xv6

commit 97657d703f7a92a088b400980c17249f34640a5e
parent 96b7da5f03e8fd1722cb66ef3cb7fcc02d703860
Author: Austin Clements <amdragon@mit.edu>
Date:   Fri, 24 Jun 2011 14:20:51 -0400

Add -fno-omit-frame-pointer to compile flags.

At some point between gcc 4.4 and 4.6, omitting the frame pointer
became default if any -O is specified.  getcallerpcs relies on the
frame pointer, so bring it back.

Diffstat:
M
Makefile
 | 
2
+-

1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/Makefile b/Makefile
@@ -71,7 +71,7 @@ AS = $(TOOLPREFIX)gas
 LD = $(TOOLPREFIX)ld
 OBJCOPY = $(TOOLPREFIX)objcopy
 OBJDUMP = $(TOOLPREFIX)objdump
-CFLAGS = -fno-pic -static -fno-builtin -fno-strict-aliasing -O2 -Wall -MD -ggdb -m32 -Werror
+CFLAGS = -fno-pic -static -fno-builtin -fno-strict-aliasing -O2 -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer
 CFLAGS += $(shell $(CC) -fno-stack-protector -E -x c /dev/null >/dev/null 2>&1 && echo -fno-stack-protector)
 ASFLAGS = -m32 -gdwarf-2
 # FreeBSD ld wants ``elf_i386_fbsd''