Factor out common preprocessor-related bits to Makefile.rules. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74153 91177308-0d34-0410-b5e6-96231b3b80d8
Nice addition to the examples and also a starting point for Sanjiv to work on. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73013 91177308-0d34-0410-b5e6-96231b3b80d8