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126 lines
4.5 KiB
126 lines
4.5 KiB
#
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# Locate and configure the Google Protocol Buffers library
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#
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# Adds the following targets:
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#
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# protobuf::libprotobuf - Protobuf library
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# protobuf::libprotobuf-lite - Protobuf lite library
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# protobuf::libprotoc - Protobuf Protoc Library
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# protobuf::protoc - protoc executable
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#
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#
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# Generates C++ sources from the .proto files
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#
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# protobuf_generate_cpp (<SRCS> <HDRS> <DEST> [<ARGN>...])
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#
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# SRCS - variable to define with autogenerated source files
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# HDRS - variable to define with autogenerated header files
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# DEST - directory where the source files will be created
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# ARGN - .proto files
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#
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function(PROTOBUF_GENERATE_CPP SRCS HDRS DEST)
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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 ${SRCS} "${DEST}/${FIL_WE}.pb.cc")
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list(APPEND ${HDRS} "${DEST}/${FIL_WE}.pb.h")
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add_custom_command(
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OUTPUT "${DEST}/${FIL_WE}.pb.cc"
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"${DEST}/${FIL_WE}.pb.h"
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COMMAND protobuf::protoc
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ARGS --cpp_out ${DEST} ${_protobuf_include_path} ${ABS_FIL}
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DEPENDS ${ABS_FIL} protobuf::protoc
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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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# 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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# Find the include directory
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find_path(PROTOBUF_INCLUDE_DIR google/protobuf/service.h)
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mark_as_advanced(PROTOBUF_INCLUDE_DIR)
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# The Protobuf library
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find_library(PROTOBUF_LIBRARY NAMES protobuf)
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mark_as_advanced(PROTOBUF_LIBRARY)
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add_library(protobuf::libprotobuf UNKNOWN IMPORTED)
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set_target_properties(protobuf::libprotobuf PROPERTIES
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INTERFACE_INCLUDE_DIRECTORIES ${PROTOBUF_INCLUDE_DIR}
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INTERFACE_LINK_LIBRARIES pthread
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IMPORTED_LOCATION ${PROTOBUF_LIBRARY}
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)
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# The Protobuf lite library
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find_library(PROTOBUF_LITE_LIBRARY NAMES protobuf-lite)
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mark_as_advanced(PROTOBUF_LITE_LIBRARY)
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add_library(protobuf::libprotobuf-lite UNKNOWN IMPORTED)
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set_target_properties(protobuf::libprotobuf-lite PROPERTIES
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INTERFACE_INCLUDE_DIRECTORIES ${PROTOBUF_INCLUDE_DIR}
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INTERFACE_LINK_LIBRARIES pthread
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IMPORTED_LOCATION ${PROTOBUF_LITE_LIBRARY}
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)
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# The Protobuf Protoc Library
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find_library(PROTOBUF_PROTOC_LIBRARY NAMES protoc)
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mark_as_advanced(PROTOBUF_PROTOC_LIBRARY)
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add_library(protobuf::libprotoc UNKNOWN IMPORTED)
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set_target_properties(protobuf::libprotoc PROPERTIES
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INTERFACE_INCLUDE_DIRECTORIES ${PROTOBUF_INCLUDE_DIR}
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INTERFACE_LINK_LIBRARIES protobuf::libprotobuf
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IMPORTED_LOCATION ${PROTOBUF_PROTOC_LIBRARY}
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)
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# Find the protoc Executable
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find_program(PROTOBUF_PROTOC_EXECUTABLE NAMES protoc)
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mark_as_advanced(PROTOBUF_PROTOC_EXECUTABLE)
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add_executable(protobuf::protoc IMPORTED)
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set_target_properties(protobuf::protoc PROPERTIES
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IMPORTED_LOCATION ${PROTOBUF_PROTOC_EXECUTABLE}
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)
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include(${CMAKE_ROOT}/Modules/FindPackageHandleStandardArgs.cmake)
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FIND_PACKAGE_HANDLE_STANDARD_ARGS(Protobuf DEFAULT_MSG
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PROTOBUF_LIBRARY PROTOBUF_INCLUDE_DIR PROTOBUF_PROTOC_EXECUTABLE)
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