When on darwin, compiler_flags need to be percolated down to the 'gcc -r'
command line so that relinked .o files can be built universal.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27837 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/autoconf/m4/libtool.m4 b/autoconf/m4/libtool.m4
index dfb6e0f..f4260d0 100644
--- a/autoconf/m4/libtool.m4
+++ b/autoconf/m4/libtool.m4
@@ -2099,7 +2099,7 @@
 case $host_os in
   darwin*)
     if test "$GCC" = yes; then
-      reload_cmds='$CC -nostdlib ${wl}-r -o $output$reload_objs'
+      reload_cmds='$CC -nostdlib ${wl}-r $compiler_flags -o $output$reload_objs'
     else
       reload_cmds='$LD$reload_flag -o $output$reload_objs'
     fi