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dnl Process this file with autoconf to produce a configure script.

AC_PREREQ(2.59)

AC_INIT(gold, 0.1)

AC_CONFIG_SRCDIR(gold.cc)

AC_CANONICAL_TARGET

AM_INIT_AUTOMAKE

AM_CONFIG_HEADER(config.h:config.in)

AC_ARG_WITH(sysroot,

[  --with-sysroot[=DIR]    search for usr/lib et al within DIR],

[sysroot=$withval], [sysroot=no])

if test "$sysroot" = "yes"; then

  sysroot='${exec_prefix}/${target_alias}/sys-root'

elif test "$sysroot" = "no"; then

  sysroot=

fi

sysroot_relocatable=0

if test -n "$sysroot"; then

  case "sysroot" in

    "${prefix}" | "${prefix}/"* | \

    "${exec_prefix}" | "${exec_prefix}/"* | \

    '${prefix}' | '${prefix}/'*| \

    '${exec_prefix}' | '${exec_prefix}/'*)

      sysroot_relocatable=1

      ;;

  esac

fi

AC_DEFINE_UNQUOTED(TARGET_SYSTEM_ROOT, "$sysroot",

  [System root for target files])

AC_DEFINE_UNQUOTED(TARGET_SYSTEM_ROOT_RELOCATABLE, $sysroot_relocatable,

  [Whether the system root can be relocated])

dnl For now threads are a configure time option.

AC_ARG_ENABLE([threads],

[  --enable-threads        multi-threaded linking],

[case "${enableval}" in

  yes | "") threads=yes ;;

  no) threads=no ;;

  *) threads=yes ;;

 esac],

[threads=no])

if test "$threads" = "yes"; then

  AC_DEFINE(ENABLE_THREADS, 1,

            [Define to do multi-threaded linking])

fi

AM_CONDITIONAL(THREADS, test "$threads" = "yes")

AC_ARG_ENABLE([plugins],

[  --enable-plugins        linker plugins],

[case "${enableval}" in

  yes | "") plugins=yes ;;

  no) plugins=no ;;

  *) plugins=yes ;;

 esac],

[plugins=no])

if test "$plugins" = "yes"; then

  AC_DEFINE(ENABLE_PLUGINS, 1,

            [Define to enable linker plugins])

fi

AM_CONDITIONAL(PLUGINS, test "$plugins" = "yes")

AC_ARG_ENABLE([targets],

[  --enable-targets        alternative target configurations],

[case "${enableval}" in

  yes | "")

    AC_MSG_ERROR([--enable-targets option must specify target names or 'all'])

    ;;

  no)

    enable_targets=

    ;;

  *)

    enable_targets=$enableval

    ;;

esac],

[# For now, enable all targets by default

 enable_targets=all

])

# Canonicalize the enabled targets.

if test -n "$enable_targets"; then

  for targ in `echo $enable_targets | sed -e 's/,/ /g'`; do

    result=`$ac_config_sub $targ 2>/dev/null`

    if test -n "$result"; then

      canon_targets="$canon_targets $result"

    else

      # Permit unrecognized target names, like "all".

      canon_targets="$canon_targets $targ"

    fi

  done

fi

# See which specific instantiations we need.

targetobjs=

all_targets=

default_machine=

default_size=

default_big_endian=

default_osabi=ELFOSABI_NONE

targ_32_little=

targ_32_big=

targ_64_little=

targ_64_big=

for targ in $target $canon_targets; do

  if test "$targ" = "all"; then

    targ_32_little=yes

    targ_32_big=yes

    targ_64_little=yes

    targ_64_big=yes

    all_targets=yes

  else

    . ${srcdir}/configure.tgt

    if test "$targ_obj" = "UNKNOWN"; then

      AC_MSG_ERROR("unsupported target $targ")

    else

      targetobjs="$targetobjs ${targ_obj}.\$(OBJEXT)"

      if test "$targ_extra_obj" != ""; then

        targetobjs="$targetobjs ${targ_extra_obj}.\$(OBJEXT)"

      fi

      if test "$targ_size" = "32" -o "$targ_extra_size" = "32"; then

          if test "$targ_big_endian" = "true" \

              -o "$targ_extra_big_endian" = "true"; then

              targ_32_big=yes

          fi

          if test "$targ_big_endian" = "false" \

              -o "$targ_extra_big_endian" = "false"; then

              targ_32_little=yes

          fi

      fi

      if test "$targ_size" = "64" -o "$targ_extra_size" = "64"; then

          if test "$targ_big_endian" = "true" \

              -o "$targ_extra_big_endian" = "true"; then

              targ_64_big=yes

          fi

          if test "$targ_big_endian" = "false" \

              -o "$targ_extra_big_endian" = "false"; then

              targ_64_little=yes

          fi

      fi

      if test "$target" = "$targ"; then

        default_machine=$targ_machine

        default_size=$targ_size

        default_big_endian=$targ_big_endian

        default_osabi=$targ_osabi

        AM_CONDITIONAL(DEFAULT_TARGET_ARM, test "$targ_obj" = "arm")

        AM_CONDITIONAL(DEFAULT_TARGET_I386, test "$targ_obj" = "i386")

        AM_CONDITIONAL(DEFAULT_TARGET_POWERPC, test "$targ_obj" = "powerpc")

        AM_CONDITIONAL(DEFAULT_TARGET_SPARC, test "$targ_obj" = "sparc")

        AM_CONDITIONAL(DEFAULT_TARGET_X86_64, test "$targ_obj" = "x86_64")

      fi

    fi

  fi

done

if test -n "$targ_32_little"; then

  AC_DEFINE(HAVE_TARGET_32_LITTLE, 1,

              [Define to support 32-bit little-endian targets])

fi

if test -n "$targ_32_big"; then

  AC_DEFINE(HAVE_TARGET_32_BIG, 1,

              [Define to support 32-bit big-endian targets])

fi

if test -n "$targ_64_little"; then

  AC_DEFINE(HAVE_TARGET_64_LITTLE, 1,

              [Define to support 64-bit little-endian targets])

fi

if test -n "$targ_64_big"; then

  AC_DEFINE(HAVE_TARGET_64_BIG, 1,

              [Define to support 64-bit big-endian targets])

fi

if test -n "$all_targets"; then

  TARGETOBJS='$(ALL_TARGETOBJS)'

else

  TARGETOBJS="$targetobjs"

fi

AC_SUBST(TARGETOBJS)

AC_DEFINE_UNQUOTED(GOLD_DEFAULT_MACHINE, $default_machine,

                   [Default machine code])

AC_DEFINE_UNQUOTED(GOLD_DEFAULT_SIZE, $default_size,

                   [Default size (32 or 64)])

AC_DEFINE_UNQUOTED(GOLD_DEFAULT_BIG_ENDIAN, $default_big_endian,

                   [Default big endian (true or false)])

AC_DEFINE_UNQUOTED(GOLD_DEFAULT_OSABI, $default_osabi,

                   [Default OSABI code])

AC_PROG_CC

AC_PROG_CXX

AC_PROG_YACC

AC_PROG_RANLIB

AC_PROG_INSTALL

AC_PROG_LN_S

AC_GNU_SOURCE

ZW_GNU_GETTEXT_SISTER_DIR

AM_PO_SUBDIRS

AC_C_BIGENDIAN

AC_EXEEXT

AM_CONDITIONAL(NATIVE_LINKER,

  test "x$target_alias" = "x" -o "x$host_alias" = "x$target_alias")

AM_CONDITIONAL(GCC, test "$GCC" = yes)

dnl Some architectures do not support taking pointers of functions

dnl defined in shared libraries except in -fPIC mode.  We need to

dnl tell the unittest framework if we're compiling for one of those

dnl targets, so it doesn't try to run the tests that do that.

AM_CONDITIONAL(FN_PTRS_IN_SO_WITHOUT_PIC, [

  case $target_cpu in

    i?86) true;;

    x86_64) false;;

    sparc64) false;;

    *) true;;

  esac])

dnl Whether we can test -mcmodel=medium.

AM_CONDITIONAL(MCMODEL_MEDIUM, [test "$target_cpu" = "x86_64"])

dnl Test for __thread support.

AC_CACHE_CHECK([for thread support], [gold_cv_c_thread],

[AC_COMPILE_IFELSE([__thread int i = 1;],

[gold_cv_c_thread=yes], [gold_cv_c_thread=no])])

AM_CONDITIONAL(TLS, test "$gold_cv_c_thread" = "yes")

dnl On GNU/Linux TLS in static programs only works when using glibc

dnl 2.4 or later.

AC_CACHE_CHECK([for glibc >= 2.4], [gold_cv_lib_glibc24],

[AC_COMPILE_IFELSE([

#include 

#if !defined __GLIBC__

error

#elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 4)

error

#endif

], [gold_cv_lib_glibc24=yes], [gold_cv_lib_glibc24=no])])

AM_CONDITIONAL(STATIC_TLS, test "$gold_cv_lib_glibc24" = "yes")

dnl Test for #pragma omp threadprivate

AC_CACHE_CHECK([for omp support], [gold_cv_c_threadprivate],

[save_CFLAGS="$CFLAGS"

CFLAGS="$CFLAGS -fopenmp"

AC_COMPILE_IFELSE([

#include 

int i;

#pragma omp threadprivate (i)

], [gold_cv_c_threadprivate=yes], [gold_cv_c_threadprivate=no])

CFLAGS="$save_CFLAGS"])

if test "$gold_cv_c_threadprivate" = "yes"; then

  AC_DEFINE(HAVE_OMP_SUPPORT, 1,

            [Define if compiler supports #pragma omp threadprivate])

fi

AM_CONDITIONAL(OMP_SUPPORT, test "$gold_cv_c_threadprivate" = "yes")

dnl Test for the -ftls-dialect=gnu2 option.

save_CFLAGS="$CFLAGS"

CFLAGS="$CFLAGS -mtls-dialect=gnu2"

AC_COMPILE_IFELSE([int i;], [have_tls_gnu2=yes], [have_tls_gnu2=no])

CFLAGS="$save_CFLAGS"

AM_CONDITIONAL(TLS_GNU2_DIALECT, test "$have_tls_gnu2" = "yes")

dnl On GNU/Linux TLS descriptors are supported by the dynamic loader

dnl only with glibc 2.9 or later.

AC_CACHE_CHECK([for glibc >= 2.9], [gold_cv_lib_glibc29],

[AC_COMPILE_IFELSE([

#include 

#if !defined __GLIBC__

error

#elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 9)

error

#endif

], [gold_cv_lib_glibc29=yes], [gold_cv_lib_glibc29=no])])

AM_CONDITIONAL(TLS_DESCRIPTORS, test "$gold_cv_lib_glibc29" = "yes")

dnl Check whether the compiler supports constructor priorities in

dnl attributes, which were added in gcc 4.3.

AC_CACHE_CHECK([for constructor priorities], [gold_cv_c_conprio],

[AC_COMPILE_IFELSE([void f() __attribute__ ((constructor (1)));],

[gold_cv_c_conprio=yes], [gold_cv_c_conprio=no])])

AM_CONDITIONAL(CONSTRUCTOR_PRIORITY, test "$gold_cv_c_conprio" = "yes")

dnl Test for the -frandom-seed option.

AC_CACHE_CHECK([for -frandom-seed support], [gold_cv_c_random_seed],

[save_CFLAGS="$CFLAGS"

CFLAGS="$CFLAGS -frandom-seed=foo"

AC_COMPILE_IFELSE([int i;], [gold_cv_c_random_seed=yes],

[gold_cv_c_random_seed=no])

CFLAGS="$save_CFLAGS"])

if test "$gold_cv_c_random_seed" = "yes"; then

  # In Makefile, '$@' will be expanded to be the name of the file

  # being built, providing a unique seed for each file.

  RANDOM_SEED_CFLAGS=-frandom-seed=\$@

fi

AC_SUBST(RANDOM_SEED_CFLAGS)

AM_BINUTILS_WARNINGS

WARN_CXXFLAGS=`echo ${WARN_CFLAGS} | sed -e 's/-Wstrict-prototypes//' -e 's/-Wmissing-prototypes//'`

AC_SUBST(WARN_CXXFLAGS)

dnl Force support for large files by default.  This may need to be

dnl host dependent.  If build == host, we can check getconf LFS_CFLAGS.

LFS_CFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"

AC_SUBST(LFS_CFLAGS)

AC_CHECK_FUNCS(chsize)

AC_REPLACE_FUNCS(pread ftruncate mremap ffsll)

# Link in zlib if we can.  This allows us to write compressed sections.

AC_SEARCH_LIBS(zlibVersion, z, [AC_CHECK_HEADERS(zlib.h)])

AM_CONDITIONAL(HAVE_ZLIB, test "$ac_cv_search_zlibVersion" != "no")

dnl We have to check these in C, not C++, because autoconf generates

dnl tests which have no type information, and current glibc provides

dnl multiple declarations of functions like basename when compiling

dnl with C++.

AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp])

AC_LANG_PUSH(C++)

AC_CHECK_HEADERS(tr1/unordered_set tr1/unordered_map)

AC_CHECK_HEADERS(ext/hash_map ext/hash_set)

AC_CHECK_HEADERS(byteswap.h)

AC_CHECK_FUNCS(mallinfo posix_fallocate readv)

AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp, strndup, memmem])

# Use of ::std::tr1::unordered_map::rehash causes undefined symbols

# at link time with some versions of GCC.

AC_CACHE_CHECK([whether ::std::tr1::unordered_map::rehash is usable.],

[gold_cv_unordered_map_rehash],

[AC_LINK_IFELSE([AC_LANG_PROGRAM([[

#include 

void bar() { ::std::tr1::unordered_map x; x.rehash(10); }

]])], [gold_cv_unordered_map_rehash=yes], [gold_cv_unordered_map_rehash=no])])

if test "$gold_cv_unordered_map_rehash" = "yes"; then

  AC_DEFINE(HAVE_TR1_UNORDERED_MAP_REHASH, 1,

            [Define if ::std::tr1::unordered_map::rehash is usable])

fi

# gcc 4.3.0 doesn't recognize the printf attribute on a template

# function.  Check for that.  This is gcc bug 35546.  This test can

# probably be removed after the bug has been fixed for a while.

AC_CACHE_CHECK([whether we can use attributes with template functions],

[gold_cv_template_attribute],

[AC_COMPILE_IFELSE([

template extern void foo(const char*, ...)

  __attribute__ ((__format__ (__printf__, 1, 2)));

template void foo(const char* format, ...) {}

void bar() { foo("%s\n", "foo"); }

], [gold_cv_template_attribute=yes], [gold_cv_template_attribute=no])])

if test "$gold_cv_template_attribute" = "yes"; then

  AC_DEFINE(HAVE_TEMPLATE_ATTRIBUTES, 1,

            [Define if attributes work on C++ templates])

fi

AC_LANG_POP(C++)

AM_MAINTAINER_MODE

AC_OUTPUT(Makefile testsuite/Makefile po/Makefile.in:po/Make-in)