qtprotobuf/cmake/gRPCLookup.cmake

if(NOT gRPC_FOUND)
    find_package(gRPC CONFIG)
    if(NOT gRPC_FOUND)
        if(CMAKE_SIZEOF_VOID_P EQUAL 8)
            set(FIND_LIBRARY_USE_LIB64_PATHS TRUE)
            set(FIND_LIBRARY_USE_LIBX32_PATHS FALSE)
            set(FIND_LIBRARY_USE_LIB32_PATHS FALSE)
        else()
            set(FIND_LIBRARY_USE_LIBX32_PATHS TRUE)
            set(FIND_LIBRARY_USE_LIB32_PATHS TRUE)
            set(FIND_LIBRARY_USE_LIB64_PATHS FALSE)
        endif()

        find_program(gRPC_CPP_PLUGIN_EXECUTABLE grpc_cpp_plugin)
        if(NOT gRPC_CPP_PLUGIN_EXECUTABLE STREQUAL gRPC_CPP_PLUGIN_EXECUTABLE-NOTFOUND)
            add_executable(gRPC::grpc_cpp_plugin IMPORTED)
            set_target_properties(gRPC::grpc_cpp_plugin PROPERTIES IMPORTED_LOCATION ${gRPC_CPP_PLUGIN_EXECUTABLE})
        endif()

        find_library(gRPC_LIBRARY grpc)
        if(NOT gRPC_LIBRARY STREQUAL gRPC_LIBRARY-NOTFOUND)
            add_library(gRPC::grpc SHARED IMPORTED)
            set_target_properties(gRPC::grpc PROPERTIES IMPORTED_LOCATION ${gRPC_LIBRARY})
        endif()

        find_library(gRPC_CPP_LIBRARY grpc++)
        if(NOT gRPC_CPP_LIBRARY STREQUAL gRPC_LIBRARY-NOTFOUND)
            add_library(gRPC::grpc++ SHARED IMPORTED)
            set_target_properties(gRPC::grpc++ PROPERTIES IMPORTED_LOCATION ${gRPC_CPP_LIBRARY} INTERFACE_LINK_LIBRARIES protobuf::libprotobuf)
        endif()

        unset(gRPC_FOUND)
        if(NOT gRPC_LIBRARY STREQUAL gRPC_LIBRARY-NOTFOUND
                AND NOT gRPC_CPP_PLUGIN_EXECUTABLE STREQUAL gRPC_CPP_PLUGIN_EXECUTABLE-NOTFOUND
                AND NOT gRPC_CPP_LIBRARY STREQUAL gRPC_LIBRARY-NOTFOUND)
            set(gRPC_FOUND TRUE)
        else()
            unset(gRPC_LIBRARY)
            unset(gRPC_CPP_PLUGIN_EXECUTABLE)
            unset(gRPC_CPP_LIBRARY)
        endif()
    endif()
endif()