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SubjectRe: [PATCH v3 bpf-next 04/14] samples: bpf: use own EXTRA_CFLAGS for clang commands
On Mon, Sep 16, 2019 at 01:35:21PM -0700, Andrii Nakryiko wrote:
>On Mon, Sep 16, 2019 at 4:01 AM Ivan Khoronzhuk
><ivan.khoronzhuk@linaro.org> wrote:
>>
>> It can overlap with CFLAGS used for libraries built with gcc if
>> not now then in next patches. Correct it here for simplicity.
>>
>> Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
>> ---
>
>With GCC BPF front-end recently added, we should probably generalize
>this to something like BPF_EXTRA_CFLAGS or something like that,
>eventually. But for now:
>
>Acked-by: Andrii Nakryiko <andriin@fb.com>

I can replace with BPF_EXTRA_CFLAGS in next v.

>
>> samples/bpf/Makefile | 8 ++++----
>> 1 file changed, 4 insertions(+), 4 deletions(-)
>>
>> diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
>> index b59e77e2250e..8ecc5d0c2d5b 100644
>> --- a/samples/bpf/Makefile
>> +++ b/samples/bpf/Makefile
>> @@ -218,10 +218,10 @@ BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \
>> /bin/rm -f ./llvm_btf_verify.o)
>>
>> ifneq ($(BTF_LLVM_PROBE),)
>> - EXTRA_CFLAGS += -g
>> + CLANG_EXTRA_CFLAGS += -g
>> else
>> ifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PROBE),$(BTF_OBJCOPY_PROBE)),)
>> - EXTRA_CFLAGS += -g
>> + CLANG_EXTRA_CFLAGS += -g
>> LLC_FLAGS += -mattr=dwarfris
>> DWARF2BTF = y
>> endif
>> @@ -280,8 +280,8 @@ $(obj)/hbm_edt_kern.o: $(src)/hbm.h $(src)/hbm_kern.h
>> # useless for BPF samples.
>> $(obj)/%.o: $(src)/%.c
>> @echo " CLANG-bpf " $@
>> - $(Q)$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) -I$(obj) \
>> - -I$(srctree)/tools/testing/selftests/bpf/ \
>> + $(Q)$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(CLANG_EXTRA_CFLAGS) \
>> + -I$(obj) -I$(srctree)/tools/testing/selftests/bpf/ \
>> -D__KERNEL__ -D__BPF_TRACING__ -Wno-unused-value -Wno-pointer-sign \
>> -D__TARGET_ARCH_$(SRCARCH) -Wno-compare-distinct-pointer-types \
>> -Wno-gnu-variable-sized-type-not-at-end \
>> --
>> 2.17.1
>>

--
Regards,
Ivan Khoronzhuk

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