[libc-commits] [libc] [libc] Add `dlfcn.h` placeholder (PR #97501)

[via libc-commits]

lntue wrote:

> LGTM. But I would like to put some TODOs inside the comment. Also, please add a comment about the `dlerror` return in the `Undefined Behavior` document section: https://github.com/llvm/llvm-project/blob/main/libc/docs/dev/undefined_behavior.rst

+1 on adding TODO.  It would be even better if you don't mind creating github issues for those TODOs and link to them in the comments.

https://github.com/llvm/llvm-project/pull/97501