合并Libsinsp与gRPC的CMakeLists.txt编译报错求助

我需要开发一个整合Libsinsp与gRPC的程序，工作流程如下：

• 通过Libsinsp收集系统调用数据
• 利用gRPC传输数据

已分别完成两个独立程序的开发，现希望将它们整合为单个程序，但合并二者的CMakeLists.txt后编译时出现大量错误。

1. 收集系统调用数据的CMakeLists.txt #

include_directories("../../../common")
include_directories("../../")

add_executable(sinsp-example
    util.cpp
    test.cpp
)

target_link_libraries(sinsp-example
    sinsp
)

if (APPLE AND NOT MINIMAL_BUILD)
    # Needed when linking libcurl
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -framework Foundation -framework SystemConfiguration")
endif()

2. gRPC程序的CMakeLists.txt #

cmake_minimum_required(VERSION 3.5.1)

project(HelloWorld C CXX)

include(common.cmake)

# Proto file
get_filename_component(hw_proto "helloworld.proto" ABSOLUTE)
get_filename_component(hw_proto_path "${hw_proto}" PATH)

# Generated sources
set(hw_proto_srcs "${CMAKE_CURRENT_BINARY_DIR}/helloworld.pb.cc")
set(hw_proto_hdrs "${CMAKE_CURRENT_BINARY_DIR}/helloworld.pb.h")
set(hw_grpc_srcs "${CMAKE_CURRENT_BINARY_DIR}/helloworld.grpc.pb.cc")
set(hw_grpc_hdrs "${CMAKE_CURRENT_BINARY_DIR}/helloworld.grpc.pb.h")
add_custom_command(
      OUTPUT "${hw_proto_srcs}" "${hw_proto_hdrs}" "${hw_grpc_srcs}" "${hw_grpc_hdrs}"
      COMMAND ${_PROTOBUF_PROTOC}
      ARGS --grpc_out "${CMAKE_CURRENT_BINARY_DIR}"
        --cpp_out "${CMAKE_CURRENT_BINARY_DIR}"
        -I "${hw_proto_path}"
        --plugin=protoc-gen-grpc="${_GRPC_CPP_PLUGIN_EXECUTABLE}"
        "${hw_proto}"
      DEPENDS "${hw_proto}")

# Include generated *.pb.h files
include_directories("${CMAKE_CURRENT_BINARY_DIR}")

# hw_grpc_proto
add_library(hw_grpc_proto
  ${hw_grpc_srcs}
  ${hw_grpc_hdrs}
  ${hw_proto_srcs}
  ${hw_proto_hdrs})
target_link_libraries(hw_grpc_proto
  ${_REFLECTION}
  ${_GRPC_GRPCPP}
  ${_PROTOBUF_LIBPROTOBUF})

# Targets greeter_[async_](client|server)
foreach(_target  
  greeter_async_client2)
  add_executable(${_target} "${_target}.cc")
  target_link_libraries(${_target}
    hw_grpc_proto
    ${_REFLECTION}
    ${_GRPC_GRPCPP}
    ${_PROTOBUF_LIBPROTOBUF})
endforeach()

3. 合并后的CMakeLists.txt #

cmake_minimum_required(VERSION 3.5.1)

project(HelloWorld C CXX)

include_directories("../../../common")
include_directories("../../")

include(common.cmake)

# Proto file
get_filename_component(hw_proto "helloworld.proto" ABSOLUTE)
get_filename_component(hw_proto_path "${hw_proto}" PATH)

# Generated sources
set(hw_proto_srcs "${CMAKE_CURRENT_BINARY_DIR}/helloworld.pb.cc")
set(hw_proto_hdrs "${CMAKE_CURRENT_BINARY_DIR}/helloworld.pb.h")
set(hw_grpc_srcs "${CMAKE_CURRENT_BINARY_DIR}/helloworld.grpc.pb.cc")
set(hw_grpc_hdrs "${CMAKE_CURRENT_BINARY_DIR}/helloworld.grpc.pb.h")
add_custom_command(
      OUTPUT "${hw_proto_srcs}" "${hw_proto_hdrs}" "${hw_grpc_srcs}" "${hw_grpc_hdrs}"
      COMMAND ${_PROTOBUF_PROTOC}
      ARGS --grpc_out "${CMAKE_CURRENT_BINARY_DIR}"
        --cpp_out "${CMAKE_CURRENT_BINARY_DIR}"
        -I "${hw_proto_path}"
        --plugin=protoc-gen-grpc="${_GRPC_CPP_PLUGIN_EXECUTABLE}"
        "${hw_proto}"
      DEPENDS "${hw_proto}")

# Include generated *.pb.h files
include_directories("${CMAKE_CURRENT_BINARY_DIR}")

# hw_grpc_proto
add_library(hw_grpc_proto
  ${hw_grpc_srcs}
  ${hw_grpc_hdrs}
  ${hw_proto_srcs}
  ${hw_proto_hdrs})
target_link_libraries(hw_grpc_proto
  ${_REFLECTION}
  ${_GRPC_GRPCPP}
  ${_PROTOBUF_LIBPROTOBUF})

add_executable(sinsp-example
  util.cpp
  test.cpp
)

target_link_libraries(sinsp-example
  sinsp
  hw_grpc_proto
  ${_REFLECTION}
  ${_GRPC_GRPCPP}
  ${_PROTOBUF_LIBPROTOBUF})

编译报错片段 #

/home/jeremy/grpc/third_party/boringssl-with-bazel/linux-x86_64/crypto/fipsmodule/x86_64-mont5.S:2969: multiple definition of `bn_sqrx8x_internal'; ../../openssl-prefix/src/openssl/target/lib/libcrypto.a(x86_64-mont5.o):(.text+0x2420): first defined here
/usr/bin/ld: /home/jeremy/.local/lib/libcrypto.a(x86_64-mont5.S.o): in function `bn_scatter5':
/home/jeremy/grpc/third_party/boringssl-with-bazel/linux-x86_64/crypto/fipsmodule/x86_64-mont5.S:3601: multiple definition of `bn_scatter5'; ../../openssl-prefix/src/openssl/target/lib/libcrypto.a(x86_64-mont5.o):(.text+0x2e40): first defined here
/usr/bin/ld: /home/jeremy/.local/lib/libcrypto.a(x86_64-mont5.S.o): in function `bn_gather5':
/home/jeremy/grpc/third_party/boringssl-with-bazel/linux-x86_64/crypto/fipsmodule/x86_64-mont5.S:3610: multiple definition of `bn_gather5'; ../../openssl-prefix/src/openssl/target/lib/libcrypto.a(x86_64-mont5.o):(.text+0x2e80): first defined here
/usr/bin/ld: /home/jeremy/.local/lib/libcrypto.a(engine.c.o): in function `ENGINE_new':
engine.c:(.text+0x37): multiple definition of `ENGINE_new'; ../../openssl-prefix/src/openssl/target/lib/libcrypto.a(eng_lib.o):eng_lib.c:(.text+0x60): first defined here
/usr/bin/ld: /home/jeremy/.local/lib/libcrypto.a(engine.c.o): in function `ENGINE_free':
engine.c:(.text+0x7b): multiple definition of `ENGINE_free'; ../../openssl-prefix/src/openssl/target/lib/libcrypto.a(eng_lib.o):eng_lib.c:(.text+0x250): first defined here

解决建议 #

• 统一SSL库依赖：gRPC默认自带BoringSSL，而Libsinsp可能依赖系统版本的OpenSSL，导致链接时符号重复。可以二选一统一依赖：
  • 编译gRPC时添加CMake参数-DgRPC_USE_SYSTEM_OPENSSL=ON，让gRPC使用系统OpenSSL，重新编译gRPC后再合并项目。
  • 修改Libsinsp的CMake配置，将其依赖的OpenSSL路径指向gRPC自带的BoringSSL目录，强制Libsinsp使用同一套SSL库。
• 调整链接顺序：在target_link_libraries(sinsp-example ...)中，将sinsp放在gRPC相关库之前，尝试让链接器优先使用Libsinsp依赖的符号（仅作为临时尝试，不保证解决根本问题）。
• 禁用不必要的SSL功能：检查Libsinsp的编译选项，如果有禁用SSL相关功能的开关，关闭该功能以避免引入OpenSSL依赖。
• 清理缓存重新构建：删除项目的CMakeCache.txt和整个build目录，重新运行CMake配置，确保没有残留的旧依赖路径干扰编译。
• 临时规避（不推荐）：添加链接选项-Wl,--allow-multiple-definition强制忽略重复符号，但可能导致运行时未知问题，仅用于临时验证功能。

内容的提问来源于stack exchange，提问作者Jeremy Chong