--- makefile.orig	2014-12-04 21:53:19 UTC
+++ makefile
@@ -17,10 +17,6 @@ CC=gcc
 # CC=gcc -m32 		# 32bit compilation on a 64bit system
 
 CFLAGS=-O2 -DNXT	# on some systems add: -I/usr/include
-			# on a PC:    add -DPC
-			# on Solaris: add -DSOLARIS
-			# on a Mac:   add -DMAC
-			# on HP-UX:   add -Aa
 
 # CFLAGS=-pg -g -DNXT
 
@@ -30,8 +26,6 @@ PICKY=-std=c99 -Wstrict-prototypes -peda
 	-Wcast-qual -Winline -Wall
 
 # when running spin with a different compiler:
-			# on OS2:         spin -Picc -E/Pd+ -E/Q+
-			# for Visual C++: spin -PCL  -E/E
 
 YACC=yacc		# on Solaris: /usr/ccs/bin/yacc
 YFLAGS=-v -d 		# creates y.output and y.tab.h