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 Some architectures do not support taking pointers of functions
 265 dnl defined in shared libraries except in -fPIC mode.  We need to
 266 dnl tell the unittest framework if we're compiling for one of those
 267 dnl targets, so it doesn't try to run the tests that do that.
 268 AM_CONDITIONAL(FN_PTRS_IN_SO_WITHOUT_PIC, [
 269   case $target_cpu in
 270     i?86) true;;
 271     x86_64) false;;
 272     sparc64) false;;
 273     *) true;;
 274   esac])
 275
 276 dnl Test for gcc 4.1 or later.  Full support for -mcmodel=medium is
 277 dnl only available in gcc 4.1.
 278 AC_CACHE_CHECK([for gcc >= 4.1], [gold_cv_prog_gcc41],
 279 [AC_COMPILE_IFELSE([
 280 #if !defined __GNUC__
 281 error
 282 #elif __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 1)
 283 error
 284 #endif
 285 ], [gold_cv_prog_gcc41=yes], [gold_cv_prog_gcc41=no])])
 286
 287 dnl Whether we can test -mcmodel=medium.
 288 AM_CONDITIONAL(MCMODEL_MEDIUM,
 289 [test "$target_cpu" = "x86_64" -a "$gold_cv_prog_gcc41" = "yes"])
 290
 291 dnl Test for __thread support.
 292 AC_CACHE_CHECK([for thread support], [gold_cv_c_thread],
 293 [AC_COMPILE_IFELSE([__thread int i = 1;],
 294 [gold_cv_c_thread=yes], [gold_cv_c_thread=no])])
 295
 296 AM_CONDITIONAL(TLS, test "$gold_cv_c_thread" = "yes")
 297
 298 dnl On GNU/Linux TLS in static programs only works when using glibc
 299 dnl 2.4 or later.
 300 AC_CACHE_CHECK([for glibc >= 2.4], [gold_cv_lib_glibc24],
 301 [AC_COMPILE_IFELSE([
 302 #include <features.h>
 303 #if !defined __GLIBC__
 304 error
 305 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 4)
 306 error
 307 #endif
 308 ], [gold_cv_lib_glibc24=yes], [gold_cv_lib_glibc24=no])])
 309
 310 AM_CONDITIONAL(STATIC_TLS, test "$gold_cv_lib_glibc24" = "yes")
 311
 312 dnl Test for #pragma omp threadprivate
 313 AC_CACHE_CHECK([for omp support], [gold_cv_c_threadprivate],
 314 [save_CFLAGS="$CFLAGS"
 315 CFLAGS="$CFLAGS -fopenmp"
 316 AC_COMPILE_IFELSE([
 317 #include <omp.h>
 318 int i;
 319 #pragma omp threadprivate (i)
 320 ], [gold_cv_c_threadprivate=yes], [gold_cv_c_threadprivate=no])
 321 CFLAGS="$save_CFLAGS"])
 322 if test "$gold_cv_c_threadprivate" = "yes"; then
 323   AC_DEFINE(HAVE_OMP_SUPPORT, 1,
 324             [Define if compiler supports #pragma omp threadprivate])
 325 fi
 326 AM_CONDITIONAL(OMP_SUPPORT, test "$gold_cv_c_threadprivate" = "yes")
 327
 328 dnl Test for the -ftls-dialect=gnu2 option.
 329 save_CFLAGS="$CFLAGS"
 330 CFLAGS="$CFLAGS -mtls-dialect=gnu2"
 331 AC_COMPILE_IFELSE([int i;], [have_tls_gnu2=yes], [have_tls_gnu2=no])
 332 CFLAGS="$save_CFLAGS"
 333 AM_CONDITIONAL(TLS_GNU2_DIALECT, test "$have_tls_gnu2" = "yes")
 334
 335 dnl On GNU/Linux TLS descriptors are supported by the dynamic loader
 336 dnl only with glibc 2.9 or later.
 337 AC_CACHE_CHECK([for glibc >= 2.9], [gold_cv_lib_glibc29],
 338 [AC_COMPILE_IFELSE([
 339 #include <features.h>
 340 #if !defined __GLIBC__
 341 error
 342 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 9)
 343 error
 344 #endif
 345 ], [gold_cv_lib_glibc29=yes], [gold_cv_lib_glibc29=no])])
 346
 347 AM_CONDITIONAL(TLS_DESCRIPTORS, test "$gold_cv_lib_glibc29" = "yes")
 348
 349 dnl Check whether the compiler supports constructor priorities in
 350 dnl attributes, which were added in gcc 4.3.
 351 AC_CACHE_CHECK([for constructor priorities], [gold_cv_c_conprio],
 352 [AC_COMPILE_IFELSE([void f() __attribute__ ((constructor (1)));],
 353 [gold_cv_c_conprio=yes], [gold_cv_c_conprio=no])])
 354
 355 AM_CONDITIONAL(CONSTRUCTOR_PRIORITY, test "$gold_cv_c_conprio" = "yes")
 356
 357 dnl Test for the -frandom-seed option.
 358 AC_CACHE_CHECK([for -frandom-seed support], [gold_cv_c_random_seed],
 359 [save_CFLAGS="$CFLAGS"
 360 CFLAGS="$CFLAGS -frandom-seed=foo"
 361 AC_COMPILE_IFELSE([int i;], [gold_cv_c_random_seed=yes],
 362 [gold_cv_c_random_seed=no])
 363 CFLAGS="$save_CFLAGS"])
 364 if test "$gold_cv_c_random_seed" = "yes"; then
 365   # In Makefile, '$@' will be expanded to be the name of the file
 366   # being built, providing a unique seed for each file.
 367   RANDOM_SEED_CFLAGS=-frandom-seed=\$@
 368 fi
 369 AC_SUBST(RANDOM_SEED_CFLAGS)
 370
 371 dnl On GNU/Linux ifunc is supported by the dynamic linker in glibc
 372 dnl 2.11 or later.
 373 AC_CACHE_CHECK([for glibc >= 2.11], [gold_cv_lib_glibc2_11],
 374 [AC_COMPILE_IFELSE([
 375 #include <features.h>
 376 #if !defined __GLIBC__
 377 error
 378 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 11)
 379 error
 380 #endif
 381 ], [gold_cv_lib_glibc2_11=yes], [gold_cv_lib_glibc2_11=no])])
 382
 383 AM_CONDITIONAL(IFUNC, test "$gold_cv_lib_glibc2_11" = "yes")
 384
 385 AM_BINUTILS_WARNINGS
 386
 387 WARN_CXXFLAGS=`echo ${WARN_CFLAGS} | sed -e 's/-Wstrict-prototypes//' -e 's/-Wmissing-prototypes//' -e 's/-Wshadow//'`
 388 AC_SUBST(WARN_CXXFLAGS)
 389
 390 dnl Force support for large files by default.  This may need to be
 391 dnl host dependent.  If build == host, we can check getconf LFS_CFLAGS.
 392 LFS_CFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
 393 AC_SUBST(LFS_CFLAGS)
 394
 395 AC_CHECK_FUNCS(chsize)
 396 AC_REPLACE_FUNCS(pread ftruncate mremap ffsll)
 397
 398 # Link in zlib if we can.  This allows us to write compressed sections.
 399 AC_SEARCH_LIBS(zlibVersion, z, [AC_CHECK_HEADERS(zlib.h)])
 400 AM_CONDITIONAL(HAVE_ZLIB, test "$ac_cv_search_zlibVersion" != "no")
 401
 402 dnl We have to check these in C, not C++, because autoconf generates
 403 dnl tests which have no type information, and current glibc provides
 404 dnl multiple declarations of functions like basename when compiling
 405 dnl with C++.
 406 AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp])
 407
 408 AC_LANG_PUSH(C++)
 409
 410 AC_CHECK_HEADERS(tr1/unordered_set tr1/unordered_map)
 411 AC_CHECK_HEADERS(ext/hash_map ext/hash_set)
 412 AC_CHECK_HEADERS(byteswap.h)
 413 AC_CHECK_FUNCS(mallinfo posix_fallocate readv sysconf times)
 414 AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp, strndup, memmem])
 415
 416 # Use of ::std::tr1::unordered_map::rehash causes undefined symbols
 417 # at link time with some versions of GCC.
 418 AC_CACHE_CHECK([whether ::std::tr1::unordered_map::rehash is usable.],
 419 [gold_cv_unordered_map_rehash],
 420 [AC_LINK_IFELSE([AC_LANG_PROGRAM([[
 421 #include <tr1/unordered_map>
 422 void bar() { ::std::tr1::unordered_map<int, int> x; x.rehash(10); }
 423 ]])], [gold_cv_unordered_map_rehash=yes], [gold_cv_unordered_map_rehash=no])])
 424 if test "$gold_cv_unordered_map_rehash" = "yes"; then
 425   AC_DEFINE(HAVE_TR1_UNORDERED_MAP_REHASH, 1,
 426             [Define if ::std::tr1::unordered_map::rehash is usable])
 427 fi
 428
 429 # gcc 4.3.0 doesn't recognize the printf attribute on a template
 430 # function.  Check for that.  This is gcc bug 35546.  This test can
 431 # probably be removed after the bug has been fixed for a while.
 432 AC_CACHE_CHECK([whether we can use attributes with template functions],
 433 [gold_cv_template_attribute],
 434 [AC_COMPILE_IFELSE([
 435 template<typename T> extern void foo(const char*, ...)
 436   __attribute__ ((__format__ (__printf__, 1, 2)));
 437 template<typename T> void foo(const char* format, ...) {}
 438 void bar() { foo<int>("%s\n", "foo"); }
 439 ], [gold_cv_template_attribute=yes], [gold_cv_template_attribute=no])])
 440 if test "$gold_cv_template_attribute" = "yes"; then
 441   AC_DEFINE(HAVE_TEMPLATE_ATTRIBUTES, 1,
 442             [Define if attributes work on C++ templates])
 443 fi
 444
 445 dnl Check if the system has struct stat::st_mtim.
 446 AC_CACHE_CHECK([for struct stat::st_mtim.],
 447 [gold_cv_stat_st_mtim],
 448 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 449 #include <sys/stat.h>
 450 long bar() { struct stat s; return (long)(s.st_mtim.tv_sec + s.st_mtim.tv_sec);}
 451 ]])], [gold_cv_stat_st_mtim=yes], [gold_cv_stat_st_mtim=no])])
 452 if test "$gold_cv_stat_st_mtim" = "yes"; then
 453   AC_DEFINE(HAVE_STAT_ST_MTIM, 1,
 454             [Define if struct stat has a field st_mtim with timespec for mtime])
 455 fi
 456
 457 AC_LANG_POP(C++)
 458
 459 AM_MAINTAINER_MODE
 460
 461 AC_OUTPUT(Makefile testsuite/Makefile po/Makefile.in:po/Make-in)