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make是一个指令工具,它解释makefile中的指令或者说规则。makefile文件描述了整个工程中所有文件的编译顺序,编译规则。Makefile也有自己的编写规则,通常,我们所使用的IDE都会生成相应的makefile,然后再根据makefile来进行编译,只是这些操作是由IDE来完成,我们只需要点击一个编译按钮。
现在可以在GitHub上看到,很多的开源项目,在编译的时候,都是使用make来完成的,也就是说,都有其对应的makefile。他们都有个特点,那就是文件很多。当你工程的文件多了以后,时间一长,可能你自己都不能记住所有的文件。所以,这个时候我们就可以使用make来根据makefile对整个项目进行管理。除此之外,make还有一个优点,那就是当你修改你的文件以后,make只会编译更新的文件以及它相关依赖的文件。这里后边进行详细的解释,意思就是,当你只修改了几十个文件中的某一个文件时,make只会重新编译跟你修改的文件有关联的文件,而不是所有的文件。这就大大的减短了编译的时间。
:= --直接式变量展开,引用的变量或者函数都会被其定义值替换,如果:= 右端为空,可能是赋值了一个空格; = 及 define --递归式变量展开,在引用处只是文本替换,在使用时才会展开; $ --取变量值操作,可以嵌套使用,例如$($(X))。同时可以用于调用内嵌函数:$(FCTION ARGUMENTS); ?= --条件赋值,只有变量尚未被赋值的情况下,才能将?=后边的值赋给变量; patsubst --模式替换,引用格式:$(patsubst A,B,(VAR)), VAR表示变量,下同,例如:$(patsubst %.c %.o, a.c,b.c); wildcard --通用符,引用格式如:$(wildcard *.c),当前路径下的所有.c结尾的文件; += --追加赋值,VAR定义时给一个基本值,+=就在原来的变量基础上增加一 个赋值,注意不是覆盖; % --模式字符,例如:%.c 表示后缀为.c模式的文件; ifeq、ifneq --条件判断关键字; ifdef、ifndef --条件判断关键字; // + --命令行前使用+,表示; subset --字符串替换,例如:$(subst,e,E,feet),结果为:fEEt; filter --过滤函数,例如:$(filter %.c %.s, $(VAR)),返回VAR中所有后缀为.c,.s的文件; sort --将字符串升序排列,并去掉重复单词; word --取单词函数,$(word 1, text),取text的第1个单词; wordlist --取字符串函数,$(word 1,5, text)表示取text的第1个到第5个单词字串; words --统计字符串中单词数目; firstword --取字符串的第一个单词,lastword同理取最后一个单词; dir --取目录,包含指定文件的路径目录; basename --取前缀函数,例如 $(basename src/foo.c),返回值为src/foo; foreach --循环执行; call --实现用户自定义函数的引用,$(call 函数,参数1,参数2,...); @echo --在界面上输出build信息; eval --比较复杂,没看懂,构造一个依赖关系链,其主要功能是根据参 数关系、结构,对它们进行替换展开; shell --大致功能是将shell的参数放入shell环境中执行并返回结果; error --$(error TEXT...),返回错误信息并退出执行; MAKECMDGOALS -(用户输入的)命令行参数; $@ -表示规则的目标文件名,一般与改符号上文中的文件相对应,例如前边出现.C,可能默认就是对应的.O文件
下面展示一些 内联代码片
。
# 强制性保证GIT repository存在,由于于PX4依赖于其子模块, # 所以必须防止在缺少子模块的情况下编译,从而有了此处的强制检查 # ifeq...endif为条件判断 ifeq ($(wildcard .git),) $(error YOU HAVE TO USE GIT TO DOWNLOAD THIS REPOSITORY. ABORTING.) endif PS:$(wildcard .git)用来获取工作路径下所有后缀为.git的文件,执行GIT检查 # explicity set default build target all: px4_fmu-v2_default # 明确定义一个空格,使他在之后的编译过程中容易被识别出来 space := $(subst ,, ) PS:subset --字符串替换,例如:$(subst,e,E,feet),结果为:fEEt; # 传递的第一个参数是主目标 FIRST_ARG := $(firstword $(MAKECMDGOALS)) #ps:firstword --取字符串的第一个单词,lastword同理取最后一个单词; #余下的参数是传输给子路径下的cmake产生的makefile的 ARGS := $(wordlist 2,$(words $(MAKECMDGOALS)),$(MAKECMDGOALS)) #words --统计字符串中单词数目; #wordlist --取字符串函数,$(word 1,5, text)表示取text的第1个到第5个单词字串; # Get -j or --jobs argument as suggested in: # https://stackoverflow.com/a/33616144/8548472 MAKE_PID := $(shell echo $$PPID) j := $(shell ps T | sed -n 's|.*$(MAKE_PID).*$(MAKE).* \(-j\|--jobs\) *\([0-9][0-9]*\).*|\2|p') # Default j for clang-tidy j_clang_tidy := $(or $(j),4) NINJA_BIN := ninja ifndef NO_NINJA_BUILD NINJA_BUILD := $(shell $(NINJA_BIN) --version 2>/dev/null) ifndef NINJA_BUILD NINJA_BIN := ninja-build NINJA_BUILD := $(shell $(NINJA_BIN) --version 2>/dev/null) endif endif ifdef NINJA_BUILD PX4_CMAKE_GENERATOR := Ninja PX4_MAKE := $(NINJA_BIN) ifdef VERBOSE PX4_MAKE_ARGS := -v else PX4_MAKE_ARGS := endif # Only override ninja default if -j is set. ifneq ($(j),) PX4_MAKE_ARGS := $(PX4_MAKE_ARGS) -j$(j) endif else ifdef SYSTEMROOT # Windows PX4_CMAKE_GENERATOR := "MSYS\ Makefiles" else PX4_CMAKE_GENERATOR := "Unix\ Makefiles" endif # For non-ninja builds we default to -j4 j := $(or $(j),4) PX4_MAKE = $(MAKE) PX4_MAKE_ARGS = -j$(j) --no-print-directory endif SRC_DIR := $(shell dirname "$(realpath $(lastword $(MAKEFILE_LIST)))") # check if replay env variable is set & set build dir accordingly ifdef replay BUILD_DIR_SUFFIX := _replay else BUILD_DIR_SUFFIX := endif # additional config parameters passed to cmake ifdef EXTERNAL_MODULES_LOCATION CMAKE_ARGS += -DEXTERNAL_MODULES_LOCATION:STRING=$(EXTERNAL_MODULES_LOCATION) endif ifdef PX4_CMAKE_BUILD_TYPE CMAKE_ARGS += -DCMAKE_BUILD_TYPE=${PX4_CMAKE_BUILD_TYPE} else # Address Sanitizer ifdef PX4_ASAN CMAKE_ARGS += -DCMAKE_BUILD_TYPE=AddressSanitizer endif # Memory Sanitizer ifdef PX4_MSAN CMAKE_ARGS += -DCMAKE_BUILD_TYPE=MemorySanitizer endif # Thread Sanitizer ifdef PX4_TSAN CMAKE_ARGS += -DCMAKE_BUILD_TYPE=ThreadSanitizer endif # Undefined Behavior Sanitizer ifdef PX4_UBSAN CMAKE_ARGS += -DCMAKE_BUILD_TYPE=UndefinedBehaviorSanitizer endif endif # Pick up specific Python path if set ifdef PYTHON_EXECUTABLE CMAKE_ARGS += -DPYTHON_EXECUTABLE=${PYTHON_EXECUTABLE} endif # Functions # -------------------------------------------------------------------- # describe how to build a cmake config define cmake-build @$(eval BUILD_DIR = "$(SRC_DIR)/build/$(1)") @# check if the desired cmake configuration matches the cache then CMAKE_CACHE_CHECK stays empty @$(call cmake-cache-check) @# make sure to start from scratch when switching from GNU Make to Ninja @if [ $(PX4_CMAKE_GENERATOR) = "Ninja" ] && [ -e $(BUILD_DIR)/Makefile ]; then rm -rf $(BUILD_DIR); fi @# only excplicitly configure the first build, if cache file already exists the makefile will rerun cmake automatically if necessary @if [ ! -e $(BUILD_DIR)/CMakeCache.txt ] || [ $(CMAKE_CACHE_CHECK) ]; then \ mkdir -p $(BUILD_DIR) \ && cd $(BUILD_DIR) \ && cmake "$(SRC_DIR)" -G"$(PX4_CMAKE_GENERATOR)" $(CMAKE_ARGS) \ || (rm -rf $(BUILD_DIR)); \ fi @# run the build for the specified target @cmake --build $(BUILD_DIR) -- $(PX4_MAKE_ARGS) $(ARGS) endef # check if the options we want to build with in CMAKE_ARGS match the ones which are already configured in the cache inside BUILD_DIR define cmake-cache-check @# change to build folder which fails if it doesn't exist and CACHED_CMAKE_OPTIONS stays empty @# fetch all previously configured and cached options from the build folder and transform them into the OPTION=VALUE format without type (e.g. :BOOL) @$(eval CACHED_CMAKE_OPTIONS = $(shell cd $(BUILD_DIR) 2>/dev/null && cmake -L 2>/dev/null | sed -n 's|\([^[:blank:]]*\):[^[:blank:]]*\(=[^[:blank:]]*\)|\1\2|gp' )) @# transform the options in CMAKE_ARGS into the OPTION=VALUE format without -D @$(eval DESIRED_CMAKE_OPTIONS = $(shell echo $(CMAKE_ARGS) | sed -n 's|-D\([^[:blank:]]*=[^[:blank:]]*\)|\1|gp' )) @# find each currently desired option in the already cached ones making sure the complete configured string value is the same @$(eval VERIFIED_CMAKE_OPTIONS = $(foreach option,$(DESIRED_CMAKE_OPTIONS),$(strip $(findstring $(option)$(space),$(CACHED_CMAKE_OPTIONS))))) @# if the complete list of desired options is found in the list of verified options we don't need to reconfigure and CMAKE_CACHE_CHECK stays empty @$(eval CMAKE_CACHE_CHECK = $(if $(findstring $(DESIRED_CMAKE_OPTIONS),$(VERIFIED_CMAKE_OPTIONS)),,y)) endef COLOR_BLUE = \033[0;94m NO_COLOR = \033[m define colorecho +@echo -e '${COLOR_BLUE}${1} ${NO_COLOR}' endef # Get a list of all config targets boards/*/*.cmake ALL_CONFIG_TARGETS := $(shell find boards -maxdepth 3 -mindepth 3 ! -name '*common*' ! -name '*sdflight*' -name '*.cmake' -print | sed -e 's|boards\/||' | sed -e 's|\.cmake||' | sed -e 's|\/|_|g' | sort) # ADD CONFIGS HERE # -------------------------------------------------------------------- # Do not put any spaces between function arguments. # All targets. $(ALL_CONFIG_TARGETS): @$(eval PX4_CONFIG = $@) @$(eval CMAKE_ARGS += -DCONFIG=$(PX4_CONFIG)) @$(call cmake-build,$(PX4_CONFIG)$(BUILD_DIR_SUFFIX)) # Filter for only default targets to allow omiting the "_default" postfix CONFIG_TARGETS_DEFAULT := $(patsubst %_default,%,$(filter %_default,$(ALL_CONFIG_TARGETS))) $(CONFIG_TARGETS_DEFAULT): @$(eval PX4_CONFIG = $@_default) @$(eval CMAKE_ARGS += -DCONFIG=$(PX4_CONFIG)) @$(call cmake-build,$(PX4_CONFIG)$(BUILD_DIR_SUFFIX)) all_config_targets: $(ALL_CONFIG_TARGETS) all_default_targets: $(CONFIG_TARGETS_DEFAULT) # board reorganization deprecation warnings (2018-11-22) define deprecation_warning $(warning $(1) has been deprecated and will be removed, please use $(2)!) endef # All targets with just dependencies but no recipe must either be marked as phony (or have the special @: as recipe). .PHONY: all px4_sitl_default all_config_targets all_default_targets # Multi- config targets. eagle_default: atlflight_eagle_default atlflight_eagle_qurt eagle_rtps: atlflight_eagle_rtps atlflight_eagle_qurt-rtps excelsior_default: atlflight_excelsior_default atlflight_excelsior_qurt excelsior_rtps: atlflight_excelsior_rtps atlflight_excelsior_qurt-rtps .PHONY: eagle_default eagle_rtps .PHONY: excelsior_default excelsior_rtps # Other targets # -------------------------------------------------------------------- .PHONY: qgc_firmware px4fmu_firmware misc_qgc_extra_firmware check_rtps # QGroundControl flashable NuttX firmware qgc_firmware: px4fmu_firmware misc_qgc_extra_firmware # px4fmu NuttX firmware px4fmu_firmware: \ check_px4_io-v2_default \ check_px4_fmu-v2_default \ check_px4_fmu-v3_default \ check_px4_fmu-v4_default \ check_px4_fmu-v4pro_default \ check_px4_fmu-v5_default \ check_px4_fmu-v5x_default \ sizes misc_qgc_extra_firmware: \ check_nxp_fmuk66-v3_default \ check_nxp_fmurt1062-v1_default \ check_intel_aerofc-v1_default \ check_mro_x21_default \ check_bitcraze_crazyflie_default \ check_airmind_mindpx-v2_default \ check_px4_fmu-v2_lpe \ sizes # builds with RTPS check_rtps: \ check_px4_fmu-v3_rtps \ check_px4_fmu-v4_rtps \ check_px4_fmu-v4pro_rtps \ check_px4_sitl_rtps \ sizes .PHONY: sizes check quick_check check_rtps uorb_graphs sizes: @-find build -name *.elf -type f | xargs size 2> /dev/null || : # All default targets that don't require a special build environment check: check_px4_sitl_default px4fmu_firmware misc_qgc_extra_firmware tests check_format # quick_check builds a single nuttx and SITL target, runs testing, and checks the style quick_check: check_px4_sitl_test check_px4_fmu-v5_default tests check_format check_%: @echo $(call colorecho,'Building' $(subst check_,,$@)) @$(MAKE) --no-print-directory $(subst check_,,$@) @echo uorb_graphs: @./Tools/uorb_graph/create_from_startupscript.sh @./Tools/uorb_graph/create.py --src-path src --exclude-path src/examples --file Tools/uorb_graph/graph_full @$(MAKE) --no-print-directory px4_fmu-v2_default uorb_graph @$(MAKE) --no-print-directory px4_fmu-v4_default uorb_graph @$(MAKE) --no-print-directory px4_sitl_default uorb_graph .PHONY: coverity_scan coverity_scan: px4_sitl_default # Documentation # -------------------------------------------------------------------- .PHONY: parameters_metadata airframe_metadata module_documentation px4_metadata doxygen parameters_metadata: @$(MAKE) --no-print-directory px4_sitl_default metadata_parameters airframe_metadata: @$(MAKE) --no-print-directory px4_sitl_default metadata_airframes module_documentation: @$(MAKE) --no-print-directory px4_sitl_default metadata_module_documentation px4_metadata: parameters_metadata airframe_metadata module_documentation doxygen: @mkdir -p "$(SRC_DIR)"/build/doxygen @cd "$(SRC_DIR)"/build/doxygen && cmake "$(SRC_DIR)" $(CMAKE_ARGS) -G"$(PX4_CMAKE_GENERATOR)" -DCONFIG=px4_sitl_default -DBUILD_DOXYGEN=ON @$(PX4_MAKE) -C "$(SRC_DIR)"/build/doxygen @touch "$(SRC_DIR)"/build/doxygen/Documentation/.nojekyll # Astyle # -------------------------------------------------------------------- .PHONY: check_format format check_format: $(call colorecho,'Checking formatting with astyle') @"$(SRC_DIR)"/Tools/astyle/check_code_style_all.sh @cd "$(SRC_DIR)" && git diff --check format: $(call colorecho,'Formatting with astyle') @"$(SRC_DIR)"/Tools/astyle/check_code_style_all.sh --fix # Testing # -------------------------------------------------------------------- .PHONY: tests tests_coverage tests_mission tests_mission_coverage tests_offboard tests_avoidance .PHONY: rostest python_coverage tests: $(eval CMAKE_ARGS += -DCONFIG=px4_sitl_test) $(eval CMAKE_ARGS += -DTESTFILTER=$(TESTFILTER)) $(eval ARGS += test_results) $(eval ASAN_OPTIONS += color=always:check_initialization_order=1:detect_stack_use_after_return=1) $(eval UBSAN_OPTIONS += color=always) $(call cmake-build,px4_sitl_test) tests_coverage: @$(MAKE) clean @$(MAKE) --no-print-directory px4_sitl_default test_coverage_genhtml PX4_CMAKE_BUILD_TYPE=Coverage @echo "Open "$(SRC_DIR)"/build/px4_sitl_default/coverage-html/index.html to see coverage" rostest: px4_sitl_default @$(MAKE) --no-print-directory px4_sitl_default sitl_gazebo tests_integration: px4_sitl_default @$(MAKE) --no-print-directory px4_sitl_default sitl_gazebo @$(MAKE) --no-print-directory px4_sitl_default mavsdk_tests @"$(SRC_DIR)"/test/mavsdk_tests/mavsdk_test_runner.py --speed-factor 20 test/mavsdk_tests/configs/sitl.json tests_integration_coverage: @$(MAKE) clean @$(MAKE) --no-print-directory px4_sitl_default PX4_CMAKE_BUILD_TYPE=Coverage @$(MAKE) --no-print-directory px4_sitl_default sitl_gazebo @$(MAKE) --no-print-directory px4_sitl_default mavsdk_tests @"$(SRC_DIR)"/test/mavsdk_tests/mavsdk_test_runner.py --speed-factor 20 test/mavsdk_tests/configs/sitl.json @mkdir -p coverage @lcov --directory build/px4_sitl_default --base-directory build/px4_sitl_default --gcov-tool gcov --capture -o coverage/lcov.info tests_mission: rostest @"$(SRC_DIR)"/test/rostest_px4_run.sh mavros_posix_tests_missions.test rostest_run: px4_sitl_default @$(MAKE) --no-print-directory px4_sitl_default sitl_gazebo @"$(SRC_DIR)"/test/rostest_px4_run.sh $(TEST_FILE) mission:=$(TEST_MISSION) vehicle:=$(TEST_VEHICLE) tests_mission_coverage: @$(MAKE) clean @$(MAKE) --no-print-directory px4_sitl_default PX4_CMAKE_BUILD_TYPE=Coverage @$(MAKE) --no-print-directory px4_sitl_default sitl_gazebo PX4_CMAKE_BUILD_TYPE=Coverage @"$(SRC_DIR)"/test/rostest_px4_run.sh mavros_posix_test_mission.test mission:=VTOL_mission_1 vehicle:=standard_vtol @$(MAKE) --no-print-directory px4_sitl_default generate_coverage tests_offboard: rostest @"$(SRC_DIR)"/test/rostest_px4_run.sh mavros_posix_tests_offboard_attctl.test @"$(SRC_DIR)"/test/rostest_px4_run.sh mavros_posix_tests_offboard_posctl.test @"$(SRC_DIR)"/test/rostest_px4_run.sh mavros_posix_tests_offboard_rpyrt_ctl.test tests_avoidance: rostest @"$(SRC_DIR)"/test/rostest_avoidance_run.sh mavros_posix_test_avoidance.test @"$(SRC_DIR)"/test/rostest_avoidance_run.sh mavros_posix_test_safe_landing.test python_coverage: @mkdir -p "$(SRC_DIR)"/build/python_coverage @cd "$(SRC_DIR)"/build/python_coverage && cmake "$(SRC_DIR)" $(CMAKE_ARGS) -G"$(PX4_CMAKE_GENERATOR)" -DCONFIG=px4_sitl_default -DPYTHON_COVERAGE=ON @$(PX4_MAKE) -C "$(SRC_DIR)"/build/python_coverage @$(PX4_MAKE) -C "$(SRC_DIR)"/build/python_coverage metadata_airframes @$(PX4_MAKE) -C "$(SRC_DIR)"/build/python_coverage metadata_parameters #@$(PX4_MAKE) -C "$(SRC_DIR)"/build/python_coverage module_documentation # TODO: fix within coverage.py @coverage combine `find . -name .coverage\*` @coverage report -m # static analyzers (scan-build, clang-tidy, cppcheck) # -------------------------------------------------------------------- .PHONY: scan-build px4_sitl_default-clang clang-tidy clang-tidy-fix clang-tidy-quiet .PHONY: cppcheck shellcheck_all validate_module_configs scan-build: @export CCC_CC=clang @export CCC_CXX=clang++ @rm -rf "$(SRC_DIR)"/build/px4_sitl_default-scan-build @rm -rf "$(SRC_DIR)"/build/scan-build/report_latest @mkdir -p "$(SRC_DIR)"/build/px4_sitl_default-scan-build @cd "$(SRC_DIR)"/build/px4_sitl_default-scan-build && scan-build cmake "$(SRC_DIR)" -GNinja -DCONFIG=px4_sitl_default @scan-build -o "$(SRC_DIR)"/build/scan-build cmake --build "$(SRC_DIR)"/build/px4_sitl_default-scan-build @find "$(SRC_DIR)"/build/scan-build -maxdepth 1 -mindepth 1 -type d -exec cp -r "{}" "$(SRC_DIR)"/build/scan-build/report_latest \; px4_sitl_default-clang: @mkdir -p "$(SRC_DIR)"/build/px4_sitl_default-clang @cd "$(SRC_DIR)"/build/px4_sitl_default-clang && cmake "$(SRC_DIR)" $(CMAKE_ARGS) -G"$(PX4_CMAKE_GENERATOR)" -DCONFIG=px4_sitl_default -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ @$(PX4_MAKE) -C "$(SRC_DIR)"/build/px4_sitl_default-clang clang-tidy: px4_sitl_default-clang @cd "$(SRC_DIR)"/build/px4_sitl_default-clang && "$(SRC_DIR)"/Tools/run-clang-tidy.py -header-filter=".*\.hpp" -j$(j_clang_tidy) -p . # to automatically fix a single check at a time, eg modernize-redundant-void-arg # % run-clang-tidy-4.0.py -fix -j4 -checks=-\*,modernize-redundant-void-arg -p . clang-tidy-fix: px4_sitl_default-clang @cd "$(SRC_DIR)"/build/px4_sitl_default-clang && "$(SRC_DIR)"/Tools/run-clang-tidy.py -header-filter=".*\.hpp" -j$(j_clang_tidy) -fix -p . # modified version of run-clang-tidy.py to return error codes and only output relevant results clang-tidy-quiet: px4_sitl_default-clang @cd "$(SRC_DIR)"/build/px4_sitl_default-clang && "$(SRC_DIR)"/Tools/run-clang-tidy.py -header-filter=".*\.hpp" -j$(j_clang_tidy) -p . # TODO: Fix cppcheck errors then try --enable=warning,performance,portability,style,unusedFunction or --enable=all cppcheck: px4_sitl_default @mkdir -p "$(SRC_DIR)"/build/cppcheck @cppcheck -i"$(SRC_DIR)"/src/examples --enable=performance --std=c++14 --std=c99 --std=posix --project="$(SRC_DIR)"/build/px4_sitl_default/compile_commands.json --xml-version=2 2> "$(SRC_DIR)"/build/cppcheck/cppcheck-result.xml > /dev/null @cppcheck-htmlreport --source-encoding=ascii --file="$(SRC_DIR)"/build/cppcheck/cppcheck-result.xml --report-dir="$(SRC_DIR)"/build/cppcheck --source-dir="$(SRC_DIR)"/src/ shellcheck_all: @"$(SRC_DIR)"/Tools/run-shellcheck.sh "$(SRC_DIR)"/ROMFS/px4fmu_common/ @make px4_fmu-v5_default shellcheck validate_module_configs: @find "$(SRC_DIR)"/src/modules "$(SRC_DIR)"/src/drivers "$(SRC_DIR)"/src/lib -name *.yaml -type f -print0 | xargs -0 "$(SRC_DIR)"/Tools/validate_yaml.py --schema-file "$(SRC_DIR)"/validation/module_schema.yaml # Cleanup # -------------------------------------------------------------------- .PHONY: clean submodulesclean submodulesupdate gazeboclean distclean clean: @rm -rf "$(SRC_DIR)"/build submodulesclean: @git submodule foreach --quiet --recursive git clean -ff -x -d @git submodule update --quiet --init --recursive --force || true @git submodule sync --recursive @git submodule update --init --recursive --force submodulesupdate: @git submodule update --quiet --init --recursive || true @git submodule sync --recursive @git submodule update --init --recursive gazeboclean: @rm -rf ~/.gazebo/* distclean: gazeboclean @git submodule deinit -f . @git clean -ff -x -d -e ".project" -e ".cproject" -e ".idea" -e ".settings" -e ".vscode" # Help / Error # -------------------------------------------------------------------- # All other targets are handled by PX4_MAKE. Add a rule here to avoid printing an error. %: $(if $(filter $(FIRST_ARG),$@), \ $(error "Make target $@ not found. It either does not exist or $@ cannot be the first argument. Use '$(MAKE) help|list_config_targets' to get a list of all possible [configuration] targets."),@#) # Print a list of non-config targets (based on http://stackoverflow.com/a/26339924/1487069) help: @echo "Usage: $(MAKE) <target>" @echo "Where <target> is one of:" @$(MAKE) -pRrq -f $(lastword $(MAKEFILE_LIST)) : 2>/dev/null | \ awk -v RS= -F: '/^# File/,/^# Finished Make data base/ {if ($$1 !~ "^[#.]") {print $$1}}' | sort | \ egrep -v -e '^[^[:alnum:]]' -e '^($(subst $(space),|,$(ALL_CONFIG_TARGETS)))$$' -e '_default$$' -e '^(posix|eagle|Makefile)' @echo @echo "Or, $(MAKE) <config_target> [<make_target(s)>]" @echo "Use '$(MAKE) list_config_targets' for a list of configuration targets." # Print a list of all config targets. list_config_targets: @for targ in $(patsubst %_default,%[_default],$(ALL_CONFIG_TARGETS)); do echo $$targ; done check_nuttx : $(call make_list,nuttx) \ sizes check_linux : $(call make_list,linux) \ sizes check_px4: $(call make_list,nuttx,"px4") \ sizes check_nxp: $(call make_list,nuttx,"nxp") \ sizes
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