[llvm-dev] lld: add build-time control for including ELF / COFF / Mach-O linkers?

[Ed Maste via llvm-dev]

We're in the process of importing lld into FreeBSD (along with our
Clang 3.9 update project). For now I've removed all but the ELF
linker[1]. We have no need for COFF and Mach-O, and we have a bespoke
build system for all of our contrib code. I didn't bother adding build
support for the source files for non-ELF linkers.

Is this something that'd be reasonable / desirable to have extended
and implemented upstream, in the CMake build and perhaps a bit of an
#ifdef mess in tools/lld/lld.cpp::main()?

[1] https://svnweb.freebsd.org/changeset/base/305070