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