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

[Joseph Huber via libc-commits]

jhuber6 wrote:

Okay, so I think the solution here is to land https://github.com/llvm/llvm-project/pull/97123 to make all the entrypoints have visibility set correctly, and to allow the user to configure the visibility on the entrypoints. (default is default). Then we can modify this one to basically just do
```
$ find . -type f -exec sed -i -e 's/namespace LIBC_NAMESPACE/namespace [[gnu::visibility("hidden")]] LIBC_NAMESPACE' {} \;
```

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