esp-idf/components/ulp/component_ulp_common.mk

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# Extra make rules for components containing ULP coprocessor code.
#
# ULP program(s) gets built and linked into the application.
# Steps taken here are explained in docs/ulp.rst
# Define names for files generated at different stages
ULP_ELF := $(ULP_APP_NAME).elf
ULP_MAP := $(ULP_ELF:.elf=.map)
ULP_SYM := $(ULP_ELF:.elf=.sym)
ULP_BIN := $(ULP_ELF:.elf=.bin)
ULP_EXPORTS_LD := $(ULP_ELF:.elf=.ld)
ULP_EXPORTS_HEADER := $(ULP_ELF:.elf=.h)
ULP_LD_SCRIPT := $(ULP_ELF:.elf=.common.ld)
ULP_OBJECTS := $(notdir $(ULP_S_SOURCES:.S=.ulp.o))
ULP_DEP := $(notdir $(ULP_S_SOURCES:.S=.ulp.d)) $(ULP_LD_SCRIPT:.ld=.d)
ULP_PREPROCESSED := $(notdir $(ULP_S_SOURCES:.S=.ulp.pS))
ULP_LISTINGS := $(notdir $(ULP_S_SOURCES:.S=.ulp.lst))
ULP_PREPROCESSOR_ARGS := \
$(addprefix -I ,$(COMPONENT_INCLUDES)) \
$(addprefix -I ,$(COMPONENT_EXTRA_INCLUDES)) \
-I$(COMPONENT_PATH) -D__ASSEMBLER__
-include $(ULP_DEP)
# Preprocess LD script used to link ULP program
$(ULP_LD_SCRIPT): $(ULP_LD_TEMPLATE)
$(summary) CPP $(notdir $@)
$(CC) $(CPPFLAGS) -MT $(ULP_LD_SCRIPT) -E -P -xc -o $@ $(ULP_PREPROCESSOR_ARGS) $<
# Generate preprocessed assembly files.
# To inspect these preprocessed files, add a ".PRECIOUS: %.ulp.pS" rule.
%.ulp.pS: $(COMPONENT_PATH)/ulp/%.S
$(summary) CPP $(notdir $<)
$(CC) $(CPPFLAGS) -MT $(patsubst %.ulp.pS,%.ulp.o,$@) -E -P -xc -o $@ $(ULP_PREPROCESSOR_ARGS) $<
# Compiled preprocessed files into object files.
%.ulp.o: %.ulp.pS
$(summary) ULP_AS $(notdir $@)
$(ULP_AS) -al=$(patsubst %.ulp.o,%.ulp.lst,$@) -o $@ $<
# Link object files and generate map file
$(ULP_ELF): $(ULP_OBJECTS) $(ULP_LD_SCRIPT)
$(summary) ULP_LD $(notdir $@)
$(ULP_LD) -o $@ -A elf32-esp32ulp -Map=$(ULP_MAP) -T $(ULP_LD_SCRIPT) $<
# Dump the list of global symbols in a convenient format.
$(ULP_SYM): $(ULP_ELF)
$(ULP_NM) -g -f posix $< > $@
# Dump the binary for inclusion into the project
$(COMPONENT_BUILD_DIR)/$(ULP_BIN): $(ULP_ELF)
$(summary) ULP_BIN $(notdir $@)
$(ULP_OBJCOPY) -O binary $< $@
# Left and right side of the rule are the same, but the right side
# is given as an absolute path.
# (Make can not resolve such things automatically)
$(ULP_EXPORTS_HEADER): $(COMPONENT_BUILD_DIR)/$(ULP_EXPORTS_HEADER)
# Artificial intermediate target to trigger generation of .h and .ld files.
.INTERMEDIATE: $(COMPONENT_NAME)_ulp_mapgen_intermediate
$(COMPONENT_BUILD_DIR)/$(ULP_EXPORTS_HEADER)\
$(COMPONENT_BUILD_DIR)/$(ULP_EXPORTS_LD): $(COMPONENT_NAME)_ulp_mapgen_intermediate
# Convert the symbols list into a header file and linker export script.
$(COMPONENT_NAME)_ulp_mapgen_intermediate: $(ULP_SYM)
$(summary) ULP_MAPGEN $(notdir $<)
$(ULP_MAP_GEN) -s $(ULP_SYM) -o $(ULP_EXPORTS_LD:.ld=)
# Building the component separately from the project should result in
# ULP files being built.
build: $(COMPONENT_BUILD_DIR)/$(ULP_EXPORTS_HEADER) \
$(COMPONENT_BUILD_DIR)/$(ULP_EXPORTS_LD) \
$(COMPONENT_BUILD_DIR)/$(ULP_BIN)
# Objects listed as being dependent on $(ULP_EXPORTS_HEADER) must also
# depend on $(ULP_SYM), to order build steps correctly.
$(ULP_EXP_DEP_OBJECTS) : $(ULP_EXPORTS_HEADER) $(ULP_SYM)
# Finally, set all the variables processed by the build system.
COMPONENT_EXTRA_CLEAN := $(ULP_OBJECTS) \
$(ULP_LD_SCRIPT) \
$(ULP_PREPROCESSED) \
$(ULP_ELF) $(ULP_BIN) \
$(ULP_MAP) $(ULP_SYM) \
$(ULP_EXPORTS_LD) \
$(ULP_EXPORTS_HEADER) \
$(ULP_DEP) \
$(ULP_LISTINGS)
COMPONENT_EMBED_FILES := $(COMPONENT_BUILD_DIR)/$(ULP_BIN)
COMPONENT_ADD_LDFLAGS := -l$(COMPONENT_NAME) -T $(COMPONENT_BUILD_DIR)/$(ULP_EXPORTS_LD)
COMPONENT_EXTRA_INCLUDES := $(COMPONENT_BUILD_DIR)