Commit a9dab4e4 authored by Andrii Nakryiko's avatar Andrii Nakryiko Committed by Alexei Starovoitov
Browse files

selftests/bpf: Document latest Clang fix expectations for linking tests 



Document which fixes are required to generate correct static linking
selftests.

Signed-off-by: default avatarAndrii Nakryiko <andrii@kernel.org>
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
Acked-by: default avatarYonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20210423181348.1801389-19-andrii@kernel.org
parent 3b2ad502

tools/testing/selftests/bpf/README.rst

+9 −0
Original line number Original line Diff line number Diff line
@@ -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

  libbpf: failed to find BTF for extern 'tcp_slow_start' [25] section: -2





__ https://reviews.llvm.org/D93563

__ 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