Note: This version of openmp is actually based on 1823581ecb but we are in the process of updating it.
These files are from the llvm-project based on release 21.1.8.
We maintain a local fork of llvm-project that contains any Emscripten specific patches:
https://github.com/emscripten-core/llvm-project
The current patch is based on the emscripten-libs-21 branch.
Run system/lib/update_llvm_openmp.py path/to/llvm-project
For a list of changes from upstream see the OpenMP files that are part of:
https://github.com/llvm/llvm-project/compare/llvmorg-21.1.8...emscripten-core:emscripten-libs-21