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| author | Andrii Nakryiko <andrii@kernel.org> | 2021-04-23 11:13:48 -0700 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2021-04-23 14:05:28 -0700 |
| commit | a9dab4e4569425e26cd9c2d8bdcc74bd12fcb8bf (patch) | |
| tree | e054801eecfb87259c54528bc5190d5efe48a510 | |
| parent | 3b2ad502256b7f0f9415978fd7f158656d11401e (diff) | |
| download | linux-a9dab4e4569425e26cd9c2d8bdcc74bd12fcb8bf.tar.bz2 | |
selftests/bpf: Document latest Clang fix expectations for linking tests
Document which fixes are required to generate correct static linking
selftests.
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20210423181348.1801389-19-andrii@kernel.org
| -rw-r--r-- | tools/testing/selftests/bpf/README.rst | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/README.rst b/tools/testing/selftests/bpf/README.rst index 65fe318d1e71..3353778c30f8 100644 --- a/tools/testing/selftests/bpf/README.rst +++ b/tools/testing/selftests/bpf/README.rst @@ -193,3 +193,12 @@ Without it, the error from compiling bpf selftests looks like: libbpf: failed to find BTF for extern 'tcp_slow_start' [25] section: -2 __ https://reviews.llvm.org/D93563 + +Clang dependencies for static linking tests +=========================================== + +linked_vars, linked_maps, and linked_funcs tests depend on `Clang fix`__ to +generate valid BTF information for weak variables. Please make sure you use +Clang that contains the fix. + +__ https://reviews.llvm.org/D100362 |