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

[Joseph Huber via libc-commits]

jhuber6 wrote:

So, the GPU build just compiles with `-fvisibility=hidden`, I'm wondering if the baremetal build or even all the other targets can do the same thing. If everything were hidden it means  that a dynamic object linked against `libc.a` wouldn't export any `libc` symbols and they'd all resolve in the unit.

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