Compiling errors from OptimizerDriver.cpp when compiling on MinGW


I didn't get a clear idea what to do whit this problem:

OptimizerDriver.cpp seems to be unix platform specific. However, I'm compiling this on MinGW. Shouldn't this be moved to lib/System/<platform>?

Any suggestions?

Yes, it should. Another of the many unportable things that need to go
into lib/System.