Add cleanup rule

Makefile

@@ -14,6 +14,12 @@ all:
 	@echo >&2
 	@exit 1
 
+%.CLEAN:
+	for d in $$(./tools/find_linux_targets $*) \
+		 $$(./tools/find_avr_targets $*) ; do \
+	    make -C $${d} $@ ; \
+	done
+
 %.LOAD:
 	make -C $$(./tools/find_avr_targets $*) $@
 
@@ -22,3 +28,4 @@ all:
 
 %.LINUX:
 	make -C $$(./tools/find_linux_targets $*) $@
+

lib/avr/Makefile.common

@@ -16,6 +16,9 @@ ifeq ($(TARGET),)
 all:	$(TARGETS:%=%.LINK)
 
 
+%.CLEAN:
+	rm -rf compiled/$*
+
 %.LINK:
 	@mkdir -p compiled/$*
 	make --no-print-directory TARGET=$* $*.LINK

pcio/linux/Makefile

@@ -9,6 +9,10 @@ all: pciotest.LINUX
 %.LINUX: compiled/% | compiled
 	@/bin/true
 
+.PHONY: %.CLEAN
+%.CLEAN: clean
+	@/bin/true
+
 .PRECIOUS: compiled/%
 compiled/%:	%.c | compiled
 	echo $*

tools/find_avr_targets

@@ -16,7 +16,9 @@ all_avr_programs() {
 }
 
 target_dir() {
-    dirname $(egrep -l "$1.CHIP=" ${ROOTDIR}/*/avr/Makefile)
+    local MAKEFILE
+    MAKEFILE=$(egrep -l "$1.CHIP=" ${ROOTDIR}/*/avr/Makefile)
+    [ -n ${MAKEFILE} ] && dirname ${MAKEFILE}
 }
 
 if [ $# -eq 0 ] ; then

tools/find_linux_targets

@@ -17,7 +17,9 @@ all_linux_programs() {
 }
 
 target_dir() {
-    dirname $(egrep -l "^CFLAGS.$1=" ${ROOTDIR}/*/linux/Makefile)
+    local MAKEFILE
+    MAKEFILE=$(egrep -l "^CFLAGS.$1=" ${ROOTDIR}/*/linux/Makefile)
+    [ -n ${MAKEFILE} ] && dirname ${MAKEFILE}
 }
 
 if [ $# -eq 0 ] ; then