https://github.com/llvm/llvm-project/commits/main/llvm/docs/Proposals/LLVMLibC.rst https://github.com/llvm/llvm-project/commits/main/llvm/docs/... Merged in 20

https://github.com/llvm/llvm-project/commits/main/llvm/docs/Proposals/LLVMLibC.rst https://github.com/llvm/llvm-project/commits/main/llvm/docs/... Merged in 2019-08, and hasn't been edited since. As linked elsewhere in the thread, https://github.com/llvm/llvm-project/tree/main/libc https://github.com/llvm/llvm-project/tree/main/libc indicates it's alive and well.