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      1 #
      2 # Nanoapp NanoPB Makefile
      3 #
      4 # Include this file in your nanoapp Makefile to produce pb.c and pb.h for .proto
      5 # files specified in the NANOPB_SRCS variable. The produced pb.c files are
      6 # automatically be added to the COMMON_SRCS variable for the nanoapp build.
      7 
      8 include $(CHRE_PREFIX)/build/defs.mk
      9 
     10 # Environment Checks ###########################################################
     11 
     12 ifneq ($(NANOPB_SRCS),)
     13 ifeq ($(NANOPB_PREFIX),)
     14 $(error "NANOPB_SRCS is non-empty. You must supply a NANOPB_PREFIX environment \
     15          variable containing a path to the nanopb project. Example: \
     16          export NANOPB_PREFIX=$$HOME/path/to/nanopb/nanopb-c")
     17 endif
     18 endif
     19 
     20 # Generated Source Files #######################################################
     21 
     22 NANOPB_GEN_PATH = $(OUT)/nanopb_gen
     23 
     24 NANOPB_GEN_SRCS += $(patsubst %.proto, $(NANOPB_GEN_PATH)/%.pb.c, \
     25                               $(NANOPB_SRCS))
     26 
     27 ifneq ($(NANOPB_GEN_SRCS),)
     28 COMMON_CFLAGS += -I$(NANOPB_PREFIX)
     29 COMMON_CFLAGS += -I$(NANOPB_GEN_PATH)
     30 COMMON_CFLAGS += $(addprefix -I$(NANOPB_GEN_PATH)/, $(NANOPB_INCLUDES))
     31 
     32 COMMON_SRCS += $(NANOPB_PREFIX)/pb_common.c
     33 COMMON_SRCS += $(NANOPB_PREFIX)/pb_decode.c
     34 COMMON_SRCS += $(NANOPB_PREFIX)/pb_encode.c
     35 endif
     36 
     37 # NanoPB Compiler Flags ########################################################
     38 
     39 ifneq ($(NANOPB_GEN_SRCS),)
     40 COMMON_CFLAGS += -DPB_NO_PACKED_STRUCTS=1
     41 endif
     42 
     43 # NanoPB Generator Setup #######################################################
     44 
     45 NANOPB_GENERATOR_SRCS = $(NANOPB_PREFIX)/generator/proto/nanopb_pb2.py
     46 NANOPB_GENERATOR_SRCS += $(NANOPB_PREFIX)/generator/proto/plugin_pb2.py
     47 
     48 $(NANOPB_GENERATOR_SRCS):
     49 	cd $(NANOPB_PREFIX)/generator/proto && make
     50 
     51 # Generate NanoPB Sources ######################################################
     52 
     53 COMMON_SRCS += $(NANOPB_GEN_SRCS)
     54 
     55 NANOPB_PROTOC = $(NANOPB_PREFIX)/generator/protoc-gen-nanopb
     56 
     57 $(NANOPB_GEN_PATH)/%.pb.c $(NANOPB_GEN_PATH)/%.pb.h: %.proto \
     58                                                      $(wildcard %.options) \
     59                                                      $(NANOPB_GENERATOR_SRCS)
     60 	mkdir -p $(dir $@)
     61 	protoc --plugin=protoc-gen-nanopb=$(NANOPB_PROTOC) \
     62 	  --nanopb_out=$(NANOPB_GEN_PATH) $<
     63