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Subject[tip:x86/asm] objtool: Disable GCC '-Wpacked' warnings
Commit-ID:  21ec3bf6aeb4033210747837421e63286ba32646
Author: Josh Poimboeuf <>
AuthorDate: Thu, 27 Jul 2017 15:56:56 -0500
Committer: Ingo Molnar <>
CommitDate: Fri, 28 Jul 2017 08:33:32 +0200

objtool: Disable GCC '-Wpacked' warnings

Objtool is failing to build with GCC 4.4.7 due to the following

cc1: warnings being treated as errors
In file included from orc.h:21,
from orc_gen.c:21:
orc_types.h:86: error: packed attribute is unnecessary for ‘sp_offset’
orc_types.h:87: error: packed attribute is unnecessary for ‘bp_offset’
orc_types.h:88: error: packed attribute is unnecessary for ‘sp_reg’

I suspect those warnings are a GCC bug. But -Wpacked isn't very useful
anyway, so just disable it.

Signed-off-by: Josh Poimboeuf <>
Cc: Arnd Bergmann <>
Cc: Linus Torvalds <>
Cc: Peter Zijlstra <>
Cc: Thomas Gleixner <>
Fixes: 627fce14809b ("objtool: Add ORC unwind table generation")
Signed-off-by: Ingo Molnar <>
tools/objtool/Makefile | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/objtool/Makefile b/tools/objtool/Makefile
index 3a6425f..6976c73 100644
--- a/tools/objtool/Makefile
+++ b/tools/objtool/Makefile
@@ -25,7 +25,8 @@ OBJTOOL_IN := $(OBJTOOL)-in.o
all: $(OBJTOOL)

INCLUDES := -I$(srctree)/tools/include -I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi
-CFLAGS += -Wall -Werror $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -fomit-frame-pointer -O2 -g $(INCLUDES)
+WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed
+CFLAGS += -Wall -Werror $(WARNINGS) -fomit-frame-pointer -O2 -g $(INCLUDES)

# Allow old libelf to be used:
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