dnl "install_as_default" is true if the linker to be installed as the
dnl default linker, ld.
dnl "installed_linker" is the installed gold linker name.
-AC_ARG_ENABLE(gold,
-[[ --enable-gold[=ARG] build gold [ARG={both}[/{gold,ld}]]]],
+
+default_ld=
+AC_ARG_ENABLE(ld,
+[[ --enable-ld[=ARG] build ld [ARG={default,yes,no}]]],
[case "${enableval}" in
- yes)
- install_as_default=gold
- installed_linker=ld
- ;;
- both/gold)
- install_as_default=yes
+ default)
+ default_ld=ld.bfd
+ ;;
+esac])
+
+AC_ARG_ENABLE(gold,
+[[ --enable-gold[=ARG] build gold [ARG={default,yes,no}]]],
+[case "${enableval}" in
+ yes|default)
+ if test x${default_ld} = x; then
+ install_as_default=yes
+ fi
installed_linker=ld.gold
;;
- both|both/ld)
- install_as_default=no
- installed_linker=ld.gold
+ no)
;;
*)
AC_MSG_ERROR([invalid --enable-gold argument])
;;
esac],
-[install_as_default=gold
- installed_linker=ld])
+[install_as_default=no
+ installed_linker=ld.gold])
AC_SUBST(install_as_default)
AC_SUBST(installed_linker)
test "x$target_alias" = "x" -o "x$host_alias" = "x$target_alias")
AM_CONDITIONAL(GCC, test "$GCC" = yes)
+AM_CONDITIONAL(NATIVE_OR_CROSS_LINKER,
+ test "x$target_alias" = "x" -o "x$host_alias" = "x$target_alias" -o "x$host_alias" = "x$build_alias")
+
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
fi
AC_SUBST(RANDOM_SEED_CFLAGS)
+dnl On GNU/Linux ifunc is supported by the dynamic linker in glibc
+dnl 2.11 or later, and by binutils 2.20.1 or later.
+AC_CACHE_CHECK([for glibc >= 2.11], [gold_cv_lib_glibc2_11],
+[AC_COMPILE_IFELSE([
+#include <features.h>
+#if !defined __GLIBC__
+error
+#elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 11)
+error
+#endif
+__asm__(".type foo, %gnu_indirect_function");
+], [gold_cv_lib_glibc2_11=yes], [gold_cv_lib_glibc2_11=no])])
+
+AM_CONDITIONAL(IFUNC, test "$gold_cv_lib_glibc2_11" = "yes")
+
AM_BINUTILS_WARNINGS
WARN_CXXFLAGS=`echo ${WARN_CFLAGS} | sed -e 's/-Wstrict-prototypes//' -e 's/-Wmissing-prototypes//' -e 's/-Wshadow//'`
LFS_CFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
AC_SUBST(LFS_CFLAGS)
-AC_CHECK_FUNCS(chsize)
-AC_REPLACE_FUNCS(pread ftruncate mremap ffsll)
+AC_CHECK_HEADERS(sys/mman.h)
+AC_CHECK_FUNCS(chsize mmap)
+AC_REPLACE_FUNCS(pread ftruncate ffsll)
+
+AC_CACHE_CHECK([mremap with MREMAP_MAYMOVE], [gold_cv_lib_mremap_maymove],
+[AC_LINK_IFELSE([
+AC_LANG_PROGRAM([[
+#include <sys/mman.h>
+void f() { mremap (0, 0, 0, MREMAP_MAYMOVE); }
+]])], [gold_cv_lib_mremap_maymove=yes], [gold_cv_lib_mremap_maymove=no])])
+if test "$gold_cv_lib_mremap_maymove" = "yes"; then
+ AC_DEFINE(HAVE_MREMAP, 1,
+ [Define to 1 if you have the mremap function with MREMAP_MAYMOVE support])
+else
+ AC_LIBOBJ(mremap)
+fi
# Link in zlib if we can. This allows us to write compressed sections.
AC_SEARCH_LIBS(zlibVersion, z, [AC_CHECK_HEADERS(zlib.h)])