Musl has long aimed at being a lightweight, simple, free, and correct libc library. However, hindering its adoption has been out-of-tree patches required against GCC for supporting the Musl C library. Fortunately, Musl support has now been merged into GCC.

Following the patches being on the GCC mailing list, merged today into mainline is musl support for GCC.

The Musl C library support in GCC comes in alongside support for glibc, uclibc, and Android's Bionic. Musl is primarily intended for embedded/mobile devices and is MIT-licensed and works on most common CPU architectures. Those wishing to learn more about musl now that there's mainline GCC support, stop by musl-libc.org.