Fixes#166833.
The build creates a symlink for this assuming it's present,
so be sure it's there when filtering the source for clang.
Alternatively we could use LLVM_EXTERNAL_CLANG_TOOLS_EXTRA_SOURCE_DIR.
lld package provides an unwrapped lld. It doesn't always work on NixOS
(eg, it doesn't set rpath), and so dosen't always work.
What one should be using instead is the `lld` from
`llvmPackages.bintools` package. This super counterintutive.
One incremental step we can take here is to clarify that the `lld`
package is unrwapped -- right now, it looks like 100% legit thing one
should be using!
Reduces closure size by ~240MiB (down to ~100MiB) for
LLVM 13, the others are similar.
Having those archives in the lib output makes no sense
as they are no runtime dependencies. Removing them
alltogether is also not an option because the dynamic
libraries offer only the C API while many users of
libllvm require the C++ API. Those users must have an
dependency on libllvm.dev anyway and will find those
files for linking.
This fixes a CI warning [0]:
Run cat "$HOME/changed_files" | xargs -r editorconfig-checker -disable-indent-size
pkgs/development/compilers/llvm/14/lld/default.nix:
28: Wrong indent style found (tabs instead of spaces)
29: Wrong indent style found (tabs instead of spaces)
30: Wrong indent style found (tabs instead of spaces)
[0]: https://github.com/NixOS/nixpkgs/runs/5351700772
Janne Heß