Protobuf: added Makefile for building JAR and protoc-executable

proto/Makefile

@@ -0,0 +1,47 @@
+CXX = g++
+CXXFLAGS = -O2 -std=c++11
+LDFLAGS = -lprotoc -lprotobuf
+
+BUILDDIR = build
+EXE = $(BUILDDIR)/protoc
+JAR = $(BUILDDIR)/protokot-runtime.jar
+
+# C++ part
+PROTOC_DIR = compiler/google/src/google/protobuf/compiler/kotlin
+PROTOC_EXE = $(PROTOC_DIR)/protoc
+
+# Kotlin part
+RUNTIME_DIR = runtime
+RUNTIME_JAR = $(RUNTIME_DIR)/build/libs/protokot-runtime.jar
+
+all: $(EXE) $(JAR)
+
+# Place protoc* into build directory
+$(EXE): $(BUILDDIR) $(PROTOC_EXE)
+	cp $(PROTOC_EXE) $(EXE)
+
+# Build Protobuf Compiler via delegating call to another Makefile
+$(PROTOC_EXE):
+	$(MAKE) -C $(PROTOC_DIR)
+
+# Place ProtoKot Runtime JAR into build directory
+$(JAR): $(BUILDDIR) $(RUNTIME_JAR)
+	cp $(RUNTIME_JAR) $(JAR)
+
+# Build ProtoKot Runtime via delegating call to Gradle Script
+$(RUNTIME_JAR):
+	cd $(RUNTIME_DIR); gradle build
+
+# Create auxillary directories
+$(BINDIR):
+	mkdir -p $(BINDIR)
+
+$(BUILDDIR):
+	mkdir -p $(BUILDDIR)
+
+clean:
+	$(MAKE) -C $(PROTOC_DIR) clean
+	cd $(RUNTIME_DIR); gradle clean
+	rm -rf $(BUILDDIR)
+
+.PHONY: clean all generate test

proto/runtime/build.gradle

@@ -24,5 +24,6 @@ dependencies {
 }
 
 jar {
+    archiveName = "protokot-runtime.jar"
     from { configurations.compile.collect { it.isDirectory() ? it : zipTree(it) } }
 }