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250 lines
7.7 KiB
250 lines
7.7 KiB
#.rst:
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# FindProtobuf
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# ------------
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#
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# Locate and configure the Google Protocol Buffers library.
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#
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# The following variables can be set and are optional:
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#
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# ``PROTOBUF_SRC_ROOT_FOLDER``
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# When compiling with MSVC, if this cache variable is set
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# the protobuf-default VS project build locations
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# (vsprojects/Debug & vsprojects/Release) will be searched
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# for libraries and binaries.
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# ``PROTOBUF_IMPORT_DIRS``
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# List of additional directories to be searched for
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# imported .proto files.
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#
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# Defines the following variables:
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#
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# ``PROTOBUF_FOUND``
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# Found the Google Protocol Buffers library
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# (libprotobuf & header files)
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# ``PROTOBUF_INCLUDE_DIRS``
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# Include directories for Google Protocol Buffers
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# ``PROTOBUF_LIBRARIES``
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# The protobuf libraries
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# ``PROTOBUF_PROTOC_LIBRARIES``
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# The protoc libraries
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# ``PROTOBUF_LITE_LIBRARIES``
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# The protobuf-lite libraries
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#
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# The following cache variables are also available to set or use:
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#
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# ``PROTOBUF_LIBRARY``
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# The protobuf library
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# ``PROTOBUF_PROTOC_LIBRARY``
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# The protoc library
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# ``PROTOBUF_INCLUDE_DIR``
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# The include directory for protocol buffers
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# ``PROTOBUF_PROTOC_EXECUTABLE``
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# The protoc compiler
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# ``PROTOBUF_LIBRARY_DEBUG``
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# The protobuf library (debug)
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# ``PROTOBUF_PROTOC_LIBRARY_DEBUG``
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# The protoc library (debug)
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# ``PROTOBUF_LITE_LIBRARY``
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# The protobuf lite library
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# ``PROTOBUF_LITE_LIBRARY_DEBUG``
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# The protobuf lite library (debug)
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#
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# Example:
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#
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# .. code-block:: cmake
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#
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# find_package(Protobuf REQUIRED)
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# include_directories(${PROTOBUF_INCLUDE_DIRS})
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# include_directories(${CMAKE_CURRENT_BINARY_DIR})
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# protobuf_generate_cpp(PROTO_SRCS PROTO_HDRS foo.proto)
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# add_executable(bar bar.cc ${PROTO_SRCS} ${PROTO_HDRS})
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# target_link_libraries(bar ${PROTOBUF_LIBRARIES})
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#
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# .. note::
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# The PROTOBUF_GENERATE_CPP macro and add_executable() or
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# add_library() calls only work properly within the same
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# directory.
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#
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# .. command:: protobuf_generate_cpp
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#
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# Add custom commands to process ``.proto`` files::
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#
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# protobuf_generate_cpp (<SRCS> <HDRS> [<ARGN>...])
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#
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# ``SRCS``
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# Variable to define with autogenerated source files
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# ``HDRS``
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# Variable to define with autogenerated header files
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# ``ARGN``
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# ``.proto`` files
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#=============================================================================
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# Copyright 2009 Kitware, Inc.
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# Copyright 2009-2011 Philip Lowman <philip@yhbt.com>
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# Copyright 2008 Esben Mose Hansen, Ange Optimization ApS
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#
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# Distributed under the OSI-approved BSD License (the "License");
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# see accompanying file Copyright.txt for details.
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#
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# This software is distributed WITHOUT ANY WARRANTY; without even the
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# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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# See the License for more information.
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#=============================================================================
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# (To distribute this file outside of CMake, substitute the full
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# License text for the above reference.)
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function(PROTOBUF_GENERATE_CPP SRCS HDRS)
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if(NOT ARGN)
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message(SEND_ERROR "Error: PROTOBUF_GENERATE_CPP() called without any proto files")
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return()
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endif()
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if(PROTOBUF_GENERATE_CPP_APPEND_PATH)
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# Create an include path for each file specified
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foreach(FIL ${ARGN})
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get_filename_component(ABS_FIL ${FIL} ABSOLUTE)
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get_filename_component(ABS_PATH ${ABS_FIL} PATH)
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list(FIND _protobuf_include_path ${ABS_PATH} _contains_already)
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if(${_contains_already} EQUAL -1)
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list(APPEND _protobuf_include_path -I ${ABS_PATH})
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endif()
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endforeach()
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else()
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set(_protobuf_include_path -I ${CMAKE_CURRENT_SOURCE_DIR})
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endif()
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if(DEFINED PROTOBUF_IMPORT_DIRS)
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foreach(DIR ${PROTOBUF_IMPORT_DIRS})
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get_filename_component(ABS_PATH ${DIR} ABSOLUTE)
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list(FIND _protobuf_include_path ${ABS_PATH} _contains_already)
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if(${_contains_already} EQUAL -1)
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list(APPEND _protobuf_include_path -I ${ABS_PATH})
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endif()
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endforeach()
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endif()
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set(${SRCS})
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set(${HDRS})
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foreach(FIL ${ARGN})
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get_filename_component(ABS_FIL ${FIL} ABSOLUTE)
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get_filename_component(FIL_WE ${FIL} NAME_WE)
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list(APPEND ${SRCS} "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb.cc")
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list(APPEND ${HDRS} "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb.h")
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add_custom_command(
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OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb.cc"
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"${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb.h"
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COMMAND ${PROTOBUF_PROTOC_EXECUTABLE}
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ARGS --cpp_out ${CMAKE_CURRENT_BINARY_DIR} ${_protobuf_include_path} ${ABS_FIL}
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DEPENDS ${ABS_FIL} ${PROTOBUF_PROTOC_EXECUTABLE}
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COMMENT "Running C++ protocol buffer compiler on ${FIL}"
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VERBATIM )
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endforeach()
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set_source_files_properties(${${SRCS}} ${${HDRS}} PROPERTIES GENERATED TRUE)
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set(${SRCS} ${${SRCS}} PARENT_SCOPE)
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set(${HDRS} ${${HDRS}} PARENT_SCOPE)
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endfunction()
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# Internal function: search for normal library as well as a debug one
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# if the debug one is specified also include debug/optimized keywords
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# in *_LIBRARIES variable
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function(_protobuf_find_libraries name filename)
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find_library(${name}_LIBRARY
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NAMES ${filename}
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PATHS ${PROTOBUF_SRC_ROOT_FOLDER}/vsprojects/Release)
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mark_as_advanced(${name}_LIBRARY)
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find_library(${name}_LIBRARY_DEBUG
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NAMES ${filename}
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PATHS ${PROTOBUF_SRC_ROOT_FOLDER}/vsprojects/Debug)
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mark_as_advanced(${name}_LIBRARY_DEBUG)
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if(NOT ${name}_LIBRARY_DEBUG)
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# There is no debug library
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set(${name}_LIBRARY_DEBUG ${${name}_LIBRARY} PARENT_SCOPE)
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set(${name}_LIBRARIES ${${name}_LIBRARY} PARENT_SCOPE)
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else()
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# There IS a debug library
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set(${name}_LIBRARIES
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optimized ${${name}_LIBRARY}
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debug ${${name}_LIBRARY_DEBUG}
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PARENT_SCOPE
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)
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endif()
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endfunction()
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# Internal function: find threads library
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function(_protobuf_find_threads)
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set(CMAKE_THREAD_PREFER_PTHREAD TRUE)
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find_package(Threads)
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if(Threads_FOUND)
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list(APPEND PROTOBUF_LIBRARIES ${CMAKE_THREAD_LIBS_INIT})
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set(PROTOBUF_LIBRARIES "${PROTOBUF_LIBRARIES}" PARENT_SCOPE)
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endif()
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endfunction()
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#
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# Main.
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#
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# By default have PROTOBUF_GENERATE_CPP macro pass -I to protoc
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# for each directory where a proto file is referenced.
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if(NOT DEFINED PROTOBUF_GENERATE_CPP_APPEND_PATH)
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set(PROTOBUF_GENERATE_CPP_APPEND_PATH TRUE)
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endif()
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# Google's provided vcproj files generate libraries with a "lib"
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# prefix on Windows
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if(MSVC)
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set(PROTOBUF_ORIG_FIND_LIBRARY_PREFIXES "${CMAKE_FIND_LIBRARY_PREFIXES}")
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set(CMAKE_FIND_LIBRARY_PREFIXES "lib" "")
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find_path(PROTOBUF_SRC_ROOT_FOLDER protobuf.pc.in)
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endif()
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# The Protobuf library
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_protobuf_find_libraries(PROTOBUF protobuf)
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#DOC "The Google Protocol Buffers RELEASE Library"
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_protobuf_find_libraries(PROTOBUF_LITE protobuf-lite)
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# The Protobuf Protoc Library
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_protobuf_find_libraries(PROTOBUF_PROTOC protoc)
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# Restore original find library prefixes
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if(MSVC)
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set(CMAKE_FIND_LIBRARY_PREFIXES "${PROTOBUF_ORIG_FIND_LIBRARY_PREFIXES}")
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endif()
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if(UNIX)
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_protobuf_find_threads()
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endif()
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# Find the include directory
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find_path(PROTOBUF_INCLUDE_DIR
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google/protobuf/service.h
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PATHS ${PROTOBUF_SRC_ROOT_FOLDER}/src
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)
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mark_as_advanced(PROTOBUF_INCLUDE_DIR)
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# Find the protoc Executable
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find_program(PROTOBUF_PROTOC_EXECUTABLE
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NAMES protoc
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DOC "The Google Protocol Buffers Compiler"
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PATHS
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${PROTOBUF_SRC_ROOT_FOLDER}/vsprojects/Release
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${PROTOBUF_SRC_ROOT_FOLDER}/vsprojects/Debug
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)
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mark_as_advanced(PROTOBUF_PROTOC_EXECUTABLE)
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include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
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FIND_PACKAGE_HANDLE_STANDARD_ARGS(PROTOBUF DEFAULT_MSG
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PROTOBUF_LIBRARY PROTOBUF_INCLUDE_DIR)
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if(PROTOBUF_FOUND)
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set(PROTOBUF_INCLUDE_DIRS ${PROTOBUF_INCLUDE_DIR})
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endif()
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