Factor platform specific makefile directives out into their own makefile
fragments.  This is gross, but having tons of confusing conditionals all
throughout the build system seems worst.

Credits got to Casey Carter for the idea.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3705 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed