diff -ur vmw.orig/src/Makefile.SCO_SV vmw/src/Makefile.SCO_SV
--- vmw.orig/src/Makefile.SCO_SV	2006-03-17 15:42:58.000000000 -0500
+++ vmw/src/Makefile.SCO_SV	2007-05-10 13:08:18.000000000 -0500
@@ -1,21 +1,33 @@
 # makefile for SCO OpenServer
 #
 # Copyright (c) 2006 Ken Kato
+#
+# The latest vmw uses 64-bit integers which are not supported by the SCO
+# compilers.
+# SCO OpenServer 5.0.x builds require you to use a custom gcc toolchain.
+#
+# This build has been tested on gcc-3.4.4 using binutils-2.16.1 both
+# built from source. I don't think the SCO-provided gcc-2.95.6 supports
+# long long.
+# Since we are using a GNU toolchain, we can now use the standard gas version
+# of vmcall.s   John Morris (5/10/07) mailjohnmorris@gmail.com
+#
+#
 
-AS = as
+AS = gas
 ASFLAGS =
 
-CC = cc
+CC = gcc
 CFLAGS = -O
 
 LD = $(CC)
 LDFLAGS =
 
-VMCALL_O = vmcall.sco.o
+VMCALL_O = vmcall.gas.o
 
-CPPFLAGS = -DHAVE_STDINT_H -DHAVE_SETTIMEOFDAY -DHAVE_SIGLONGJMP -DHAVE_USLEEP -DHAVE_ICONV_H
+CPPFLAGS = -DPATH_MAX=256 -DHAVE_SETTIMEOFDAY -DHAVE_SIGLONGJMP -DHAVE_USLEEP
 
-VMWLIB = -lrt
+VMWLIB =
 SHRLIB =
 FTPLIB =