LNK2019在包含asio头文件时,用cmake生成解决方案

Question

我正在尝试使用cmake和boost库将一个大项目从gcc(Linux)移植到msvc(windows).

该项目编译并运行正常的gcc但在msvc上它返回以下错误:

Dyna.obj : error LNK2019: unresolved external symbol "void __cdecl boost::throw_exception(class std::exception const &)" (?throw_exception@boost@@YAXABVexception@std@@@Z) referenced in function "void __cdecl boost::asio::detail::do_throw_error(class boost::system::error_code const &,char const *)" (?do_throw_error@detail@asio@boost@@YAXABVerror_code@system@3@PBD@Z)

我尝试使用boost asio运行一个简单的项目,它工作,从根本上排除了boost构建问题.

CMakeLists.txt如下:(分开感兴趣的部分)

    .
    .
    .
IF(WIN32)
          # Flags para garantir a compilação em windows
          SET(CMAKE_CXX_COMPILER icpl)
          SET(TPN_WIN32 "/D WIN32")
          SET(TPN_WIN32_LIB ws2_32.lib odbc32.lib odbccp32.lib)
          SET(CMAKE_EXE_LINKER_FLAGS /NODEFAULTLIB:LIBC;LIBCMT)

    ENDIF(WIN32)

    # Comando para se livrar de warning sobre o caminho da library pthread
    IF(COMMAND cmake_policy)
      cmake_policy(SET CMP0003 NEW)
    ENDIF(COMMAND cmake_policy)

    # Configuracao do TPN REALTIME
    # === inicio ===
    IF (REALTIME_YES)
      MESSAGE ("[TPN] REALTIME ENABLED")
      set(Boost_ADDITIONAL_VERSIONS "1.45.0")
      set(Boost_USE_MULTITHREAD ON)
      set(Boost_USE_STATIC_LIBS ON)
      FIND_PACKAGE( Boost "1.45.0" COMPONENTS system filesystem serialization program_options regex thread date_time REQUIRED)
      FIND_PACKAGE( Threads REQUIRED )

      set(HYDRO_CXX_FLAGS "-DREALTIME -DJOYSTICK")
      set(HYDRO_CXX_LFLAGS ${Boost_LIBRARIES})

      INCLUDE_DIRECTORIES(hydro)


       INCLUDE_DIRECTORIES(${Boost_INCLUDE_DIR})
        ENDIF (REALTIME_YES)
        # ===  final ===
        .
        .
        .

    TARGET_LINK_LIBRARIES(Dyna
      tpn
      preadyn
      ${WHERE_PREA3D}
      ${WHERE_WAMIT_IO}
      ${WHERE_WAMIT_CONVERTER}
      ${WHERE_TECLINE}
      ${HYDRO_CXX_LFLAGS}
      ${TPN_WIN32_LIB}
    )

提前致谢

Answer 1

尝试将标记"/ EHsc"添加到cmake中的TPN_WIN32变量中.似乎MSVC没有抛出异常,您需要在vcproj中启用它.

Answer 2

就我而言,/EHsc旗帜不起作用.原来这BOOST_NO_EXCEPTIONS是定义的,所以编译器正在搜索"用户定义"(如在boost/throw_exception.hpp中)函数.

因此,快速解决方法是编写您喜欢的boost::throw_exception()功能:

namespace boost
{
#ifdef BOOST_NO_EXCEPTIONS
void throw_exception( std::exception const & e ){
    throw 11; // or whatever
};
#endif
}// namespace boost

Answer 3

看起来，为了链接兼容，二进制文件必须具有相同的结构异常处理启用选项。MSVC 标准库的实现使用结构化异常处理选项。看起来这就是 boost::system 也使用它的原因。您可能会看到相应的警告，告诉您添加结构异常处理。

IF(MSVC)
    ADD_DEFINITIONS("/EHsc")
ENDIF(MSVC)