Includes a mkc configuration file and processes it.
.include <filepath>;
.include <directory> <filepath>; # not yet implemented
For the first form, the .include statement first checks if filepath is a direct match, then for filepath in the mkc units directory.
The second form changes the working directory to directory, then includes filepath.
.include commonpaths.mkc;
.include subdir commonpaths.mkc; # not implemented
.include baseconfig.mkc;
.include 'cflags.mkc';