+fifteen : [G] WINDOWS COMMON fifteen
+sixteen : [G] WINDOWS COMMON sixteen
+rect : [G] WINDOWS COMMON rect
+pattern : [G] WINDOWS COMMON pattern
+
+# Mac OS X unified application containing all the puzzles.
+Puzzles : [MX] macosx COMMON ALL
+
+# The `nullgame' source file is a largely blank one, which contains
+# all the correct function definitions to compile and link, but
+# which defines the null game in which nothing is ever drawn and
+# there are no valid moves. Its main purpose is to act as a
+# template for writing new game definition source files. I include
+# it in the Makefile because it will be worse than useless if it
+# ever fails to compile, so it's important that it should actually
+# be built on a regular basis.
+nullgame : [X] gtk COMMON nullgame
+nullgame : [G] WINDOWS COMMON nullgame