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([targets],
  57 [  --enable-targets        alternative target configurations],
  58 [case "${enableval}" in
  59   yes | "")
  60     AC_MSG_ERROR([--enable-targets option must specify target names or 'all'])
  61     ;;
  62   no)
  63     enable_targets=
  64     ;;
  65   *)
  66     enable_targets=$enableval
  67     ;;
  68 esac],
  69 [# For now, enable all targets by default
  70  enable_targets=all
  71 ])
  72
  73 # Canonicalize the enabled targets.
  74 if test -n "$enable_targets"; then
  75   for targ in `echo $enable_targets | sed -e 's/,/ /g'`; do
  76     result=`$ac_config_sub $targ 2>/dev/null`
  77     if test -n "$result"; then
  78       canon_targets="$canon_targets $result"
  79     else
  80       # Permit unrecognized target names, like "all".
  81       canon_targets="$canon_targets $targ"
  82     fi
  83   done
  84 fi
  85
  86 # See which specific instantiations we need.
  87 targetobjs=
  88 all_targets=
  89 default_machine=
  90 default_size=
  91 default_big_endian=
  92 targ_32_little=
  93 targ_32_big=
  94 targ_64_little=
  95 targ_64_big=
  96 for targ in $target $canon_targets; do
  97   if test "$targ" = "all"; then
  98     targ_32_little=yes
  99     targ_32_big=yes
 100     targ_64_little=yes
 101     targ_64_big=yes
 102     all_targets=yes
 103   else
 104     . ${srcdir}/configure.tgt
 105
 106     if test "$targ_obj" = "UNKNOWN"; then
 107       AC_MSG_ERROR("unsupported target $targ")
 108     else
 109       targetobjs="$targetobjs ${targ_obj}.\$(OBJEXT)"
 110       if test "$targ_extra_obj" != ""; then
 111         targetobjs="$targetobjs ${targ_extra_obj}.\$(OBJEXT)"
 112       fi
 113       if test "$targ_size" = "32" -o "$targ_extra_size" = "32"; then
 114           if test "$targ_big_endian" = "true" \
 115               -o "$targ_extra_big_endian" = "true"; then
 116               targ_32_big=yes
 117           fi
 118           if test "$targ_big_endian" = "false" \
 119               -o "$targ_extra_big_endian" = "false"; then
 120               targ_32_little=yes
 121           fi
 122       fi
 123       if test "$targ_size" = "64" -o "$targ_extra_size" = "64"; then
 124           if test "$targ_big_endian" = "true" \
 125               -o "$targ_extra_big_endian" = "true"; then
 126               targ_64_big=yes
 127           fi
 128           if test "$targ_big_endian" = "false" \
 129               -o "$targ_extra_big_endian" = "false"; then
 130               targ_64_little=yes
 131           fi
 132       fi
 133
 134       if test "$target" = "$targ"; then
 135         default_machine=$targ_machine
 136         default_size=$targ_size
 137         default_big_endian=$targ_big_endian
 138       fi
 139     fi
 140   fi
 141 done
 142
 143 if test -n "$targ_32_little"; then
 144   AC_DEFINE(HAVE_TARGET_32_LITTLE, 1,
 145               [Define to support 32-bit little-endian targets])
 146 fi
 147 if test -n "$targ_32_big"; then
 148   AC_DEFINE(HAVE_TARGET_32_BIG, 1,
 149               [Define to support 32-bit big-endian targets])
 150 fi
 151 if test -n "$targ_64_little"; then
 152   AC_DEFINE(HAVE_TARGET_64_LITTLE, 1,
 153               [Define to support 64-bit little-endian targets])
 154 fi
 155 if test -n "$targ_64_big"; then
 156   AC_DEFINE(HAVE_TARGET_64_BIG, 1,
 157               [Define to support 64-bit big-endian targets])
 158 fi
 159
 160 if test -n "$all_targets"; then
 161   TARGETOBJS='$(ALL_TARGETOBJS)'
 162 else
 163   TARGETOBJS="$targetobjs"
 164 fi
 165 AC_SUBST(TARGETOBJS)
 166
 167 AC_DEFINE_UNQUOTED(GOLD_DEFAULT_MACHINE, $default_machine,
 168                    [Default machine code])
 169 AC_DEFINE_UNQUOTED(GOLD_DEFAULT_SIZE, $default_size,
 170                    [Default size (32 or 64)])
 171 AC_DEFINE_UNQUOTED(GOLD_DEFAULT_BIG_ENDIAN, $default_big_endian,
 172                    [Default big endian (true or false)])
 173
 174 AC_PROG_CC
 175 AC_PROG_CXX
 176 AC_PROG_YACC
 177 AC_PROG_RANLIB
 178 AC_PROG_INSTALL
 179 AC_PROG_LN_S
 180
 181 AC_GNU_SOURCE
 182
 183 ZW_GNU_GETTEXT_SISTER_DIR
 184 AM_PO_SUBDIRS
 185
 186 AC_C_BIGENDIAN
 187
 188 AC_EXEEXT
 189
 190 AM_CONDITIONAL(NATIVE_LINKER,
 191   test "x$target_alias" = "x" -o "x$host_alias" = "x$target_alias")
 192 AM_CONDITIONAL(GCC, test "$GCC" = yes)
 193
 194 dnl Some architectures do not support taking pointers of functions
 195 dnl defined in shared libraries except in -fPIC mode.  We need to
 196 dnl tell the unittest framework if we're compiling for one of those
 197 dnl targets, so it doesn't try to run the tests that do that.
 198 AM_CONDITIONAL(FN_PTRS_IN_SO_WITHOUT_PIC, [
 199   case $target_cpu in
 200     i?86) true;;
 201     x86_64) false;;
 202     sparc64) false;;
 203     *) true;;
 204   esac])
 205
 206 dnl Test for __thread support.
 207 AC_CACHE_CHECK([for thread support], [gold_cv_c_thread],
 208 [AC_COMPILE_IFELSE([__thread int i = 1;],
 209 [gold_cv_c_thread=yes], [gold_cv_c_thread=no])])
 210
 211 AM_CONDITIONAL(TLS, test "$gold_cv_c_thread" = "yes")
 212
 213 dnl On GNU/Linux TLS in static programs only works when using glibc
 214 dnl 2.4 or later.
 215 AC_CACHE_CHECK([for glibc >= 2.4], [gold_cv_lib_glibc24],
 216 [AC_COMPILE_IFELSE([
 217 #include <features.h>
 218 #if !defined __GLIBC__
 219 error
 220 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 4)
 221 error
 222 #endif
 223 ], [gold_cv_lib_glibc24=yes], [gold_cv_lib_glibc24=no])])
 224
 225 AM_CONDITIONAL(STATIC_TLS, test "$gold_cv_lib_glibc24" = "yes")
 226
 227 dnl Test for #pragma omp threadprivate
 228 AC_CACHE_CHECK([for omp support], [gold_cv_c_threadprivate],
 229 [save_CFLAGS="$CFLAGS"
 230 CFLAGS="$CFLAGS -fopenmp"
 231 AC_COMPILE_IFELSE([
 232 #include <omp.h>
 233 int i;
 234 #pragma omp threadprivate (i)
 235 ], [gold_cv_c_threadprivate=yes], [gold_cv_c_threadprivate=no])
 236 CFLAGS="$save_CFLAGS"])
 237 if test "$gold_cv_c_threadprivate" = "yes"; then
 238   AC_DEFINE(HAVE_OMP_SUPPORT, 1,
 239             [Define if compiler supports #pragma omp threadprivate])
 240 fi
 241 AM_CONDITIONAL(OMP_SUPPORT, test "$gold_cv_c_threadprivate" = "yes")
 242
 243 dnl Test for the -ftls-dialect=gnu2 option.
 244 save_CFLAGS="$CFLAGS"
 245 CFLAGS="$CFLAGS -mtls-dialect=gnu2"
 246 AC_COMPILE_IFELSE([int i;], [have_tls_gnu2=yes], [have_tls_gnu2=no])
 247 CFLAGS="$save_CFLAGS"
 248 AM_CONDITIONAL(TLS_GNU2_DIALECT, test "$have_tls_gnu2" = "yes")
 249
 250 dnl On GNU/Linux TLS descriptors are supported by the dynamic loader
 251 dnl only with glibc 2.5 or later.
 252 AC_CACHE_CHECK([for glibc >= 2.5], [gold_cv_lib_glibc25],
 253 [AC_COMPILE_IFELSE([
 254 #include <features.h>
 255 #if !defined __GLIBC__
 256 error
 257 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 5)
 258 error
 259 #endif
 260 ], [gold_cv_lib_glibc25=yes], [gold_cv_lib_glibc25=no])])
 261
 262 AM_CONDITIONAL(TLS_DESCRIPTORS, test "$gold_cv_lib_glibc25" = "yes")
 263
 264 dnl Check whether the compiler supports constructor priorities in
 265 dnl attributes, which were added in gcc 4.3.
 266 AC_CACHE_CHECK([for constructor priorities], [gold_cv_c_conprio],
 267 [AC_COMPILE_IFELSE([void f() __attribute__ ((constructor (1)));],
 268 [gold_cv_c_conprio=yes], [gold_cv_c_conprio=no])])
 269
 270 AM_CONDITIONAL(CONSTRUCTOR_PRIORITY, test "$gold_cv_c_conprio" = "yes")
 271
 272 AM_BINUTILS_WARNINGS
 273
 274 WARN_CXXFLAGS=`echo ${WARN_CFLAGS} | sed -e 's/-Wstrict-prototypes//' -e 's/-Wmissing-prototypes//'`
 275 AC_SUBST(WARN_CXXFLAGS)
 276
 277 dnl Force support for large files by default.  This may need to be
 278 dnl host dependent.  If build == host, we can check getconf LFS_CFLAGS.
 279 LFS_CFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
 280 AC_SUBST(LFS_CFLAGS)
 281
 282 AC_REPLACE_FUNCS(pread)
 283
 284 # Link in zlib if we can.  This allows us to write compressed sections.
 285 AC_SEARCH_LIBS(zlibVersion, z, [AC_CHECK_HEADERS(zlib.h)])
 286 AM_CONDITIONAL(HAVE_ZLIB, test "$ac_cv_search_zlibVersion" != "no")
 287
 288 AC_LANG_PUSH(C++)
 289
 290 AC_CHECK_HEADERS(tr1/unordered_set tr1/unordered_map)
 291 AC_CHECK_HEADERS(ext/hash_map ext/hash_set)
 292 AC_CHECK_FUNCS(mallinfo)
 293
 294 # gcc 4.3.0 doesn't recognize the printf attribute on a template
 295 # function.  Check for that.  This is gcc bug 35546.  This test can
 296 # probably be removed after the bug has been fixed for a while.
 297 AC_CACHE_CHECK([whether we can use attributes with template functions],
 298 [gold_cv_template_attribute],
 299 [AC_COMPILE_IFELSE([
 300 template<typename T> extern void foo(const char*, ...)
 301   __attribute__ ((__format__ (__printf__, 1, 2)));
 302 template<typename T> void foo(const char* format, ...) {}
 303 void bar() { foo<int>("%s\n", "foo"); }
 304 ], [gold_cv_template_attribute=yes], [gold_cv_template_attribute=no])])
 305 if test "$gold_cv_template_attribute" = "yes"; then
 306   AC_DEFINE(HAVE_TEMPLATE_ATTRIBUTES, 1,
 307             [Define if attributes work on C++ templates])
 308 fi
 309
 310 AC_LANG_POP(C++)
 311
 312 AM_MAINTAINER_MODE
 313
 314 AC_OUTPUT(Makefile testsuite/Makefile po/Makefile.in:po/Make-in)