[libc-commits] [libc] [llvm] [libc] delete hdrgen (PR #117220)

[Nick Desaulniers via libc-commits]

nickdesaulniers wrote:

@jhuber6 I guess with #117265, I'd expect you to start seeing warnings for GPU builds.
https://libc.llvm.org/gpu/building.html specifically mentions `libc` in `DLLVM_ENABLE_PROJECTS`, which as part of the goal of #78479 is to totally avoid any documentation or support for `libc` in `DLLVM_ENABLE_PROJECTS` (only `DLLVM_ENABLE_RUNTIMES` will be supported).

For the diff you suggested, I don't understand the hunk to llvm/CMakeLists.txt; for a runtimes build, I thought llvm/CMakeLists.txt was not invoked? Only libc/CMakeLists.txt? Perhaps I'm mistaken.

If anything, I suspect I should a patch first to relax #117265 for GPU builds, and/or update the GPU docs to avoid any mention of `DLLVM_ENABLE_PROJECTS`+libc.

https://github.com/llvm/llvm-project/pull/117220