[libc-commits] [libc] [libc] Add LIBC_NAMESPACE_HIDDEN_DECL macro (PR #97109)

[via libc-commits]

https://github.com/lntue commented:

I'm thinking about moving all of our internal implementation to something like `#define LIBC_NAMESPACE_INTERNAL LIBC_NAMESPACE::internal` and make that has hidden visibility by default.  We will only leave entry point functions in `LIBC_NAMESPACE`. WDYT?

tagging @frobtech @brooksmoses

https://github.com/llvm/llvm-project/pull/97109