gold/configure.ac

   1 dnl Process this file with autoconf to produce a configure script.
   2
   3 AC_PREREQ(2.59)
   4
   5 AC_INIT(gold, 0.1)
   6 AC_CONFIG_SRCDIR(gold.cc)
   7
   8 AC_CANONICAL_TARGET
   9
  10 AM_INIT_AUTOMAKE([no-dist parallel-tests])
  11
  12 AM_CONFIG_HEADER(config.h:config.in)
  13
  14 AC_ARG_WITH(sysroot,
  15 [  --with-sysroot[=DIR]    search for usr/lib et al within DIR],
  16 [sysroot=$withval], [sysroot=no])
  17
  18 if test "$sysroot" = "yes"; then
  19   sysroot='${exec_prefix}/${target_alias}/sys-root'
  20 elif test "$sysroot" = "no"; then
  21   sysroot=
  22 fi
  23
  24 sysroot_relocatable=0
  25 if test -n "$sysroot"; then
  26   case "sysroot" in
  27     "${prefix}" | "${prefix}/"* | \
  28     "${exec_prefix}" | "${exec_prefix}/"* | \
  29     '${prefix}' | '${prefix}/'*| \
  30     '${exec_prefix}' | '${exec_prefix}/'*)
  31       sysroot_relocatable=1
  32       ;;
  33   esac
  34 fi
  35
  36 AC_DEFINE_UNQUOTED(TARGET_SYSTEM_ROOT, "$sysroot",
  37   [System root for target files])
  38 AC_DEFINE_UNQUOTED(TARGET_SYSTEM_ROOT_RELOCATABLE, $sysroot_relocatable,
  39   [Whether the system root can be relocated])
  40
  41 dnl "install_as_default" is true if the linker to be installed as the
  42 dnl default linker, ld.
  43 dnl "installed_linker" is the installed gold linker name.
  44
  45 default_ld=
  46 AC_ARG_ENABLE(ld,
  47 [[  --enable-ld[=ARG]     build ld [ARG={default,yes,no}]]],
  48 [case "${enableval}" in
  49   default)
  50     default_ld=ld.bfd
  51     ;;
  52 esac])
  53
  54 AC_ARG_ENABLE(gold,
  55 [[  --enable-gold[=ARG]     build gold [ARG={default,yes,no}]]],
  56 [case "${enableval}" in
  57  yes|default)
  58    if test x${default_ld} = x; then
  59      install_as_default=yes
  60    fi
  61    installed_linker=ld.gold
  62    ;;
  63  no)
  64    ;;
  65  *)
  66    AC_MSG_ERROR([invalid --enable-gold argument])
  67    ;;
  68  esac],
  69 [install_as_default=no
  70  installed_linker=ld.gold])
  71 AC_SUBST(install_as_default)
  72 AC_SUBST(installed_linker)
  73
  74 dnl For now threads are a configure time option.
  75 AC_ARG_ENABLE([threads],
  76 [  --enable-threads        multi-threaded linking],
  77 [case "${enableval}" in
  78   yes | "") threads=yes ;;
  79   no) threads=no ;;
  80   *) threads=yes ;;
  81  esac],
  82 [threads=no])
  83 if test "$threads" = "yes"; then
  84   AC_DEFINE(ENABLE_THREADS, 1,
  85             [Define to do multi-threaded linking])
  86 fi
  87 AM_CONDITIONAL(THREADS, test "$threads" = "yes")
  88
  89 AC_ARG_ENABLE([plugins],
  90 [  --enable-plugins        linker plugins],
  91 [case "${enableval}" in
  92   yes | "") plugins=yes ;;
  93   no) plugins=no ;;
  94   *) plugins=yes ;;
  95  esac],
  96 [plugins=no])
  97 if test "$plugins" = "yes"; then
  98   AC_DEFINE(ENABLE_PLUGINS, 1,
  99             [Define to enable linker plugins])
 100 fi
 101 AM_CONDITIONAL(PLUGINS, test "$plugins" = "yes")
 102
 103 AC_ARG_ENABLE([targets],
 104 [  --enable-targets        alternative target configurations],
 105 [case "${enableval}" in
 106   yes | "")
 107     AC_MSG_ERROR([--enable-targets option must specify target names or 'all'])
 108     ;;
 109   no)
 110     enable_targets=
 111     ;;
 112   *)
 113     enable_targets=$enableval
 114     ;;
 115 esac],
 116 [# For now, enable all targets by default
 117  enable_targets=all
 118 ])
 119
 120 # Canonicalize the enabled targets.
 121 if test -n "$enable_targets"; then
 122   for targ in `echo $enable_targets | sed -e 's/,/ /g'`; do
 123     result=`$ac_config_sub $targ 2>/dev/null`
 124     if test -n "$result"; then
 125       canon_targets="$canon_targets $result"
 126     else
 127       # Permit unrecognized target names, like "all".
 128       canon_targets="$canon_targets $targ"
 129     fi
 130   done
 131 fi
 132
 133 # See which specific instantiations we need.
 134 targetobjs=
 135 all_targets=
 136 default_machine=
 137 default_size=
 138 default_big_endian=
 139 default_osabi=ELFOSABI_NONE
 140 targ_32_little=
 141 targ_32_big=
 142 targ_64_little=
 143 targ_64_big=
 144 for targ in $target $canon_targets; do
 145   if test "$targ" = "all"; then
 146     targ_32_little=yes
 147     targ_32_big=yes
 148     targ_64_little=yes
 149     targ_64_big=yes
 150     all_targets=yes
 151   else
 152     . ${srcdir}/configure.tgt
 153
 154     if test "$targ_obj" = "UNKNOWN"; then
 155       AC_MSG_ERROR("unsupported target $targ")
 156     else
 157       targetobjs="$targetobjs ${targ_obj}.\$(OBJEXT)"
 158       if test "$targ_extra_obj" != ""; then
 159         targetobjs="$targetobjs ${targ_extra_obj}.\$(OBJEXT)"
 160       fi
 161       if test "$targ_size" = "32" -o "$targ_extra_size" = "32"; then
 162           if test "$targ_big_endian" = "true" \
 163               -o "$targ_extra_big_endian" = "true"; then
 164               targ_32_big=yes
 165           fi
 166           if test "$targ_big_endian" = "false" \
 167               -o "$targ_extra_big_endian" = "false"; then
 168               targ_32_little=yes
 169           fi
 170       fi
 171       if test "$targ_size" = "64" -o "$targ_extra_size" = "64"; then
 172           if test "$targ_big_endian" = "true" \
 173               -o "$targ_extra_big_endian" = "true"; then
 174               targ_64_big=yes
 175           fi
 176           if test "$targ_big_endian" = "false" \
 177               -o "$targ_extra_big_endian" = "false"; then
 178               targ_64_little=yes
 179           fi
 180       fi
 181
 182       if test "$target" = "$targ"; then
 183         default_machine=$targ_machine
 184         default_size=$targ_size
 185         default_big_endian=$targ_big_endian
 186         default_osabi=$targ_osabi
 187
 188         AM_CONDITIONAL(DEFAULT_TARGET_ARM, test "$targ_obj" = "arm")
 189         AM_CONDITIONAL(DEFAULT_TARGET_I386, test "$targ_obj" = "i386")
 190         AM_CONDITIONAL(DEFAULT_TARGET_POWERPC, test "$targ_obj" = "powerpc")
 191         AM_CONDITIONAL(DEFAULT_TARGET_SPARC, test "$targ_obj" = "sparc")
 192         AM_CONDITIONAL(DEFAULT_TARGET_X86_64, test "$targ_obj" = "x86_64")
 193       fi
 194     fi
 195   fi
 196 done
 197
 198 # Remove any duplicates.
 199 to=""
 200 for t in $targetobjs; do
 201   case " $to " in
 202   *" $t "*) ;;
 203   *) to="$to $t" ;;
 204   esac
 205 done
 206 targetobjs=$to
 207
 208 if test -n "$targ_32_little"; then
 209   AC_DEFINE(HAVE_TARGET_32_LITTLE, 1,
 210               [Define to support 32-bit little-endian targets])
 211 fi
 212 if test -n "$targ_32_big"; then
 213   AC_DEFINE(HAVE_TARGET_32_BIG, 1,
 214               [Define to support 32-bit big-endian targets])
 215 fi
 216 if test -n "$targ_64_little"; then
 217   AC_DEFINE(HAVE_TARGET_64_LITTLE, 1,
 218               [Define to support 64-bit little-endian targets])
 219 fi
 220 if test -n "$targ_64_big"; then
 221   AC_DEFINE(HAVE_TARGET_64_BIG, 1,
 222               [Define to support 64-bit big-endian targets])
 223 fi
 224
 225 if test -n "$all_targets"; then
 226   TARGETOBJS='$(ALL_TARGETOBJS)'
 227 else
 228   TARGETOBJS="$targetobjs"
 229 fi
 230 AC_SUBST(TARGETOBJS)
 231
 232 AC_DEFINE_UNQUOTED(GOLD_DEFAULT_MACHINE, $default_machine,
 233                    [Default machine code])
 234 AC_DEFINE_UNQUOTED(GOLD_DEFAULT_SIZE, $default_size,
 235                    [Default size (32 or 64)])
 236 AC_DEFINE_UNQUOTED(GOLD_DEFAULT_BIG_ENDIAN, $default_big_endian,
 237                    [Default big endian (true or false)])
 238 AC_DEFINE_UNQUOTED(GOLD_DEFAULT_OSABI, $default_osabi,
 239                    [Default OSABI code])
 240
 241 AC_ARG_WITH(lib-path,
 242 [  --with-lib-path=dir1:dir2...  set default LIB_PATH],
 243 [case "$withval" in
 244  yes) LIB_PATH='"/lib:/usr/lib"' ;;
 245  no) LIB_PATH='""' ;;
 246  *) LIB_PATH='"'"$withval"'"' ;;
 247  esac],
 248 [LIB_PATH='"::DEFAULT::"'])
 249 AC_DEFINE_UNQUOTED(LIB_PATH, $LIB_PATH,
 250                    [Default library search path])
 251 if test "x$target_alias" = "x" -o "x$host_alias" = "x$target_alias"; then
 252   AC_DEFINE(NATIVE_LINKER, 1, [Whether configured as a native linker])
 253 fi
 254
 255 AC_CHECK_TOOL(NM, nm)
 256
 257 AC_PROG_CC
 258 AC_PROG_CXX
 259 AC_PROG_YACC
 260 AC_PROG_RANLIB
 261 AC_PROG_INSTALL
 262 AC_PROG_LN_S
 263
 264 AC_GNU_SOURCE
 265
 266 ZW_GNU_GETTEXT_SISTER_DIR
 267 AM_PO_SUBDIRS
 268
 269 AC_C_BIGENDIAN
 270
 271 AC_EXEEXT
 272
 273 AM_CONDITIONAL(NATIVE_LINKER,
 274   test "x$target_alias" = "x" -o "x$host_alias" = "x$target_alias")
 275 AM_CONDITIONAL(GCC, test "$GCC" = yes)
 276
 277 AM_CONDITIONAL(NATIVE_OR_CROSS_LINKER,
 278   test "x$target_alias" = "x" -o "x$host_alias" = "x$target_alias" -o "x$host_alias" = "x$build_alias")
 279
 280 dnl Test for whether static linking is supported.  Some systems do not
 281 dnl install static libraries.  This only affects the set of tests that
 282 dnl we run.
 283 AC_CACHE_CHECK([whether static linking works], [gold_cv_lib_static],
 284 [LDFLAGS_hold=$LDFLAGS
 285 LDFLAGS="$LDFLAGS -static"
 286 AC_LINK_IFELSE([
 287 AC_LANG_PROGRAM([[void f() { }]])],
 288 [gold_cv_lib_static=yes], [gold_cv_lib_static=no])
 289 LDFLAGS=$LDFLAGS_hold])
 290 AM_CONDITIONAL(HAVE_STATIC, test "$gold_cv_lib_static" = "yes")
 291
 292 dnl Some architectures do not support taking pointers of functions
 293 dnl defined in shared libraries except in -fPIC mode.  We need to
 294 dnl tell the unittest framework if we're compiling for one of those
 295 dnl targets, so it doesn't try to run the tests that do that.
 296 AM_CONDITIONAL(FN_PTRS_IN_SO_WITHOUT_PIC, [
 297   case $target_cpu in
 298     i?86) true;;
 299     x86_64) false;;
 300     sparc64) false;;
 301     *) true;;
 302   esac])
 303
 304 dnl Test for gcc 4.1 or later.  Full support for -mcmodel=medium is
 305 dnl only available in gcc 4.1.
 306 AC_CACHE_CHECK([for gcc >= 4.1], [gold_cv_prog_gcc41],
 307 [AC_COMPILE_IFELSE([
 308 #if !defined __GNUC__
 309 error
 310 #elif __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 1)
 311 error
 312 #endif
 313 ], [gold_cv_prog_gcc41=yes], [gold_cv_prog_gcc41=no])])
 314
 315 save_CFLAGS="$CFLAGS"
 316 CFLAGS="$CFLAGS -mcmodel=medium"
 317 AC_COMPILE_IFELSE([int i;], [have_mcmodel_medium=yes], [have_mcmodel_medium=no])
 318 CFLAGS="$save_CFLAGS"
 319 dnl Whether we can test -mcmodel=medium.
 320 AM_CONDITIONAL(MCMODEL_MEDIUM,
 321 [test "$target_cpu" = "x86_64" -a "$have_mcmodel_medium" = "yes" -a "$gold_cv_prog_gcc41" = "yes"])
 322
 323 dnl Test for __thread support.
 324 AC_CACHE_CHECK([for thread support], [gold_cv_c_thread],
 325 [AC_COMPILE_IFELSE([__thread int i = 1;],
 326 [gold_cv_c_thread=yes], [gold_cv_c_thread=no])])
 327
 328 AM_CONDITIONAL(TLS, test "$gold_cv_c_thread" = "yes")
 329
 330 dnl On GNU/Linux TLS in static programs only works when using glibc
 331 dnl 2.4 or later.
 332 AC_CACHE_CHECK([for glibc >= 2.4], [gold_cv_lib_glibc24],
 333 [AC_COMPILE_IFELSE([
 334 #include <features.h>
 335 #if !defined __GLIBC__
 336 error
 337 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 4)
 338 error
 339 #endif
 340 ], [gold_cv_lib_glibc24=yes], [gold_cv_lib_glibc24=no])])
 341
 342 AM_CONDITIONAL(STATIC_TLS, test "$gold_cv_lib_glibc24" = "yes")
 343
 344 dnl Test for #pragma omp threadprivate
 345 AC_CACHE_CHECK([for omp support], [gold_cv_c_threadprivate],
 346 [save_CFLAGS="$CFLAGS"
 347 CFLAGS="$CFLAGS -fopenmp"
 348 AC_COMPILE_IFELSE([
 349 #include <omp.h>
 350 int i;
 351 #pragma omp threadprivate (i)
 352 ], [gold_cv_c_threadprivate=yes], [gold_cv_c_threadprivate=no])
 353 CFLAGS="$save_CFLAGS"])
 354 if test "$gold_cv_c_threadprivate" = "yes"; then
 355   AC_DEFINE(HAVE_OMP_SUPPORT, 1,
 356             [Define if compiler supports #pragma omp threadprivate])
 357 fi
 358 AM_CONDITIONAL(OMP_SUPPORT, test "$gold_cv_c_threadprivate" = "yes")
 359
 360 dnl Test for the -ftls-dialect=gnu2 option.
 361 save_CFLAGS="$CFLAGS"
 362 CFLAGS="$CFLAGS -mtls-dialect=gnu2"
 363 AC_COMPILE_IFELSE([int i;], [have_tls_gnu2=yes], [have_tls_gnu2=no])
 364 CFLAGS="$save_CFLAGS"
 365 AM_CONDITIONAL(TLS_GNU2_DIALECT, test "$have_tls_gnu2" = "yes")
 366
 367 dnl On GNU/Linux TLS descriptors are supported by the dynamic loader
 368 dnl only with glibc 2.9 or later.
 369 AC_CACHE_CHECK([for glibc >= 2.9], [gold_cv_lib_glibc29],
 370 [AC_COMPILE_IFELSE([
 371 #include <features.h>
 372 #if !defined __GLIBC__
 373 error
 374 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 9)
 375 error
 376 #endif
 377 ], [gold_cv_lib_glibc29=yes], [gold_cv_lib_glibc29=no])])
 378
 379 AM_CONDITIONAL(TLS_DESCRIPTORS, test "$gold_cv_lib_glibc29" = "yes")
 380
 381 dnl Test for the -frandom-seed option.
 382 AC_CACHE_CHECK([for -frandom-seed support], [gold_cv_c_random_seed],
 383 [save_CFLAGS="$CFLAGS"
 384 CFLAGS="$CFLAGS -frandom-seed=foo"
 385 AC_COMPILE_IFELSE([int i;], [gold_cv_c_random_seed=yes],
 386 [gold_cv_c_random_seed=no])
 387 CFLAGS="$save_CFLAGS"])
 388 if test "$gold_cv_c_random_seed" = "yes"; then
 389   # In Makefile, '$@' will be expanded to be the name of the file
 390   # being built, providing a unique seed for each file.
 391   RANDOM_SEED_CFLAGS=-frandom-seed=\$@
 392 fi
 393 AC_SUBST(RANDOM_SEED_CFLAGS)
 394
 395 dnl On GNU/Linux ifunc is supported by the dynamic linker in glibc
 396 dnl 2.11 or later, and by binutils 2.20.1 or later.
 397 AC_CACHE_CHECK([for glibc ifunc support], [gold_cv_lib_glibc_ifunc],
 398 [save_LDFLAGS="$LDFLAGS"
 399 LDFLAGS="$LDFLAGS -static"
 400 AC_LINK_IFELSE([AC_LANG_PROGRAM([[
 401 #include <features.h>
 402 #if !defined __GLIBC__
 403 error
 404 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 11)
 405 error
 406 #endif
 407 void func (void) { }
 408 void invoke (void);
 409 __asm__(".type invoke, %gnu_indirect_function");
 410 typedef void (*funcptr) (void);
 411 funcptr dispatch (void) __asm__ ("invoke");
 412 funcptr dispatch (void) { return &func; }]],
 413 [[invoke();]])
 414 ], [
 415 if ${NM} conftest$EXEEXT | grep "__rela\?_iplt_start" >/dev/null 2>&1; then
 416   gold_cv_lib_glibc_ifunc=both
 417 else
 418   gold_cv_lib_glibc_ifunc=dyn
 419 fi], [gold_cv_lib_glibc_ifunc=no])
 420 LDFLAGS="$save_LDFLAGS"])
 421
 422 AM_CONDITIONAL(IFUNC, test "$gold_cv_lib_glibc_ifunc" != "no")
 423 AM_CONDITIONAL(IFUNC_STATIC, test "$gold_cv_lib_glibc_ifunc" = "both")
 424
 425 AM_BINUTILS_WARNINGS
 426
 427 WARN_CXXFLAGS=`echo ${WARN_CFLAGS} | sed -e 's/-Wstrict-prototypes//' -e 's/-Wmissing-prototypes//' -e 's/-Wshadow//'`
 428 AC_SUBST(WARN_CXXFLAGS)
 429
 430 AC_ARG_WITH(gold-ldflags,
 431 [  --with-gold-ldflags=FLAGS  additional link flags for gold],
 432 [if test "$withval" = "no" -o "$withval" = "yes"; then
 433    GOLD_LDFLAGS=
 434  else
 435    GOLD_LDFLAGS=$withval
 436  fi],
 437 [GOLD_LDFLAGS=])
 438 AC_SUBST(GOLD_LDFLAGS)
 439
 440 AC_ARG_WITH(gold-ldadd,
 441 [  --with-gold-ldadd=LIBS     additional libraries for gold],
 442 [if test "$withval" = "no" -o "$withval" = "yes"; then
 443    GOLD_LDADD=
 444  else
 445    GOLD_LDADD=$withval
 446  fi],
 447 [GOLD_LDADD=])
 448 AC_SUBST(GOLD_LDADD)
 449
 450 dnl Force support for large files by default.  This may need to be
 451 dnl host dependent.  If build == host, we can check getconf LFS_CFLAGS.
 452 LFS_CFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
 453 AC_SUBST(LFS_CFLAGS)
 454
 455 AC_CHECK_HEADERS(sys/mman.h)
 456 AC_CHECK_FUNCS(chsize mmap)
 457 AC_REPLACE_FUNCS(pread ftruncate ffsll)
 458
 459 AC_CACHE_CHECK([mremap with MREMAP_MAYMOVE], [gold_cv_lib_mremap_maymove],
 460 [AC_LINK_IFELSE([
 461 AC_LANG_PROGRAM([[
 462 #include <sys/mman.h>
 463 void f() { mremap (0, 0, 0, MREMAP_MAYMOVE); }
 464 ]])], [gold_cv_lib_mremap_maymove=yes], [gold_cv_lib_mremap_maymove=no])])
 465 if test "$gold_cv_lib_mremap_maymove" = "yes"; then
 466   AC_DEFINE(HAVE_MREMAP, 1,
 467     [Define to 1 if you have the mremap function with MREMAP_MAYMOVE support])
 468 else
 469   AC_LIBOBJ(mremap)
 470 fi
 471
 472 # Link in zlib if we can.  This allows us to write compressed sections.
 473 AC_SEARCH_LIBS(zlibVersion, z, [AC_CHECK_HEADERS(zlib.h)])
 474 AM_CONDITIONAL(HAVE_ZLIB, test "$ac_cv_search_zlibVersion" != "no")
 475
 476 dnl We have to check these in C, not C++, because autoconf generates
 477 dnl tests which have no type information, and current glibc provides
 478 dnl multiple declarations of functions like basename when compiling
 479 dnl with C++.
 480 AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp])
 481
 482 AC_LANG_PUSH(C++)
 483
 484 AC_CHECK_HEADERS(tr1/unordered_set tr1/unordered_map)
 485 AC_CHECK_HEADERS(ext/hash_map ext/hash_set)
 486 AC_CHECK_HEADERS(byteswap.h)
 487 AC_CHECK_FUNCS(mallinfo posix_fallocate readv sysconf times)
 488 AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp, strndup, memmem])
 489
 490 # Use of ::std::tr1::unordered_map::rehash causes undefined symbols
 491 # at link time with some versions of GCC.
 492 AC_CACHE_CHECK([whether ::std::tr1::unordered_map::rehash is usable.],
 493 [gold_cv_unordered_map_rehash],
 494 [AC_LINK_IFELSE([AC_LANG_PROGRAM([[
 495 #include <tr1/unordered_map>
 496 void bar() { ::std::tr1::unordered_map<int, int> x; x.rehash(10); }
 497 ]])], [gold_cv_unordered_map_rehash=yes], [gold_cv_unordered_map_rehash=no])])
 498 if test "$gold_cv_unordered_map_rehash" = "yes"; then
 499   AC_DEFINE(HAVE_TR1_UNORDERED_MAP_REHASH, 1,
 500             [Define if ::std::tr1::unordered_map::rehash is usable])
 501 fi
 502
 503 # gcc 4.3.0 doesn't recognize the printf attribute on a template
 504 # function.  Check for that.  This is gcc bug 35546.  This test can
 505 # probably be removed after the bug has been fixed for a while.
 506 AC_CACHE_CHECK([whether we can use attributes with template functions],
 507 [gold_cv_template_attribute],
 508 [AC_COMPILE_IFELSE([
 509 template<typename T> extern void foo(const char*, ...)
 510   __attribute__ ((__format__ (__printf__, 1, 2)));
 511 template<typename T> void foo(const char* format, ...) {}
 512 void bar() { foo<int>("%s\n", "foo"); }
 513 ], [gold_cv_template_attribute=yes], [gold_cv_template_attribute=no])])
 514 if test "$gold_cv_template_attribute" = "yes"; then
 515   AC_DEFINE(HAVE_TEMPLATE_ATTRIBUTES, 1,
 516             [Define if attributes work on C++ templates])
 517 fi
 518
 519 dnl Check if the system has struct stat::st_mtim.
 520 AC_CACHE_CHECK([for struct stat::st_mtim.],
 521 [gold_cv_stat_st_mtim],
 522 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 523 #include <sys/stat.h>
 524 long bar() { struct stat s; return (long)(s.st_mtim.tv_sec + s.st_mtim.tv_sec);}
 525 ]])], [gold_cv_stat_st_mtim=yes], [gold_cv_stat_st_mtim=no])])
 526 if test "$gold_cv_stat_st_mtim" = "yes"; then
 527   AC_DEFINE(HAVE_STAT_ST_MTIM, 1,
 528             [Define if struct stat has a field st_mtim with timespec for mtime])
 529 fi
 530
 531 AC_LANG_POP(C++)
 532
 533 AM_MAINTAINER_MODE
 534
 535 AC_OUTPUT(Makefile testsuite/Makefile po/Makefile.in:po/Make-in)