First, make sure you're using a reasonably up to date snapshot.
You're up to date if "nm /usr/lib/crtbegin.o" mentions __guard_local.
Next, apply the patch below to GCC, recompile, and install:
$ cd /usr/src/gnu/gcc/gcc
$ patch < /path/to/diff
$ cd /usr/src/gnu/usr.bin/cc
$ make depend && make && make install
Finally, test that stuff still works after you build it. :) In
particular, make sure that you can still do a full "make build" by
following release(8).
Please email me back with test reports. I'm interested in getting a
variety of (ELF) architectures before committing this.
Thanks!
Index: targhooks.c
===================================================================
RCS file: /cvs/src/gnu/gcc/gcc/targhooks.c,v
retrieving revision 1.2
diff -u -p -r1.2 targhooks.c
--- targhooks.c 9 May 2010 11:48:50 -0000 1.2
+++ targhooks.c 29 Aug 2012 18:05:48 -0000
@@ -372,7 +372,7 @@ default_stack_protect_guard (void)
if (t == NULL)
{
- t = build_decl (VAR_DECL, get_identifier ("__guard"), ptr_type_node);
+ t = build_decl (VAR_DECL, get_identifier ("__guard_local"),
ptr_type_node);
TREE_STATIC (t) = 1;
TREE_PUBLIC (t) = 1;
DECL_EXTERNAL (t) = 1;
@@ -380,6 +380,8 @@ default_stack_protect_guard (void)
TREE_THIS_VOLATILE (t) = 1;
DECL_ARTIFICIAL (t) = 1;
DECL_IGNORED_P (t) = 1;
+ DECL_VISIBILITY (t) = VISIBILITY_HIDDEN;
+ DECL_VISIBILITY_SPECIFIED (t) = 1;
stack_chk_guard_decl = t;
}
