dnl Process this file with autoconf to produce a configure script.
AC_PREREQ(2.59)
-AC_INIT
-AC_CONFIG_SRCDIR([gold.cc])
+
+AC_INIT(gold, 0.1)
+AC_CONFIG_SRCDIR(gold.cc)
AC_CANONICAL_TARGET
-AM_INIT_AUTOMAKE(gold, 0.1)
+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([targets],
[ --enable-targets alternative target configurations],
[case "${enableval}" in
fi
# See which specific instantiations we need.
+targetobjs=
+all_targets=
+default_machine=
+default_size=
+default_big_endian=
+targ_32_little=
+targ_32_big=
+targ_64_little=
+targ_64_big=
for targ in $target $canon_targets; do
- targ_32_little=
- targ_32_big=
- targ_64_little=
- targ_64_big=
if test "$targ" = "all"; then
targ_32_little=yes
targ_32_big=yes
targ_64_little=yes
targ_64_big=yes
+ all_targets=yes
else
- case "$targ" in
- i?86-*) targ_32_little=yes ;;
- x86_64-*) targ_64_little=yes ;;
- *)
- AC_MSG_ERROR("target $targ: unknown size and endianness")
- ;;
- esac
+ . ${srcdir}/configure.tgt
+
+ if test "$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
+ fi
+ fi
fi
done
[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, $default_big_endian,
+ [Default big endian (true or false)])
+
AC_PROG_CC
AC_PROG_CXX
AC_PROG_YACC
AC_PROG_RANLIB
AC_PROG_INSTALL
+AC_PROG_LN_S
+
+AC_GNU_SOURCE
+
ZW_GNU_GETTEXT_SISTER_DIR
AM_PO_SUBDIRS
AC_EXEEXT
+AM_CONDITIONAL(NATIVE_LINKER,
+ test "x$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 $target_cpu in
+ i?86) true;;
+ x86_64) false;;
+ sparc64) false;;
+ *) true;;
+ esac])
+
+dnl Test for __thread support.
+AC_CACHE_CHECK([for thread support], [gold_cv_c_thread],
+[AC_COMPILE_IFELSE([__thread int i = 1;],
+[gold_cv_c_thread=yes], [gold_cv_c_thread=no])])
+
+AM_CONDITIONAL(TLS, test "$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 <features.h>
+#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="$CFLAGS -fopenmp"
+AC_COMPILE_IFELSE([
+#include <omp.h>
+int i;
+#pragma omp threadprivate (i)
+], [gold_cv_c_threadprivate=yes], [gold_cv_c_threadprivate=no])
+CFLAGS="$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 2.5 or later.
+AC_CACHE_CHECK([for glibc >= 2.5], [gold_cv_lib_glibc25],
+[AC_COMPILE_IFELSE([
+#include <features.h>
+#if !defined __GLIBC__
+error
+#elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 5)
+error
+#endif
+], [gold_cv_lib_glibc25=yes], [gold_cv_lib_glibc25=no])])
+
+AM_CONDITIONAL(TLS_DESCRIPTORS, test "$gold_cv_lib_glibc25" = "yes")
+
+dnl Check whether the compiler supports constructor priorities in
+dnl attributes, which were added in gcc 4.3.
+AC_CACHE_CHECK([for constructor priorities], [gold_cv_c_conprio],
+[AC_COMPILE_IFELSE([void f() __attribute__ ((constructor (1)));],
+[gold_cv_c_conprio=yes], [gold_cv_c_conprio=no])])
+
+AM_CONDITIONAL(CONSTRUCTOR_PRIORITY, test "$gold_cv_c_conprio" = "yes")
+
AM_BINUTILS_WARNINGS
WARN_CXXFLAGS=`echo ${WARN_CFLAGS} | sed -e 's/-Wstrict-prototypes//' -e 's/-Wmissing-prototypes//'`
dnl Force support for large files by default. This may need to be
dnl host dependent. If build == host, we can check getconf LFS_CFLAGS.
-LFS_CXXFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
-AC_SUBST(LFS_CXXFLAGS)
+LFS_CFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
+AC_SUBST(LFS_CFLAGS)
+
+AC_REPLACE_FUNCS(pread)
+
+# Link in zlib if we can. This allows us to write compressed sections.
+AC_SEARCH_LIBS(zlibVersion, z, [AC_CHECK_HEADERS(zlib.h)])
+AM_CONDITIONAL(HAVE_ZLIB, test "$ac_cv_search_zlibVersion" != "no")
AC_LANG_PUSH(C++)
AC_CHECK_HEADERS(tr1/unordered_set tr1/unordered_map)
AC_CHECK_HEADERS(ext/hash_map ext/hash_set)
+AC_CHECK_FUNCS(mallinfo)
-dnl Test whether the compiler can specify a member templates to call.
-AC_COMPILE_IFELSE([
-class c { public: template<int i> void fn(); };
-template<int i> void foo(c cv) { cv.fn<i>(); }
-template void foo<1>(c cv);],
-[AC_DEFINE(HAVE_MEMBER_TEMPLATE_SPECIFICATIONS, [],
- [Whether the C++ compiler can call a template member with no arguments])])
+# 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<typename T> extern void foo(const char*, ...)
+ __attribute__ ((__format__ (__printf__, 1, 2)));
+template<typename T> void foo(const char* format, ...) {}
+void bar() { foo<int>("%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++)