LNK2019 包含 asio 标头时,使用 cmake 生成的解决方案
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)。
该项目对于 gcc 编译并运行良好,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,它工作了,理论上排除了 boost 构建问题。
CMakeLists.txt如下:(分隔感兴趣的部分)
.
.
.
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
I am trying to port a big project from gcc (Linux) to msvc (windows), using cmake and boost libraries.
The project compile and runs fine for gcc but on msvc it returns the following error:
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)
I tried running a simple project using boost asio and it worked, which teorethically excludes boost build problems.
The CMakeLists.txt is as follows: (separated the parts of interest)
.
.
.
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}
)
Thanks in advance
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尝试将标志“/EHsc”添加到 cmake 中的 TPN_WIN32 变量中。
看来 MSVC 没有抛出异常,您需要在 vcproj 中启用它。
Try to add the flag "/EHsc" into your TPN_WIN32 variable in cmake.
It seems that MSVC is not throwing exceptions and you need to enable it in your vcproj.
就我而言,
/EHsc
标志不起作用。事实证明,定义了BOOST_NO_EXCEPTIONS
,因此编译器正在搜索“用户定义”(如 boost/throw_exception.hpp 中)函数。因此,一个快速解决方法是编写您最喜欢的
boost:: throw_exception()
函数:In my case, the
/EHsc
flag did not work. Turned out thatBOOST_NO_EXCEPTIONS
was defined so the compiler was searching for the "user defined" (as in boost/throw_exception.hpp) function.Therefore, a quick fix is to write your favorite
boost::throw_exception()
function: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。
Looks like, to be linking compatible, binary must have same structure exception handling enablement option. MSVC standard library implementation use structured exception handling option on. Looks like this is why boost::system also uses this on. You might see corresponding warnings telling you to add structure exception handling.
在 Windows 上运行时,您需要(默认情况下)链接到
boost.system
和boost.regex
正如它所说的 此处:
如果您不想链接到其他 boost 库,那么您可以使用 此处 的相同(非 boost)asio 库。
就您的
CMakeLists.txt
文件而言,您需要一行来实际链接库。
编辑:另外,看看 如何链接boost.system 使用 cmake,您可能必须专门指定各个 boost 库,而不是
${Boost_LIBRARIES}
When running on windows you need (by default) to link to
boost.system
andboost.regex
As it says here:
If you don't want to link to other boost libraries then you can use the identical (non-boost) asio library from here.
In terms of your
CMakeLists.txt
file, you want a line such asto actually link the library.
EDIT: also, have a look at How to link against boost.system with cmake, it could be that you have to specify the individual boost libraries specifically rather than
${Boost_LIBRARIES}