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
  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, $sysroot_relocatable,
  39   [Whether the system root can be relocated])
  40
  41 dnl For now threads are a configure time option.
  42 AC_ARG_ENABLE([threads],
  43 [  --enable-threads        multi-threaded linking],
  44 [case "${enableval}" in
  45   yes | "") threads=yes ;;
  46   no) threads=no ;;
  47   *) threads=yes ;;
  48  esac],
  49 [threads=no])
  50 if test "$threads" = "yes"; then
  51   AC_DEFINE(ENABLE_THREADS, 1,
  52             [Define to do multi-threaded linking])
  53 fi
  54 AM_CONDITIONAL(THREADS, test "$threads" = "yes")
  55
  56 AC_ARG_ENABLE([plugins],
  57 [  --enable-plugins        linker plugins],
  58 [case "${enableval}" in
  59   yes | "") plugins=yes ;;
  60   no) plugins=no ;;
  61   *) plugins=yes ;;
  62  esac],
  63 [plugins=no])
  64 if test "$plugins" = "yes"; then
  65   AC_DEFINE(ENABLE_PLUGINS, 1,
  66             [Define to enable linker plugins])
  67 fi
  68 AM_CONDITIONAL(PLUGINS, test "$plugins" = "yes")
  69
  70 AC_ARG_ENABLE([targets],
  71 [  --enable-targets        alternative target configurations],
  72 [case "${enableval}" in
  73   yes | "")
  74     AC_MSG_ERROR([--enable-targets option must specify target names or 'all'])
  75     ;;
  76   no)
  77     enable_targets=
  78     ;;
  79   *)
  80     enable_targets=$enableval
  81     ;;
  82 esac],
  83 [# For now, enable all targets by default
  84  enable_targets=all
  85 ])
  86
  87 # Canonicalize the enabled targets.
  88 if test -n "$enable_targets"; then
  89   for targ in `echo $enable_targets | sed -e 's/,/ /g'`; do
  90     result=`$ac_config_sub $targ 2>/dev/null`
  91     if test -n "$result"; then
  92       canon_targets="$canon_targets $result"
  93     else
  94       # Permit unrecognized target names, like "all".
  95       canon_targets="$canon_targets $targ"
  96     fi
  97   done
  98 fi
  99
 100 # See which specific instantiations we need.
 101 targetobjs=
 102 all_targets=
 103 default_machine=
 104 default_size=
 105 default_big_endian=
 106 default_osabi=ELFOSABI_NONE
 107 targ_32_little=
 108 targ_32_big=
 109 targ_64_little=
 110 targ_64_big=
 111 for targ in $target $canon_targets; do
 112   if test "$targ" = "all"; then
 113     targ_32_little=yes
 114     targ_32_big=yes
 115     targ_64_little=yes
 116     targ_64_big=yes
 117     all_targets=yes
 118   else
 119     . ${srcdir}/configure.tgt
 120
 121     if test "$targ_obj" = "UNKNOWN"; then
 122       AC_MSG_ERROR("unsupported target $targ")
 123     else
 124       targetobjs="$targetobjs ${targ_obj}.\$(OBJEXT)"
 125       if test "$targ_extra_obj" != ""; then
 126         targetobjs="$targetobjs ${targ_extra_obj}.\$(OBJEXT)"
 127       fi
 128       if test "$targ_size" = "32" -o "$targ_extra_size" = "32"; then
 129           if test "$targ_big_endian" = "true" \
 130               -o "$targ_extra_big_endian" = "true"; then
 131               targ_32_big=yes
 132           fi
 133           if test "$targ_big_endian" = "false" \
 134               -o "$targ_extra_big_endian" = "false"; then
 135               targ_32_little=yes
 136           fi
 137       fi
 138       if test "$targ_size" = "64" -o "$targ_extra_size" = "64"; then
 139           if test "$targ_big_endian" = "true" \
 140               -o "$targ_extra_big_endian" = "true"; then
 141               targ_64_big=yes
 142           fi
 143           if test "$targ_big_endian" = "false" \
 144               -o "$targ_extra_big_endian" = "false"; then
 145               targ_64_little=yes
 146           fi
 147       fi
 148
 149       if test "$target" = "$targ"; then
 150         default_machine=$targ_machine
 151         default_size=$targ_size
 152         default_big_endian=$targ_big_endian
 153         default_osabi=$targ_osabi
 154       fi
 155     fi
 156   fi
 157 done
 158
 159 if test -n "$targ_32_little"; then
 160   AC_DEFINE(HAVE_TARGET_32_LITTLE, 1,
 161               [Define to support 32-bit little-endian targets])
 162 fi
 163 if test -n "$targ_32_big"; then
 164   AC_DEFINE(HAVE_TARGET_32_BIG, 1,
 165               [Define to support 32-bit big-endian targets])
 166 fi
 167 if test -n "$targ_64_little"; then
 168   AC_DEFINE(HAVE_TARGET_64_LITTLE, 1,
 169               [Define to support 64-bit little-endian targets])
 170 fi
 171 if test -n "$targ_64_big"; then
 172   AC_DEFINE(HAVE_TARGET_64_BIG, 1,
 173               [Define to support 64-bit big-endian targets])
 174 fi
 175
 176 if test -n "$all_targets"; then
 177   TARGETOBJS='$(ALL_TARGETOBJS)'
 178 else
 179   TARGETOBJS="$targetobjs"
 180 fi
 181 AC_SUBST(TARGETOBJS)
 182
 183 AC_DEFINE_UNQUOTED(GOLD_DEFAULT_MACHINE, $default_machine,
 184                    [Default machine code])
 185 AC_DEFINE_UNQUOTED(GOLD_DEFAULT_SIZE, $default_size,
 186                    [Default size (32 or 64)])
 187 AC_DEFINE_UNQUOTED(GOLD_DEFAULT_BIG_ENDIAN, $default_big_endian,
 188                    [Default big endian (true or false)])
 189 AC_DEFINE_UNQUOTED(GOLD_DEFAULT_OSABI, $default_osabi,
 190                    [Default OSABI code])
 191
 192 AC_PROG_CC
 193 AC_PROG_CXX
 194 AC_PROG_YACC
 195 AC_PROG_RANLIB
 196 AC_PROG_INSTALL
 197 AC_PROG_LN_S
 198
 199 AC_GNU_SOURCE
 200
 201 ZW_GNU_GETTEXT_SISTER_DIR
 202 AM_PO_SUBDIRS
 203
 204 AC_C_BIGENDIAN
 205
 206 AC_EXEEXT
 207
 208 AM_CONDITIONAL(NATIVE_LINKER,
 209   test "x$target_alias" = "x" -o "x$host_alias" = "x$target_alias")
 210 AM_CONDITIONAL(GCC, test "$GCC" = yes)
 211
 212 dnl Some architectures do not support taking pointers of functions
 213 dnl defined in shared libraries except in -fPIC mode.  We need to
 214 dnl tell the unittest framework if we're compiling for one of those
 215 dnl targets, so it doesn't try to run the tests that do that.
 216 AM_CONDITIONAL(FN_PTRS_IN_SO_WITHOUT_PIC, [
 217   case $target_cpu in
 218     i?86) true;;
 219     x86_64) false;;
 220     sparc64) false;;
 221     *) true;;
 222   esac])
 223
 224 dnl Test for __thread support.
 225 AC_CACHE_CHECK([for thread support], [gold_cv_c_thread],
 226 [AC_COMPILE_IFELSE([__thread int i = 1;],
 227 [gold_cv_c_thread=yes], [gold_cv_c_thread=no])])
 228
 229 AM_CONDITIONAL(TLS, test "$gold_cv_c_thread" = "yes")
 230
 231 dnl On GNU/Linux TLS in static programs only works when using glibc
 232 dnl 2.4 or later.
 233 AC_CACHE_CHECK([for glibc >= 2.4], [gold_cv_lib_glibc24],
 234 [AC_COMPILE_IFELSE([
 235 #include <features.h>
 236 #if !defined __GLIBC__
 237 error
 238 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 4)
 239 error
 240 #endif
 241 ], [gold_cv_lib_glibc24=yes], [gold_cv_lib_glibc24=no])])
 242
 243 AM_CONDITIONAL(STATIC_TLS, test "$gold_cv_lib_glibc24" = "yes")
 244
 245 dnl Test for #pragma omp threadprivate
 246 AC_CACHE_CHECK([for omp support], [gold_cv_c_threadprivate],
 247 [save_CFLAGS="$CFLAGS"
 248 CFLAGS="$CFLAGS -fopenmp"
 249 AC_COMPILE_IFELSE([
 250 #include <omp.h>
 251 int i;
 252 #pragma omp threadprivate (i)
 253 ], [gold_cv_c_threadprivate=yes], [gold_cv_c_threadprivate=no])
 254 CFLAGS="$save_CFLAGS"])
 255 if test "$gold_cv_c_threadprivate" = "yes"; then
 256   AC_DEFINE(HAVE_OMP_SUPPORT, 1,
 257             [Define if compiler supports #pragma omp threadprivate])
 258 fi
 259 AM_CONDITIONAL(OMP_SUPPORT, test "$gold_cv_c_threadprivate" = "yes")
 260
 261 dnl Test for the -ftls-dialect=gnu2 option.
 262 save_CFLAGS="$CFLAGS"
 263 CFLAGS="$CFLAGS -mtls-dialect=gnu2"
 264 AC_COMPILE_IFELSE([int i;], [have_tls_gnu2=yes], [have_tls_gnu2=no])
 265 CFLAGS="$save_CFLAGS"
 266 AM_CONDITIONAL(TLS_GNU2_DIALECT, test "$have_tls_gnu2" = "yes")
 267
 268 dnl On GNU/Linux TLS descriptors are supported by the dynamic loader
 269 dnl only with glibc 2.9 or later.
 270 AC_CACHE_CHECK([for glibc >= 2.9], [gold_cv_lib_glibc29],
 271 [AC_COMPILE_IFELSE([
 272 #include <features.h>
 273 #if !defined __GLIBC__
 274 error
 275 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 9)
 276 error
 277 #endif
 278 ], [gold_cv_lib_glibc29=yes], [gold_cv_lib_glibc29=no])])
 279
 280 AM_CONDITIONAL(TLS_DESCRIPTORS, test "$gold_cv_lib_glibc29" = "yes")
 281
 282 dnl Check whether the compiler supports constructor priorities in
 283 dnl attributes, which were added in gcc 4.3.
 284 AC_CACHE_CHECK([for constructor priorities], [gold_cv_c_conprio],
 285 [AC_COMPILE_IFELSE([void f() __attribute__ ((constructor (1)));],
 286 [gold_cv_c_conprio=yes], [gold_cv_c_conprio=no])])
 287
 288 AM_CONDITIONAL(CONSTRUCTOR_PRIORITY, test "$gold_cv_c_conprio" = "yes")
 289
 290 dnl Test for the -frandom-seed option.
 291 AC_CACHE_CHECK([for -frandom-seed support], [gold_cv_c_random_seed],
 292 [save_CFLAGS="$CFLAGS"
 293 CFLAGS="$CFLAGS -frandom-seed=foo"
 294 AC_COMPILE_IFELSE([int i;], [gold_cv_c_random_seed=yes],
 295 [gold_cv_c_random_seed=no])
 296 CFLAGS="$save_CFLAGS"])
 297 if test "$gold_cv_c_random_seed" = "yes"; then
 298   # In Makefile, '$@' will be expanded to be the name of the file
 299   # being built, providing a unique seed for each file.
 300   RANDOM_SEED_CFLAGS=-frandom-seed=\$@
 301 fi
 302 AC_SUBST(RANDOM_SEED_CFLAGS)
 303
 304 AM_BINUTILS_WARNINGS
 305
 306 WARN_CXXFLAGS=`echo ${WARN_CFLAGS} | sed -e 's/-Wstrict-prototypes//' -e 's/-Wmissing-prototypes//'`
 307 AC_SUBST(WARN_CXXFLAGS)
 308
 309 dnl Force support for large files by default.  This may need to be
 310 dnl host dependent.  If build == host, we can check getconf LFS_CFLAGS.
 311 LFS_CFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
 312 AC_SUBST(LFS_CFLAGS)
 313
 314 AC_CHECK_FUNCS(chsize)
 315 AC_REPLACE_FUNCS(pread ftruncate mremap ffsll)
 316
 317 # Link in zlib if we can.  This allows us to write compressed sections.
 318 AC_SEARCH_LIBS(zlibVersion, z, [AC_CHECK_HEADERS(zlib.h)])
 319 AM_CONDITIONAL(HAVE_ZLIB, test "$ac_cv_search_zlibVersion" != "no")
 320
 321 AC_LANG_PUSH(C++)
 322
 323 AC_CHECK_HEADERS(tr1/unordered_set tr1/unordered_map)
 324 AC_CHECK_HEADERS(ext/hash_map ext/hash_set)
 325 AC_CHECK_HEADERS(byteswap.h)
 326 AC_CHECK_FUNCS(mallinfo posix_fallocate)
 327 AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp])
 328
 329 # Use of ::std::tr1::unordered_map::rehash causes undefined symbols
 330 # at link time with some versions of GCC.
 331 AC_CACHE_CHECK([whether ::std::tr1::unordered_map::rehash is usable.],
 332 [gold_cv_unordered_map_rehash],
 333 [AC_LINK_IFELSE([AC_LANG_PROGRAM([[
 334 #include <tr1/unordered_map>
 335 void bar() { ::std::tr1::unordered_map<int, int> x; x.rehash(10); }
 336 ]])], [gold_cv_unordered_map_rehash=yes], [gold_cv_unordered_map_rehash=no])])
 337 if test "$gold_cv_unordered_map_rehash" = "yes"; then
 338   AC_DEFINE(HAVE_TR1_UNORDERED_MAP_REHASH, 1,
 339             [Define if ::std::tr1::unordered_map::rehash is usable])
 340 fi
 341
 342 # gcc 4.3.0 doesn't recognize the printf attribute on a template
 343 # function.  Check for that.  This is gcc bug 35546.  This test can
 344 # probably be removed after the bug has been fixed for a while.
 345 AC_CACHE_CHECK([whether we can use attributes with template functions],
 346 [gold_cv_template_attribute],
 347 [AC_COMPILE_IFELSE([
 348 template<typename T> extern void foo(const char*, ...)
 349   __attribute__ ((__format__ (__printf__, 1, 2)));
 350 template<typename T> void foo(const char* format, ...) {}
 351 void bar() { foo<int>("%s\n", "foo"); }
 352 ], [gold_cv_template_attribute=yes], [gold_cv_template_attribute=no])])
 353 if test "$gold_cv_template_attribute" = "yes"; then
 354   AC_DEFINE(HAVE_TEMPLATE_ATTRIBUTES, 1,
 355             [Define if attributes work on C++ templates])
 356 fi
 357
 358 AC_LANG_POP(C++)
 359
 360 AM_MAINTAINER_MODE
 361
 362 AC_OUTPUT(Makefile testsuite/Makefile po/Makefile.in:po/Make-in)