$NetBSD$

--- Makefile.orig	2017-03-29 09:04:15.000000000 +0000
+++ Makefile
@@ -1,6 +1,15 @@
 CFG ?= default
 -include config.$(CFG)
 
+DEBUG = 0
+OPTIMISE = 1
+FLAGS = -DUSE_C -DNDEBUG
+BACKEND=mixer_sdl
+COLOUR_DEPTH=16
+OSTYPE=freebsd
+VERBOSE=1
+MULTI_THREAD=1
+
 BACKENDS      = allegro gdi opengl sdl sdl2 mixer_sdl posix
 COLOUR_DEPTHS = 0 16
 OSTYPES       = amiga beos cygwin freebsd haiku linux mingw mac
