[GRASS5] mingW: how to exclude win32_pipes.c & user_config.c from compilation?

[Markus Neteler]

Hi,

we have to exclude compilation of
lib/gis/win32_pipes.c
lib/gis/user_config.c

when compiling with mingW. How to modify the Makefile?
Is there a way to define an EXCLUDE variable in this
Makefile and make include/Make/Lib.make aware of it?

I know too little about Makefile programming to implement
it correctly. Throwing files away may not be the solution.

Markus