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, $default_osabi,
 239                    [Default OSABI code])
 240
 241 AC_PROG_CC
 242 AC_PROG_CXX
 243 AC_PROG_YACC
 244 AC_PROG_RANLIB
 245 AC_PROG_INSTALL
 246 AC_PROG_LN_S
 247
 248 AC_GNU_SOURCE
 249
 250 ZW_GNU_GETTEXT_SISTER_DIR
 251 AM_PO_SUBDIRS
 252
 253 AC_C_BIGENDIAN
 254
 255 AC_EXEEXT
 256
 257 AM_CONDITIONAL(NATIVE_LINKER,
 258   test "x$target_alias" = "x" -o "x$host_alias" = "x$target_alias")
 259 AM_CONDITIONAL(GCC, test "$GCC" = yes)
 260
 261 AM_CONDITIONAL(NATIVE_OR_CROSS_LINKER,
 262   test "x$target_alias" = "x" -o "x$host_alias" = "x$target_alias" -o "x$host_alias" = "x$build_alias")
 263
 264 dnl Test for whether static linking is supported.  Some systems do not
 265 dnl install static libraries.  This only affects the set of tests that
 266 dnl we run.
 267 AC_CACHE_CHECK([whether static linking works], [gold_cv_lib_static],
 268 [LDFLAGS_hold=$LDFLAGS
 269 LDFLAGS="$LDFLAGS -static"
 270 AC_LINK_IFELSE([
 271 AC_LANG_PROGRAM([[void f() { }]])],
 272 [gold_cv_lib_static=yes], [gold_cv_lib_static=no])
 273 LDFLAGS=$LDFLAGS_hold])
 274 AM_CONDITIONAL(HAVE_STATIC, test "$gold_cv_lib_static" = "yes")
 275
 276 dnl Some architectures do not support taking pointers of functions
 277 dnl defined in shared libraries except in -fPIC mode.  We need to
 278 dnl tell the unittest framework if we're compiling for one of those
 279 dnl targets, so it doesn't try to run the tests that do that.
 280 AM_CONDITIONAL(FN_PTRS_IN_SO_WITHOUT_PIC, [
 281   case $target_cpu in
 282     i?86) true;;
 283     x86_64) false;;
 284     sparc64) false;;
 285     *) true;;
 286   esac])
 287
 288 dnl Test for gcc 4.1 or later.  Full support for -mcmodel=medium is
 289 dnl only available in gcc 4.1.
 290 AC_CACHE_CHECK([for gcc >= 4.1], [gold_cv_prog_gcc41],
 291 [AC_COMPILE_IFELSE([
 292 #if !defined __GNUC__
 293 error
 294 #elif __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 1)
 295 error
 296 #endif
 297 ], [gold_cv_prog_gcc41=yes], [gold_cv_prog_gcc41=no])])
 298
 299 dnl Whether we can test -mcmodel=medium.
 300 AM_CONDITIONAL(MCMODEL_MEDIUM,
 301 [test "$target_cpu" = "x86_64" -a "$gold_cv_prog_gcc41" = "yes"])
 302
 303 dnl Test for __thread support.
 304 AC_CACHE_CHECK([for thread support], [gold_cv_c_thread],
 305 [AC_COMPILE_IFELSE([__thread int i = 1;],
 306 [gold_cv_c_thread=yes], [gold_cv_c_thread=no])])
 307
 308 AM_CONDITIONAL(TLS, test "$gold_cv_c_thread" = "yes")
 309
 310 dnl On GNU/Linux TLS in static programs only works when using glibc
 311 dnl 2.4 or later.
 312 AC_CACHE_CHECK([for glibc >= 2.4], [gold_cv_lib_glibc24],
 313 [AC_COMPILE_IFELSE([
 314 #include <features.h>
 315 #if !defined __GLIBC__
 316 error
 317 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 4)
 318 error
 319 #endif
 320 ], [gold_cv_lib_glibc24=yes], [gold_cv_lib_glibc24=no])])
 321
 322 AM_CONDITIONAL(STATIC_TLS, test "$gold_cv_lib_glibc24" = "yes")
 323
 324 dnl Test for #pragma omp threadprivate
 325 AC_CACHE_CHECK([for omp support], [gold_cv_c_threadprivate],
 326 [save_CFLAGS="$CFLAGS"
 327 CFLAGS="$CFLAGS -fopenmp"
 328 AC_COMPILE_IFELSE([
 329 #include <omp.h>
 330 int i;
 331 #pragma omp threadprivate (i)
 332 ], [gold_cv_c_threadprivate=yes], [gold_cv_c_threadprivate=no])
 333 CFLAGS="$save_CFLAGS"])
 334 if test "$gold_cv_c_threadprivate" = "yes"; then
 335   AC_DEFINE(HAVE_OMP_SUPPORT, 1,
 336             [Define if compiler supports #pragma omp threadprivate])
 337 fi
 338 AM_CONDITIONAL(OMP_SUPPORT, test "$gold_cv_c_threadprivate" = "yes")
 339
 340 dnl Test for the -ftls-dialect=gnu2 option.
 341 save_CFLAGS="$CFLAGS"
 342 CFLAGS="$CFLAGS -mtls-dialect=gnu2"
 343 AC_COMPILE_IFELSE([int i;], [have_tls_gnu2=yes], [have_tls_gnu2=no])
 344 CFLAGS="$save_CFLAGS"
 345 AM_CONDITIONAL(TLS_GNU2_DIALECT, test "$have_tls_gnu2" = "yes")
 346
 347 dnl On GNU/Linux TLS descriptors are supported by the dynamic loader
 348 dnl only with glibc 2.9 or later.
 349 AC_CACHE_CHECK([for glibc >= 2.9], [gold_cv_lib_glibc29],
 350 [AC_COMPILE_IFELSE([
 351 #include <features.h>
 352 #if !defined __GLIBC__
 353 error
 354 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 9)
 355 error
 356 #endif
 357 ], [gold_cv_lib_glibc29=yes], [gold_cv_lib_glibc29=no])])
 358
 359 AM_CONDITIONAL(TLS_DESCRIPTORS, test "$gold_cv_lib_glibc29" = "yes")
 360
 361 dnl Test for the -frandom-seed option.
 362 AC_CACHE_CHECK([for -frandom-seed support], [gold_cv_c_random_seed],
 363 [save_CFLAGS="$CFLAGS"
 364 CFLAGS="$CFLAGS -frandom-seed=foo"
 365 AC_COMPILE_IFELSE([int i;], [gold_cv_c_random_seed=yes],
 366 [gold_cv_c_random_seed=no])
 367 CFLAGS="$save_CFLAGS"])
 368 if test "$gold_cv_c_random_seed" = "yes"; then
 369   # In Makefile, '$@' will be expanded to be the name of the file
 370   # being built, providing a unique seed for each file.
 371   RANDOM_SEED_CFLAGS=-frandom-seed=\$@
 372 fi
 373 AC_SUBST(RANDOM_SEED_CFLAGS)
 374
 375 dnl On GNU/Linux ifunc is supported by the dynamic linker in glibc
 376 dnl 2.11 or later, and by binutils 2.20.1 or later.
 377 AC_CACHE_CHECK([for glibc >= 2.11], [gold_cv_lib_glibc2_11],
 378 [AC_COMPILE_IFELSE([
 379 #include <features.h>
 380 #if !defined __GLIBC__
 381 error
 382 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 11)
 383 error
 384 #endif
 385 __asm__(".type foo, %gnu_indirect_function");
 386 ], [gold_cv_lib_glibc2_11=yes], [gold_cv_lib_glibc2_11=no])])
 387
 388 AM_CONDITIONAL(IFUNC, test "$gold_cv_lib_glibc2_11" = "yes")
 389
 390 AM_BINUTILS_WARNINGS
 391
 392 WARN_CXXFLAGS=`echo ${WARN_CFLAGS} | sed -e 's/-Wstrict-prototypes//' -e 's/-Wmissing-prototypes//' -e 's/-Wshadow//'`
 393 AC_SUBST(WARN_CXXFLAGS)
 394
 395 dnl Force support for large files by default.  This may need to be
 396 dnl host dependent.  If build == host, we can check getconf LFS_CFLAGS.
 397 LFS_CFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
 398 AC_SUBST(LFS_CFLAGS)
 399
 400 AC_CHECK_HEADERS(sys/mman.h)
 401 AC_CHECK_FUNCS(chsize mmap)
 402 AC_REPLACE_FUNCS(pread ftruncate ffsll)
 403
 404 AC_CACHE_CHECK([mremap with MREMAP_MAYMOVE], [gold_cv_lib_mremap_maymove],
 405 [AC_LINK_IFELSE([
 406 AC_LANG_PROGRAM([[
 407 #include <sys/mman.h>
 408 void f() { mremap (0, 0, 0, MREMAP_MAYMOVE); }
 409 ]])], [gold_cv_lib_mremap_maymove=yes], [gold_cv_lib_mremap_maymove=no])])
 410 if test "$gold_cv_lib_mremap_maymove" = "yes"; then
 411   AC_DEFINE(HAVE_MREMAP, 1,
 412     [Define to 1 if you have the mremap function with MREMAP_MAYMOVE support])
 413 else
 414   AC_LIBOBJ(mremap)
 415 fi
 416
 417 # Link in zlib if we can.  This allows us to write compressed sections.
 418 AC_SEARCH_LIBS(zlibVersion, z, [AC_CHECK_HEADERS(zlib.h)])
 419 AM_CONDITIONAL(HAVE_ZLIB, test "$ac_cv_search_zlibVersion" != "no")
 420
 421 dnl We have to check these in C, not C++, because autoconf generates
 422 dnl tests which have no type information, and current glibc provides
 423 dnl multiple declarations of functions like basename when compiling
 424 dnl with C++.
 425 AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp])
 426
 427 AC_LANG_PUSH(C++)
 428
 429 AC_CHECK_HEADERS(tr1/unordered_set tr1/unordered_map)
 430 AC_CHECK_HEADERS(ext/hash_map ext/hash_set)
 431 AC_CHECK_HEADERS(byteswap.h)
 432 AC_CHECK_FUNCS(mallinfo posix_fallocate readv sysconf times)
 433 AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp, strndup, memmem])
 434
 435 # Use of ::std::tr1::unordered_map::rehash causes undefined symbols
 436 # at link time with some versions of GCC.
 437 AC_CACHE_CHECK([whether ::std::tr1::unordered_map::rehash is usable.],
 438 [gold_cv_unordered_map_rehash],
 439 [AC_LINK_IFELSE([AC_LANG_PROGRAM([[
 440 #include <tr1/unordered_map>
 441 void bar() { ::std::tr1::unordered_map<int, int> x; x.rehash(10); }
 442 ]])], [gold_cv_unordered_map_rehash=yes], [gold_cv_unordered_map_rehash=no])])
 443 if test "$gold_cv_unordered_map_rehash" = "yes"; then
 444   AC_DEFINE(HAVE_TR1_UNORDERED_MAP_REHASH, 1,
 445             [Define if ::std::tr1::unordered_map::rehash is usable])
 446 fi
 447
 448 # gcc 4.3.0 doesn't recognize the printf attribute on a template
 449 # function.  Check for that.  This is gcc bug 35546.  This test can
 450 # probably be removed after the bug has been fixed for a while.
 451 AC_CACHE_CHECK([whether we can use attributes with template functions],
 452 [gold_cv_template_attribute],
 453 [AC_COMPILE_IFELSE([
 454 template<typename T> extern void foo(const char*, ...)
 455   __attribute__ ((__format__ (__printf__, 1, 2)));
 456 template<typename T> void foo(const char* format, ...) {}
 457 void bar() { foo<int>("%s\n", "foo"); }
 458 ], [gold_cv_template_attribute=yes], [gold_cv_template_attribute=no])])
 459 if test "$gold_cv_template_attribute" = "yes"; then
 460   AC_DEFINE(HAVE_TEMPLATE_ATTRIBUTES, 1,
 461             [Define if attributes work on C++ templates])
 462 fi
 463
 464 dnl Check if the system has struct stat::st_mtim.
 465 AC_CACHE_CHECK([for struct stat::st_mtim.],
 466 [gold_cv_stat_st_mtim],
 467 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 468 #include <sys/stat.h>
 469 long bar() { struct stat s; return (long)(s.st_mtim.tv_sec + s.st_mtim.tv_sec);}
 470 ]])], [gold_cv_stat_st_mtim=yes], [gold_cv_stat_st_mtim=no])])
 471 if test "$gold_cv_stat_st_mtim" = "yes"; then
 472   AC_DEFINE(HAVE_STAT_ST_MTIM, 1,
 473             [Define if struct stat has a field st_mtim with timespec for mtime])
 474 fi
 475
 476 AC_LANG_POP(C++)
 477
 478 AM_MAINTAINER_MODE
 479
 480 AC_OUTPUT(Makefile testsuite/Makefile po/Makefile.in:po/Make-in)