cbmbasic: Patch Makefile

- Respect existing CFLAGS by appending, rather than replacing.
 - Respect LDFLAGS.
 - Remove -O3 default.

As suggested by leot@

cbmbasic/Makefile

@@ -10,12 +10,6 @@ HOMEPAGE=	https://github.com/mist64/cbmbasic/
 COMMENT=	Portable implementation of Commodore BASIC
 LICENSE=	2-clause-bsd
 
-SUBST_CLASSES+=		makefile
-SUBST_STAGE.makefile=	pre-configure
-SUBST_MESSAGE.makefile=	Adjust Makefile
-SUBST_FILES.makefile=	Makefile
-SUBST_SED.makefile+=	-e 's|-O3||g'
-
 INSTALLATION_DIRS+=	bin
 
 do-install:

cbmbasic/distinfo

@@ -4,3 +4,4 @@ SHA1 (cbmbasic-0.0.20141206-89093eba090d6e1c2d2b6e1cb1616dba0ce9c7f6.tar.gz) = 4
 RMD160 (cbmbasic-0.0.20141206-89093eba090d6e1c2d2b6e1cb1616dba0ce9c7f6.tar.gz) = 2b2d8b5c669ba92e133392a26993d24196027b08
 SHA512 (cbmbasic-0.0.20141206-89093eba090d6e1c2d2b6e1cb1616dba0ce9c7f6.tar.gz) = 136a87af934834f98301d47217d443e50c9e8fd0f45725105c4266795a8f7751a864008d76571cc816c913abcf9ee24e457b35c08fa178c75d4167d7193fde6b
 Size (cbmbasic-0.0.20141206-89093eba090d6e1c2d2b6e1cb1616dba0ce9c7f6.tar.gz) = 169327 bytes
+SHA1 (patch-Makefile) = bf1b3c0747f509ddb23a66021b3abe41fddcff63

cbmbasic/patches/patch-Makefile

@@ -0,0 +1,23 @@
+$NetBSD$
+
+ - Respect existing CFLAGS by appending, rather than replacing.
+ - Respect LDFLAGS
+ - Remove -O3 default.
+
+https://github.com/mist64/cbmbasic/pull/5
+
+--- Makefile
++++ Makefile
+@@ -1,10 +1,10 @@
+ OBJS=cbmbasic.o runtime.o plugin.o console.o
+-CFLAGS=-Wall -O3
++CFLAGS+=-Wall
+ 
+ all: cbmbasic
+ 
+ cbmbasic: $(OBJS)
+-	$(CC) -o cbmbasic $(OBJS)
++	$(CC) $(LDFLAGS) -o cbmbasic $(OBJS)
+ 
+ clean:
+ 	rm -f $(OBJS) cbmbasic