cross compiling from ubuntu for windows

[martin2250]

no issues here, just in case somebody (including future me) needs it:
install compiler:
sudo apt-get install mingw-w64
edit Makefile:
PLATFORM = WINDOWS
CC = /etc/alternatives/i686-w64-mingw32-gcc
WINDOWS_LIBRARIES = -I /usr/i686-w64-mingw32/include

[hansmbakker]

Thank you! Based on your input I created an automated build in #20.