From: Stanislav Fomichev <sdf@google•com>
To: netdev@vger•kernel.org
Cc: davem@davemloft•net, ast@kernel•org, daniel@iogearbox•net,
Stanislav Fomichev <sdf@google•com>
Subject: [PATCH bpf-next] selftests/bpf: suppress readelf stderr when probing for BTF support
Date: Wed, 23 Jan 2019 09:24:35 -0800 [thread overview]
Message-ID: <20190123172435.197862-1-sdf@google.com> (raw)
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 <sdf@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; }" | \
$(CLANG) -target bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \
- readelf -S ./llvm_btf_verify.o | grep BTF; \
+ readelf -S ./llvm_btf_verify.o 2>/dev/null | grep BTF; \
/bin/rm -f ./llvm_btf_verify.o)
ifneq ($(BTF_LLVM_PROBE),)
--
2.20.1.321.g9e740568ce-goog
next reply other threads:[~2019-01-23 17:24 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-23 17:24 Stanislav Fomichev [this message]
2019-01-24 1:45 ` [PATCH bpf-next] selftests/bpf: suppress readelf stderr when probing for BTF support Alexei Starovoitov
2019-01-24 3:15 ` Stanislav Fomichev
2019-01-24 3:47 ` Alexei Starovoitov
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