Makefile笔记(5)——经典案例

msm-5.10/tools/testing/selftests/futex$ cat Makefile 
# SPDX-License-Identifier: GPL-2.0
SUBDIRS := functional

TEST_PROGS := run.sh

.PHONY: all clean

include ../lib.mk

all:
        @for DIR in $(SUBDIRS); do              \
                BUILD_TARGET=$(OUTPUT)/$$DIR;   \
                mkdir $$BUILD_TARGET  -p;       \
                $(MAKE) OUTPUT=$$BUILD_TARGET -C $$DIR $@;\
                if [ -e $$DIR/$(TEST_PROGS) ]; then \
                        rsync -a $$DIR/$(TEST_PROGS) $$BUILD_TARGET/; \
                fi \
        done

override define INSTALL_RULE
        mkdir -p $(INSTALL_PATH)
        install -t $(INSTALL_PATH) $(TEST_PROGS) $(TEST_PROGS_EXTENDED) $(TEST_FILES)

        @for SUBDIR in $(SUBDIRS); do \
                BUILD_TARGET=$(OUTPUT)/$$SUBDIR;        \
                mkdir $$BUILD_TARGET  -p;       \
                $(MAKE) OUTPUT=$$BUILD_TARGET -C $$SUBDIR INSTALL_PATH=$(INSTALL_PATH)/$$SUBDIR install; \
        done;
endef

override define CLEAN
        @for DIR in $(SUBDIRS); do              \
                BUILD_TARGET=$(OUTPUT)/$$DIR;   \
                mkdir $$BUILD_TARGET  -p;       \
                $(MAKE) OUTPUT=$$BUILD_TARGET -C $$DIR $@;\
        done
endef