--- sys/unix/Makefile.utl.orig	2014-08-27 14:21:34.000000000 +0900
+++ sys/unix/Makefile.utl	2014-08-27 15:19:11.000000000 +0900
@@ -15,7 +15,7 @@
 
 # if you are using gcc as your compiler,
 #	uncomment the CC definition below if it's not in your environment
-CC = gcc
+#CC = gcc
 #
 #	For Bull DPX/2 systems at B.O.S. 2.0 or higher use the following:
 #
@@ -89,7 +89,17 @@
 # flags for debugging:
 # CFLAGS = -g -I../include
 
-CFLAGS = -O -I../include
+CFLAGS += -I../include
+ifeq ("$(GRAPHICS)","X11_GRAPHICS")
+CFLAGS += -DX11_GRAPHICS
+endif
+ifeq ("$(GRAPHICS)","QT_GRAPHICS")
+CFLAGS += -DQT_GRAPHICS
+endif
+ifeq ("$(GRAPHICS)","GNOME_GRAPHICS")
+CFLAGS += -DGNOME_GRAPHICS
+endif
+
 LFLAGS =
 
 LIBS =
@@ -101,9 +111,9 @@
 
 # yacc/lex programs to use to generate *_comp.h, *_lex.c, and *_yacc.c.
 # if, instead of yacc/lex you have bison/flex, comment/uncomment the following.
-# YACC     = yacc
+YACC     = yacc
 # LEX      = lex
-YACC     = bison -y
+# YACC     = bison -y
 # YACC     = byacc
 LEX      = flex -8