Changed PHYSFS_file to PHYSFS_File to match rest of API's naming convention. This won't break binary compat (function signatures are extern "C" so name mangling doesn't apply), and I've placed a typedef for the old name to support legacy source code.

require 'mkmf'

$CFLAGS += `sdl-config --cflags`.chomp
$LDFLAGS += `sdl-config --libs`.chomp

have_library "physfs", "PHYSFS_init"
have_library "SDL", "SDL_AllocRW"

create_makefile "physfs_so"