Added protobuf-c to project

.gitignore

@@ -1,3 +1,4 @@
+#Build files
 .cache
 CMakeCache.txt
 CMakeFiles
@@ -8,3 +9,6 @@ Makefile
 urchin-*
 lib*.a
 lib*.so
+
+#Generated code
+src/protobuf_gen

CMakeLists.txt

@@ -9,6 +9,11 @@ set(CMAKE_C_STANDARD 90)
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 set(CMAKE_C_CLANG_TIDY)
 
+# Get protobuf to serialize data between the server and client
+# cmake config not packaged with the lib. resort to pkg config
+include(FindPkgConfig)
+pkg_check_modules(protobuf-c REQUIRED libprotobuf-c>=1.4.1)
+
 # Compile Shared Library
 file(GLOB_RECURSE LIBRARY_SOURCE_FILES
     ${CMAKE_SOURCE_DIR}/src/shared_lib/*.c)
@@ -16,7 +21,35 @@ file(GLOB_RECURSE LIBRARY_SOURCE_FILES
 file(GLOB_RECURSE LIBRARY_HEADER_FILES
     ${CMAKE_SOURCE_DIR}/src/shared_lib/*.h)
 
-add_library(${PROJECT_NAME} SHARED ${LIBRARY_HEADER_FILES} ${LIBRARY_SOURCE_FILES})
+# Generate Protobuf code
+find_program(protoc-c_EXECUTABLE NAMES protoc-c REQUIRED)
+find_package_handle_standard_args(protoc-c REQUIRED_VARS protoc-c_EXECUTABLE)
+file(GLOB_RECURSE PROTOBUF_PROTO_FILES
+    ${CMAKE_SOURCE_DIR}/protobuf/*.proto)
+add_custom_target(GenerateProtobuf)
+add_custom_command(
+    OUTPUT GenerateProtobuf
+    DEPENDS ${protoc-c_EXECUTABLE}
+    COMMAND ${protoc-c_EXECUTABLE} --c_out=${CMAKE_SOURCE_DIR}/src/protobuf_gen/ --proto_path=${CMAKE_SOURCE_DIR}/protobuf/ ${PROTOBUF_PROTO_FILES}
+)
+
+# Include protobuf generated  message formats
+file(GLOB_RECURSE PROTOBUF_SOURCE_FILES
+    ${CMAKE_SOURCE_DIR}/src/protobuf_gen/*.c)
+
+file(GLOB_RECURSE PROTOBUF_HEADER_FILES
+    ${CMAKE_SOURCE_DIR}/src/protobuf_gen/*.h)
+
+add_library(${PROJECT_NAME} SHARED
+    GenerateProtobuf
+    ${LIBRARY_HEADER_FILES}
+    ${LIBRARY_SOURCE_FILES}
+    ${PROTOBUF_HEADER_FILES}
+    ${PROTOBUF_SOURCE_FILES}
+)
+
+target_link_libraries(${PROJECT_NAME} protobuf-c)
+
 
 # Compile Server
 file(GLOB_RECURSE SERVER_SOURCE_FILES

protobuf/amessage.proto

@@ -0,0 +1,4 @@
+message AMessage {
+  required int32 a=1;
+  optional int32 b=2;
+}