[PATCH] CONFIG_UNWIND_INFO

As a foundation for reliable stack unwinding, this adds a config option
(available to all architectures except IA64 and those where the module
loader might have problems with the resulting relocations) to enable the
generation of frame unwind information.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Cc: Miles Bader <uclinux-v850@lsi.nec.co.jp>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Paul Mundt <lethal@linux-sh.org>,
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/Makefile b/Makefile
index cb5790580fc..14781f36e32 100644
--- a/Makefile
+++ b/Makefile
@@ -517,6 +517,10 @@ else
 CFLAGS          += -fomit-frame-pointer
 endif
 
+ifdef CONFIG_UNWIND_INFO
+CFLAGS          += -fasynchronous-unwind-tables
+endif
+
 ifdef CONFIG_DEBUG_INFO
 CFLAGS          += -g
 endif