diff options
| author | Pu Lehui <pulehui@huawei.com> | 2021-10-21 20:39:13 +0800 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2021-10-21 15:09:23 -0700 |
| commit | 44ce0ac11e4e6dd1aee2e41e7d74f95f3b961cfb (patch) | |
| tree | 1e8ec97aaa8f85730fcdb21008af17704638987b /samples | |
| parent | db5b6a46f43aba3473c8b6b1d11aff1fa2aa354b (diff) | |
| download | linux-44ce0ac11e4e6dd1aee2e41e7d74f95f3b961cfb.tar.bz2 | |
samples: bpf: Suppress readelf stderr when probing for BTF support
When compiling bpf samples, the following warning appears:
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
Same problem was mentioned in commit 2f0921262ba9 ("selftests/bpf:
suppress readelf stderr when probing for BTF support"), let's use
readelf that supports btf.
Signed-off-by: Pu Lehui <pulehui@huawei.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20211021123913.48833-1-pulehui@huawei.com
Diffstat (limited to 'samples')
| -rw-r--r-- | samples/bpf/Makefile | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile index 4c5ad15f8d28..c8106835f209 100644 --- a/samples/bpf/Makefile +++ b/samples/bpf/Makefile @@ -229,6 +229,7 @@ CLANG ?= clang OPT ?= opt LLVM_DIS ?= llvm-dis LLVM_OBJCOPY ?= llvm-objcopy +LLVM_READELF ?= llvm-readelf BTF_PAHOLE ?= pahole # Detect that we're cross compiling and use the cross compiler @@ -252,7 +253,7 @@ 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; \ + $(LLVM_READELF) -S ./llvm_btf_verify.o | grep BTF; \ /bin/rm -f ./llvm_btf_verify.o) BPF_EXTRA_CFLAGS += -fno-stack-protector |