[libc-commits] [libc] [libc] `-Wimplicit-fallthrough`, `-Wwrite-strings` and non-GCC warnings (PR #124036)

[Nick Desaulniers via libc-commits]

nickdesaulniers wrote:

Ok, I had to hack around a few issues (linked from this PR) to get our gcc-14 build working. But I'm confident this PR can land (once -Wextra-semi and -Wstrict-prototypes are moved back to clang-only for now).

https://github.com/llvm/llvm-project/pull/124036