ccc: Start defining host information.
 - For use by the driver in places where the host alters driver
   behavior (for example, running as a driver driver on darwin).

 - Allow user override for testing purposes.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@61967 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed