From: Asbjørn Sloth Tønnesen <asbjorn@asbjorn.biz>
Date: Fri, 14 Jan 2011 21:22:24 +0000 (+0000)
Subject: Automatically calculate make dependencies
X-Git-Url: http://git.asbjorn.biz/?p=rapper.git;a=commitdiff_plain;h=4d6050e4ef39a538c9272b12436ca1e619f058a1

Automatically calculate make dependencies

Make make use the automatically generated dependency files.

Signed-off-by: Asbjørn Sloth Tønnesen <asbjorn@asbjorn.biz>
---

diff --git a/src/Makefile b/src/Makefile
index bf7dcc7..fbc9ad9 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -11,6 +11,9 @@ USB_OBJS=usb/serial.o usb/core.o usb/desc.o usb/hw.o usb/user.o usb/vcom.o usb/c
 BOARD_OBJS=$(BPATH)/startup.o $(BPATH)/system.o boards/cortex_m3/core_cm3.o
 OBJECTS=main.o $(BOARD_OBJS) $(USB_OBJS)
 
+depend=$(shell sh -c 'b=$$(echo $1|sed -e"s/\\.o$$//g");([ -f $$b.d ] \
+	&& sed -e":a;N;$$!ba;s/\\\\\\n//g" $$b.d|grep "^$$(basename $1):"\
+	| cut -d: -f2)||echo $$b.c')
 
 all: crc
 
@@ -20,7 +23,8 @@ $(PROJECT).elf: $(OBJECTS)
 %.bin: %.elf
 	$(PLATFORM)-objcopy -O binary $< $*.bin
 
-%.o: %.c
+.SECONDEXPANSION:
+%.o: $$(call depend,$$@)
 	$(PLATFORM)-gcc -MM $< -MF $(patsubst %.o,%.d,$@) -MP
 	$(PLATFORM)-gcc $(CFLAGS) -c $< -o $@