[cfe-dev] Small patches to allow fully independent clang/llvm/compiler-rt/libc++

[Vasileios Kalintiris via cfe-dev]

> I've been told Musl (http://www.musl-libc.org/) works well as a glibc
> replacement for OpenEmbedded on AArch64, and it even interoperates
> better than expected with libc++.
>
> Not sure about the other targets, but may be worth considering.

I'm able to build a GNU-free toolchain with Musl for the new mips-mti-linux
triple (http://reviews.llvm.org/D13340). We are passing the LLVM test-suite
for static builds with MIPS32 O32 LE/BE. It should be working fine on other
targets too.

- Vasileios