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| author | Vasily Gorbik <gor@linux.ibm.com> | 2020-10-05 18:50:28 +0300 |
|---|---|---|
| committer | Josh Poimboeuf <jpoimboe@redhat.com> | 2020-10-06 17:32:13 +0300 |
| commit | 2486baae2cf6df73554144d0a4e40ae8809b54d4 (patch) | |
| tree | 13ad1994cbfcc1028638cf0133b64e70c6958d94 /tools/objtool | |
| parent | b0b8e56b82c06b3bb6e5fb66d0e9c9c3fd3ce555 (diff) | |
| download | linux-2486baae2cf6df73554144d0a4e40ae8809b54d4.tar.xz | |
objtool: Allow nested externs to enable BUILD_BUG()
Currently BUILD_BUG() macro is expanded to smth like the following:
do {
extern void __compiletime_assert_0(void)
__attribute__((error("BUILD_BUG failed")));
if (!(!(1)))
__compiletime_assert_0();
} while (0);
If used in a function body this obviously would produce build errors
with -Wnested-externs and -Werror.
Build objtool with -Wno-nested-externs to enable BUILD_BUG() usage.
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Diffstat (limited to 'tools/objtool')
| -rw-r--r-- | tools/objtool/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/objtool/Makefile b/tools/objtool/Makefile index 33d1e3ca8efd..4ea9a833dde7 100644 --- a/tools/objtool/Makefile +++ b/tools/objtool/Makefile @@ -37,7 +37,7 @@ INCLUDES := -I$(srctree)/tools/include \ -I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \ -I$(srctree)/tools/arch/$(SRCARCH)/include \ -I$(srctree)/tools/objtool/arch/$(SRCARCH)/include -WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed +WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed -Wno-nested-externs CFLAGS := -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES) $(LIBELF_FLAGS) LDFLAGS += $(LIBELF_LIBS) $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS) |