#
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# Nanoapp NanoPB Makefile
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#
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# Include this file in your nanoapp Makefile to produce pb.c and pb.h (or
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# $NANOPB_EXTENSION.c and $NANOPB_EXTENSION.h if $NANOPB_EXTENSION is defined)
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# for .proto files specified in the NANOPB_SRCS variable. The produced pb.c or
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# $NANOPB_EXTENSION.c files are automatically added to the COMMON_SRCS variable
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# for the nanoapp build.
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#
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# NANOPB_FLAGS can be used to supply additional command line arguments to the
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# nanopb compiler. Note that this is global and applies to all protobuf
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# generated source.
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# Environment Checks ###########################################################
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ifneq ($(NANOPB_SRCS),)
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ifeq ($(NANOPB_PREFIX),)
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$(error "NANOPB_SRCS is non-empty. You must supply a NANOPB_PREFIX environment \
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variable containing a path to the nanopb project. Example: \
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export NANOPB_PREFIX=$$HOME/path/to/nanopb/nanopb-c")
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endif
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endif
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ifeq ($(PROTOC),)
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PROTOC=protoc
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endif
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# Generated Source Files #######################################################
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NANOPB_GEN_PATH = $(OUT)/nanopb_gen
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ifeq ($(NANOPB_EXTENSION),)
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NANOPB_EXTENSION = pb
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else
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NANOPB_GENERATOR_FLAGS = --extension=.$(NANOPB_EXTENSION)
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endif
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NANOPB_GEN_SRCS += $(patsubst %.proto, \
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$(NANOPB_GEN_PATH)/%.$(NANOPB_EXTENSION).c, \
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$(NANOPB_SRCS))
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ifneq ($(NANOPB_GEN_SRCS),)
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COMMON_CFLAGS += -I$(NANOPB_PREFIX)
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COMMON_CFLAGS += -I$(NANOPB_GEN_PATH)
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COMMON_CFLAGS += $(addprefix -I$(NANOPB_GEN_PATH)/, $(NANOPB_INCLUDES))
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ifneq ($(NANOPB_INCLUDE_LIBRARY),false)
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COMMON_SRCS += $(NANOPB_PREFIX)/pb_common.c
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COMMON_SRCS += $(NANOPB_PREFIX)/pb_decode.c
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COMMON_SRCS += $(NANOPB_PREFIX)/pb_encode.c
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endif
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endif
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# NanoPB Compiler Flags ########################################################
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ifneq ($(NANOPB_GEN_SRCS),)
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ifneq ($(NANOPB_INCLUDE_LIBRARY),false)
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COMMON_CFLAGS += -DPB_NO_PACKED_STRUCTS=1
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endif
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endif
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# NanoPB Generator Setup #######################################################
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NANOPB_GENERATOR_SRCS = $(NANOPB_PREFIX)/generator/proto/nanopb_pb2.py
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NANOPB_GENERATOR_SRCS += $(NANOPB_PREFIX)/generator/proto/plugin_pb2.py
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$(NANOPB_GENERATOR_SRCS):
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cd $(NANOPB_PREFIX)/generator/proto && make
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# Generate NanoPB Sources ######################################################
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COMMON_SRCS += $(NANOPB_GEN_SRCS)
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NANOPB_PROTOC = $(NANOPB_PREFIX)/generator/protoc-gen-nanopb
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$(NANOPB_GEN_PATH)/%.$(NANOPB_EXTENSION).c \
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$(NANOPB_GEN_PATH)/%.$(NANOPB_EXTENSION).h: %.proto \
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%.options \
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$(NANOPB_GENERATOR_SRCS)
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mkdir -p $(dir $@)
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$(PROTOC) --plugin=protoc-gen-nanopb=$(NANOPB_PROTOC) $(NANOPB_FLAGS) \
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--nanopb_out="$(NANOPB_GENERATOR_FLAGS) --options-file=$(basename $<).options:$(NANOPB_GEN_PATH)/$(NANOPB_PROTO_PATH)" \
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$<
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$(NANOPB_GEN_PATH)/%.$(NANOPB_EXTENSION).c \
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$(NANOPB_GEN_PATH)/%.$(NANOPB_EXTENSION).h: %.proto \
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$(NANOPB_OPTIONS) \
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$(NANOPB_GENERATOR_SRCS)
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mkdir -p $(dir $@)
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$(PROTOC) --plugin=protoc-gen-nanopb=$(NANOPB_PROTOC) $(NANOPB_FLAGS) \
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--nanopb_out="$(NANOPB_GENERATOR_FLAGS) --options-file=$(NANOPB_OPTIONS):$(NANOPB_GEN_PATH)/$(NANOPB_PROTO_PATH)" \
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$<
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