patch 8.1.2022: the option.c file is too big
Problem: The option.c file is too big.
Solution: Move option definitions to a separate file. (Yegappan Lakshmanan,
closes #4918)
diff --git a/src/Make_mvc.mak b/src/Make_mvc.mak
index ac02e80..5c9553a 100644
--- a/src/Make_mvc.mak
+++ b/src/Make_mvc.mak
@@ -1604,7 +1604,7 @@
$(OUTDIR)/normal.obj: $(OUTDIR) normal.c $(INCL)
-$(OUTDIR)/option.obj: $(OUTDIR) option.c $(INCL)
+$(OUTDIR)/option.obj: $(OUTDIR) option.c $(INCL) optiondefs.h
$(OUTDIR)/ops.obj: $(OUTDIR) ops.c $(INCL)