Makefile patch contributed by Greg King:

I added the "MAKEOPTS=" to the top-level "gcc.mak" that he wants, and I
changed the tool source tree's top-level make-file so that it supports
parallel building.  (I added a rule that builds the common library before
building anything else.)


git-svn-id: svn://svn.cc65.org/cc65/trunk@4497 b7a2c559-68d2-44c3-8de9-860c34a00d81

src/make/gcc.mak

@@ -1,21 +1,26 @@
 #
 # gcc Makefile for the program sources
 #
-
-SUBDIRS	=		\
-	common		\
-	ar65		\
-	ca65		\
-	cc65		\
-        chrcvt          \
-	cl65		\
-	co65            \
-	da65		\
-	grc		\
-	ld65		\
+PROGS =		\
+	ar65	\
+	ca65	\
+	cc65	\
+	chrcvt	\
+	cl65	\
+	co65	\
+	da65	\
+	grc	\
+	ld65	\
 	od65
 
-.PHONY: all dist clean zap
-all dist clean zap:
-	for i in $(SUBDIRS); do $(MAKE) -C $$i -f make/gcc.mak $@ || exit $$?; done
+SUBDIRS	= common $(PROGS)
+
+.PHONY: all dist clean zap $(SUBDIRS)
+all dist clean zap:	$(SUBDIRS)
+
+# Finish building the common library before allowing parallel makes.
+$(PROGS):	common
+
+$(SUBDIRS):
+	$(MAKE) -C $@ -f make/gcc.mak $(MAKECMDGOALS)