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selftests/bpf: Clarify llvm dependency with btf_tag selftest

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btf_tag selftest needs certain llvm versions (>= llvm14).
Make it clear in the selftests README.rst file.

Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20211112012651.1508549-1-yhs@fb.com
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Yonghong Song 2021-11-11 17:26:51 -08:00 committed by Alexei Starovoitov
parent 5698a42a73
commit 3f1d0dc0ba
1 changed files with 5 additions and 4 deletions
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tools/testing/selftests/bpf/README.rst
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@ -204,16 +204,17 @@ __ https://reviews.llvm.org/D93563
btf_tag test and Clang version
==============================
The btf_tag selftest require LLVM support to recognize the btf_decl_tag attribute.
It was introduced in `Clang 14`__.
The btf_tag selftest requires LLVM support to recognize the btf_decl_tag and
btf_type_tag attributes. They are introduced in `Clang 14` [0_, 1_].
Without it, the btf_tag selftest will be skipped and you will observe:
Without them, the btf_tag selftest will be skipped and you will observe:
.. code-block:: console
#<test_num> btf_tag:SKIP
__ https://reviews.llvm.org/D111588
.. _0: https://reviews.llvm.org/D111588
.. _1: https://reviews.llvm.org/D111199
Clang dependencies for static linking tests
===========================================