llvm-project

f0054a48 - [libc++] Replace uses of _LIBCPP_WEAK with [[gnu::weak]] (#171798)

[libc++] Replace uses of _LIBCPP_WEAK with [[gnu::weak]] (#171798) Using `_LIBCPP_WEAK` doesn't give us anything that using `[[gnu::weak]]` directly couldn't, so we can just expand the macro. As a drive-by this also refactors `_LIBCPP_OVERRIDABLE_FUNCTION`.