mirror of
https://github.com/torvalds/linux.git
synced 2024-11-23 20:51:44 +00:00
21ec3bf6ae
Objtool is failing to build with GCC 4.4.7 due to the following
warnings:
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 <jpoimboe@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: 627fce1480 ("objtool: Add ORC unwind table generation")
Link: http://lkml.kernel.org/r/76d85d7b5a87566465095c500bce222ff5d7b146.1501188854.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
73 lines
2.6 KiB
Makefile
73 lines
2.6 KiB
Makefile
include ../scripts/Makefile.include
|
|
include ../scripts/Makefile.arch
|
|
|
|
ifeq ($(ARCH),x86_64)
|
|
ARCH := x86
|
|
endif
|
|
|
|
# always use the host compiler
|
|
CC = gcc
|
|
LD = ld
|
|
AR = ar
|
|
|
|
ifeq ($(srctree),)
|
|
srctree := $(patsubst %/,%,$(dir $(CURDIR)))
|
|
srctree := $(patsubst %/,%,$(dir $(srctree)))
|
|
endif
|
|
|
|
SUBCMD_SRCDIR = $(srctree)/tools/lib/subcmd/
|
|
LIBSUBCMD_OUTPUT = $(if $(OUTPUT),$(OUTPUT),$(CURDIR)/)
|
|
LIBSUBCMD = $(LIBSUBCMD_OUTPUT)libsubcmd.a
|
|
|
|
OBJTOOL := $(OUTPUT)objtool
|
|
OBJTOOL_IN := $(OBJTOOL)-in.o
|
|
|
|
all: $(OBJTOOL)
|
|
|
|
INCLUDES := -I$(srctree)/tools/include -I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi
|
|
WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed
|
|
CFLAGS += -Wall -Werror $(WARNINGS) -fomit-frame-pointer -O2 -g $(INCLUDES)
|
|
LDFLAGS += -lelf $(LIBSUBCMD)
|
|
|
|
# Allow old libelf to be used:
|
|
elfshdr := $(shell echo '\#include <libelf.h>' | $(CC) $(CFLAGS) -x c -E - | grep elf_getshdr)
|
|
CFLAGS += $(if $(elfshdr),,-DLIBELF_USE_DEPRECATED)
|
|
|
|
AWK = awk
|
|
export srctree OUTPUT CFLAGS SRCARCH AWK
|
|
include $(srctree)/tools/build/Makefile.include
|
|
|
|
$(OBJTOOL_IN): fixdep FORCE
|
|
@$(MAKE) $(build)=objtool
|
|
|
|
# Busybox's diff doesn't have -I, avoid warning in that case
|
|
#
|
|
$(OBJTOOL): $(LIBSUBCMD) $(OBJTOOL_IN)
|
|
@(diff -I 2>&1 | grep -q 'option requires an argument' && \
|
|
test -d ../../kernel -a -d ../../tools -a -d ../objtool && (( \
|
|
diff -I'^#include' arch/x86/insn/insn.c ../../arch/x86/lib/insn.c >/dev/null && \
|
|
diff -I'^#include' arch/x86/insn/inat.c ../../arch/x86/lib/inat.c >/dev/null && \
|
|
diff arch/x86/insn/x86-opcode-map.txt ../../arch/x86/lib/x86-opcode-map.txt >/dev/null && \
|
|
diff arch/x86/insn/gen-insn-attr-x86.awk ../../arch/x86/tools/gen-insn-attr-x86.awk >/dev/null && \
|
|
diff -I'^#include' arch/x86/insn/insn.h ../../arch/x86/include/asm/insn.h >/dev/null && \
|
|
diff -I'^#include' arch/x86/insn/inat.h ../../arch/x86/include/asm/inat.h >/dev/null && \
|
|
diff -I'^#include' arch/x86/insn/inat_types.h ../../arch/x86/include/asm/inat_types.h >/dev/null) \
|
|
|| echo "warning: objtool: x86 instruction decoder differs from kernel" >&2 )) || true
|
|
@(test -d ../../kernel -a -d ../../tools -a -d ../objtool && (( \
|
|
diff ../../arch/x86/include/asm/orc_types.h orc_types.h >/dev/null) \
|
|
|| echo "warning: objtool: orc_types.h differs from kernel" >&2 )) || true
|
|
$(QUIET_LINK)$(CC) $(OBJTOOL_IN) $(LDFLAGS) -o $@
|
|
|
|
|
|
$(LIBSUBCMD): fixdep FORCE
|
|
$(Q)$(MAKE) -C $(SUBCMD_SRCDIR) OUTPUT=$(LIBSUBCMD_OUTPUT)
|
|
|
|
clean:
|
|
$(call QUIET_CLEAN, objtool) $(RM) $(OBJTOOL)
|
|
$(Q)find $(OUTPUT) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete
|
|
$(Q)$(RM) $(OUTPUT)arch/x86/insn/inat-tables.c $(OUTPUT)fixdep
|
|
|
|
FORCE:
|
|
|
|
.PHONY: clean FORCE
|