--- makefile.orig	Mon Apr 23 16:28:04 2012
+++ makefile	Fri Feb 19 07:57:30 2021
@@ -300,7 +300,7 @@
   CFLAGS_O = -O0
   BUILD_FEATURES = - debugging support
 else
-  CFLAGS_O = -O2
+  CFLAGS_O = $(CFLAGS)
   LDFLAGS_O = 
   GCC_MAJOR_VERSION = $(firstword $(subst  ., ,$(GCC_VERSION)))
   ifneq (3,$(GCC_MAJOR_VERSION))
@@ -523,7 +523,7 @@
 	${IBM1130D}/ibm1130_fmt.c ${IBM1130D}/ibm1130_ptrp.c \
 	${IBM1130D}/ibm1130_plot.c ${IBM1130D}/ibm1130_sca.c \
 	${IBM1130D}/ibm1130_t2741.c
-IBM1130_OPT = -I ${IBM1130D}
+IBM1130_OPT = -I ${IBM1130D} -D HAVE_VM_INIT
 
 
 ID16D = Interdata
@@ -570,7 +570,7 @@
 	${ALTAIRZ80D}/s100_scp300f.c ${ALTAIRZ80D}/sim_imd.c \
 	${ALTAIRZ80D}/wd179x.c ${ALTAIRZ80D}/s100_hdc1001.c \
 	${ALTAIRZ80D}/s100_if3.c ${ALTAIRZ80D}/s100_adcs6.c
-ALTAIRZ80_OPT = -I ${ALTAIRZ80D}
+ALTAIRZ80_OPT = -I ${ALTAIRZ80D} -D HAVE_VM_INIT
 
 
 GRID = GRI