Modules/FindProtobuf.cmake - third_party/cmake - Git at Google

 #.rst:
 # FindProtobuf
 # ------------
 #
 #
 #
 # Locate and configure the Google Protocol Buffers library.
 #
 # The following variables can be set and are optional:
 #
 # ::
 #
 #    PROTOBUF_SRC_ROOT_FOLDER - When compiling with MSVC, if this cache variable is set
 #                               the protobuf-default VS project build locations
 #                               (vsprojects/Debug & vsprojects/Release) will be searched
 #                               for libraries and binaries.
 #
 #
 #
 # ::
 #
 #    PROTOBUF_IMPORT_DIRS     - List of additional directories to be searched for
 #                               imported .proto files. (New in CMake 2.8.8)
 #
 #
 #
 # Defines the following variables:
 #
 # ::
 #
 #    PROTOBUF_FOUND - Found the Google Protocol Buffers library (libprotobuf & header files)
 #    PROTOBUF_INCLUDE_DIRS - Include directories for Google Protocol Buffers
 #    PROTOBUF_LIBRARIES - The protobuf libraries
 #
 # [New in CMake 2.8.5]
 #
 # ::
 #
 #    PROTOBUF_PROTOC_LIBRARIES - The protoc libraries
 #    PROTOBUF_LITE_LIBRARIES - The protobuf-lite libraries
 #
 #
 #
 # The following cache variables are also available to set or use:
 #
 # ::
 #
 #    PROTOBUF_LIBRARY - The protobuf library
 #    PROTOBUF_PROTOC_LIBRARY   - The protoc library
 #    PROTOBUF_INCLUDE_DIR - The include directory for protocol buffers
 #    PROTOBUF_PROTOC_EXECUTABLE - The protoc compiler
 #
 # [New in CMake 2.8.5]
 #
 # ::
 #
 #    PROTOBUF_LIBRARY_DEBUG - The protobuf library (debug)
 #    PROTOBUF_PROTOC_LIBRARY_DEBUG   - The protoc library (debug)
 #    PROTOBUF_LITE_LIBRARY - The protobuf lite library
 #    PROTOBUF_LITE_LIBRARY_DEBUG - The protobuf lite library (debug)
 #
 #
 #
 # ::
 #
 #   ====================================================================
 #   Example:
 #
 #
 #
 # ::
 #
 #    find_package(Protobuf REQUIRED)
 #    include_directories(${PROTOBUF_INCLUDE_DIRS})
 #
 #
 #
 # ::
 #
 #    include_directories(${CMAKE_CURRENT_BINARY_DIR})
 #    PROTOBUF_GENERATE_CPP(PROTO_SRCS PROTO_HDRS foo.proto)
 #    add_executable(bar bar.cc ${PROTO_SRCS} ${PROTO_HDRS})
 #    target_link_libraries(bar ${PROTOBUF_LIBRARIES})
 #
 #
 #
 # NOTE: You may need to link against pthreads, depending
 #
 # ::
 #
 #        on the platform.
 #
 #
 #
 # NOTE: The PROTOBUF_GENERATE_CPP macro & add_executable() or
 # add_library()
 #
 # ::
 #
 #        calls only work properly within the same directory.
 #
 #
 #
 # ::
 #
 #   ====================================================================
 #
 #
 #
 # PROTOBUF_GENERATE_CPP (public function)
 #
 # ::
 #
 #    SRCS = Variable to define with autogenerated
 #           source files
 #    HDRS = Variable to define with autogenerated
 #           header files
 #    ARGN = proto files
 #
 #
 #
 # ::
 #
 #   ====================================================================


 #=============================================================================
 # 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()

   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}
       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()

 # Internal function: search for normal library as well as a debug one
 #    if the debug one is specified also include debug/optimized keywords
 #    in *_LIBRARIES variable
 function(_protobuf_find_libraries name filename)
    find_library(${name}_LIBRARY
        NAMES ${filename}
        PATHS ${PROTOBUF_SRC_ROOT_FOLDER}/vsprojects/Release)
    mark_as_advanced(${name}_LIBRARY)

    find_library(${name}_LIBRARY_DEBUG
        NAMES ${filename}
        PATHS ${PROTOBUF_SRC_ROOT_FOLDER}/vsprojects/Debug)
    mark_as_advanced(${name}_LIBRARY_DEBUG)

    if(NOT ${name}_LIBRARY_DEBUG)
       # There is no debug library
       set(${name}_LIBRARY_DEBUG ${${name}_LIBRARY} PARENT_SCOPE)
       set(${name}_LIBRARIES     ${${name}_LIBRARY} PARENT_SCOPE)
    else()
       # There IS a debug library
       set(${name}_LIBRARIES
           optimized ${${name}_LIBRARY}
           debug     ${${name}_LIBRARY_DEBUG}
           PARENT_SCOPE
       )
    endif()
 endfunction()

 # Internal function: find threads library
 function(_protobuf_find_threads)
     set(CMAKE_THREAD_PREFER_PTHREAD TRUE)
     find_package(Threads)
     if(Threads_FOUND)
         list(APPEND PROTOBUF_LIBRARIES ${CMAKE_THREAD_LIBS_INIT})
         set(PROTOBUF_LIBRARIES "${PROTOBUF_LIBRARIES}" PARENT_SCOPE)
     endif()
 endfunction()

 #
 # Main.
 #

 # By default have PROTOBUF_GENERATE_CPP macro pass -I to protoc
 # for each directory where a proto file is referenced.
 if(NOT DEFINED PROTOBUF_GENERATE_CPP_APPEND_PATH)
   set(PROTOBUF_GENERATE_CPP_APPEND_PATH TRUE)
 endif()


 # Google's provided vcproj files generate libraries with a "lib"
 # prefix on Windows
 if(MSVC)
     set(PROTOBUF_ORIG_FIND_LIBRARY_PREFIXES "${CMAKE_FIND_LIBRARY_PREFIXES}")
     set(CMAKE_FIND_LIBRARY_PREFIXES "lib" "")

     find_path(PROTOBUF_SRC_ROOT_FOLDER protobuf.pc.in)
 endif()

 # The Protobuf library
 _protobuf_find_libraries(PROTOBUF protobuf)
 #DOC "The Google Protocol Buffers RELEASE Library"

 _protobuf_find_libraries(PROTOBUF_LITE protobuf-lite)

 # The Protobuf Protoc Library
 _protobuf_find_libraries(PROTOBUF_PROTOC protoc)

 # Restore original find library prefixes
 if(MSVC)
     set(CMAKE_FIND_LIBRARY_PREFIXES "${PROTOBUF_ORIG_FIND_LIBRARY_PREFIXES}")
 endif()

 if(UNIX)
     _protobuf_find_threads()
 endif()

 # Find the include directory
 find_path(PROTOBUF_INCLUDE_DIR
     google/protobuf/service.h
     PATHS ${PROTOBUF_SRC_ROOT_FOLDER}/src
 )
 mark_as_advanced(PROTOBUF_INCLUDE_DIR)

 # Find the protoc Executable
 find_program(PROTOBUF_PROTOC_EXECUTABLE
     NAMES protoc
     DOC "The Google Protocol Buffers Compiler"
     PATHS
     ${PROTOBUF_SRC_ROOT_FOLDER}/vsprojects/Release
     ${PROTOBUF_SRC_ROOT_FOLDER}/vsprojects/Debug
 )
 mark_as_advanced(PROTOBUF_PROTOC_EXECUTABLE)


 include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
 FIND_PACKAGE_HANDLE_STANDARD_ARGS(PROTOBUF DEFAULT_MSG
     PROTOBUF_LIBRARY PROTOBUF_INCLUDE_DIR)

 if(PROTOBUF_FOUND)
     set(PROTOBUF_INCLUDE_DIRS ${PROTOBUF_INCLUDE_DIR})
 endif()
	#.rst:
	# FindProtobuf
	# ------------
	#
	#
	#
	# Locate and configure the Google Protocol Buffers library.
	#
	# The following variables can be set and are optional:
	#
	# ::
	#
	# PROTOBUF_SRC_ROOT_FOLDER - When compiling with MSVC, if this cache variable is set
	# the protobuf-default VS project build locations
	# (vsprojects/Debug & vsprojects/Release) will be searched
	# for libraries and binaries.
	#
	#
	#
	# ::
	#
	# PROTOBUF_IMPORT_DIRS - List of additional directories to be searched for
	# imported .proto files. (New in CMake 2.8.8)
	#
	#
	#
	# Defines the following variables:
	#
	# ::
	#
	# PROTOBUF_FOUND - Found the Google Protocol Buffers library (libprotobuf & header files)
	# PROTOBUF_INCLUDE_DIRS - Include directories for Google Protocol Buffers
	# PROTOBUF_LIBRARIES - The protobuf libraries
	#
	# [New in CMake 2.8.5]
	#
	# ::
	#
	# PROTOBUF_PROTOC_LIBRARIES - The protoc libraries
	# PROTOBUF_LITE_LIBRARIES - The protobuf-lite libraries
	#
	#
	#
	# The following cache variables are also available to set or use:
	#
	# ::
	#
	# PROTOBUF_LIBRARY - The protobuf library
	# PROTOBUF_PROTOC_LIBRARY - The protoc library
	# PROTOBUF_INCLUDE_DIR - The include directory for protocol buffers
	# PROTOBUF_PROTOC_EXECUTABLE - The protoc compiler
	#
	# [New in CMake 2.8.5]
	#
	# ::
	#
	# PROTOBUF_LIBRARY_DEBUG - The protobuf library (debug)
	# PROTOBUF_PROTOC_LIBRARY_DEBUG - The protoc library (debug)
	# PROTOBUF_LITE_LIBRARY - The protobuf lite library
	# PROTOBUF_LITE_LIBRARY_DEBUG - The protobuf lite library (debug)
	#
	#
	#
	# ::
	#
	# ====================================================================
	# Example:
	#
	#
	#
	# ::
	#
	# find_package(Protobuf REQUIRED)
	# include_directories(${PROTOBUF_INCLUDE_DIRS})
	#
	#
	#
	# ::
	#
	# include_directories(${CMAKE_CURRENT_BINARY_DIR})
	# PROTOBUF_GENERATE_CPP(PROTO_SRCS PROTO_HDRS foo.proto)
	# add_executable(bar bar.cc ${PROTO_SRCS} ${PROTO_HDRS})
	# target_link_libraries(bar ${PROTOBUF_LIBRARIES})
	#
	#
	#
	# NOTE: You may need to link against pthreads, depending
	#
	# ::
	#
	# on the platform.
	#
	#
	#
	# NOTE: The PROTOBUF_GENERATE_CPP macro & add_executable() or
	# add_library()
	#
	# ::
	#
	# calls only work properly within the same directory.
	#
	#
	#
	# ::
	#
	# ====================================================================
	#
	#
	#
	# PROTOBUF_GENERATE_CPP (public function)
	#
	# ::
	#
	# SRCS = Variable to define with autogenerated
	# source files
	# HDRS = Variable to define with autogenerated
	# header files
	# ARGN = proto files
	#
	#
	#
	# ::
	#
	# ====================================================================


	#=============================================================================
	# 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()

	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}
	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()

	# Internal function: search for normal library as well as a debug one
	# if the debug one is specified also include debug/optimized keywords
	# in *_LIBRARIES variable
	function(_protobuf_find_libraries name filename)
	find_library(${name}_LIBRARY
	NAMES ${filename}
	PATHS ${PROTOBUF_SRC_ROOT_FOLDER}/vsprojects/Release)
	mark_as_advanced(${name}_LIBRARY)

	find_library(${name}_LIBRARY_DEBUG
	NAMES ${filename}
	PATHS ${PROTOBUF_SRC_ROOT_FOLDER}/vsprojects/Debug)
	mark_as_advanced(${name}_LIBRARY_DEBUG)

	if(NOT ${name}_LIBRARY_DEBUG)
	# There is no debug library
	set(${name}_LIBRARY_DEBUG ${${name}_LIBRARY} PARENT_SCOPE)
	set(${name}_LIBRARIES ${${name}_LIBRARY} PARENT_SCOPE)
	else()
	# There IS a debug library
	set(${name}_LIBRARIES
	optimized ${${name}_LIBRARY}
	debug ${${name}_LIBRARY_DEBUG}
	PARENT_SCOPE
	)
	endif()
	endfunction()

	# Internal function: find threads library
	function(_protobuf_find_threads)
	set(CMAKE_THREAD_PREFER_PTHREAD TRUE)
	find_package(Threads)
	if(Threads_FOUND)
	list(APPEND PROTOBUF_LIBRARIES ${CMAKE_THREAD_LIBS_INIT})
	set(PROTOBUF_LIBRARIES "${PROTOBUF_LIBRARIES}" PARENT_SCOPE)
	endif()
	endfunction()

	#
	# Main.
	#

	# By default have PROTOBUF_GENERATE_CPP macro pass -I to protoc
	# for each directory where a proto file is referenced.
	if(NOT DEFINED PROTOBUF_GENERATE_CPP_APPEND_PATH)
	set(PROTOBUF_GENERATE_CPP_APPEND_PATH TRUE)
	endif()


	# Google's provided vcproj files generate libraries with a "lib"
	# prefix on Windows
	if(MSVC)
	set(PROTOBUF_ORIG_FIND_LIBRARY_PREFIXES "${CMAKE_FIND_LIBRARY_PREFIXES}")
	set(CMAKE_FIND_LIBRARY_PREFIXES "lib" "")

	find_path(PROTOBUF_SRC_ROOT_FOLDER protobuf.pc.in)
	endif()

	# The Protobuf library
	_protobuf_find_libraries(PROTOBUF protobuf)
	#DOC "The Google Protocol Buffers RELEASE Library"

	_protobuf_find_libraries(PROTOBUF_LITE protobuf-lite)

	# The Protobuf Protoc Library
	_protobuf_find_libraries(PROTOBUF_PROTOC protoc)

	# Restore original find library prefixes
	if(MSVC)
	set(CMAKE_FIND_LIBRARY_PREFIXES "${PROTOBUF_ORIG_FIND_LIBRARY_PREFIXES}")
	endif()

	if(UNIX)
	_protobuf_find_threads()
	endif()

	# Find the include directory
	find_path(PROTOBUF_INCLUDE_DIR
	google/protobuf/service.h
	PATHS ${PROTOBUF_SRC_ROOT_FOLDER}/src
	)
	mark_as_advanced(PROTOBUF_INCLUDE_DIR)

	# Find the protoc Executable
	find_program(PROTOBUF_PROTOC_EXECUTABLE
	NAMES protoc
	DOC "The Google Protocol Buffers Compiler"
	PATHS
	${PROTOBUF_SRC_ROOT_FOLDER}/vsprojects/Release
	${PROTOBUF_SRC_ROOT_FOLDER}/vsprojects/Debug
	)
	mark_as_advanced(PROTOBUF_PROTOC_EXECUTABLE)


	include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
	FIND_PACKAGE_HANDLE_STANDARD_ARGS(PROTOBUF DEFAULT_MSG
	PROTOBUF_LIBRARY PROTOBUF_INCLUDE_DIR)

	if(PROTOBUF_FOUND)
	set(PROTOBUF_INCLUDE_DIRS ${PROTOBUF_INCLUDE_DIR})
	endif()