如何使用CMake编译.proto文件来生成.grpcp.pb.cc和.grpc.pb.h文件

How to compile .proto file using CMake to generate .grpc.pb.cc and .grpc.pb.h files?

本文关键字:文件 pb grpcp cc grpc CMake 何使用 编译 proto      更新时间:2023-10-16

我正试图在C++中使用gRPC创建服务器和客户端设置。我在CMake中生成.grpc.pb.h.grpc.pb.cc文件时遇到问题。以下是我的项目设置。

gRPCStarter
|__build
|__proto
|    |__ file.proto
|    |__ CMakeLists.txt
|__main.cpp
|__CMakeLists.txt

以下是我当前的CMakeLists.txt文件

proto目录内:

INCLUDE(FindProtobuf)
FIND_PACKAGE(Protobuf REQUIRED)
INCLUDE_DIRECTORIES(${PROTOBUF_INCLUDE_DIR})
PROTOBUF_GENERATE_CPP(PROTO_SRC PROTO_HEADER file.proto)
ADD_LIBRARY(proto ${PROTO_HEADER} ${PROTO_SRC})

source目录内(遵循此建议(:

cmake_minimum_required(VERSION 3.16)
project(gRPCStarter)
set(CMAKE_CXX_STANDARD 14)
include(FetchContent)
FetchContent_Declare(
gRPC
GIT_REPOSITORY https://github.com/grpc/grpc
GIT_TAG        v1.27.1
)
FetchContent_MakeAvailable(gRPC)
add_subdirectory(proto)
include_directories($(CMAKE_CURRENT_BINARY_DIR))
find_program(GRPC_CPP_PLUGIN grpc_cpp_plugin) # Get full path to plugin
function(PROTOBUF_GENERATE_GRPC_CPP SRCS HDRS)
if(NOT ARGN)
message(SEND_ERROR "Error: PROTOBUF_GENERATE_GRPC_CPP() called without any proto files")
return()
endif()
if(PROTOBUF_GENERATE_CPP_APPEND_PATH) # This variable is common for all types of output.
# 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}.grpc.pb.cc")
list(APPEND ${HDRS} "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.grpc.pb.h")
add_custom_command(
OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.grpc.pb.cc"
"${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.grpc.pb.h"
COMMAND  ${Protobuf_PROTOC_EXECUTABLE}
ARGS --grpc_out=${CMAKE_CURRENT_BINARY_DIR}
--plugin=protoc-gen-grpc=${GRPC_CPP_PLUGIN}
${_protobuf_include_path} ${ABS_FIL}
DEPENDS ${ABS_FIL} ${Protobuf_PROTOC_EXECUTABLE}
COMMENT "Running gRPC 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()
file(GLOB ProtoFiles "${CMAKE_CURRENT_SOURCE_DIR}/proto/*.proto")
PROTOBUF_GENERATE_GRPC_CPP(ProtoGRPCSources ProtoGRPCHeaders ${ProtoFiles})
add_executable(main main.cpp)
target_link_libraries(main proto ${PROTOBUF_LIBRARY} grpc++)

当我执行以下操作时,我不会得到任何.gpc.pb.h.grpc.pb.cc文件:

cd build
cmake .. && make -j4

这是我的CMakeOutput.log

我通过遵循这个CMake体系结构解决了这个问题。