136 lines
6.1 KiB
Makefile
136 lines
6.1 KiB
Makefile
# Component common makefile
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#
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# This Makefile gets included in the Makefile of all the components to set the correct include paths etc.
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# PWD is the build directory of the component and the top Makefile is the one in the
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# component source dir.
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#
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# The way the Makefile differentiates between those two is by looking at the environment
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# variable PROJECT_PATH. If this is set (to the basepath of the project), we're building a
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# component and its Makefile has included this makefile. If not, we're building the entire project.
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#
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#
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# This Makefile requires the environment variable IDF_PATH to be set
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# to the top-level directory where ESP-IDF is located (the directory
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# containing this 'make' directory).
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#
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ifeq ("$(PROJECT_PATH)","")
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$(error Make was invoked from $(CURDIR). However please do not run make from the sdk or a component directory; invoke make from the project directory. See the ESP-IDF README for details.)
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endif
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# Find the path to the component
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COMPONENT_PATH := $(abspath $(dir $(firstword $(MAKEFILE_LIST))))
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export COMPONENT_PATH
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include $(IDF_PATH)/make/common.mk
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#Some of these options are overridable by the component's component.mk Makefile
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#Name of the component
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COMPONENT_NAME ?= $(lastword $(subst /, ,$(realpath $(COMPONENT_PATH))))
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#Absolute path of the .a file
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COMPONENT_LIBRARY := lib$(COMPONENT_NAME).a
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#Source dirs a component has. Default to root directory of component.
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COMPONENT_SRCDIRS ?= .
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#Object files which need to be linked into the library
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#By default we take all .c/.S files in the component directory.
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ifeq ("$(COMPONENT_OBJS)", "")
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#Find all source files in all COMPONENT_SRCDIRS
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COMPONENT_OBJS := $(foreach compsrcdir,$(COMPONENT_SRCDIRS),$(patsubst %.c,%.o,$(wildcard $(COMPONENT_PATH)/$(compsrcdir)/*.c)))
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COMPONENT_OBJS += $(foreach compsrcdir,$(COMPONENT_SRCDIRS),$(patsubst %.cpp,%.o,$(wildcard $(COMPONENT_PATH)/$(compsrcdir)/*.cpp)))
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COMPONENT_OBJS += $(foreach compsrcdir,$(COMPONENT_SRCDIRS),$(patsubst %.S,%.o,$(wildcard $(COMPONENT_PATH)/$(compsrcdir)/*.S)))
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#Make relative by removing COMPONENT_PATH from all found object paths
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COMPONENT_OBJS := $(patsubst $(COMPONENT_PATH)/%,%,$(COMPONENT_OBJS))
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endif
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#By default, include only the include/ dir.
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COMPONENT_ADD_INCLUDEDIRS ?= include
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COMPONENT_ADD_LDFLAGS ?= -l$(COMPONENT_NAME)
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#If we're called to compile something, we'll get passed the COMPONENT_INCLUDES
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#variable with all the include dirs from all the components in random order. This
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#means we can accidentally grab a header from another component before grabbing our own.
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#To make sure that does not happen, re-order the includes so ours come first.
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OWN_INCLUDES:=$(abspath $(addprefix $(COMPONENT_PATH)/,$(COMPONENT_ADD_INCLUDEDIRS) $(COMPONENT_PRIV_INCLUDEDIRS)))
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COMPONENT_INCLUDES := $(OWN_INCLUDES) $(filter-out $(OWN_INCLUDES),$(COMPONENT_INCLUDES))
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# macro to generate relative paths inside component_project_vars.mk, whenever possible
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# ie put literal $(IDF_PATH), $(PROJECT_PATH) and $(BUILD_DIR_BASE) into the generated
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# makefiles where possible.
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#
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# This means if directories move (breaking absolute paths), don't need to 'make clean'
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define MakeRelativePath
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$(subst $(IDF_PATH),$$(IDF_PATH),$(subst $(PROJECT_PATH),$$(PROJECT_PATH),$(subst $(BUILD_DIR_BASE),\$$(BUILD_DIR_BASE),$(1))))
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endef
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# This target generates component_project_vars.mk for the
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# component. This is used to take component.mk variables
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# COMPONENT_ADD_INCLUDEDIRS, COMPONENT_ADD_LDFLAGS and
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# COMPONENT_DEPENDS and inject those into the project makefile.
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#
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# The target here has no dependencies, as the parent target in
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# project.mk evaluates dependencies before calling down to here. See
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# GenerateComponentTargets macro in project.mk.
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#
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# If you are thinking of editing the output of this makefile for a
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# component-specific feature, please don't! What you want is a
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# Makefile.projbuild for your component (see docs/build-system.rst for more.)
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component_project_vars.mk::
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$(details) "Building component project variables list $(abspath $@)"
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@echo '# Automatically generated build file. Do not edit.' > $@
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@echo 'COMPONENT_INCLUDES += $(call MakeRelativePath,$(addprefix $(COMPONENT_PATH)/,$(COMPONENT_ADD_INCLUDEDIRS)))' >> $@
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@echo 'COMPONENT_LDFLAGS += $(call MakeRelativePath,$(COMPONENT_ADD_LDFLAGS))' >> $@
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@echo '$(COMPONENT_NAME)-build: $(addsuffix -build,$(COMPONENT_DEPENDS))' >> $@
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#Targets for build/clean. Use builtin recipe if component Makefile
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#hasn't defined its own.
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ifeq ("$(COMPONENT_OWNBUILDTARGET)", "")
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build: $(COMPONENT_LIBRARY)
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@mkdir -p $(COMPONENT_SRCDIRS)
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#Build the archive. We remove the archive first, otherwise ar will get confused if we update
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#an archive when multiple filenames have the same name (src1/test.o and src2/test.o)
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$(COMPONENT_LIBRARY): $(COMPONENT_OBJS)
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$(summary) AR $@
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$(Q) rm -f $@
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$(Q) $(AR) cru $@ $(COMPONENT_OBJS)
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endif
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CLEAN_FILES = $(COMPONENT_LIBRARY) $(COMPONENT_OBJS) $(COMPONENT_OBJS:.o=.d) $(COMPONENT_EXTRA_CLEAN) component_project_vars.mk
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ifeq ("$(COMPONENT_OWNCLEANTARGET)", "")
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clean:
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$(summary) RM $(CLEAN_FILES)
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$(Q) rm -f $(CLEAN_FILES)
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endif
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#Include all dependency files already generated
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-include $(COMPONENT_OBJS:.o=.d)
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#This pattern is generated for each COMPONENT_SRCDIR to compile the files in it.
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define GenerateCompileTargets
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# $(1) - directory containing source files, relative to $(COMPONENT_PATH)
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$(1)/%.o: $$(COMPONENT_PATH)/$(1)/%.c | $(1)
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$$(summary) CC $$@
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$$(Q) $$(CC) $$(CFLAGS) $(CPPFLAGS) $$(addprefix -I ,$$(COMPONENT_INCLUDES)) $$(addprefix -I ,$$(COMPONENT_EXTRA_INCLUDES)) -I$(1) -c $$< -o $$@
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$(1)/%.o: $$(COMPONENT_PATH)/$(1)/%.cpp | $(1)
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$$(summary) CXX $$@
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$$(Q) $$(CXX) $$(CXXFLAGS) $(CPPFLAGS) $$(addprefix -I,$$(COMPONENT_INCLUDES)) $$(addprefix -I,$$(COMPONENT_EXTRA_INCLUDES)) -I$(1) -c $$< -o $$@
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$(1)/%.o: $$(COMPONENT_PATH)/$(1)/%.S | $(1)
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$$(summary) AS $$@
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$$(Q) $$(CC) $$(CFLAGS) $(CPPFLAGS) $$(addprefix -I ,$$(COMPONENT_INCLUDES)) $$(addprefix -I ,$$(COMPONENT_EXTRA_INCLUDES)) -I$(1) -c $$< -o $$@
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# CWD is build dir, create the build subdirectory if it doesn't exist
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$(1):
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@mkdir -p $(1)
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endef
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#Generate all the compile target recipes
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$(foreach srcdir,$(COMPONENT_SRCDIRS), $(eval $(call GenerateCompileTargets,$(srcdir))))
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