Protobuf compiler support in the build system
diff --git a/core/definitions.mk b/core/definitions.mk
index ca8bc67..ac431df 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -236,6 +236,19 @@
endef
###########################################################
+## Find all of the .proto files under the named directories.
+## Meant to be used like:
+## SRC_FILES := $(call all-proto-files-under,src)
+###########################################################
+
+define all-proto-files-under
+$(patsubst ./%,%, \
+ $(shell cd $(LOCAL_PATH) ; \
+ find $(1) -name "*.proto" -and -not -name ".*") \
+ )
+endef
+
+###########################################################
## Find all of the html files under the named directories.
## Meant to be used like:
## SRC_FILES := $(call all-html-files-under,src tests)
@@ -746,6 +759,34 @@
###########################################################
+## Commands for running protoc to compile .proto into .java
+###########################################################
+
+define transform-proto-to-java
+@mkdir -p $(dir $@)
+@echo "Protoc: $@ <= $(PRIVATE_PROTO_SRC_FILES)"
+@rm -rf $(PRIVATE_PROTO_JAVA_OUTPUT_DIR)
+@mkdir -p $(PRIVATE_PROTO_JAVA_OUTPUT_DIR)
+$(hide) $(PROTOC) \
+ $(addprefix --proto_path=, $(PRIVATE_PROTO_INCLUDES)) \
+ $(PRIVATE_PROTO_JAVA_OUTPUT_OPTION)=$(PRIVATE_PROTO_JAVA_OUTPUT_DIR) \
+ $(PRIVATE_PROTO_SRC_FILES)
+$(hide) touch $@
+endef
+
+######################################################################
+## Commands for running protoc to compile .proto into .pb.cc and .pb.h
+######################################################################
+define transform-proto-to-cc
+@mkdir -p $(dir $@)
+@echo "Protoc: $@ <= $<"
+$(hide) $(PROTOC) \
+ $(addprefix --proto_path=, $(PRIVATE_PROTO_INCLUDES)) \
+ --cpp_out=$(PRIVATE_PROTO_CC_OUTPUT_DIR) $<
+endef
+
+
+###########################################################
## Commands for running gcc to compile a C++ file
###########################################################