[libc-commits] [libc] [libc] Set default visibility for LLVM functions (PR #116686)

[Joseph Huber via libc-commits]

jhuber6 wrote:

> I agree with @jhuber6, I think we should keep `LLVM_LIBC_FUNCTION_ATTR` and introduce a new `config.json` option to let you set the default (and if unset we should default to hidden).

IMO, the default visibility of `libc.a` should be hidden and `lib.so` should be default. Maybe some day we'll install `libc.so`, my understanding is that it is contingent on having `dl.so` functioning.

https://github.com/llvm/llvm-project/pull/116686