I am trying to create a version of code in a bigger project that is by itself. I know the code runs in the bigger project and believe my problem is in the makefile. The makefile is trying to create RegEx.o from RegEx.h which includes GSUtils, which includes unistd.h.
I have the source for a linux-based program, but trying to run in Win7 environment. I found software called "mingw32" and msys that can compile linux source to win7 using makefile.in (included with source).