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 targ_32_little=
 107 targ_32_big=
 108 targ_64_little=
 109 targ_64_big=
 110 for targ in $target $canon_targets; do
 111   if test "$targ" = "all"; then
 112     targ_32_little=yes
 113     targ_32_big=yes
 114     targ_64_little=yes
 115     targ_64_big=yes
 116     all_targets=yes
 117   else
 118     . ${srcdir}/configure.tgt
 119
 120     if test "$targ_obj" = "UNKNOWN"; then
 121       AC_MSG_ERROR("unsupported target $targ")
 122     else
 123       targetobjs="$targetobjs ${targ_obj}.\$(OBJEXT)"
 124       if test "$targ_extra_obj" != ""; then
 125         targetobjs="$targetobjs ${targ_extra_obj}.\$(OBJEXT)"
 126       fi
 127       if test "$targ_size" = "32" -o "$targ_extra_size" = "32"; then
 128           if test "$targ_big_endian" = "true" \
 129               -o "$targ_extra_big_endian" = "true"; then
 130               targ_32_big=yes
 131           fi
 132           if test "$targ_big_endian" = "false" \
 133               -o "$targ_extra_big_endian" = "false"; then
 134               targ_32_little=yes
 135           fi
 136       fi
 137       if test "$targ_size" = "64" -o "$targ_extra_size" = "64"; then
 138           if test "$targ_big_endian" = "true" \
 139               -o "$targ_extra_big_endian" = "true"; then
 140               targ_64_big=yes
 141           fi
 142           if test "$targ_big_endian" = "false" \
 143               -o "$targ_extra_big_endian" = "false"; then
 144               targ_64_little=yes
 145           fi
 146       fi
 147
 148       if test "$target" = "$targ"; then
 149         default_machine=$targ_machine
 150         default_size=$targ_size
 151         default_big_endian=$targ_big_endian
 152       fi
 153     fi
 154   fi
 155 done
 156
 157 if test -n "$targ_32_little"; then
 158   AC_DEFINE(HAVE_TARGET_32_LITTLE, 1,
 159               [Define to support 32-bit little-endian targets])
 160 fi
 161 if test -n "$targ_32_big"; then
 162   AC_DEFINE(HAVE_TARGET_32_BIG, 1,
 163               [Define to support 32-bit big-endian targets])
 164 fi
 165 if test -n "$targ_64_little"; then
 166   AC_DEFINE(HAVE_TARGET_64_LITTLE, 1,
 167               [Define to support 64-bit little-endian targets])
 168 fi
 169 if test -n "$targ_64_big"; then
 170   AC_DEFINE(HAVE_TARGET_64_BIG, 1,
 171               [Define to support 64-bit big-endian targets])
 172 fi
 173
 174 if test -n "$all_targets"; then
 175   TARGETOBJS='$(ALL_TARGETOBJS)'
 176 else
 177   TARGETOBJS="$targetobjs"
 178 fi
 179 AC_SUBST(TARGETOBJS)
 180
 181 AC_DEFINE_UNQUOTED(GOLD_DEFAULT_MACHINE, $default_machine,
 182                    [Default machine code])
 183 AC_DEFINE_UNQUOTED(GOLD_DEFAULT_SIZE, $default_size,
 184                    [Default size (32 or 64)])
 185 AC_DEFINE_UNQUOTED(GOLD_DEFAULT_BIG_ENDIAN, $default_big_endian,
 186                    [Default big endian (true or false)])
 187
 188 AC_PROG_CC
 189 AC_PROG_CXX
 190 AC_PROG_YACC
 191 AC_PROG_RANLIB
 192 AC_PROG_INSTALL
 193 AC_PROG_LN_S
 194
 195 AC_GNU_SOURCE
 196
 197 ZW_GNU_GETTEXT_SISTER_DIR
 198 AM_PO_SUBDIRS
 199
 200 AC_C_BIGENDIAN
 201
 202 AC_EXEEXT
 203
 204 AM_CONDITIONAL(NATIVE_LINKER,
 205   test "x$target_alias" = "x" -o "x$host_alias" = "x$target_alias")
 206 AM_CONDITIONAL(GCC, test "$GCC" = yes)
 207
 208 dnl Some architectures do not support taking pointers of functions
 209 dnl defined in shared libraries except in -fPIC mode.  We need to
 210 dnl tell the unittest framework if we're compiling for one of those
 211 dnl targets, so it doesn't try to run the tests that do that.
 212 AM_CONDITIONAL(FN_PTRS_IN_SO_WITHOUT_PIC, [
 213   case $target_cpu in
 214     i?86) true;;
 215     x86_64) false;;
 216     sparc64) false;;
 217     *) true;;
 218   esac])
 219
 220 dnl Test for __thread support.
 221 AC_CACHE_CHECK([for thread support], [gold_cv_c_thread],
 222 [AC_COMPILE_IFELSE([__thread int i = 1;],
 223 [gold_cv_c_thread=yes], [gold_cv_c_thread=no])])
 224
 225 AM_CONDITIONAL(TLS, test "$gold_cv_c_thread" = "yes")
 226
 227 dnl On GNU/Linux TLS in static programs only works when using glibc
 228 dnl 2.4 or later.
 229 AC_CACHE_CHECK([for glibc >= 2.4], [gold_cv_lib_glibc24],
 230 [AC_COMPILE_IFELSE([
 231 #include <features.h>
 232 #if !defined __GLIBC__
 233 error
 234 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 4)
 235 error
 236 #endif
 237 ], [gold_cv_lib_glibc24=yes], [gold_cv_lib_glibc24=no])])
 238
 239 AM_CONDITIONAL(STATIC_TLS, test "$gold_cv_lib_glibc24" = "yes")
 240
 241 dnl Test for #pragma omp threadprivate
 242 AC_CACHE_CHECK([for omp support], [gold_cv_c_threadprivate],
 243 [save_CFLAGS="$CFLAGS"
 244 CFLAGS="$CFLAGS -fopenmp"
 245 AC_COMPILE_IFELSE([
 246 #include <omp.h>
 247 int i;
 248 #pragma omp threadprivate (i)
 249 ], [gold_cv_c_threadprivate=yes], [gold_cv_c_threadprivate=no])
 250 CFLAGS="$save_CFLAGS"])
 251 if test "$gold_cv_c_threadprivate" = "yes"; then
 252   AC_DEFINE(HAVE_OMP_SUPPORT, 1,
 253             [Define if compiler supports #pragma omp threadprivate])
 254 fi
 255 AM_CONDITIONAL(OMP_SUPPORT, test "$gold_cv_c_threadprivate" = "yes")
 256
 257 dnl Test for the -ftls-dialect=gnu2 option.
 258 save_CFLAGS="$CFLAGS"
 259 CFLAGS="$CFLAGS -mtls-dialect=gnu2"
 260 AC_COMPILE_IFELSE([int i;], [have_tls_gnu2=yes], [have_tls_gnu2=no])
 261 CFLAGS="$save_CFLAGS"
 262 AM_CONDITIONAL(TLS_GNU2_DIALECT, test "$have_tls_gnu2" = "yes")
 263
 264 dnl On GNU/Linux TLS descriptors are supported by the dynamic loader
 265 dnl only with glibc 2.9 or later.
 266 AC_CACHE_CHECK([for glibc >= 2.9], [gold_cv_lib_glibc29],
 267 [AC_COMPILE_IFELSE([
 268 #include <features.h>
 269 #if !defined __GLIBC__
 270 error
 271 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 9)
 272 error
 273 #endif
 274 ], [gold_cv_lib_glibc29=yes], [gold_cv_lib_glibc29=no])])
 275
 276 AM_CONDITIONAL(TLS_DESCRIPTORS, test "$gold_cv_lib_glibc29" = "yes")
 277
 278 dnl Check whether the compiler supports constructor priorities in
 279 dnl attributes, which were added in gcc 4.3.
 280 AC_CACHE_CHECK([for constructor priorities], [gold_cv_c_conprio],
 281 [AC_COMPILE_IFELSE([void f() __attribute__ ((constructor (1)));],
 282 [gold_cv_c_conprio=yes], [gold_cv_c_conprio=no])])
 283
 284 AM_CONDITIONAL(CONSTRUCTOR_PRIORITY, test "$gold_cv_c_conprio" = "yes")
 285
 286 dnl Test for the -frandom-seed option.
 287 AC_CACHE_CHECK([for -frandom-seed support], [gold_cv_c_random_seed],
 288 [save_CFLAGS="$CFLAGS"
 289 CFLAGS="$CFLAGS -frandom-seed=foo"
 290 AC_COMPILE_IFELSE([int i;], [gold_cv_c_random_seed=yes],
 291 [gold_cv_c_random_seed=no])
 292 CFLAGS="$save_CFLAGS"])
 293 if test "$gold_cv_c_random_seed" = "yes"; then
 294   # In Makefile, '$@' will be expanded to be the name of the file
 295   # being built, providing a unique seed for each file.
 296   RANDOM_SEED_CFLAGS=-frandom-seed=\$@
 297 fi
 298 AC_SUBST(RANDOM_SEED_CFLAGS)
 299
 300 AM_BINUTILS_WARNINGS
 301
 302 WARN_CXXFLAGS=`echo ${WARN_CFLAGS} | sed -e 's/-Wstrict-prototypes//' -e 's/-Wmissing-prototypes//'`
 303 AC_SUBST(WARN_CXXFLAGS)
 304
 305 dnl Force support for large files by default.  This may need to be
 306 dnl host dependent.  If build == host, we can check getconf LFS_CFLAGS.
 307 LFS_CFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
 308 AC_SUBST(LFS_CFLAGS)
 309
 310 AC_REPLACE_FUNCS(pread)
 311
 312 # Link in zlib if we can.  This allows us to write compressed sections.
 313 AC_SEARCH_LIBS(zlibVersion, z, [AC_CHECK_HEADERS(zlib.h)])
 314 AM_CONDITIONAL(HAVE_ZLIB, test "$ac_cv_search_zlibVersion" != "no")
 315
 316 AC_LANG_PUSH(C++)
 317
 318 AC_CHECK_HEADERS(tr1/unordered_set tr1/unordered_map)
 319 AC_CHECK_HEADERS(ext/hash_map ext/hash_set)
 320 AC_CHECK_HEADERS(byteswap.h)
 321 AC_CHECK_FUNCS(mallinfo)
 322
 323 # gcc 4.3.0 doesn't recognize the printf attribute on a template
 324 # function.  Check for that.  This is gcc bug 35546.  This test can
 325 # probably be removed after the bug has been fixed for a while.
 326 AC_CACHE_CHECK([whether we can use attributes with template functions],
 327 [gold_cv_template_attribute],
 328 [AC_COMPILE_IFELSE([
 329 template<typename T> extern void foo(const char*, ...)
 330   __attribute__ ((__format__ (__printf__, 1, 2)));
 331 template<typename T> void foo(const char* format, ...) {}
 332 void bar() { foo<int>("%s\n", "foo"); }
 333 ], [gold_cv_template_attribute=yes], [gold_cv_template_attribute=no])])
 334 if test "$gold_cv_template_attribute" = "yes"; then
 335   AC_DEFINE(HAVE_TEMPLATE_ATTRIBUTES, 1,
 336             [Define if attributes work on C++ templates])
 337 fi
 338
 339 AC_LANG_POP(C++)
 340
 341 AM_MAINTAINER_MODE
 342
 343 AC_OUTPUT(Makefile testsuite/Makefile po/Makefile.in:po/Make-in)