SCO fixes.

Makefile.conf

@@ -315,8 +315,8 @@ MINORVERSION=MinorVersion
 #LIBS = -lresolv -lsocket -lnsl -lgen
 ##--uw7--
 
-## SCO
-##--sco--
+## SCO (with standard cc compiler)
+##--sco-cc--
 #CF = cf/sco.h
 #PREDEFINES=-DSCO -DBROKEN_ANSI
 #BINDIR = /usr/etc
@@ -332,7 +332,29 @@ MINORVERSION=MinorVersion
 #VARRUN = /etc
 #VARDB = /etc
 #CATMANPAGES=
-##--sco--
+##--sco-cc--
+
+## SCO (with GNU gcc compiler)
+##--sco-gcc--
+#CF = cf/sco.h
+#CC=gcc
+#PREDEFINES=-DSCO
+#LIBS = -lsocket
+#BINDIR = /usr/local/dhcp/bin
+#CLIENTBINDIR = /usr/local/dhcp/bin
+#ADMMANDIR = /usr/local/dhcp/man/cat.ADMN
+#ADMMANEXT = .ADMN.Z
+#FFMANDIR = /usr/local/dhcp/man/cat.SFF
+#FFMANEXT = .SFF.Z
+#INSTALL = /usr/local/bin/install
+#MANFROM = <
+#MANINSTALL = compress
+#MANTO = >
+#VARRUN = /usr/local/dhcp/var
+#VARDB = /usr/local/dhcp/var
+#CATMANPAGES=
+#CLIENT_PATH = '"PATH=/bin:/etc:/usr/bin:/tcb/bin:/usr/bin/X11:/usr/local/bin:/usr/local/dhcp/bin"'
+##--sco-gcc--
 
 ## QNX
 ##--qnx--