-CFLAGS = -Os -nostdinc -Wall -isystem `gcc -print-file-name=include` -fsigned-char
-CFLAGS += -DVERSION=\"${VERSION}\" #"
-CFLAGS += -DTEXTADDR=$(TEXTADDR) -DDEBUG=$(DEBUG)
-CFLAGS += -DMALLOCADDR=$(MALLOCADDR) -DMALLOCSIZE=$(MALLOCSIZE)
-CFLAGS += -DKERNELADDR=$(KERNELADDR)
-CFLAGS += -I ./include
+YBCFLAGS = -Os $(CFLAGS) -nostdinc -Wall -isystem `gcc -print-file-name=include` -fsigned-char
+YBCFLAGS += -DVERSION=\"${VERSION}\" #"
+YBCFLAGS += -DTEXTADDR=$(TEXTADDR) -DDEBUG=$(DEBUG)
+YBCFLAGS += -DMALLOCADDR=$(MALLOCADDR) -DMALLOCSIZE=$(MALLOCSIZE)
+YBCFLAGS += -DKERNELADDR=$(KERNELADDR)
+YBCFLAGS += -I ./include