# Running make in this directory will build everything recursively.

# To build hello only, run "make hello".

.SUFFIXES:

/ := ../

include $/config.mk

subdirs := $(dir $(sort $(wildcard */Makefile)))

build := $(patsubst %,build-%,$(subdirs))

clean := $(patsubst %,clean-%,$(subdirs)) clean-hello

install := $(patsubst %,install-%,$(subdirs))

all: hello $(build)

clean: $(clean)

install: $(if $(DESTDIR),$(install),no-destdir-install)

build-%:

$(MAKE) -C $*

clean-%:

$(MAKE) -C $* clean

install-%:

$(MAKE) -C $* DESTDIR=$(abspath $(DESTDIR)) install

.SILENT: $(build) $(clean) $(install)

hello: hello.o

$(CC) -o $@ $<

hello.o: hello.c

$(CC)$(if $(CFLAGS), $(CLFAGS)) -c $<

clean-hello:

rm -f hello hello.o hello.d

define subtargets

$1%.o:

$$(MAKE) -C $$(dir $$@) $$(notdir $$@)

endef

$(foreach d,$(subdirs),$(eval $(call subtargets,$d)))

test:

@echo $(subdirs)