312 lines
12 KiB
Makefile
312 lines
12 KiB
Makefile
#
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# Main Project Makefile
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# This Makefile is included directly from the user project Makefile in order to call the component.mk
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# makefiles of all components (in a separate make process) to build all the libraries, then links them
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# together into the final file. If so, PWD is the project dir (we assume).
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#
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#
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# This makefile requires the environment variable IDF_PATH to be set to the top-level esp-idf directory
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# where this file is located.
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#
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.PHONY: build-components menuconfig defconfig all build clean all_binaries
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all: all_binaries
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# see below for recipe of 'all' target
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#
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# # other components will add dependencies to 'all_binaries'. The
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# reason all_binaries is used instead of 'all' is so that the flash
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# target can build everything without triggering the per-component "to
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# flash..." output targets.)
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help:
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@echo "Welcome to Espressif IDF build system. Some useful make targets:"
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@echo ""
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@echo "make menuconfig - Configure IDF project"
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@echo "make defconfig - Set defaults for all new configuration options"
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@echo ""
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@echo "make all - Build app, bootloader, partition table"
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@echo "make flash - Flash all components to a fresh chip"
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@echo "make clean - Remove all build output"
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@echo ""
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@echo "make app - Build just the app"
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@echo "make app-flash - Flash just the app"
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@echo "make app-clean - Clean just the app"
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@echo ""
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@echo "See also 'make bootloader', 'make bootloader-flash', 'make bootloader-clean', "
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@echo "'make partition_table', etc, etc."
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# disable built-in make rules, makes debugging saner
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MAKEFLAGS_OLD := $(MAKEFLAGS)
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MAKEFLAGS +=-rR
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# Figure out PROJECT_PATH if not set
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ifeq ("$(PROJECT_PATH)","")
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#The path to the project: we assume the Makefile including this file resides
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#in the root of that directory.
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PROJECT_PATH := $(abspath $(dir $(firstword $(MAKEFILE_LIST))))
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export PROJECT_PATH
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endif
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#The directory where we put all objects/libraries/binaries. The project Makefile can
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#configure this if needed.
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BUILD_DIR_BASE ?= $(PROJECT_PATH)/build
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export BUILD_DIR_BASE
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#Component directories. These directories are searched for components.
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#The project Makefile can override these component dirs, or define extra component directories.
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COMPONENT_DIRS ?= $(PROJECT_PATH)/components $(EXTRA_COMPONENT_DIRS) $(IDF_PATH)/components
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export COMPONENT_DIRS
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#The project Makefile can define a list of components, but if it does not do this we just take
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#all available components in the component dirs.
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ifeq ("$(COMPONENTS)","")
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#Find all component names. The component names are the same as the
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#directories they're in, so /bla/components/mycomponent/ -> mycomponent. We later use
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#the COMPONENT_DIRS bit to find back the component path.
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COMPONENTS := $(foreach dir,$(COMPONENT_DIRS),$(wildcard $(dir)/*))
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COMPONENTS := $(sort $(foreach comp,$(COMPONENTS),$(lastword $(subst /, ,$(comp)))))
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endif
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export COMPONENTS
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#Sources default to only "main"
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SRCDIRS ?= main
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#Here, we resolve and add all the components and source paths into absolute paths.
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#If a component exists in multiple COMPONENT_DIRS, we take the first match.
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#WARNING: These directories paths must be generated WITHOUT a trailing / so we
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#can use $(notdir x) to get the component name.
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COMPONENT_PATHS := $(foreach comp,$(COMPONENTS),$(firstword $(foreach dir,$(COMPONENT_DIRS),$(wildcard $(dir)/$(comp)))))
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COMPONENT_PATHS += $(abspath $(SRCDIRS))
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#A component is buildable if it has a component.mk makefile; we assume that a
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# 'make -C $(component dir) -f component.mk build' results in a lib$(componentname).a
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COMPONENT_PATHS_BUILDABLE := $(foreach cp,$(COMPONENT_PATHS),$(if $(wildcard $(cp)/component.mk),$(cp)))
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# Assemble global list of include dirs (COMPONENT_INCLUDES), and
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# LDFLAGS args (COMPONENT_LDFLAGS) supplied by each component.
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COMPONENT_INCLUDES :=
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COMPONENT_LDFLAGS :=
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#
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# Also add any inter-component dependencies for each component.
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# Extract a variable from a child make process
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#
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# $(1) - path to directory to invoke make in
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# $(2) - name of variable to print via the get_variable target (passed in GET_VARIABLE)
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#
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# needs 'sed' processing of stdout because make sometimes echoes other stuff on stdout,
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# even if asked not to.
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#
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# Debugging this? Replace $(shell with $(error and you'll see the full command as-run.
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define GetVariable
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$(shell "$(MAKE)" -s --no-print-directory -C $(1) -f component.mk get_variable PROJECT_PATH=$(PROJECT_PATH) GET_VARIABLE=$(2) IS_BOOTLOADER_BUILD=$(IS_BOOTLOADER_BUILD) | sed -En "s/^$(2)=(.+)/\1/p" )
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endef
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COMPONENT_INCLUDES := $(abspath $(foreach comp,$(COMPONENT_PATHS_BUILDABLE),$(addprefix $(comp)/, \
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$(call GetVariable,$(comp),COMPONENT_ADD_INCLUDEDIRS))))
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#Also add project include path, for sdk includes
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COMPONENT_INCLUDES += $(abspath $(BUILD_DIR_BASE)/include/)
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export COMPONENT_INCLUDES
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#COMPONENT_LDFLAGS has a list of all flags that are needed to link the components together. It's collected
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#in the same way as COMPONENT_INCLUDES is.
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COMPONENT_LDFLAGS := $(foreach comp,$(COMPONENT_PATHS_BUILDABLE), \
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$(call GetVariable,$(comp),COMPONENT_ADD_LDFLAGS))
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export COMPONENT_LDFLAGS
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# Generate component dependency targets from dependencies lists
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# each component gains a target of its own <name>-build with dependencies
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# of the names of any other components (-build) that need building first
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#
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# the actual targets (that invoke submakes) are generated below by
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# GenerateComponentTarget macro.
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define GenerateComponentDependencies
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# $(1) = component path
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.PHONY: $$(notdir $(1))
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$$(notdir $(1))-build: $(addsuffix -build,$(call GetVariable,$(1),COMPONENT_DEPENDS))
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endef
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$(foreach comp,$(COMPONENT_PATHS_BUILDABLE), $(eval $(call GenerateComponentDependencies,$(comp))))
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#Make sure submakes can also use this.
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export PROJECT_PATH
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#Include functionality common to both project & component
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-include $(IDF_PATH)/make/common.mk
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all:
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ifdef CONFIG_SECURE_BOOTLOADER_ENABLED
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@echo "(Secure boot enabled, so bootloader not flashed automatically. See 'make bootloader' output)"
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@echo "To flash app & partition table, run 'make flash' or:"
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else
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@echo "To flash all build output, run 'make flash' or:"
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endif
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@echo $(ESPTOOLPY_WRITE_FLASH) $(ESPTOOL_ALL_FLASH_ARGS)
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# Set default LDFLAGS
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LDFLAGS ?= -nostdlib \
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-L$(IDF_PATH)/lib \
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-L$(IDF_PATH)/ld \
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$(addprefix -L$(BUILD_DIR_BASE)/,$(COMPONENTS) $(SRCDIRS)) \
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-u call_user_start_cpu0 \
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$(EXTRA_LDFLAGS) \
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-Wl,--gc-sections \
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-Wl,-static \
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-Wl,--start-group \
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$(COMPONENT_LDFLAGS) \
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-lgcc \
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-Wl,--end-group \
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-Wl,-EL
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# Set default CPPFLAGS, CFLAGS, CXXFLAGS
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# These are exported so that components can use them when compiling.
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# If you need your component to add CFLAGS/etc for it's own source compilation only, set CFLAGS += in your component's Makefile.
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# If you need your component to add CFLAGS/etc globally for all source
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# files, set CFLAGS += in your component's Makefile.projbuild
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# If you need to set CFLAGS/CPPFLAGS/CXXFLAGS at project level, set them in application Makefile
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# before including project.mk. Default flags will be added before the ones provided in application Makefile.
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# CPPFLAGS used by C preprocessor
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# If any flags are defined in application Makefile, add them at the end.
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CPPFLAGS := -DESP_PLATFORM $(CPPFLAGS)
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# Warnings-related flags relevant both for C and C++
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COMMON_WARNING_FLAGS = -Wall -Werror \
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-Wno-error=unused-function \
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-Wno-error=unused-but-set-variable \
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-Wno-error=unused-variable
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# Flags which control code generation and dependency generation, both for C and C++
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COMMON_FLAGS = \
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-ffunction-sections -fdata-sections \
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-fstrict-volatile-bitfields \
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-mlongcalls \
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-nostdlib \
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-MMD -MP
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# Optimization flags are set based on menuconfig choice
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ifneq ("$(CONFIG_OPTIMIZATION_LEVEL_RELEASE)","")
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OPTIMIZATION_FLAGS = -Os
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CPPFLAGS += -DNDEBUG
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else
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OPTIMIZATION_FLAGS = -Og
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endif
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# Enable generation of debugging symbols
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OPTIMIZATION_FLAGS += -ggdb
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# List of flags to pass to C compiler
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# If any flags are defined in application Makefile, add them at the end.
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CFLAGS := $(strip \
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-std=gnu99 \
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$(OPTIMIZATION_FLAGS) \
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$(COMMON_FLAGS) \
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$(COMMON_WARNING_FLAGS) \
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$(CFLAGS))
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# List of flags to pass to C++ compiler
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# If any flags are defined in application Makefile, add them at the end.
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CXXFLAGS := $(strip \
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-std=gnu++11 \
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-fno-exceptions \
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-fno-rtti \
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$(OPTIMIZATION_FLAGS) \
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$(COMMON_FLAGS) \
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$(COMMON_WARNING_FLAGS) \
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$(CXXFLAGS))
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export CFLAGS CPPFLAGS CXXFLAGS
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#Set host compiler and binutils
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HOSTCC := $(CC)
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HOSTLD := $(LD)
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HOSTAR := $(AR)
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HOSTOBJCOPY := $(OBJCOPY)
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export HOSTCC HOSTLD HOSTAR HOSTOBJCOPY
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#Set target compiler. Defaults to whatever the user has
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#configured as prefix + yer olde gcc commands
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CC := $(call dequote,$(CONFIG_TOOLPREFIX))gcc
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CXX := $(call dequote,$(CONFIG_TOOLPREFIX))c++
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LD := $(call dequote,$(CONFIG_TOOLPREFIX))ld
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AR := $(call dequote,$(CONFIG_TOOLPREFIX))ar
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OBJCOPY := $(call dequote,$(CONFIG_TOOLPREFIX))objcopy
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export CC CXX LD AR OBJCOPY
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PYTHON=$(call dequote,$(CONFIG_PYTHON))
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# the app is the main executable built by the project
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APP_ELF:=$(BUILD_DIR_BASE)/$(PROJECT_NAME).elf
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APP_MAP:=$(APP_ELF:.elf=.map)
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APP_BIN:=$(APP_ELF:.elf=.bin)
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# Include any Makefile.projbuild file letting components add
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# configuration at the project level
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define includeProjBuildMakefile
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$(if $(V),$(if $(wildcard $(1)/Makefile.projbuild),$(info including $(1)/Makefile.projbuild...)))
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COMPONENT_PATH := $(1)
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-include $(1)/Makefile.projbuild
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endef
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$(foreach componentpath,$(COMPONENT_PATHS),$(eval $(call includeProjBuildMakefile,$(componentpath))))
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# once we know component paths, we can include the config
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include $(IDF_PATH)/make/project_config.mk
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# A "component" library is any library in the LDFLAGS where
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# the name of the library is also a name of the component
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APP_LIBRARIES = $(patsubst -l%,%,$(filter -l%,$(LDFLAGS)))
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COMPONENT_LIBRARIES = $(filter $(notdir $(COMPONENT_PATHS_BUILDABLE)),$(APP_LIBRARIES))
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# ELF depends on the library archive files for COMPONENT_LIBRARIES
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# the rules to build these are emitted as part of GenerateComponentTarget below
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$(APP_ELF): $(foreach libcomp,$(COMPONENT_LIBRARIES),$(BUILD_DIR_BASE)/$(libcomp)/lib$(libcomp).a)
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$(summary) LD $(notdir $@)
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$(Q) $(CC) $(LDFLAGS) -o $@ -Wl,-Map=$(APP_MAP)
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# Generation of $(APP_BIN) from $(APP_ELF) is added by the esptool
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# component's Makefile.projbuild
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app: $(APP_BIN)
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@echo "App built. Default flash app command is:"
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@echo $(ESPTOOLPY_WRITE_FLASH) $(CONFIG_APP_OFFSET) $(APP_BIN)
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all_binaries: $(APP_BIN)
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$(BUILD_DIR_BASE):
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mkdir -p $(BUILD_DIR_BASE)
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define GenerateComponentPhonyTarget
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# $(1) - path to component dir
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# $(2) - target to generate (build, clean)
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.PHONY: $(notdir $(1))-$(2)
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$(notdir $(1))-$(2): | $(BUILD_DIR_BASE)/$(notdir $(1))
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$(Q) +$(MAKE) -C $(BUILD_DIR_BASE)/$(notdir $(1)) -f $(1)/component.mk COMPONENT_BUILD_DIR=$(BUILD_DIR_BASE)/$(notdir $(1)) $(2)
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endef
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define GenerateComponentTargets
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# $(1) - path to component dir
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$(BUILD_DIR_BASE)/$(notdir $(1)):
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@mkdir -p $(BUILD_DIR_BASE)/$(notdir $(1))
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# tell make it can build any component's library by invoking the recursive -build target
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# (this target exists for all components even ones which don't build libraries, but it's
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# only invoked for the targets whose libraries appear in COMPONENT_LIBRARIES and hence the
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# APP_ELF dependencies.)
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$(BUILD_DIR_BASE)/$(notdir $(1))/lib$(notdir $(1)).a: $(notdir $(1))-build
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$(details) "Target '$$^' responsible for '$$@'" # echo which build target built this file
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endef
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$(foreach component,$(COMPONENT_PATHS_BUILDABLE),$(eval $(call GenerateComponentTargets,$(component))))
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$(foreach component,$(COMPONENT_PATHS_BUILDABLE),$(eval $(call GenerateComponentPhonyTarget,$(component),build)))
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$(foreach component,$(COMPONENT_PATHS_BUILDABLE),$(eval $(call GenerateComponentPhonyTarget,$(component),clean)))
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app-clean: $(addsuffix -clean,$(notdir $(COMPONENT_PATHS_BUILDABLE)))
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$(summary) RM $(APP_ELF)
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$(Q) rm -f $(APP_ELF) $(APP_BIN) $(APP_MAP)
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clean: app-clean
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