+Create a .R file for it which:
+ - defines a Recipe symbol for it if it requires auxiliary object
+ files (make sure the general Recipe symbol doesn't contain the
+ icon)
+ - adds it to the `ALL' definition, to ensure it is compiled into
+ the OS X binary
+ - adds it as a GTK build target, with the optional GTK icon
+ - adds it as a Windows build target, with the optional resource
+ file
+ - adds auxiliary solver binaries if any
+ - adds it to $(GAMES) in the GTK makefile, for `make install'
+ - adds it to list.c for the OS X binary
+ - adds it to wingames.lst along with a textual name, for the build
+ system and Windows installer.