llvm/20.1.4 package update

[octo-sts]

[octo-sts]

🌐 Build Failed: Environment

mv: can't rename '/home/build/melange-out/llvm//usr/lib/llvm-19/lib/clang/19/bin/hwasan_symbolize': No such file or directory

Build Details

Category	Details
Build System	cmake
Failure Point	mv command during compiler-rt subpackage pipeline

Root Cause Analysis 🔍

The build process is trying to move a file that does not exist (hwasan_symbolize). This is likely due to a packaging script expecting a file to be present from a previous build step, but the file was either not generated or is in a different location.

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[ajayk]

clang-rename has been removed
https://releases.llvm.org/20.1.0/tools/clang/docs/ReleaseNotes.html#id226

[javacruft]

I've put up a draft PR for discussion which switches LLVM to a versioned approach generally - #52810 - rather than directly bumping 19-20 (there is alot of explicit -19 reverse-build-depends from other packages).

[octo-sts]

superseded by #53354