add_subdirectory(build/getoptPlusPlus)
add_subdirectory(build/hidapi)
add_subdirectory(build/jsoncpp)
add_subdirectory(build/serial)
add_subdirectory(build/tinkerforge)

if(ENABLE_PROTOBUF)
	set(BUILD_SHARED_LIBS OFF CACHE BOOL "Build shared protobuf library")
	add_subdirectory(external/protobuf)

	if(CMAKE_CROSSCOMPILING)
		# when crosscompiling import the protoc executable targets from a file generated by a native build
		option(IMPORT_PROTOC "Protoc export file (protoc_export.cmake) from a native build" "IMPORT_PROTOC-FILE_NOT_FOUND")
		include(${IMPORT_PROTOC})
	else()
		# export the protoc compiler so it can be used when cross compiling
		export(TARGETS protoc_compiler FILE "${CMAKE_BINARY_DIR}/protoc_export.cmake")
	endif()

	# define the include for the protobuf library at the parent scope
	set(PROTOBUF_INCLUDE_DIRS "${CMAKE_CURRENT_SOURCE_DIR}/external/protobuf/src")
	set(PROTOBUF_INCLUDE_DIRS ${PROTOBUF_INCLUDE_DIRS} PARENT_SCOPE)

	# define the protoc executable at the parent scope
	get_property(PROTOBUF_PROTOC_EXECUTABLE TARGET protoc_compiler PROPERTY LOCATION)
	set(PROTOBUF_PROTOC_EXECUTABLE ${PROTOBUF_PROTOC_EXECUTABLE} PARENT_SCOPE)
	message(STATUS "Using protobuf compiler: " ${PROTOBUF_PROTOC_EXECUTABLE})

	#=============================================================================
	# Copyright 2009 Kitware, Inc.
	# Copyright 2009-2011 Philip Lowman <philip@yhbt.com>
	# Copyright 2008 Esben Mose Hansen, Ange Optimization ApS
	#
	# Distributed under the OSI-approved BSD License (the "License");
	# see accompanying file Copyright.txt for details.
	#
	# This software is distributed WITHOUT ANY WARRANTY; without even the
	# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
	# See the License for more information.
	#=============================================================================
	# (To distribute this file outside of CMake, substitute the full
	#  License text for the above reference.)
	function(PROTOBUF_GENERATE_CPP SRCS HDRS)
		if(NOT ARGN)
			message(SEND_ERROR "Error: PROTOBUF_GENERATE_CPP() called without any proto files")
			return()
		endif()

		if(PROTOBUF_GENERATE_CPP_APPEND_PATH)
			# Create an include path for each file specified
			foreach(FIL ${ARGN})
				get_filename_component(ABS_FIL ${FIL} ABSOLUTE)
				get_filename_component(ABS_PATH ${ABS_FIL} PATH)
				list(FIND _protobuf_include_path ${ABS_PATH} _contains_already)
				if(${_contains_already} EQUAL -1)
					list(APPEND _protobuf_include_path -I ${ABS_PATH})
				endif()
			endforeach()
		else()
			set(_protobuf_include_path -I ${CMAKE_CURRENT_SOURCE_DIR})
		endif()

		if(DEFINED PROTOBUF_IMPORT_DIRS)
			foreach(DIR ${PROTOBUF_IMPORT_DIRS})
				get_filename_component(ABS_PATH ${DIR} ABSOLUTE)
				list(FIND _protobuf_include_path ${ABS_PATH} _contains_already)
				if(${_contains_already} EQUAL -1)
					list(APPEND _protobuf_include_path -I ${ABS_PATH})
				endif()
			endforeach()
		endif()

		if(CMAKE_CROSSCOMPILING)
			set(PROTOC_DEPENDENCY ${PROTOBUF_PROTOC_EXECUTABLE})
		else()
			set(PROTOC_DEPENDENCY protoc_compiler)
		endif()

		set(${SRCS})
		set(${HDRS})
		foreach(FIL ${ARGN})
			get_filename_component(ABS_FIL ${FIL} ABSOLUTE)
			get_filename_component(FIL_WE ${FIL} NAME_WE)

			list(APPEND ${SRCS} "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb.cc")
			list(APPEND ${HDRS} "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb.h")

			add_custom_command(
				OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb.cc"
					   "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb.h"
				COMMAND ${PROTOBUF_PROTOC_EXECUTABLE}
				ARGS --cpp_out ${CMAKE_CURRENT_BINARY_DIR} ${_protobuf_include_path} ${ABS_FIL}
				DEPENDS ${ABS_FIL} ${PROTOC_DEPENDENCY}
				COMMENT "Running C++ protocol buffer compiler on ${FIL}"
				VERBATIM
			)
		endforeach()

		set_source_files_properties(${${SRCS}} ${${HDRS}} PROPERTIES GENERATED TRUE)
		set(${SRCS} ${${SRCS}} PARENT_SCOPE)
		set(${HDRS} ${${HDRS}} PARENT_SCOPE)
	endfunction()
endif()