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Diffstat (limited to 'Modules/FindProtobuf.cmake')
| -rw-r--r-- | Modules/FindProtobuf.cmake | 249 |
1 files changed, 249 insertions, 0 deletions
diff --git a/Modules/FindProtobuf.cmake b/Modules/FindProtobuf.cmake new file mode 100644 index 0000000..f01bd41 --- /dev/null +++ b/Modules/FindProtobuf.cmake @@ -0,0 +1,249 @@ +#.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. +# +# 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 +# ``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 +# ``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: +# +# .. code-block:: cmake +# +# 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:: +# The PROTOBUF_GENERATE_CPP macro and add_executable() or +# add_library() calls only work properly within the same +# directory. +# +# .. command:: protobuf_generate_cpp +# +# Add custom commands to process ``.proto`` files:: +# +# protobuf_generate_cpp (<SRCS> <HDRS> [<ARGN>...]) +# +# ``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} ${PROTOBUF_PROTOC_EXECUTABLE} + 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() |