.POSIX:
DIRS = \
async \
form \
headers \
hello \
html \
put
all: FORCE
+for d in $(DIRS); do (cd $$d&& $(MAKE)); done
clean: FORCE
+for d in $(DIRS); do (cd $$d&& $(MAKE)clean); done
distclean:clean+for d in $(DIRS); do (cd $$d&& $(MAKE)distclean); done
$(DIRS): FORCE
+cd $@ && $(MAKE)
FORCE: