Use "override" when appending to CFLAGS, so this works even when CFLAGS is

specified on the command line.


git-svn-id: svn://svn.cc65.org/cc65/trunk@4271 b7a2c559-68d2-44c3-8de9-860c34a00d81

src/da65/make/gcc.mak

@@ -12,11 +12,11 @@ COMMON	= ../common
 
 #
 CC      = gcc
-CFLAGS  = -g -O2 -Wall -W -std=c89 
-CFLAGS += -I$(COMMON)
+CFLAGS  = -g -O2 -Wall -W -std=c89
+override CFLAGS += -I$(COMMON)
 EBIND   = emxbind
 LDFLAGS =
-        
+
 
 # -----------------------------------------------------------------------------
 # List of all object files