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 $target_cpu in
 218     i?86) true;;
 219     x86_64) false;;
 220     sparc64) false;;
 221     *) true;;
 222   esac])
 223
 224 dnl Whether we can test -mcmodel=medium.
 225 AM_CONDITIONAL(MCMODEL_MEDIUM, [test "$target_cpu" = "x86_64"])
 226
 227 dnl Test for __thread support.
 228 AC_CACHE_CHECK([for thread support], [gold_cv_c_thread],
 229 [AC_COMPILE_IFELSE([__thread int i = 1;],
 230 [gold_cv_c_thread=yes], [gold_cv_c_thread=no])])
 231
 232 AM_CONDITIONAL(TLS, test "$gold_cv_c_thread" = "yes")
 233
 234 dnl On GNU/Linux TLS in static programs only works when using glibc
 235 dnl 2.4 or later.
 236 AC_CACHE_CHECK([for glibc >= 2.4], [gold_cv_lib_glibc24],
 237 [AC_COMPILE_IFELSE([
 238 #include <features.h>
 239 #if !defined __GLIBC__
 240 error
 241 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 4)
 242 error
 243 #endif
 244 ], [gold_cv_lib_glibc24=yes], [gold_cv_lib_glibc24=no])])
 245
 246 AM_CONDITIONAL(STATIC_TLS, test "$gold_cv_lib_glibc24" = "yes")
 247
 248 dnl Test for #pragma omp threadprivate
 249 AC_CACHE_CHECK([for omp support], [gold_cv_c_threadprivate],
 250 [save_CFLAGS="$CFLAGS"
 251 CFLAGS="$CFLAGS -fopenmp"
 252 AC_COMPILE_IFELSE([
 253 #include <omp.h>
 254 int i;
 255 #pragma omp threadprivate (i)
 256 ], [gold_cv_c_threadprivate=yes], [gold_cv_c_threadprivate=no])
 257 CFLAGS="$save_CFLAGS"])
 258 if test "$gold_cv_c_threadprivate" = "yes"; then
 259   AC_DEFINE(HAVE_OMP_SUPPORT, 1,
 260             [Define if compiler supports #pragma omp threadprivate])
 261 fi
 262 AM_CONDITIONAL(OMP_SUPPORT, test "$gold_cv_c_threadprivate" = "yes")
 263
 264 dnl Test for the -ftls-dialect=gnu2 option.
 265 save_CFLAGS="$CFLAGS"
 266 CFLAGS="$CFLAGS -mtls-dialect=gnu2"
 267 AC_COMPILE_IFELSE([int i;], [have_tls_gnu2=yes], [have_tls_gnu2=no])
 268 CFLAGS="$save_CFLAGS"
 269 AM_CONDITIONAL(TLS_GNU2_DIALECT, test "$have_tls_gnu2" = "yes")
 270
 271 dnl On GNU/Linux TLS descriptors are supported by the dynamic loader
 272 dnl only with glibc 2.9 or later.
 273 AC_CACHE_CHECK([for glibc >= 2.9], [gold_cv_lib_glibc29],
 274 [AC_COMPILE_IFELSE([
 275 #include <features.h>
 276 #if !defined __GLIBC__
 277 error
 278 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 9)
 279 error
 280 #endif
 281 ], [gold_cv_lib_glibc29=yes], [gold_cv_lib_glibc29=no])])
 282
 283 AM_CONDITIONAL(TLS_DESCRIPTORS, test "$gold_cv_lib_glibc29" = "yes")
 284
 285 dnl Check whether the compiler supports constructor priorities in
 286 dnl attributes, which were added in gcc 4.3.
 287 AC_CACHE_CHECK([for constructor priorities], [gold_cv_c_conprio],
 288 [AC_COMPILE_IFELSE([void f() __attribute__ ((constructor (1)));],
 289 [gold_cv_c_conprio=yes], [gold_cv_c_conprio=no])])
 290
 291 AM_CONDITIONAL(CONSTRUCTOR_PRIORITY, test "$gold_cv_c_conprio" = "yes")
 292
 293 dnl Test for the -frandom-seed option.
 294 AC_CACHE_CHECK([for -frandom-seed support], [gold_cv_c_random_seed],
 295 [save_CFLAGS="$CFLAGS"
 296 CFLAGS="$CFLAGS -frandom-seed=foo"
 297 AC_COMPILE_IFELSE([int i;], [gold_cv_c_random_seed=yes],
 298 [gold_cv_c_random_seed=no])
 299 CFLAGS="$save_CFLAGS"])
 300 if test "$gold_cv_c_random_seed" = "yes"; then
 301   # In Makefile, '$@' will be expanded to be the name of the file
 302   # being built, providing a unique seed for each file.
 303   RANDOM_SEED_CFLAGS=-frandom-seed=\$@
 304 fi
 305 AC_SUBST(RANDOM_SEED_CFLAGS)
 306
 307 AM_BINUTILS_WARNINGS
 308
 309 WARN_CXXFLAGS=`echo ${WARN_CFLAGS} | sed -e 's/-Wstrict-prototypes//' -e 's/-Wmissing-prototypes//'`
 310 AC_SUBST(WARN_CXXFLAGS)
 311
 312 dnl Force support for large files by default.  This may need to be
 313 dnl host dependent.  If build == host, we can check getconf LFS_CFLAGS.
 314 LFS_CFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
 315 AC_SUBST(LFS_CFLAGS)
 316
 317 AC_CHECK_FUNCS(chsize)
 318 AC_REPLACE_FUNCS(pread ftruncate mremap ffsll)
 319
 320 # Link in zlib if we can.  This allows us to write compressed sections.
 321 AC_SEARCH_LIBS(zlibVersion, z, [AC_CHECK_HEADERS(zlib.h)])
 322 AM_CONDITIONAL(HAVE_ZLIB, test "$ac_cv_search_zlibVersion" != "no")
 323
 324 dnl We have to check these in C, not C++, because autoconf generates
 325 dnl tests which have no type information, and current glibc provides
 326 dnl multiple declarations of functions like basename when compiling
 327 dnl with C++.
 328 AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp])
 329
 330 AC_LANG_PUSH(C++)
 331
 332 AC_CHECK_HEADERS(tr1/unordered_set tr1/unordered_map)
 333 AC_CHECK_HEADERS(ext/hash_map ext/hash_set)
 334 AC_CHECK_HEADERS(byteswap.h)
 335 AC_CHECK_FUNCS(mallinfo posix_fallocate)
 336 AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp, strndup, memmem])
 337
 338 # Use of ::std::tr1::unordered_map::rehash causes undefined symbols
 339 # at link time with some versions of GCC.
 340 AC_CACHE_CHECK([whether ::std::tr1::unordered_map::rehash is usable.],
 341 [gold_cv_unordered_map_rehash],
 342 [AC_LINK_IFELSE([AC_LANG_PROGRAM([[
 343 #include <tr1/unordered_map>
 344 void bar() { ::std::tr1::unordered_map<int, int> x; x.rehash(10); }
 345 ]])], [gold_cv_unordered_map_rehash=yes], [gold_cv_unordered_map_rehash=no])])
 346 if test "$gold_cv_unordered_map_rehash" = "yes"; then
 347   AC_DEFINE(HAVE_TR1_UNORDERED_MAP_REHASH, 1,
 348             [Define if ::std::tr1::unordered_map::rehash is usable])
 349 fi
 350
 351 # gcc 4.3.0 doesn't recognize the printf attribute on a template
 352 # function.  Check for that.  This is gcc bug 35546.  This test can
 353 # probably be removed after the bug has been fixed for a while.
 354 AC_CACHE_CHECK([whether we can use attributes with template functions],
 355 [gold_cv_template_attribute],
 356 [AC_COMPILE_IFELSE([
 357 template<typename T> extern void foo(const char*, ...)
 358   __attribute__ ((__format__ (__printf__, 1, 2)));
 359 template<typename T> void foo(const char* format, ...) {}
 360 void bar() { foo<int>("%s\n", "foo"); }
 361 ], [gold_cv_template_attribute=yes], [gold_cv_template_attribute=no])])
 362 if test "$gold_cv_template_attribute" = "yes"; then
 363   AC_DEFINE(HAVE_TEMPLATE_ATTRIBUTES, 1,
 364             [Define if attributes work on C++ templates])
 365 fi
 366
 367 AC_LANG_POP(C++)
 368
 369 AM_MAINTAINER_MODE
 370
 371 AC_OUTPUT(Makefile testsuite/Makefile po/Makefile.in:po/Make-in)