[LLVMLibUnwind] Add version 14.0.6

[ararslan]

No description provided.

[giordano]

CC @gbaraldi in case this helps with JuliaLang/julia#48020

[gbaraldi]

I tried just building from the LLVM repo, but I guess I'm missing some patches, so when yggdrasil is back soon ™️ I will try this out.

[giordano]

Building this in codespaces I get

[15:24:52] CMake Error at /workspace/srcdir/cmake/Modules/HandleOutOfTreeLLVM.cmake:6 (message):
[15:24:52]   The provided LLVM_PATH (/workspace/srcdir/cmake/Modules/../../llvm) is not
[15:24:52]   a valid directory.  Note that building libc++ outside of the monorepo is
[15:24:52]   not supported anymore.  Please use a Standalone build against the monorepo,
[15:24:52]   a Runtimes build or a classic monorepo build.
[15:24:52] Call Stack (most recent call first):
[15:24:52]   CMakeLists.txt:46 (include)
[15:24:52] 
[15:24:52] 
[15:24:52] -- Configuring incomplete, errors occurred!
[15:24:52] See also "/workspace/srcdir/libunwind-14.0.6.src/build/CMakeFiles/CMakeOutput.log".
[15:24:52] See also "/workspace/srcdir/libunwind-14.0.6.src/build/CMakeFiles/CMakeError.log".

[giordano]

For the record, compilation is successful, at least for aarch64-apple-darwin, if using as source the full llvm-project tarball, instead of the single libunwind one.

[ararslan]

Does that mean we should actually try again to do #3540? 😱 Or is it sufficient to switch from using the standalone source tarball for libunwind to the full LLVM one? For 12.0.1 I added a bundled patch that reverts the commit that disallowed standalone builds, but enough has changed since then that it'd be a real pain to adapt that patch. That's why for this one I just added a patch that deletes the error at the top and hoped for the best...

[giordano]

Or is it sufficient to switch from using the standalone source tarball for libunwind to the full LLVM one?

I downloaded the llvm-project tarball and it worked out smoothly. I did it inside the build environment, I didn't update the build script locally, but it shouldn't be too hard

[giordano]

They use it elsewhere, but not in libunwind: https://github.com/llvm/llvm-project/blob/5d87f60f894764bd435086e311605884638d2384/libcxx/include/inttypes.h#L244-L249

[giordano]

License file is missing

Edit: you already fixed it ❤️

[ararslan]

License file is missing

Should be fixed by 3ad149b#diff-3358a3924953c17aa8cedfd626863e654e065c5c0bc1f087fe462d13514c998aR63

[ararslan]

@gbaraldi worth another try now I think 🙂