Commit 0030cbf0 authored Jun 23, 2005 by Matthias Urlichs Committed by Linus Torvalds Jun 23, 2005

[PATCH] Turn off sibling call optimization w/ frame pointers



Frame pointers are supposed to enable debuggers to reliably tell where a
call comes from.  That is defeated by GCC's sibling call optimization (aka
tail recursion elimination).

This patch turns this optimization off when compiling with frame pointers.

Signed-Off-By: Matthias Urlichs <smurf@smurf.noris.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent 71a2224d

Makefile

+1 −1

Original line number	Diff line number	Diff line
		@@ -518,7 +518,7 @@ CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LOOPS,-loops)
		CFLAGS += $(call add-align,CONFIG_CC_ALIGN_JUMPS,-jumps)

		ifdef CONFIG_FRAME_POINTER
		CFLAGS += -fno-omit-frame-pointer
		CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
		else
		CFLAGS += -fomit-frame-pointer
		endif