ld: Add --enable-separate-code

[deliverable/binutils-gdb.git] / bfd / configure.ac

diff --git a/bfd/configure.ac b/bfd/configure.ac
index 3f2cedfd6359957cb5224a769490c04f48ef08c9..20e2c022e8a5d76853dd1e5dc0564fcecef5578f 100644 (file)
--- a/bfd/configure.ac
+++ b/bfd/configure.ac
@@ -1,6 +1,6 @@
 dnl Process this file with autoconf to produce a configure script.
 dnl
-dnl   Copyright (C) 2012-2017 Free Software Foundation, Inc.
+dnl   Copyright (C) 2012-2018 Free Software Foundation, Inc.
 dnl
 dnl This file is free software; you can redistribute it and/or modify
 dnl it under the terms of the GNU General Public License as published by
@@ -97,6 +97,30 @@ if test $use_secureplt = true; then
     [Define if we should default to creating read-only plt entries])
 fi
 
+# Decide if -z separate-code should be enabled in ELF linker by default.
+ac_default_ld_z_separate_code=unset
+AC_ARG_ENABLE(separate-code,
+             AS_HELP_STRING([--enable-separate-code],
+             [enable -z separate-code in ELF linker by default]),
+[case "${enableval}" in
+  yes) ac_default_ld_z_separate_code=1 ;;
+  no) ac_default_ld_z_separate_code=0 ;;
+esac])
+# Enable -z separate-code by default for Linux/x86.
+case "${target}" in
+i[3-7]86-*-linux-* | x86_64-*-linux-*)
+  if test ${ac_default_ld_z_separate_code} = unset; then
+    ac_default_ld_z_separate_code=1
+  fi
+  ;;
+esac
+if test "${ac_default_ld_z_separate_code}" = unset; then
+  ac_default_ld_z_separate_code=0
+fi
+AC_DEFINE_UNQUOTED(DEFAULT_LD_Z_SEPARATE_CODE,
+  $ac_default_ld_z_separate_code,
+  [Define to 1 if you want to enable -z separate-code in ELF linker by default.])
+
 AC_ARG_ENABLE(leading-mingw64-underscores,
   AS_HELP_STRING([--enable-leading-mingw64-underscores],
                  [Enable leading underscores on 64 bit mingw targets]),
@@ -825,13 +849,6 @@ case ${host64}-${target64}-${want64} in
     ;;
 esac
 
-# elfxx-x86.lo needs elf64.lo with 64-bit BFD.
-case "${bfd_backends}-${wordsize}" in
-  *elfxx-x86.lo*-64*)
-    bfd_backends="${bfd_backends} elf64.lo"
-    ;;
-esac
-
 tdefaults=""
 test -n "${defvec}" && tdefaults="${tdefaults} -DDEFAULT_VECTOR=${defvec}"
 test -n "${selvecs}" && tdefaults="${tdefaults} -DSELECT_VECS='${selvecs}'"