On Wed, Jan 23, 2019 at 09:24:35AM -0800, Stanislav Fomichev wrote:
> Before:
> $ make -s -C tools/testing/selftests/bpf
> readelf: Error: Missing knowledge of 32-bit reloc types used in DWARF
> sections of machine number 247
> readelf: Warning: unable to apply unsupported reloc type 10 to section
> .debug_info
> readelf: Warning: unable to apply unsupported reloc type 1 to section
> .debug_info
> readelf: Warning: unable to apply unsupported reloc type 10 to section
> .debug_info
>
> After:
> $ make -s -C tools/testing/selftests/bpf
>
> Signed-off-by: Stanislav Fomichev <s...@google.com>
> ---
> tools/testing/selftests/bpf/Makefile | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/testing/selftests/bpf/Makefile
> b/tools/testing/selftests/bpf/Makefile
> index 70229de510f5..ff3cab5525c1 100644
> --- a/tools/testing/selftests/bpf/Makefile
> +++ b/tools/testing/selftests/bpf/Makefile
> @@ -131,7 +131,7 @@ BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 |
> grep BTF)
> BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i
> 'usage.*llvm')
> BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \
> $(CLANG) -target bpf -O2 -g -c -x c - -o
> ./llvm_btf_verify.o; \
> - readelf -S ./llvm_btf_verify.o | grep BTF; \
> + readelf -S ./llvm_btf_verify.o 2>/dev/null | grep
> BTF; \
> /bin/rm -f ./llvm_btf_verify.o)
Silencing the warning may hide real issue later.
I'd rather fix whatever is necessary in readelf.
Does it use bfd? if so bpf support for bfd was practically complete.
