[libcxx] [llvm] [libc++] Updates the compilers used post LLVM-20 branching. (PR #126564)

[Mark de Wever via llvm-commits]

mordante wrote:

> @mordante I don't know if this is important. Regarding OpenXL compiler: According to the documentation they've changed the base LLVM version between minor versions: 17.1.2 is based on LLVM17 and 17.1.3 is based on LLVM19 https://www.ibm.com/docs/en/openxl-c-and-cpp-aix/17.1.2?topic=whats-new https://www.ibm.com/docs/en/openxl-c-and-cpp-aix/17.1.3?topic=whats-new

Thanks for the information! I feel this belongs in a separate patch and have it reviewed by somebody of IBM. Are you willing to create such a patch?

https://github.com/llvm/llvm-project/pull/126564