402 lines
12 KiB
Plaintext
402 lines
12 KiB
Plaintext
dnl Process this file with autoconf to produce a configure script.
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AC_PREREQ(2.59)
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AC_INIT(gold, 0.1)
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AC_CONFIG_SRCDIR(gold.cc)
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AC_CANONICAL_TARGET
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AM_INIT_AUTOMAKE
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AM_CONFIG_HEADER(config.h:config.in)
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AC_ARG_WITH(sysroot,
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[ --with-sysroot[=DIR] search for usr/lib et al within DIR],
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[sysroot=$withval], [sysroot=no])
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if test "$sysroot" = "yes"; then
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sysroot='${exec_prefix}/${target_alias}/sys-root'
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elif test "$sysroot" = "no"; then
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sysroot=
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fi
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sysroot_relocatable=0
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if test -n "$sysroot"; then
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case "sysroot" in
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"${prefix}" | "${prefix}/"* | \
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"${exec_prefix}" | "${exec_prefix}/"* | \
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'${prefix}' | '${prefix}/'*| \
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'${exec_prefix}' | '${exec_prefix}/'*)
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sysroot_relocatable=1
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;;
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esac
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fi
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AC_DEFINE_UNQUOTED(TARGET_SYSTEM_ROOT, "$sysroot",
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[System root for target files])
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AC_DEFINE_UNQUOTED(TARGET_SYSTEM_ROOT_RELOCATABLE, $sysroot_relocatable,
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[Whether the system root can be relocated])
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dnl For now threads are a configure time option.
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AC_ARG_ENABLE([threads],
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[ --enable-threads multi-threaded linking],
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[case "${enableval}" in
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yes | "") threads=yes ;;
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no) threads=no ;;
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*) threads=yes ;;
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esac],
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[threads=no])
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if test "$threads" = "yes"; then
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AC_DEFINE(ENABLE_THREADS, 1,
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[Define to do multi-threaded linking])
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fi
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AM_CONDITIONAL(THREADS, test "$threads" = "yes")
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AC_ARG_ENABLE([plugins],
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[ --enable-plugins linker plugins],
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[case "${enableval}" in
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yes | "") plugins=yes ;;
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no) plugins=no ;;
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*) plugins=yes ;;
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esac],
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[plugins=no])
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if test "$plugins" = "yes"; then
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AC_DEFINE(ENABLE_PLUGINS, 1,
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[Define to enable linker plugins])
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fi
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AM_CONDITIONAL(PLUGINS, test "$plugins" = "yes")
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AC_ARG_ENABLE([targets],
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[ --enable-targets alternative target configurations],
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[case "${enableval}" in
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yes | "")
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AC_MSG_ERROR([--enable-targets option must specify target names or 'all'])
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;;
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no)
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enable_targets=
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;;
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*)
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enable_targets=$enableval
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;;
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esac],
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[# For now, enable all targets by default
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enable_targets=all
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])
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# Canonicalize the enabled targets.
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if test -n "$enable_targets"; then
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for targ in `echo $enable_targets | sed -e 's/,/ /g'`; do
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result=`$ac_config_sub $targ 2>/dev/null`
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if test -n "$result"; then
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canon_targets="$canon_targets $result"
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else
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# Permit unrecognized target names, like "all".
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canon_targets="$canon_targets $targ"
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fi
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done
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fi
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# See which specific instantiations we need.
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targetobjs=
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all_targets=
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default_machine=
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default_size=
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default_big_endian=
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default_osabi=ELFOSABI_NONE
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targ_32_little=
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targ_32_big=
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targ_64_little=
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targ_64_big=
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for targ in $target $canon_targets; do
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if test "$targ" = "all"; then
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targ_32_little=yes
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targ_32_big=yes
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targ_64_little=yes
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targ_64_big=yes
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all_targets=yes
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else
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. ${srcdir}/configure.tgt
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if test "$targ_obj" = "UNKNOWN"; then
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AC_MSG_ERROR("unsupported target $targ")
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else
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targetobjs="$targetobjs ${targ_obj}.\$(OBJEXT)"
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if test "$targ_extra_obj" != ""; then
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targetobjs="$targetobjs ${targ_extra_obj}.\$(OBJEXT)"
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fi
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if test "$targ_size" = "32" -o "$targ_extra_size" = "32"; then
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if test "$targ_big_endian" = "true" \
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-o "$targ_extra_big_endian" = "true"; then
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targ_32_big=yes
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fi
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if test "$targ_big_endian" = "false" \
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-o "$targ_extra_big_endian" = "false"; then
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targ_32_little=yes
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fi
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fi
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if test "$targ_size" = "64" -o "$targ_extra_size" = "64"; then
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if test "$targ_big_endian" = "true" \
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-o "$targ_extra_big_endian" = "true"; then
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targ_64_big=yes
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fi
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if test "$targ_big_endian" = "false" \
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-o "$targ_extra_big_endian" = "false"; then
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targ_64_little=yes
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fi
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fi
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if test "$target" = "$targ"; then
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default_machine=$targ_machine
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default_size=$targ_size
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default_big_endian=$targ_big_endian
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default_osabi=$targ_osabi
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AM_CONDITIONAL(DEFAULT_TARGET_ARM, test "$targ_obj" = "arm")
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AM_CONDITIONAL(DEFAULT_TARGET_I386, test "$targ_obj" = "i386")
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AM_CONDITIONAL(DEFAULT_TARGET_POWERPC, test "$targ_obj" = "powerpc")
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AM_CONDITIONAL(DEFAULT_TARGET_SPARC, test "$targ_obj" = "sparc")
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AM_CONDITIONAL(DEFAULT_TARGET_X86_64, test "$targ_obj" = "x86_64")
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fi
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fi
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fi
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done
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if test -n "$targ_32_little"; then
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AC_DEFINE(HAVE_TARGET_32_LITTLE, 1,
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[Define to support 32-bit little-endian targets])
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fi
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if test -n "$targ_32_big"; then
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AC_DEFINE(HAVE_TARGET_32_BIG, 1,
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[Define to support 32-bit big-endian targets])
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fi
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if test -n "$targ_64_little"; then
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AC_DEFINE(HAVE_TARGET_64_LITTLE, 1,
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[Define to support 64-bit little-endian targets])
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fi
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if test -n "$targ_64_big"; then
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AC_DEFINE(HAVE_TARGET_64_BIG, 1,
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[Define to support 64-bit big-endian targets])
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fi
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if test -n "$all_targets"; then
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TARGETOBJS='$(ALL_TARGETOBJS)'
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else
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TARGETOBJS="$targetobjs"
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fi
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AC_SUBST(TARGETOBJS)
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AC_DEFINE_UNQUOTED(GOLD_DEFAULT_MACHINE, $default_machine,
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[Default machine code])
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AC_DEFINE_UNQUOTED(GOLD_DEFAULT_SIZE, $default_size,
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[Default size (32 or 64)])
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AC_DEFINE_UNQUOTED(GOLD_DEFAULT_BIG_ENDIAN, $default_big_endian,
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[Default big endian (true or false)])
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AC_DEFINE_UNQUOTED(GOLD_DEFAULT_OSABI, $default_osabi,
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[Default OSABI code])
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AC_PROG_CC
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AC_PROG_CXX
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AC_PROG_YACC
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AC_PROG_RANLIB
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AC_PROG_INSTALL
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AC_PROG_LN_S
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AC_GNU_SOURCE
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ZW_GNU_GETTEXT_SISTER_DIR
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AM_PO_SUBDIRS
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AC_C_BIGENDIAN
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AC_EXEEXT
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AM_CONDITIONAL(NATIVE_LINKER,
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test "x$target_alias" = "x" -o "x$host_alias" = "x$target_alias")
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AM_CONDITIONAL(GCC, test "$GCC" = yes)
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dnl Some architectures do not support taking pointers of functions
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dnl defined in shared libraries except in -fPIC mode. We need to
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dnl tell the unittest framework if we're compiling for one of those
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dnl targets, so it doesn't try to run the tests that do that.
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AM_CONDITIONAL(FN_PTRS_IN_SO_WITHOUT_PIC, [
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case $target_cpu in
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i?86) true;;
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x86_64) false;;
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sparc64) false;;
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*) true;;
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esac])
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dnl Test for gcc 4.1 or later. Full support for -mcmodel=medium is
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dnl only available in gcc 4.1.
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AC_CACHE_CHECK([for gcc >= 4.1], [gold_cv_prog_gcc41],
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[AC_COMPILE_IFELSE([
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#if !defined __GNUC__
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error
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#elif __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 1)
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error
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#endif
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], [gold_cv_prog_gcc41=yes], [gold_cv_prog_gcc41=no])])
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dnl Whether we can test -mcmodel=medium.
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AM_CONDITIONAL(MCMODEL_MEDIUM,
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[test "$target_cpu" = "x86_64" -a "$gold_cv_prog_gcc41" = "yes"])
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dnl Test for __thread support.
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AC_CACHE_CHECK([for thread support], [gold_cv_c_thread],
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[AC_COMPILE_IFELSE([__thread int i = 1;],
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[gold_cv_c_thread=yes], [gold_cv_c_thread=no])])
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AM_CONDITIONAL(TLS, test "$gold_cv_c_thread" = "yes")
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dnl On GNU/Linux TLS in static programs only works when using glibc
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dnl 2.4 or later.
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AC_CACHE_CHECK([for glibc >= 2.4], [gold_cv_lib_glibc24],
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[AC_COMPILE_IFELSE([
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#include <features.h>
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#if !defined __GLIBC__
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error
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#elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 4)
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error
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#endif
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], [gold_cv_lib_glibc24=yes], [gold_cv_lib_glibc24=no])])
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AM_CONDITIONAL(STATIC_TLS, test "$gold_cv_lib_glibc24" = "yes")
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dnl Test for #pragma omp threadprivate
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AC_CACHE_CHECK([for omp support], [gold_cv_c_threadprivate],
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[save_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS -fopenmp"
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AC_COMPILE_IFELSE([
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#include <omp.h>
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int i;
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#pragma omp threadprivate (i)
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], [gold_cv_c_threadprivate=yes], [gold_cv_c_threadprivate=no])
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CFLAGS="$save_CFLAGS"])
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if test "$gold_cv_c_threadprivate" = "yes"; then
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AC_DEFINE(HAVE_OMP_SUPPORT, 1,
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[Define if compiler supports #pragma omp threadprivate])
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fi
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AM_CONDITIONAL(OMP_SUPPORT, test "$gold_cv_c_threadprivate" = "yes")
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dnl Test for the -ftls-dialect=gnu2 option.
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save_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS -mtls-dialect=gnu2"
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AC_COMPILE_IFELSE([int i;], [have_tls_gnu2=yes], [have_tls_gnu2=no])
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CFLAGS="$save_CFLAGS"
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AM_CONDITIONAL(TLS_GNU2_DIALECT, test "$have_tls_gnu2" = "yes")
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dnl On GNU/Linux TLS descriptors are supported by the dynamic loader
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dnl only with glibc 2.9 or later.
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AC_CACHE_CHECK([for glibc >= 2.9], [gold_cv_lib_glibc29],
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[AC_COMPILE_IFELSE([
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#include <features.h>
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#if !defined __GLIBC__
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error
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#elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 9)
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error
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#endif
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], [gold_cv_lib_glibc29=yes], [gold_cv_lib_glibc29=no])])
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AM_CONDITIONAL(TLS_DESCRIPTORS, test "$gold_cv_lib_glibc29" = "yes")
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dnl Check whether the compiler supports constructor priorities in
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dnl attributes, which were added in gcc 4.3.
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AC_CACHE_CHECK([for constructor priorities], [gold_cv_c_conprio],
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[AC_COMPILE_IFELSE([void f() __attribute__ ((constructor (1)));],
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[gold_cv_c_conprio=yes], [gold_cv_c_conprio=no])])
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AM_CONDITIONAL(CONSTRUCTOR_PRIORITY, test "$gold_cv_c_conprio" = "yes")
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dnl Test for the -frandom-seed option.
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AC_CACHE_CHECK([for -frandom-seed support], [gold_cv_c_random_seed],
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[save_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS -frandom-seed=foo"
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AC_COMPILE_IFELSE([int i;], [gold_cv_c_random_seed=yes],
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[gold_cv_c_random_seed=no])
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CFLAGS="$save_CFLAGS"])
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if test "$gold_cv_c_random_seed" = "yes"; then
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# In Makefile, '$@' will be expanded to be the name of the file
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# being built, providing a unique seed for each file.
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RANDOM_SEED_CFLAGS=-frandom-seed=\$@
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fi
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AC_SUBST(RANDOM_SEED_CFLAGS)
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AM_BINUTILS_WARNINGS
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WARN_CXXFLAGS=`echo ${WARN_CFLAGS} | sed -e 's/-Wstrict-prototypes//' -e 's/-Wmissing-prototypes//' -e 's/-Wshadow//'`
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AC_SUBST(WARN_CXXFLAGS)
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dnl Force support for large files by default. This may need to be
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dnl host dependent. If build == host, we can check getconf LFS_CFLAGS.
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LFS_CFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
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AC_SUBST(LFS_CFLAGS)
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AC_CHECK_FUNCS(chsize)
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AC_REPLACE_FUNCS(pread ftruncate mremap ffsll)
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# Link in zlib if we can. This allows us to write compressed sections.
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AC_SEARCH_LIBS(zlibVersion, z, [AC_CHECK_HEADERS(zlib.h)])
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AM_CONDITIONAL(HAVE_ZLIB, test "$ac_cv_search_zlibVersion" != "no")
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dnl We have to check these in C, not C++, because autoconf generates
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dnl tests which have no type information, and current glibc provides
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dnl multiple declarations of functions like basename when compiling
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dnl with C++.
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AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp])
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AC_LANG_PUSH(C++)
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AC_CHECK_HEADERS(tr1/unordered_set tr1/unordered_map)
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AC_CHECK_HEADERS(ext/hash_map ext/hash_set)
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AC_CHECK_HEADERS(byteswap.h)
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AC_CHECK_FUNCS(mallinfo posix_fallocate readv sysconf times)
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AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp, strndup, memmem])
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# Use of ::std::tr1::unordered_map::rehash causes undefined symbols
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# at link time with some versions of GCC.
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AC_CACHE_CHECK([whether ::std::tr1::unordered_map::rehash is usable.],
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[gold_cv_unordered_map_rehash],
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[AC_LINK_IFELSE([AC_LANG_PROGRAM([[
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#include <tr1/unordered_map>
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void bar() { ::std::tr1::unordered_map<int, int> x; x.rehash(10); }
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]])], [gold_cv_unordered_map_rehash=yes], [gold_cv_unordered_map_rehash=no])])
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if test "$gold_cv_unordered_map_rehash" = "yes"; then
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AC_DEFINE(HAVE_TR1_UNORDERED_MAP_REHASH, 1,
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[Define if ::std::tr1::unordered_map::rehash is usable])
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fi
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# gcc 4.3.0 doesn't recognize the printf attribute on a template
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# function. Check for that. This is gcc bug 35546. This test can
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# probably be removed after the bug has been fixed for a while.
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AC_CACHE_CHECK([whether we can use attributes with template functions],
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[gold_cv_template_attribute],
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[AC_COMPILE_IFELSE([
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template<typename T> extern void foo(const char*, ...)
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__attribute__ ((__format__ (__printf__, 1, 2)));
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template<typename T> void foo(const char* format, ...) {}
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void bar() { foo<int>("%s\n", "foo"); }
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], [gold_cv_template_attribute=yes], [gold_cv_template_attribute=no])])
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if test "$gold_cv_template_attribute" = "yes"; then
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AC_DEFINE(HAVE_TEMPLATE_ATTRIBUTES, 1,
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[Define if attributes work on C++ templates])
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fi
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dnl Check if the system has struct stat::st_mtim.
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AC_CACHE_CHECK([for struct stat::st_mtim.],
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[gold_cv_stat_st_mtim],
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[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
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#include <sys/stat.h>
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long bar() { struct stat s; return (long)(s.st_mtim.tv_sec + s.st_mtim.tv_sec);}
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]])], [gold_cv_stat_st_mtim=yes], [gold_cv_stat_st_mtim=no])])
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if test "$gold_cv_stat_st_mtim" = "yes"; then
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AC_DEFINE(HAVE_STAT_ST_MTIM, 1,
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[Define if struct stat has a field st_mtim with timespec for mtime])
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fi
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AC_LANG_POP(C++)
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AM_MAINTAINER_MODE
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AC_OUTPUT(Makefile testsuite/Makefile po/Makefile.in:po/Make-in)
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