I'm trying to put together an LLVM built toolchain (including LLVM libc) targeting UEFI, currently I get an error saying "Unknown target". This PR enables compiling compiler-rt for UEFI.
Compiler-RT ================================ This directory and its subdirectories contain source code for the compiler support routines. Compiler-RT is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt. ================================