OpenKropki can be built using the included Makefiles.

on Linux (native):
$ make

on Linux, cross-compiling a Windows .exe (MinGW-w64):
$ make -f Makefile.cross PREFIX=/path/to/x86_64-w64-mingw32
$ make -f Makefile.cross PREFIX=... dist
  See the comments at the top of Makefile.cross for packages,
  SDL2/SDL2_ttf MinGW archives, zlib, and runtime DLLs.

on Windows (through mingw32 or mingw64):
$ mingw32-make -f Makefile.mingw

Building OpenKropki requires following things:
 - a sane C compiler (typically gcc or clang)
 - SDL2 version 2.0.4+
 - SDL_ttf version 2.0.12+
 - libfreetype-6
 - zlib
