)         !literal!1
2296         lda     $16,foo($29)                    !tlsgd!1
2297         jsr     $26,($27),__tls_get_addr        !lituse_tlsgd!1
2298         ldq     $27,__tls_get_addr($29)         !literal!2
2299         lda     $16,foo($29)                    !tlsldm!2
2300         jsr     $26,($27),__tls_get_addr        !lituse_tlsldm!2
2301         ldq     $1,foo($29)                     !gotdtprel
2302         ldah    $2,foo($29)                     !dtprelhi
2303         lda     $3,foo($2)                      !dtprello
2304         lda     $4,foo($29)                     !dtprel
2305         ldq     $1,foo($29)                     !gottprel
2306         ldah    $2,foo($29)                     !tprelhi
2307         lda     $3,foo($2)                      !tprello
2308         lda     $4,foo($29)                     !tprel'
2309         tls_first_major=2
2310         tls_first_minor=13
2311         tls_as_opt=--fatal-warnings
2312         ;;
2313   frv*-*-*)
2314     conftest_s='
2315         .section ".tdata","awT",@progbits
2316 x:      .long   25
2317         .text
2318         call    #gettlsoff(x)'
2319         tls_first_major=2
2320         tls_first_minor=14
2321         ;;
2322   hppa*-*-linux*)
2323     conftest_s='
2324 t1:     .reg    %r20
2325 t2:     .reg    %r21
2326 gp:     .reg    %r19
2327         .section ".tdata","awT",@progbits
2328 foo:    .long   25
2329         .text
2330         .align  4
2331         addil LT%foo-$tls_gdidx$,gp
2332         ldo RT%foo-$tls_gdidx$(%r1),%arg0
2333         b __tls_get_addr
2334         nop
2335         addil LT%foo-$tls_ldidx$,gp
2336         b __tls_get_addr
2337         ldo RT%foo-$tls_ldidx$(%r1),%arg0
2338         addil LR%foo-$tls_dtpoff$,%ret0
2339         ldo RR%foo-$tls_dtpoff$(%r1),%t1
2340         mfctl %cr27,%t1
2341         addil LT%foo-$tls_ieoff$,gp
2342         ldw RT%foo-$tls_ieoff$(%r1),%t2
2343         add %t1,%t2,%t3
2344         mfctl %cr27,%t1
2345         addil LR%foo-$tls_leoff$,%t1
2346         ldo RR%foo-$tls_leoff$(%r1),%t2'
2347         tls_first_major=2
2348         tls_first_minor=15
2349         tls_as_opt=--fatal-warnings
2350         ;;
2351   arm*-*-*)
2352     conftest_s='
2353         .section ".tdata","awT",%progbits
2354 foo:    .long   25
2355         .text
2356 .word foo(gottpoff)
2357 .word foo(tpoff)
2358 .word foo(tlsgd)
2359 .word foo(tlsldm)
2360 .word foo(tlsldo)'
2361         tls_first_major=2
2362         tls_first_minor=17
2363         ;;
2364   i[34567]86-*-*)
2365     conftest_s='
2366         .section ".tdata","awT",@progbits
2367 foo:    .long   25
2368         .text
2369         movl    %gs:0, %eax
2370         leal    foo@TLSGD(,%ebx,1), %eax
2371         leal    foo@TLSLDM(%ebx), %eax
2372         leal    foo@DTPOFF(%eax), %edx
2373         movl    foo@GOTTPOFF(%ebx), %eax
2374         subl    foo@GOTTPOFF(%ebx), %eax
2375         addl    foo@GOTNTPOFF(%ebx), %eax
2376         movl    foo@INDNTPOFF, %eax
2377         movl    $foo@TPOFF, %eax
2378         subl    $foo@TPOFF, %eax
2379         leal    foo@NTPOFF(%ecx), %eax'
2380         tls_first_major=2
2381         tls_first_minor=14
2382         tls_as_opt=--fatal-warnings
2383         ;;
2384   x86_64-*-*)
2385     conftest_s='
2386         .section ".tdata","awT",@progbits
2387 foo:    .long   25
2388         .text
2389         movq    %fs:0, %rax
2390         leaq    foo@TLSGD(%rip), %rdi
2391         leaq    foo@TLSLD(%rip), %rdi
2392         leaq    foo@DTPOFF(%rax), %rdx
2393         movq    foo@GOTTPOFF(%rip), %rax
2394         movq    $foo@TPOFF, %rax'
2395         tls_first_major=2
2396         tls_first_minor=14
2397         tls_as_opt=--fatal-warnings
2398         ;;
2399   ia64-*-*)
2400     conftest_s='
2401         .section ".tdata","awT",@progbits
2402 foo:    data8   25
2403         .text
2404         addl    r16 = @ltoff(@dtpmod(foo#)), gp
2405         addl    r17 = @ltoff(@dtprel(foo#)), gp
2406         addl    r18 = @ltoff(@tprel(foo#)), gp
2407         addl    r19 = @dtprel(foo#), gp
2408         adds    r21 = @dtprel(foo#), r13
2409         movl    r23 = @dtprel(foo#)
2410         addl    r20 = @tprel(foo#), gp
2411         adds    r22 = @tprel(foo#), r13
2412         movl    r24 = @tprel(foo#)'
2413         tls_first_major=2
2414         tls_first_minor=13
2415         tls_as_opt=--fatal-warnings
2416         ;;
2417   mips*-*-*)
2418     conftest_s='
2419         .section .tdata,"awT",@progbits
2420 x:
2421         .word 2
2422         .text
2423         addiu $4, $28, %tlsgd(x)
2424         addiu $4, $28, %tlsldm(x)
2425         lui $4, %dtprel_hi(x)
2426         addiu $4, $4, %dtprel_lo(x)
2427         lw $4, %gottprel(x)($28)
2428         lui $4, %tprel_hi(x)
2429         addiu $4, $4, %tprel_lo(x)'
2430         tls_first_major=2
2431         tls_first_minor=16
2432         tls_as_opt='-32 --fatal-warnings'
2433         ;;
2434   powerpc-*-*)
2435     conftest_s='
2436         .section ".tdata","awT",@progbits
2437         .align 2
2438 ld0:    .space 4
2439 ld1:    .space 4
2440 x1:     .space 4
2441 x2:     .space 4
2442 x3:     .space 4
2443         .text
2444         addi 3,31,ld0@got@tlsgd
2445         bl __tls_get_addr
2446         addi 3,31,x1@got@tlsld
2447         bl __tls_get_addr
2448         addi 9,3,x1@dtprel
2449         addis 9,3,x2@dtprel@ha
2450         addi 9,9,x2@dtprel@l
2451         lwz 9,x3@got@tprel(31)
2452         add 9,9,x@tls
2453         addi 9,2,x1@tprel
2454         addis 9,2,x2@tprel@ha
2455         addi 9,9,x2@tprel@l'
2456         tls_first_major=2
2457         tls_first_minor=14
2458         tls_as_opt="-a32 --fatal-warnings"
2459         ;;
2460   powerpc64-*-*)
2461     conftest_s='
2462         .section ".tdata","awT",@progbits
2463         .align 3
2464 ld0:    .space 8
2465 ld1:    .space 8
2466 x1:     .space 8
2467 x2:     .space 8
2468 x3:     .space 8
2469         .text
2470         addi 3,2,ld0@got@tlsgd
2471         bl .__tls_get_addr
2472         nop
2473         addi 3,2,ld1@toc
2474         bl .__tls_get_addr
2475         nop
2476         addi 3,2,x1@got@tlsld
2477         bl .__tls_get_addr
2478         nop
2479         addi 9,3,x1@dtprel
2480         bl .__tls_get_addr
2481         nop
2482         addis 9,3,x2@dtprel@ha
2483         addi 9,9,x2@dtprel@l
2484         bl .__tls_get_addr
2485         nop
2486         ld 9,x3@got@dtprel(2)
2487         add 9,9,3
2488         bl .__tls_get_addr
2489         nop'
2490         tls_first_major=2
2491         tls_first_minor=14
2492         tls_as_opt="-a64 --fatal-warnings"
2493         ;;
2494   s390-*-*)
2495     conftest_s='
2496         .section ".tdata","awT",@progbits
2497 foo:    .long   25
2498         .text
2499         .long   foo@TLSGD
2500         .long   foo@TLSLDM
2501         .long   foo@DTPOFF
2502         .long   foo@NTPOFF
2503         .long   foo@GOTNTPOFF
2504         .long   foo@INDNTPOFF
2505         l       %r1,foo@GOTNTPOFF(%r12)
2506         l       %r1,0(%r1):tls_load:foo
2507         bas     %r14,0(%r1,%r13):tls_gdcall:foo
2508         bas     %r14,0(%r1,%r13):tls_ldcall:foo'
2509         tls_first_major=2
2510         tls_first_minor=14
2511         tls_as_opt="-m31 --fatal-warnings"
2512         ;;
2513   s390x-*-*)
2514     conftest_s='
2515         .section ".tdata","awT",@progbits
2516 foo:    .long   25
2517         .text
2518         .quad   foo@TLSGD
2519         .quad   foo@TLSLDM
2520         .quad   foo@DTPOFF
2521         .quad   foo@NTPOFF
2522         .quad   foo@GOTNTPOFF
2523         lg      %r1,foo@GOTNTPOFF(%r12)
2524         larl    %r1,foo@INDNTPOFF
2525         brasl   %r14,__tls_get_offset@PLT:tls_gdcall:foo
2526         brasl   %r14,__tls_get_offset@PLT:tls_ldcall:foo'
2527         tls_first_major=2
2528         tls_first_minor=14
2529         tls_as_opt="-m64 -Aesame --fatal-warnings"
2530         ;;
2531   sh-*-* | sh[34]-*-*)
2532     conftest_s='
2533         .section ".tdata","awT",@progbits
2534 foo:    .long   25
2535         .text
2536         .long   foo@TLSGD
2537         .long   foo@TLSLDM
2538         .long   foo@DTPOFF
2539         .long   foo@GOTTPOFF
2540         .long   foo@TPOFF'
2541         tls_first_major=2
2542         tls_first_minor=13
2543         tls_as_opt=--fatal-warnings
2544         ;;
2545   sparc*-*-*)
2546     case "$target" in
2547       sparc*-sun-solaris2.[56789]*)
2548         # TLS was introduced in the Solaris 9 4/04 release but
2549         # we do not enable it by default on Solaris 9 either.
2550         if test "x$enable_tls" = xyes ; then
2551           on_solaris=yes
2552         else
2553           enable_tls=no;
2554         fi
2555         ;;
2556       sparc*-sun-solaris2.*)
2557         on_solaris=yes
2558         ;;
2559       *)
2560         on_solaris=no
2561         ;;
2562     esac
2563     if test x$on_solaris = xyes && test x$gas_flag = xno; then
2564       conftest_s='
2565         .section ".tdata",#alloc,#write,#tls
2566 foo:    .long   25
2567         .text
2568         sethi   %tgd_hi22(foo), %o0
2569         add     %o0, %tgd_lo10(foo), %o1
2570         add     %l7, %o1, %o0, %tgd_add(foo)
2571         call    __tls_get_addr, %tgd_call(foo)
2572         sethi   %tldm_hi22(foo), %l1
2573         add     %l1, %tldm_lo10(foo), %l2
2574         add     %l7, %l2, %o0, %tldm_add(foo)
2575         call    __tls_get_addr, %tldm_call(foo)
2576         sethi   %tldo_hix22(foo), %l3
2577         xor     %l3, %tldo_lox10(foo), %l4
2578         add     %o0, %l4, %l5, %tldo_add(foo)
2579         sethi   %tie_hi22(foo), %o3
2580         add     %o3, %tie_lo10(foo), %o3
2581         ld      [%l7 + %o3], %o2, %tie_ld(foo)
2582         add     %g7, %o2, %o4, %tie_add(foo)
2583         sethi   %tle_hix22(foo), %l1
2584         xor     %l1, %tle_lox10(foo), %o5
2585         ld      [%g7 + %o5], %o1'
2586         tls_first_major=0
2587         tls_first_minor=0
2588     else
2589       conftest_s='
2590         .section ".tdata","awT",@progbits
2591 foo:    .long   25
2592         .text
2593         sethi   %tgd_hi22(foo), %o0
2594         add     %o0, %tgd_lo10(foo), %o1
2595         add     %l7, %o1, %o0, %tgd_add(foo)
2596         call    __tls_get_addr, %tgd_call(foo)
2597         sethi   %tldm_hi22(foo), %l1
2598         add     %l1, %tldm_lo10(foo), %l2
2599         add     %l7, %l2, %o0, %tldm_add(foo)
2600         call    __tls_get_addr, %tldm_call(foo)
2601         sethi   %tldo_hix22(foo), %l3
2602         xor     %l3, %tldo_lox10(foo), %l4
2603         add     %o0, %l4, %l5, %tldo_add(foo)
2604         sethi   %tie_hi22(foo), %o3
2605         add     %o3, %tie_lo10(foo), %o3
2606         ld      [%l7 + %o3], %o2, %tie_ld(foo)
2607         add     %g7, %o2, %o4, %tie_add(foo)
2608         sethi   %tle_hix22(foo), %l1
2609         xor     %l1, %tle_lox10(foo), %o5
2610         ld      [%g7 + %o5], %o1'
2611         tls_first_major=2
2612         tls_first_minor=14
2613         tls_as_opt="-32 --fatal-warnings"
2614       fi
2615         ;;
2616 changequote([,])dnl
2617 esac
2618 set_have_as_tls=no
2619 if test "x$enable_tls" = xno ; then
2620   : # TLS explicitly disabled.
2621 elif test "x$enable_tls" = xyes ; then
2622   set_have_as_tls=yes # TLS explicitly enabled.
2623 elif test -z "$tls_first_major"; then
2624   : # If we don't have a check, assume no support.
2625 else
2626   gcc_GAS_CHECK_FEATURE(thread-local storage support, gcc_cv_as_tls,
2627   [$tls_first_major,$tls_first_minor,0], [$tls_as_opt], [$conftest_s],,
2628   [set_have_as_tls=yes])
2629 fi
2630 if test $set_have_as_tls = yes ; then
2631   AC_DEFINE(HAVE_AS_TLS, 1,
2632             [Define if your assembler supports thread-local storage.])
2633 fi
2634
2635 # Target-specific assembler checks.
2636
2637 AC_MSG_CHECKING(linker -Bstatic/-Bdynamic option)
2638 gcc_cv_ld_static_dynamic=no
2639 if test $in_tree_ld = yes ; then
2640   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10; then
2641     gcc_cv_ld_static_dynamic=yes
2642   fi
2643 elif test x$gcc_cv_ld != x; then
2644         # Check if linker supports -Bstatic/-Bdynamic option
2645         if $gcc_cv_ld --help 2>/dev/null | grep -- -Bstatic > /dev/null \
2646           && $gcc_cv_ld --help 2>/dev/null | grep -- -Bdynamic > /dev/null; then
2647                 gcc_cv_ld_static_dynamic=yes
2648         fi
2649 fi
2650 if test x"$gcc_cv_ld_static_dynamic" = xyes; then
2651         AC_DEFINE(HAVE_LD_STATIC_DYNAMIC, 1,
2652 [Define if your linker supports -Bstatic/-Bdynamic option.])
2653 fi
2654 AC_MSG_RESULT($gcc_cv_ld_static_dynamic)
2655
2656 if test x"$demangler_in_ld" = xyes; then
2657   AC_MSG_CHECKING(linker --demangle support)
2658   gcc_cv_ld_demangle=no
2659   if test $in_tree_ld = yes; then
2660     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 14 -o "$gcc_cv_gld_major_version" -gt 2; then \
2661       gcc_cv_ld_demangle=yes
2662     fi
2663   elif test x$gcc_cv_ld != x -a x"$gnu_ld" = xyes; then
2664     # Check if the GNU linker supports --demangle option
2665     if $gcc_cv_ld --help 2>/dev/null | grep no-demangle > /dev/null; then
2666       gcc_cv_ld_demangle=yes
2667     fi
2668   fi
2669   if test x"$gcc_cv_ld_demangle" = xyes; then
2670     AC_DEFINE(HAVE_LD_DEMANGLE, 1,
2671 [Define if your linker supports --demangle option.])
2672   fi
2673   AC_MSG_RESULT($gcc_cv_ld_demangle)
2674 fi
2675
2676 case "$target" in
2677   # All TARGET_ABI_OSF targets.
2678   alpha*-*-osf* | alpha*-*-linux* | alpha*-*-*bsd*)
2679     gcc_GAS_CHECK_FEATURE([explicit relocation support],
2680         gcc_cv_as_alpha_explicit_relocs, [2,12,0],,
2681 [       .set nomacro
2682         .text
2683         extbl   $3, $2, $3      !lituse_bytoff!1
2684         ldq     $2, a($29)      !literal!1
2685         ldq     $4, b($29)      !literal!2
2686         ldq_u   $3, 0($2)       !lituse_base!1
2687         ldq     $27, f($29)     !literal!5
2688         jsr     $26, ($27), f   !lituse_jsr!5
2689         ldah    $29, 0($26)     !gpdisp!3
2690         lda     $0, c($29)      !gprel
2691         ldah    $1, d($29)      !gprelhigh
2692         lda     $1, d($1)       !gprellow
2693         lda     $29, 0($29)     !gpdisp!3],,
2694     [AC_DEFINE(HAVE_AS_EXPLICIT_RELOCS, 1,
2695   [Define if your assembler supports explicit relocations.])])
2696     gcc_GAS_CHECK_FEATURE([jsrdirect relocation support],
2697         gcc_cv_as_alpha_jsrdirect_relocs, [2,16,90],,
2698 [       .set nomacro
2699         .text
2700         ldq     $27, a($29)     !literal!1
2701         jsr     $26, ($27), a   !lituse_jsrdirect!1],,
2702     [AC_DEFINE(HAVE_AS_JSRDIRECT_RELOCS, 1,
2703   [Define if your assembler supports the lituse_jsrdirect relocation.])])
2704     ;;
2705
2706   cris-*-*)
2707     gcc_GAS_CHECK_FEATURE([-no-mul-bug-abort option],
2708       gcc_cv_as_cris_no_mul_bug,[2,15,91],
2709       [-no-mul-bug-abort], [.text],,
2710       [AC_DEFINE(HAVE_AS_NO_MUL_BUG_ABORT_OPTION, 1,
2711                 [Define if your assembler supports the -no-mul-bug-abort option.])])
2712     ;;
2713
2714   sparc*-*-*)
2715     gcc_GAS_CHECK_FEATURE([.register], gcc_cv_as_sparc_register_op,,,
2716       [.register %g2, #scratch],,
2717       [AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
2718                 [Define if your assembler supports .register.])])
2719
2720     gcc_GAS_CHECK_FEATURE([-relax option], gcc_cv_as_sparc_relax,,
2721       [-relax], [.text],,
2722       [AC_DEFINE(HAVE_AS_RELAX_OPTION, 1,
2723                 [Define if your assembler supports -relax option.])])
2724
2725     gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs],
2726       gcc_cv_as_sparc_ua_pcrel,,
2727       [-K PIC],
2728 [.text
2729 foo:
2730         nop
2731 .data
2732 .align 4
2733 .byte 0
2734 .uaword %r_disp32(foo)],
2735       [if test x$gcc_cv_ld != x \
2736        && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
2737          gcc_cv_as_sparc_ua_pcrel=yes
2738        fi
2739        rm -f conftest],
2740       [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
2741                 [Define if your assembler and linker support unaligned PC relative relocs.])
2742
2743       gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs against hidden symbols],
2744         gcc_cv_as_sparc_ua_pcrel_hidden,,
2745         [-K PIC],
2746 [.data
2747 .align 4
2748 .byte 0x31
2749 .uaword %r_disp32(foo)
2750 .byte 0x32, 0x33, 0x34
2751 .global foo
2752 .hidden foo
2753 foo:
2754 .skip 4],
2755         [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
2756          && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1 \
2757          && $gcc_cv_objdump -s -j .data conftest 2> /dev/null \
2758             | grep ' 31000000 07323334' > /dev/null 2>&1; then
2759             if $gcc_cv_objdump -R conftest 2> /dev/null \
2760                | grep 'DISP32' > /dev/null 2>&1; then
2761                 :
2762             else
2763                 gcc_cv_as_sparc_ua_pcrel_hidden=yes
2764             fi
2765          fi
2766          rm -f conftest],
2767          [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL_HIDDEN, 1,
2768                    [Define if your assembler and linker support unaligned PC relative relocs against hidden symbols.])])
2769     ]) # unaligned pcrel relocs
2770
2771     gcc_GAS_CHECK_FEATURE([offsetable %lo()],
2772       gcc_cv_as_sparc_offsetable_lo10,,
2773       [-xarch=v9],
2774 [.text
2775         or %g1, %lo(ab) + 12, %g1
2776         or %g1, %lo(ab + 12), %g1],
2777       [if test x$gcc_cv_objdump != x \
2778        && $gcc_cv_objdump -s -j .text conftest.o 2> /dev/null \
2779           | grep ' 82106000 82106000' > /dev/null 2>&1; then
2780          gcc_cv_as_sparc_offsetable_lo10=yes
2781        fi],
2782        [AC_DEFINE(HAVE_AS_OFFSETABLE_LO10, 1,
2783                  [Define if your assembler supports offsetable %lo().])])
2784     ;;
2785
2786 changequote(,)dnl
2787   i[34567]86-*-* | x86_64-*-*)
2788 changequote([,])dnl
2789     case $target_os in
2790       cygwin* | pe | mingw32*)
2791         # Used for DWARF 2 in PE
2792         gcc_GAS_CHECK_FEATURE([.secrel32 relocs],
2793           gcc_cv_as_ix86_pe_secrel32,
2794           [2,15,91],,
2795 [.text
2796 foo:    nop
2797 .data
2798         .secrel32 foo],
2799           [if test x$gcc_cv_ld != x \
2800            && $gcc_cv_ld -o conftest conftest.o > /dev/null 2>&1; then
2801              gcc_cv_as_ix86_pe_secrel32=yes
2802            fi
2803            rm -f conftest],
2804           [AC_DEFINE(HAVE_GAS_PE_SECREL32_RELOC, 1,
2805             [Define if your assembler and linker support 32-bit section relative relocs via '.secrel32 label'.])])
2806         ;;
2807     esac
2808
2809     gcc_GAS_CHECK_FEATURE([filds and fists mnemonics],
2810        gcc_cv_as_ix86_filds_fists,
2811       [2,9,0],, [filds mem; fists mem],,
2812       [AC_DEFINE(HAVE_GAS_FILDS_FISTS, 1,
2813         [Define if your assembler uses the new HImode fild and fist notation.])])
2814
2815     gcc_GAS_CHECK_FEATURE([cmov syntax],
2816       gcc_cv_as_ix86_cmov_sun_syntax,,,
2817       [cmovl.l %edx, %eax],,
2818       [AC_DEFINE(HAVE_AS_IX86_CMOV_SUN_SYNTAX, 1,
2819         [Define if your assembler supports the Sun syntax for cmov.])])
2820
2821     gcc_GAS_CHECK_FEATURE([ffreep mnemonic],
2822       gcc_cv_as_ix86_ffreep,,,
2823       [ffreep %st(1)],,
2824       [AC_DEFINE(HAVE_AS_IX86_FFREEP, 1,
2825         [Define if your assembler supports the ffreep mnemonic.])])
2826
2827     gcc_GAS_CHECK_FEATURE([sahf mnemonic],
2828       gcc_cv_as_ix86_sahf,,,
2829       [sahf],,
2830       [AC_DEFINE(HAVE_AS_IX86_SAHF, 1,
2831         [Define if your assembler supports the sahf mnemonic.])])
2832
2833     gcc_GAS_CHECK_FEATURE([different section symbol subtraction],
2834       gcc_cv_as_ix86_diff_sect_delta,,,
2835       [.section .rodata
2836 .L1:
2837         .long .L2-.L1
2838         .long .L3-.L1
2839         .text
2840 .L3:    nop
2841 .L2:    nop],,
2842       [AC_DEFINE(HAVE_AS_IX86_DIFF_SECT_DELTA, 1,
2843         [Define if your assembler supports the subtraction of symbols in different sections.])])
2844
2845     # This one is used unconditionally by i386.[ch]; it is to be defined
2846     # to 1 if the feature is present, 0 otherwise.
2847     gcc_GAS_CHECK_FEATURE([GOTOFF in data],
2848         gcc_cv_as_ix86_gotoff_in_data, [2,11,0],,
2849 [       .text
2850 .L0:
2851         nop
2852         .data
2853         .long .L0@GOTOFF])
2854     AC_DEFINE_UNQUOTED(HAVE_AS_GOTOFF_IN_DATA,
2855       [`if test $gcc_cv_as_ix86_gotoff_in_data = yes; then echo 1; else echo 0; fi`],
2856       [Define true if the assembler supports '.long foo@GOTOFF'.])
2857     ;;
2858
2859   ia64*-*-*)
2860     gcc_GAS_CHECK_FEATURE([ltoffx and ldxmov relocs],
2861         gcc_cv_as_ia64_ltoffx_ldxmov_relocs, [2,14,0],,
2862 [       .text
2863         addl r15 = @ltoffx(x#), gp
2864         ;;
2865         ld8.mov r16 = [[r15]], x#],,
2866     [AC_DEFINE(HAVE_AS_LTOFFX_LDXMOV_RELOCS, 1,
2867           [Define if your assembler supports ltoffx and ldxmov relocations.])])
2868
2869     ;;
2870
2871   powerpc*-*-*)
2872     case $target in
2873       *-*-aix*) conftest_s='    .machine "pwr5"
2874         .csect .text[[PR]]
2875         mfcr 3,128';;
2876       *-*-darwin*)
2877         gcc_GAS_CHECK_FEATURE([.machine directive support],
2878           gcc_cv_as_machine_directive,,,
2879           [     .machine ppc7400])
2880         if test x$gcc_cv_as_machine_directive != xyes; then
2881           echo "*** This target requires an assembler supporting \".machine\"" >&2
2882           echo you can get it from: ftp://gcc.gnu.org/pub/gcc/infrastructure/cctools-528.5.dmg >&2
2883           test x$build = x$target && exit 1
2884         fi
2885         conftest_s='    .text
2886         mfcr r3,128';;
2887       *) conftest_s='   .machine power4
2888         .text
2889         mfcr 3,128';;
2890     esac
2891
2892     gcc_GAS_CHECK_FEATURE([mfcr field support],
2893       gcc_cv_as_powerpc_mfcrf, [2,14,0],,
2894       [$conftest_s],,
2895       [AC_DEFINE(HAVE_AS_MFCRF, 1,
2896           [Define if your assembler supports mfcr field.])])
2897
2898     case $target in
2899       *-*-aix*) conftest_s='    .machine "pwr5"
2900         .csect .text[[PR]]
2901         popcntb 3,3';;
2902       *) conftest_s='   .machine power5
2903         .text
2904         popcntb 3,3';;
2905     esac
2906
2907     gcc_GAS_CHECK_FEATURE([popcntb support],
2908       gcc_cv_as_powerpc_popcntb, [2,17,0],,
2909       [$conftest_s],,
2910       [AC_DEFINE(HAVE_AS_POPCNTB, 1,
2911           [Define if your assembler supports popcntb field.])])
2912
2913     case $target in
2914       *-*-aix*) conftest_s='    .machine "pwr5x"
2915         .csect .text[[PR]]
2916         frin 1,1';;
2917       *) conftest_s='   .machine power5
2918         .text
2919         frin 1,1';;
2920     esac
2921
2922     gcc_GAS_CHECK_FEATURE([fp round support],
2923       gcc_cv_as_powerpc_fprnd, [2,17,0],,
2924       [$conftest_s],,
2925       [AC_DEFINE(HAVE_AS_FPRND, 1,
2926           [Define if your assembler supports fprnd.])])
2927
2928     case $target in
2929       *-*-aix*) conftest_s='    .machine "pwr6"
2930         .csect .text[[PR]]
2931         mffgpr 1,3';;
2932       *) conftest_s='   .machine power6
2933         .text
2934         mffgpr 1,3';;
2935     esac
2936
2937     gcc_GAS_CHECK_FEATURE([move fp gpr support],
2938       gcc_cv_as_powerpc_mfpgpr, [9,99,0],,
2939       [$conftest_s],,
2940       [AC_DEFINE(HAVE_AS_MFPGPR, 1,
2941           [Define if your assembler supports mffgpr and mftgpr.])])
2942
2943     case $target in
2944       *-*-aix*) conftest_s='    .csect .text[[PR]]
2945 LCF..0:
2946         addis 11,30,_GLOBAL_OFFSET_TABLE_-LCF..0@ha';;
2947       *-*-darwin*)
2948         conftest_s='    .text
2949 LCF0:
2950         addis r11,r30,_GLOBAL_OFFSET_TABLE_-LCF0@ha';;
2951       *) conftest_s='   .text
2952 .LCF0:
2953         addis 11,30,_GLOBAL_OFFSET_TABLE_-.LCF0@ha';;
2954     esac
2955
2956     gcc_GAS_CHECK_FEATURE([rel16 relocs],
2957       gcc_cv_as_powerpc_rel16, [2,17,0], -a32,
2958       [$conftest_s],,
2959       [AC_DEFINE(HAVE_AS_REL16, 1,
2960           [Define if your assembler supports R_PPC_REL16 relocs.])])
2961
2962     case $target in
2963       *-*-aix*) conftest_s='    .machine "pwr6"
2964         .csect .text[[PR]]
2965         cmpb 3,4,5';;
2966       *) conftest_s='   .machine power6
2967         .text
2968         cmpb 3,4,5';;
2969     esac
2970
2971     gcc_GAS_CHECK_FEATURE([compare bytes support],
2972       gcc_cv_as_powerpc_cmpb, [9,99,0], -a32,
2973       [$conftest_s],,
2974       [AC_DEFINE(HAVE_AS_CMPB, 1,
2975           [Define if your assembler supports cmpb.])])
2976
2977     case $target in
2978       *-*-aix*) conftest_s='    .machine "pwr6"
2979         .csect .text[[PR]]
2980         dadd 1,2,3';;
2981       *) conftest_s='   .machine power6
2982         .text
2983         dadd 1,2,3';;
2984     esac
2985
2986     gcc_GAS_CHECK_FEATURE([decimal float support],
2987       gcc_cv_as_powerpc_dfp, [9,99,0], -a32,
2988       [$conftest_s],,
2989       [AC_DEFINE(HAVE_AS_DFP, 1,
2990           [Define if your assembler supports DFP instructions.])])
2991
2992     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
2993       gcc_cv_as_powerpc_gnu_attribute, [2,18,0],,
2994       [.gnu_attribute 4,1],,
2995       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
2996           [Define if your assembler supports .gnu_attribute.])])
2997     ;;
2998
2999   mips*-*-*)
3000     gcc_GAS_CHECK_FEATURE([explicit relocation support],
3001       gcc_cv_as_mips_explicit_relocs, [2,14,0],,
3002 [       lw $4,%gp_rel(foo)($4)],,
3003       [if test x$target_cpu_default = x
3004        then target_cpu_default=MASK_EXPLICIT_RELOCS
3005        else target_cpu_default="($target_cpu_default)|MASK_EXPLICIT_RELOCS"
3006        fi])
3007     gcc_GAS_CHECK_FEATURE([-mno-shared support],
3008       gcc_cv_as_mips_no_shared, [2,16,0], [-mno-shared], [nop],,
3009       [AC_DEFINE(HAVE_AS_NO_SHARED, 1,
3010                  [Define if the assembler understands -mno-shared.])])
3011
3012     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
3013       gcc_cv_as_mips_gnu_attribute, [2,18,0],,
3014       [.gnu_attribute 4,1],,
3015       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
3016           [Define if your assembler supports .gnu_attribute.])])
3017
3018     gcc_GAS_CHECK_FEATURE([.dtprelword support],
3019       gcc_cv_as_mips_dtprelword, [2,18,0],,
3020       [.section .tdata,"awT",@progbits
3021 x:
3022         .word 2
3023         .text
3024         .dtprelword x+0x8000],,
3025       [AC_DEFINE(HAVE_AS_DTPRELWORD, 1,
3026           [Define if your assembler supports .dtprelword.])])
3027     ;;
3028 esac
3029
3030 # Mips and HP-UX need the GNU assembler.
3031 # Linux on IA64 might be able to use the Intel assembler.
3032
3033 case "$target" in
3034   mips*-*-* | *-*-hpux* )
3035     if test x$gas_flag = xyes \
3036        || test x"$host" != x"$build" \
3037        || test ! -x "$gcc_cv_as" \
3038        || "$gcc_cv_as" -v < /dev/null 2>&1 | grep GNU > /dev/null; then
3039       :
3040     else
3041       echo "*** This configuration requires the GNU assembler" >&2
3042       exit 1
3043     fi
3044     ;;
3045 esac
3046
3047 # ??? Not all targets support dwarf2 debug_line, even within a version
3048 # of gas.  Moreover, we need to emit a valid instruction to trigger any
3049 # info to the output file.  So, as supported targets are added to gas 2.11,
3050 # add some instruction here to (also) show we expect this might work.
3051 # ??? Once 2.11 is released, probably need to add first known working
3052 # version to the per-target configury.
3053 case "$target" in
3054   i?86*-*-* | mips*-*-* | alpha*-*-* | powerpc*-*-* | sparc*-*-* | m68*-*-* \
3055   | x86_64*-*-* | hppa*-*-* | arm*-*-* | strongarm*-*-* | xscale*-*-* \
3056   | xstormy16*-*-* | cris-*-* | xtensa-*-* | bfin-*-* | score*-*-* | spu-*-*)
3057     insn="nop"
3058     ;;
3059   ia64*-*-* | s390*-*-*)
3060     insn="nop 0"
3061     ;;
3062   mmix-*-*)
3063     insn="swym 0"
3064     ;;
3065 esac
3066 if test x"$insn" != x; then
3067  conftest_s="\
3068         .file 1 \"conftest.s\"
3069         .loc 1 3 0
3070         $insn"
3071  gcc_GAS_CHECK_FEATURE([dwarf2 debug_line support],
3072   gcc_cv_as_dwarf2_debug_line,
3073   [elf,2,11,0],, [$conftest_s],
3074   [if test x$gcc_cv_objdump != x \
3075    && $gcc_cv_objdump -h conftest.o 2> /dev/null \
3076       | grep debug_line > /dev/null 2>&1; then
3077      gcc_cv_as_dwarf2_debug_line=yes
3078    fi])
3079
3080 # The .debug_line file table must be in the exact order that
3081 # we specified the files, since these indices are also used
3082 # by DW_AT_decl_file.  Approximate this test by testing if
3083 # the assembler bitches if the same index is assigned twice.
3084  gcc_GAS_CHECK_FEATURE([buggy dwarf2 .file directive],
3085   gcc_cv_as_dwarf2_file_buggy,,,
3086 [       .file 1 "foo.s"
3087         .file 1 "bar.s"])
3088
3089  if test $gcc_cv_as_dwarf2_debug_line = yes \
3090  && test $gcc_cv_as_dwarf2_file_buggy = no; then
3091         AC_DEFINE(HAVE_AS_DWARF2_DEBUG_LINE, 1,
3092   [Define if your assembler supports dwarf2 .file/.loc directives,
3093    and preserves file table indices exactly as given.])
3094  fi
3095
3096  gcc_GAS_CHECK_FEATURE([--gdwarf2 option],
3097   gcc_cv_as_gdwarf2_flag,
3098   [elf,2,11,0], [--gdwarf2], [$insn],,
3099   [AC_DEFINE(HAVE_AS_GDWARF2_DEBUG_FLAG, 1,
3100 [Define if your assembler supports the --gdwarf2 option.])])
3101
3102  gcc_GAS_CHECK_FEATURE([--gstabs option],
3103   gcc_cv_as_gstabs_flag,
3104   [elf,2,11,0], [--gstabs], [$insn],
3105   [# The native Solaris 9/Intel assembler doesn't understand --gstabs
3106    # and warns about it, but still exits successfully.  So check for
3107    # this.
3108    if AC_TRY_COMMAND([$gcc_cv_as --gstabs -o conftest.o conftest.s 2>&1 | grep -i warning > /dev/null])
3109    then :
3110    else gcc_cv_as_gstabs_flag=yes
3111    fi],
3112   [AC_DEFINE(HAVE_AS_GSTABS_DEBUG_FLAG, 1,
3113 [Define if your assembler supports the --gstabs option.])])
3114
3115  gcc_GAS_CHECK_FEATURE([--debug-prefix-map option],
3116   gcc_cv_as_debug_prefix_map_flag,
3117   [2,18,0], [--debug-prefix-map /a=/b], [$insn],,
3118   [AC_DEFINE(HAVE_AS_DEBUG_PREFIX_MAP, 1,
3119 [Define if your assembler supports the --debug-prefix-map option.])])
3120 fi
3121
3122 AC_CACHE_CHECK([assembler for tolerance to line number 0],
3123  [gcc_cv_as_line_zero],
3124  [gcc_cv_as_line_zero=no
3125   if test $in_tree_gas = yes; then
3126     gcc_GAS_VERSION_GTE_IFELSE(2, 16, 91, [gcc_cv_as_line_zero=yes])
3127   elif test "x$gcc_cv_as" != x; then
3128     { echo '# 1 "test.s" 1'; echo '# 0 "" 2'; } > conftest.s
3129     if AC_TRY_COMMAND([$gcc_cv_as -o conftest.o conftest.s >&AS_MESSAGE_LOG_FD 2>conftest.out]) &&
3130        test "x`cat conftest.out`" = x
3131     then
3132       gcc_cv_as_line_zero=yes
3133     else
3134       echo "configure: failed program was" >&AS_MESSAGE_LOG_FD
3135       cat conftest.s >&AS_MESSAGE_LOG_FD
3136       echo "configure: error output was" >&AS_MESSAGE_LOG_FD
3137       cat conftest.out >&AS_MESSAGE_LOG_FD
3138     fi
3139     rm -f conftest.o conftest.s conftest.out
3140   fi])
3141 if test "x$gcc_cv_as_line_zero" = xyes; then
3142   AC_DEFINE([HAVE_AS_LINE_ZERO], 1,
3143 [Define if the assembler won't complain about a line such as # 0 "" 2.])
3144 fi
3145
3146 AC_MSG_CHECKING(linker read-only and read-write section mixing)
3147 gcc_cv_ld_ro_rw_mix=unknown
3148 if test $in_tree_ld = yes ; then
3149   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2 \
3150      && test $in_tree_ld_is_elf = yes; then
3151     gcc_cv_ld_ro_rw_mix=read-write
3152   fi
3153 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
3154   echo '.section myfoosect, "a"' > conftest1.s
3155   echo '.section myfoosect, "aw"' > conftest2.s
3156   echo '.byte 1' >> conftest2.s
3157   echo '.section myfoosect, "a"' > conftest3.s
3158   echo '.byte 0' >> conftest3.s
3159   if $gcc_cv_as -o conftest1.o conftest1.s > /dev/null 2>&1 \
3160      && $gcc_cv_as -o conftest2.o conftest2.s > /dev/null 2>&1 \
3161      && $gcc_cv_as -o conftest3.o conftest3.s > /dev/null 2>&1 \
3162      && $gcc_cv_ld -shared -o conftest1.so conftest1.o \
3163         conftest2.o conftest3.o > /dev/null 2>&1; then
3164     gcc_cv_ld_ro_rw_mix=`$gcc_cv_objdump -h conftest1.so \
3165                          | sed -e '/myfoosect/!d' -e N`
3166     if echo "$gcc_cv_ld_ro_rw_mix" | grep CONTENTS > /dev/null; then
3167       if echo "$gcc_cv_ld_ro_rw_mix" | grep READONLY > /dev/null; then
3168         gcc_cv_ld_ro_rw_mix=read-only
3169       else
3170         gcc_cv_ld_ro_rw_mix=read-write
3171       fi
3172     fi
3173   fi
3174 changequote(,)dnl
3175   rm -f conftest.* conftest[123].*
3176 changequote([,])dnl
3177 fi
3178 if test x$gcc_cv_ld_ro_rw_mix = xread-write; then
3179         AC_DEFINE(HAVE_LD_RO_RW_SECTION_MIXING, 1,
3180   [Define if your linker links a mix of read-only
3181    and read-write sections into a read-write section.])
3182 fi
3183 AC_MSG_RESULT($gcc_cv_ld_ro_rw_mix)
3184
3185 AC_MSG_CHECKING(linker PT_GNU_EH_FRAME support)
3186 gcc_cv_ld_eh_frame_hdr=no
3187 if test $in_tree_ld = yes ; then
3188   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 12 -o "$gcc_cv_gld_major_version" -gt 2 \
3189      && test $in_tree_ld_is_elf = yes; then
3190     gcc_cv_ld_eh_frame_hdr=yes
3191   fi
3192 elif test x$gcc_cv_ld != x; then
3193         # Check if linker supports --eh-frame-hdr option
3194         if $gcc_cv_ld --help 2>/dev/null | grep eh-frame-hdr > /dev/null; then
3195                 gcc_cv_ld_eh_frame_hdr=yes
3196         fi
3197 fi
3198 GCC_TARGET_TEMPLATE([HAVE_LD_EH_FRAME_HDR])
3199 if test x"$gcc_cv_ld_eh_frame_hdr" = xyes; then
3200         AC_DEFINE(HAVE_LD_EH_FRAME_HDR, 1,
3201 [Define if your linker supports --eh-frame-hdr option.])
3202 fi
3203 AC_MSG_RESULT($gcc_cv_ld_eh_frame_hdr)
3204
3205 AC_MSG_CHECKING(linker position independent executable support)
3206 gcc_cv_ld_pie=no
3207 if test $in_tree_ld = yes ; then
3208   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 15 -o "$gcc_cv_gld_major_version" -gt 2 \
3209      && test $in_tree_ld_is_elf = yes; then
3210     gcc_cv_ld_pie=yes
3211   fi
3212 elif test x$gcc_cv_ld != x; then
3213         # Check if linker supports -pie option
3214         if $gcc_cv_ld --help 2>/dev/null | grep -- -pie > /dev/null; then
3215                 gcc_cv_ld_pie=yes
3216         fi
3217 fi
3218 if test x"$gcc_cv_ld_pie" = xyes; then
3219         AC_DEFINE(HAVE_LD_PIE, 1,
3220 [Define if your linker supports -pie option.])
3221 fi
3222 AC_MSG_RESULT($gcc_cv_ld_pie)
3223
3224 AC_MSG_CHECKING(linker EH-compatible garbage collection of sections)
3225 gcc_cv_ld_eh_gc_sections=no
3226 if test $in_tree_ld = yes ; then
3227   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 17 -o "$gcc_cv_gld_major_version" -gt 2 \
3228      && test $in_tree_ld_is_elf = yes; then
3229     gcc_cv_ld_eh_gc_sections=yes
3230   fi
3231 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
3232   cat > conftest.s <<EOF
3233         .section        .text
3234 .globl _start
3235         .type _start, @function
3236 _start:
3237         .long foo
3238         .size _start, .-_start
3239         .section        .text.foo,"ax",@progbits
3240         .type foo, @function
3241 foo:
3242         .long 0
3243         .size foo, .-foo
3244         .section        .gcc_except_table.foo,"a",@progbits
3245 .L0:
3246         .long 0
3247         .section        .eh_frame,"a",@progbits
3248         .long .L0
3249 EOF
3250   if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
3251     if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
3252          | grep "gc-sections option ignored" > /dev/null; then
3253       gcc_cv_ld_eh_gc_sections=no
3254     elif $gcc_cv_objdump -h conftest | grep gcc_except_table > /dev/null; then
3255       gcc_cv_ld_eh_gc_sections=yes
3256       # If no COMDAT groups, the compiler will emit .gnu.linkonce.t. sections.
3257       if test x$gcc_cv_as_comdat_group != xyes; then
3258         gcc_cv_ld_eh_gc_sections=no
3259         cat > conftest.s <<EOF
3260         .section        .text
3261 .globl _start
3262         .type _start, @function
3263 _start:
3264         .long foo
3265         .size _start, .-_start
3266         .section        .gnu.linkonce.t.foo,"ax",@progbits
3267         .type foo, @function
3268 foo:
3269         .long 0
3270         .size foo, .-foo
3271         .section        .gcc_except_table.foo,"a",@progbits
3272 .L0:
3273         .long 0
3274         .section        .eh_frame,"a",@progbits
3275         .long .L0
3276 EOF
3277         if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
3278           if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
3279                | grep "gc-sections option ignored" > /dev/null; then
3280             gcc_cv_ld_eh_gc_sections=no
3281           elif $gcc_cv_objdump -h conftest | grep gcc_except_table > /dev/null; then
3282             gcc_cv_ld_eh_gc_sections=yes
3283           fi
3284         fi
3285       fi
3286     fi
3287   fi
3288   rm -f conftest.s conftest.o conftest
3289 fi
3290 case "$target" in
3291   hppa*-*-linux*)
3292     # ??? This apparently exposes a binutils bug with PC-relative relocations.
3293     gcc_cv_ld_eh_gc_sections=no
3294     ;;
3295 esac
3296 if test x$gcc_cv_ld_eh_gc_sections = xyes; then
3297         AC_DEFINE(HAVE_LD_EH_GC_SECTIONS, 1,
3298   [Define if your linker supports garbage collection of
3299    sections in presence of EH frames.])
3300 fi
3301 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections)
3302
3303 # --------
3304 # UNSORTED
3305 # --------
3306
3307 AC_CACHE_CHECK(linker --as-needed support,
3308 gcc_cv_ld_as_needed,
3309 [gcc_cv_ld_as_needed=no
3310 if test $in_tree_ld = yes ; then
3311   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
3312      && test $in_tree_ld_is_elf = yes; then
3313     gcc_cv_ld_as_needed=yes
3314   fi
3315 elif test x$gcc_cv_ld != x; then
3316         # Check if linker supports --as-needed and --no-as-needed options
3317         if $gcc_cv_ld --help 2>/dev/null | grep as-needed > /dev/null; then
3318                 gcc_cv_ld_as_needed=yes
3319         fi
3320 fi
3321 ])
3322 if test x"$gcc_cv_ld_as_needed" = xyes; then
3323         AC_DEFINE(HAVE_LD_AS_NEEDED, 1,
3324 [Define if your linker supports --as-needed and --no-as-needed options.])
3325 fi
3326
3327 case "$target:$tm_file" in
3328   powerpc64*-*-linux* | powerpc*-*-linux*rs6000/biarch64.h*)
3329     AC_CACHE_CHECK(linker support for omitting dot symbols,
3330     gcc_cv_ld_no_dot_syms,
3331     [gcc_cv_ld_no_dot_syms=no
3332     if test $in_tree_ld = yes ; then
3333       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2; then
3334         gcc_cv_ld_no_dot_syms=yes
3335       fi
3336     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
3337       cat > conftest1.s <<EOF
3338         .text
3339         bl .foo
3340 EOF
3341       cat > conftest2.s <<EOF
3342         .section ".opd","aw"
3343         .align 3
3344         .globl foo
3345         .type foo,@function
3346 foo:
3347         .quad .LEfoo,.TOC.@tocbase,0
3348         .text
3349 .LEfoo:
3350         blr
3351         .size foo,.-.LEfoo
3352 EOF
3353       if $gcc_cv_as -a64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
3354          && $gcc_cv_as -a64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
3355          && $gcc_cv_ld -melf64ppc -o conftest conftest1.o conftest2.o > /dev/null 2>&1; then
3356         gcc_cv_ld_no_dot_syms=yes
3357       fi
3358       rm -f conftest conftest1.o conftest2.o conftest1.s conftest2.s
3359     fi
3360     ])
3361     if test x"$gcc_cv_ld_no_dot_syms" = xyes; then
3362       AC_DEFINE(HAVE_LD_NO_DOT_SYMS, 1,
3363     [Define if your PowerPC64 linker only needs function descriptor syms.])
3364     fi
3365     ;;
3366 esac
3367
3368 AC_CACHE_CHECK(linker --sysroot support,
3369   gcc_cv_ld_sysroot,
3370   [gcc_cv_ld_sysroot=no
3371   if test $in_tree_ld = yes ; then
3372       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 ; then
3373         gcc_cv_ld_sysroot=yes
3374       fi
3375   elif test x$gcc_cv_ld != x; then
3376     if $gcc_cv_ld --help 2>/dev/null | grep sysroot > /dev/null; then
3377       gcc_cv_ld_sysroot=yes
3378     fi
3379   fi])
3380 if test x"$gcc_cv_ld_sysroot" = xyes; then
3381   AC_DEFINE(HAVE_LD_SYSROOT, 1,
3382   [Define if your linker supports --sysroot.])
3383 fi
3384
3385 if test x$with_sysroot = x && test x$host = x$target \
3386    && test "$prefix" != "/usr" && test "x$prefix" != "x$local_prefix" \
3387    && test "$prefix" != "NONE"; then
3388   AC_DEFINE_UNQUOTED(PREFIX_INCLUDE_DIR, "$prefix/include",
3389 [Define to PREFIX/include if cpp should also search that directory.])
3390 fi
3391
3392 # Test for stack protector support in target C library.
3393 AC_CACHE_CHECK(__stack_chk_fail in target C library,
3394       gcc_cv_libc_provides_ssp,
3395       [gcc_cv_libc_provides_ssp=no
3396     case "$target" in
3397        *-*-linux*)
3398       if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x; then
3399         if test "x$with_sysroot" = x; then
3400           glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-include"
3401         elif test "x$with_build_sysroot" != "x"; then
3402           glibc_header_dir="${with_build_sysroot}/usr/include"
3403         elif test "x$with_sysroot" = xyes; then
3404           glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-root/usr/include"
3405         else
3406           glibc_header_dir="${with_sysroot}/usr/include"
3407         fi
3408       else
3409         glibc_header_dir=/usr/include
3410       fi
3411       # glibc 2.4 and later provides __stack_chk_fail and
3412       # either __stack_chk_guard, or TLS access to stack guard canary.
3413       if test -f $glibc_header_dir/features.h \
3414          && $EGREP '^@<:@       @:>@*#[         ]*define[       ]+__GNU_LIBRARY__[      ]+([1-9][0-9]|[6-9])' \
3415             $glibc_header_dir/features.h > /dev/null; then
3416         if $EGREP '^@<:@        @:>@*#[         ]*define[       ]+__GLIBC__[    ]+([1-9][0-9]|[3-9])' \
3417            $glibc_header_dir/features.h > /dev/null; then
3418           gcc_cv_libc_provides_ssp=yes
3419         elif $EGREP '^@<:@      @:>@*#[         ]*define[       ]+__GLIBC__[    ]+2' \
3420              $glibc_header_dir/features.h > /dev/null \
3421              && $EGREP '^@<:@   @:>@*#[         ]*define[       ]+__GLIBC_MINOR__[      ]+([1-9][0-9]|[4-9])' \
3422              $glibc_header_dir/features.h > /dev/null; then
3423           gcc_cv_libc_provides_ssp=yes
3424         elif $EGREP '^@<:@      @:>@*#[         ]*define[       ]+__UCLIBC__[   ]+1' \
3425              $glibc_header_dir/features.h > /dev/null && \
3426              test -f $glibc_header_dir/bits/uClibc_config.h && \
3427              $EGREP '^@<:@      @:>@*#[         ]*define[       ]+__UCLIBC_HAS_SSP__[   ]+1' \
3428              $glibc_header_dir/bits/uClibc_config.h > /dev/null; then
3429           gcc_cv_libc_provides_ssp=yes
3430         fi
3431       fi
3432         ;;
3433        *-*-darwin*)
3434          AC_CHECK_FUNC(__stack_chk_fail,[gcc_cv_libc_provides_ssp=yes],
3435            [echo "no __stack_chk_fail on this target"])
3436         ;;
3437   *) gcc_cv_libc_provides_ssp=no ;;
3438     esac])
3439
3440 if test x$gcc_cv_libc_provides_ssp = xyes; then
3441   AC_DEFINE(TARGET_LIBC_PROVIDES_SSP, 1,
3442             [Define if your target C library provides stack protector support])
3443 fi
3444
3445 # Check if TFmode long double should be used by default or not.
3446 # Some glibc targets used DFmode long double, but with glibc 2.4
3447 # and later they can use TFmode.
3448 case "$target" in
3449   powerpc*-*-linux* | \
3450   powerpc*-*-gnu* | \
3451   sparc*-*-linux* | \
3452   s390*-*-linux* | \
3453   alpha*-*-linux*)
3454     AC_ARG_WITH(long-double-128,
3455 [  --with-long-double-128  Use 128-bit long double by default.],
3456       gcc_cv_target_ldbl128="$with_long_double_128",
3457       [gcc_cv_target_ldbl128=no
3458       if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x; then
3459         if test "x$with_sysroot" = x; then
3460           glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-include"
3461         elif test "x$with_build_sysroot" != "x"; then
3462           glibc_header_dir="${with_build_sysroot}/usr/include"
3463         elif test "x$with_sysroot" = xyes; then
3464           glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-root/usr/include"
3465         else
3466           glibc_header_dir="${with_sysroot}/usr/include"
3467         fi
3468       else
3469         glibc_header_dir=/usr/include
3470       fi
3471 changequote(,)dnl
3472       grep '^[  ]*#[    ]*define[       ][      ]*__LONG_DOUBLE_MATH_OPTIONAL' \
3473         $glibc_header_dir/bits/wordsize.h > /dev/null 2>&1 \
3474       && gcc_cv_target_ldbl128=yes
3475 changequote([,])dnl
3476       ])
3477     ;;
3478 esac
3479 if test x$gcc_cv_target_ldbl128 = xyes; then
3480   AC_DEFINE(TARGET_DEFAULT_LONG_DOUBLE_128, 1,
3481             [Define if TFmode long double should be the default])
3482 fi
3483
3484 # Find out what GC implementation we want, or may, use.
3485 AC_ARG_WITH(gc,
3486 [  --with-gc={page,zone}   choose the garbage collection mechanism to use
3487                           with the compiler],
3488 [case "$withval" in
3489   page)
3490     GGC=ggc-$withval
3491     ;;
3492   zone)
3493     GGC=ggc-$withval
3494     AC_DEFINE(GGC_ZONE, 1, [Define if the zone collector is in use])
3495     ;;
3496   *)
3497     AC_MSG_ERROR([$withval is an invalid option to --with-gc])
3498     ;;
3499 esac],
3500 [GGC=ggc-page])
3501 AC_SUBST(GGC)
3502 echo "Using $GGC for garbage collection."
3503
3504 # Use the system's zlib library.
3505 zlibdir=-L../zlib
3506 zlibinc="-I\$(srcdir)/../zlib"
3507 AC_ARG_WITH(system-zlib,
3508 [  --with-system-zlib      use installed libz],
3509 zlibdir=
3510 zlibinc=
3511 )
3512 AC_SUBST(zlibdir)
3513 AC_SUBST(zlibinc)
3514
3515 dnl Very limited version of automake's enable-maintainer-mode
3516
3517 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
3518   dnl maintainer-mode is disabled by default
3519   AC_ARG_ENABLE(maintainer-mode,
3520 [  --enable-maintainer-mode
3521                           enable make rules and dependencies not useful
3522                           (and sometimes confusing) to the casual installer],
3523       maintainer_mode=$enableval,
3524       maintainer_mode=no)
3525
3526 AC_MSG_RESULT($maintainer_mode)
3527
3528 if test "$maintainer_mode" = "yes"; then
3529   MAINT=''
3530 else
3531   MAINT='#'
3532 fi
3533 AC_SUBST(MAINT)dnl
3534
3535 # --------------
3536 # Language hooks
3537 # --------------
3538
3539 # Make empty files to contain the specs and options for each language.
3540 # Then add #include lines to for a compiler that has specs and/or options.
3541
3542 subdirs=
3543 lang_opt_files=
3544 lang_specs_files=
3545 lang_tree_files=
3546 # These (without "all_") are set in each config-lang.in.
3547 # `language' must be a single word so is spelled singularly.
3548 all_languages=
3549 all_compilers=
3550 all_outputs='Makefile gccbug libada-mk'
3551 # List of language makefile fragments.
3552 all_lang_makefrags=
3553 # List of language subdirectory makefiles.  Deprecated.
3554 all_lang_makefiles=
3555 # Additional files for gengtype
3556 all_gtfiles="$target_gtfiles"
3557
3558 # These are the languages that are set in --enable-languages,
3559 # and are available in the GCC tree.
3560 all_selected_languages=
3561
3562 # Add the language fragments.
3563 # Languages are added via two mechanisms.  Some information must be
3564 # recorded in makefile variables, these are defined in config-lang.in.
3565 # We accumulate them and plug them into the main Makefile.
3566 # The other mechanism is a set of hooks for each of the main targets
3567 # like `clean', `install', etc.
3568
3569 language_hooks="Make-hooks"
3570
3571 for lang in ${srcdir}/*/config-lang.in
3572 do
3573 changequote(,)dnl
3574         test "$lang" = "${srcdir}/*/config-lang.in" && continue
3575
3576         lang_alias=`sed -n -e 's,^language=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^language=\([^   ]*\).*$,\1,p' $lang`
3577         if test "x$lang_alias" = x
3578         then
3579               echo "$lang doesn't set \$language." 1>&2
3580               exit 1
3581         fi
3582         subdir="`echo $lang | sed -e 's,^.*/\([^/]*\)/config-lang.in$,\1,'`"
3583         subdirs="$subdirs $subdir"
3584         case ",$enable_languages," in
3585         *,$lang_alias,*)
3586             all_selected_languages="$all_selected_languages $lang_alias"
3587             if test -f $srcdir/$subdir/lang-specs.h; then
3588                 lang_specs_files="$lang_specs_files $srcdir/$subdir/lang-specs.h"
3589             fi
3590             ;;
3591         esac
3592 changequote([,])dnl
3593
3594         language=
3595         boot_language=
3596         compilers=
3597         outputs=
3598         gtfiles=
3599         subdir_requires=
3600         . ${srcdir}/$subdir/config-lang.in
3601         if test "x$language" = x
3602         then
3603                 echo "${srcdir}/$subdir/config-lang.in doesn't set \$language." 1>&2
3604                 exit 1
3605         fi
3606
3607         ok=:
3608         case ",$enable_languages," in
3609                 *,$lang_alias,*) ;;
3610                 *)
3611                         for i in $subdir_requires; do
3612                                 test -f "${srcdir}/$i/config-lang.in" && continue
3613                                 ok=false
3614                                 break
3615                         done
3616                 ;;
3617         esac
3618         $ok || continue
3619
3620         all_lang_makefrags="$all_lang_makefrags \$(srcdir)/$subdir/Make-lang.in"
3621         if test -f $srcdir/$subdir/lang.opt; then
3622             lang_opt_files="$lang_opt_files $srcdir/$subdir/lang.opt"
3623         fi
3624         if test -f $srcdir/$subdir/$subdir-tree.def; then
3625             lang_tree_files="$lang_tree_files $srcdir/$subdir/$subdir-tree.def"
3626         fi
3627         if test -f ${srcdir}/$subdir/Makefile.in
3628                 then all_lang_makefiles="$subdir/Makefile"
3629         fi
3630         all_languages="$all_languages $language"
3631         all_compilers="$all_compilers $compilers"
3632         all_outputs="$all_outputs $outputs"
3633         all_gtfiles="$all_gtfiles [[$subdir]] $gtfiles"
3634 done
3635
3636 # Pick up gtfiles for c
3637 gtfiles=
3638 . ${srcdir}/c-config-lang.in
3639 all_gtfiles="$all_gtfiles [[c]] $gtfiles"
3640
3641 check_languages=
3642 for language in $all_selected_languages
3643 do
3644         check_languages="$check_languages check-$language"
3645 done
3646
3647 # We link each language in with a set of hooks, reached indirectly via
3648 # lang.${target}.  Only do so for selected languages.
3649
3650 rm -f Make-hooks
3651 touch Make-hooks
3652 target_list="all.cross start.encap rest.encap tags \
3653         install-common install-man install-info install-pdf dvi pdf \
3654         html uninstall info man srcextra srcman srcinfo \
3655         mostlyclean clean distclean maintainer-clean"
3656
3657 for t in $target_list
3658 do
3659         x=
3660         for lang in $all_selected_languages
3661         do
3662                 x="$x $lang.$t"
3663         done
3664         echo "lang.$t: $x" >> Make-hooks
3665 done
3666
3667 # --------
3668 # UNSORTED
3669 # --------
3670
3671 # Create .gdbinit.
3672
3673 echo "dir ." > .gdbinit
3674 echo "dir ${srcdir}" >> .gdbinit
3675 if test x$gdb_needs_out_file_path = xyes
3676 then
3677         echo "dir ${srcdir}/config/"`dirname ${out_file}` >> .gdbinit
3678 fi
3679 if test "x$subdirs" != x; then
3680         for s in $subdirs
3681         do
3682                 echo "dir ${srcdir}/$s" >> .gdbinit
3683         done
3684 fi
3685 echo "source ${srcdir}/gdbinit.in" >> .gdbinit
3686
3687 gcc_tooldir='$(libsubdir)/$(libsubdir_to_prefix)$(target_noncanonical)'
3688 AC_SUBST(gcc_tooldir)
3689 AC_SUBST(dollar)
3690
3691 # Find a directory in which to install a shared libgcc.
3692
3693 AC_ARG_ENABLE(version-specific-runtime-libs,
3694 [  --enable-version-specific-runtime-libs
3695                           specify that runtime libraries should be
3696                           installed in a compiler-specific directory])
3697
3698 AC_ARG_WITH(slibdir,
3699 [  --with-slibdir=DIR      shared libraries in DIR [[LIBDIR]]],
3700 slibdir="$with_slibdir",
3701 if test "${enable_version_specific_runtime_libs+set}" = set; then
3702   slibdir='$(libsubdir)'
3703 elif test "$host" != "$target"; then
3704   slibdir='$(build_tooldir)/lib'
3705 else
3706   slibdir='$(libdir)'
3707 fi)
3708 AC_SUBST(slibdir)
3709
3710 AC_ARG_WITH(datarootdir,
3711 [  --with-datarootdir=DIR  Use DIR as the data root [[PREFIX/share]]],
3712 datarootdir="\${prefix}/$with_datarootdir",
3713 datarootdir='$(prefix)/share')
3714 AC_SUBST(datarootdir)
3715
3716 AC_ARG_WITH(docdir,
3717 [  --with-docdir=DIR       Install documentation in DIR [[DATAROOTDIR]]],
3718 docdir="\${prefix}/$with_docdir",
3719 docdir='$(datarootdir)')
3720 AC_SUBST(docdir)
3721
3722 AC_ARG_WITH(htmldir,
3723 [  --with-htmldir=DIR      html documentation in in DIR [[DOCDIR]]],
3724 htmldir="\${prefix}/$with_htmldir",
3725 htmldir='$(docdir)')
3726 AC_SUBST(htmldir)
3727
3728 # Substitute configuration variables
3729 AC_SUBST(subdirs)
3730 AC_SUBST(srcdir)
3731 AC_SUBST(all_compilers)
3732 AC_SUBST(all_gtfiles)
3733 AC_SUBST(all_lang_makefrags)
3734 AC_SUBST(all_lang_makefiles)
3735 AC_SUBST(all_languages)
3736 AC_SUBST(all_selected_languages)
3737 AC_SUBST(build_exeext)
3738 AC_SUBST(build_install_headers_dir)
3739 AC_SUBST(build_xm_file_list)
3740 AC_SUBST(build_xm_include_list)
3741 AC_SUBST(build_xm_defines)
3742 AC_SUBST(build_file_translate)
3743 AC_SUBST(check_languages)
3744 AC_SUBST(cpp_install_dir)
3745 AC_SUBST(xmake_file)
3746 AC_SUBST(tmake_file)
3747 AC_SUBST(extra_gcc_objs)
3748 AC_SUBST(extra_headers_list)
3749 AC_SUBST(extra_objs)
3750 AC_SUBST(extra_parts)
3751 AC_SUBST(extra_passes)
3752 AC_SUBST(extra_programs)
3753 AC_SUBST(float_h_file)
3754 AC_SUBST(gcc_config_arguments)
3755 AC_SUBST(gcc_gxx_include_dir)
3756 AC_SUBST(host_exeext)
3757 AC_SUBST(host_xm_file_list)
3758 AC_SUBST(host_xm_include_list)
3759 AC_SUBST(host_xm_defines)
3760 AC_SUBST(out_host_hook_obj)
3761 AC_SUBST(install)
3762 AC_SUBST(lang_opt_files)
3763 AC_SUBST(lang_specs_files)
3764 AC_SUBST(lang_tree_files)
3765 AC_SUBST(local_prefix)
3766 AC_SUBST(md_file)
3767 AC_SUBST(objc_boehm_gc)
3768 AC_SUBST(out_file)
3769 AC_SUBST(out_object_file)
3770 AC_SUBST(thread_file)
3771 AC_SUBST(tm_file_list)
3772 AC_SUBST(tm_include_list)
3773 AC_SUBST(tm_defines)
3774 AC_SUBST(tm_p_file_list)
3775 AC_SUBST(tm_p_include_list)
3776 AC_SUBST(xm_file_list)
3777 AC_SUBST(xm_include_list)
3778 AC_SUBST(xm_defines)
3779 AC_SUBST(c_target_objs)
3780 AC_SUBST(cxx_target_objs)
3781 AC_SUBST(target_cpu_default)
3782
3783 AC_SUBST_FILE(language_hooks)
3784
3785 # Echo link setup.
3786 if test x${build} = x${host} ; then
3787   if test x${host} = x${target} ; then
3788     echo "Links are now set up to build a native compiler for ${target}." 1>&2
3789   else
3790     echo "Links are now set up to build a cross-compiler" 1>&2
3791     echo " from ${host} to ${target}." 1>&2
3792   fi
3793 else
3794   if test x${host} = x${target} ; then
3795     echo "Links are now set up to build (on ${build}) a native compiler" 1>&2
3796     echo " for ${target}." 1>&2
3797   else
3798     echo "Links are now set up to build (on ${build}) a cross-compiler" 1>&2
3799     echo " from ${host} to ${target}." 1>&2
3800   fi
3801 fi
3802
3803 AC_ARG_VAR(GMPLIBS,[How to link GMP])
3804 AC_ARG_VAR(GMPINC,[How to find GMP include files])
3805
3806 # Configure the subdirectories
3807 # AC_CONFIG_SUBDIRS($subdirs)
3808
3809 # Create the Makefile
3810 # and configure language subdirectories
3811 AC_CONFIG_FILES($all_outputs)
3812
3813 AC_CONFIG_COMMANDS([default],
3814 [
3815 case ${CONFIG_HEADERS} in
3816   *auto-host.h:config.in*)
3817   echo > cstamp-h ;;
3818 esac
3819 # Make sure all the subdirs exist.
3820 for d in $subdirs doc build
3821 do
3822     test -d $d || mkdir $d
3823 done
3824 ],
3825 [subdirs='$subdirs'])
3826 AC_OUTPUT