The linker included with OS X is known as ld64 (to distinguish it from an older linker). The source code is available from http://opensource.apple.com/source/ld

The linker included with OS X is known as ld64 (to distinguish it from an older linker). The source code is available from http://opensource.apple.com/source/ld64/ld64-133.3/ http://opensource.apple.com/source/ld64/ld64-133.3/, but it is not a part of the LLVM project and only uses LLVM for LTO support. You can produce standalone binaries with it (adding sections and modifying their attributes with command-line arguments), but it doesn't support linker scripts.