gcc47: Add __stack_chk_fail_local hack from gcc44

Like gcc44 before it, gcc47 is complaining about the hidden symbol of
__stack_chk_fail_local.  This patch swildner added to gcc44 will fix the
issue, but it is a bit of a hack.  A true fix may end up touching libc,
rtld, and other bits.  The original code is supposd to conserve a PIC
register.

Note that vendor-built GCCs on FreeBSD exhibit the same behavior and as
a consequence only the patched base compiler can be used to build certain
ports.

This hack should be fixed properly as soon as convenient.

diff --git a/contrib/gcc-4.7/README.DRAGONFLY b/contrib/gcc-4.7/README.DRAGONFLY
index b33ac5c..ab3dbb5 100644 (file)
--- a/contrib/gcc-4.7/README.DRAGONFLY
+++ b/contrib/gcc-4.7/README.DRAGONFLY
@@ -29,6 +29,7 @@ libstdc++-v3/config/os/bsd/dragonfly/os_defines.h
 The following files have been patched:
 ==============================================================
 gcc/c-family/c-format.c
+gcc/config/i386/i386.c
 gcc/gcc.c
 gcc/ginclude/stddef.h
 gcc/tree-inline.c

diff --git a/contrib/gcc-4.7/gcc/config/i386/i386.c b/contrib/gcc-4.7/gcc/config/i386/i386.c
index c2c6cd0..852a687 100644 (file)
--- a/contrib/gcc-4.7/gcc/config/i386/i386.c
+++ b/contrib/gcc-4.7/gcc/config/i386/i386.c
@@ -34794,9 +34794,13 @@ ix86_mangle_type (const_tree type)
 static tree ATTRIBUTE_UNUSED
 ix86_stack_protect_fail (void)
 {
+#if 0  /*  Still broken -- affects FreeBSD too  */
   return TARGET_64BIT
         ? default_external_stack_protect_fail ()
         : default_hidden_stack_protect_fail ();
+#else
+  return default_external_stack_protect_fail ();
+#endif
 }
 
 /* Select a format to encode pointers in exception handling data.  CODE