[Bug 276104] [exp-run] Against llvm-18-update branch on GitHub

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=276104

--- Comment #70 from commit-hook@FreeBSD.org ---
A commit in branch main references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=8b181c2fbaa8c6b32e5510ef6e3a6d364ff4710e

commit 8b181c2fbaa8c6b32e5510ef6e3a6d364ff4710e
Author:     Dimitry Andric <dim@FreeBSD.org>
AuthorDate: 2024-04-14 17:38:42 +0000
Commit:     Dimitry Andric <dim@FreeBSD.org>
CommitDate: 2024-04-14 17:40:12 +0000

    sanitizers: mark __elf_aux_vector as weak, to allow linking without libsys

    After libsys was introduced, linking sanitized programs started failing
    with:

      # c++ -fsanitize=address main.cc
      ld: error: undefined symbol: __elf_aux_vector
      >>> referenced by sanitizer_linux_libcdep.cpp:950
(/usr/src/contrib/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cpp:950)
      >>>               sanitizer_linux_libcdep.o:(__sanitizer::ReExec()) in
archive /usr/lib/clang/17/lib/freebsd/libclang_rt.asan-x86_64.a
      c++: error: linker command failed with exit code 1 (use -v to see
invocation)

    Mark __elf_aux_vector as weak in the internal sanitizer declaration, so
    the linker will accept it at link time. The dynamic linker will then
    take care of the symbol at run time.

    Suggestion by:  brooks
    PR:             276104, 277393
    MFC after:      1 month

 .../compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cpp        | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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