Make operation lookups case insensitive on both platforms

Makefile

@@ -4,6 +4,8 @@ all: $(NAME)
 
 .INCLUDE: "Make.engine"
 
+CFLAGS=-D ABCALC_GSOS
+
 $(NAME): fixtype $(OBJS)
 	occ -o $(NAME) $(OBJS)
 
@@ -19,4 +21,4 @@ fixtype:
 	chtyp -l CC ops/*.c ops/*.h
 
 %.o: %.c
-	occ -c $<
+	occ $(CFLAGS) -c $<

ops/abCOp.c

@@ -92,7 +92,11 @@ abCalcOp *abCalcOpLookup(char *name)
     int i;
 
     for (i = 0; i < gNumOps; i++) {
-        if (strcmp(gOps[i].name, name) == 0) {
+#ifdef ABCALC_GSOS
+        if (stricmp(gOps[i].name, name) == 0) {
+#else
+        if (strcasecmp(gOps[i].name, name) == 0) {
+#endif
             return &gOps[i];
         }
     }