c – Windows / MSVC10下的Boost.Python链接错误
作者：互联网
我使用正确的Python配置使用b2编译了boost 1.50.0库.这是命令b2 –debug-configuration的相关输出：
notice: [python-cfg] Configuring python...
notice: [python-cfg] user-specified cmd-or-prefix: "C:\Python33z\python"
notice: [python-cfg] Checking interpreter command "C:\Python33z\python"...
notice: [python-cfg] running command 'DIR /-C /A:S "C:\Python33z\python.exe" 2>&
1'
notice: [python-cfg] running command '"C:\Python33z\python" -c "from sys import
*; print('version=%d.%d\nplatform=%s\nprefix=%s\nexec_prefix=%s\nexecutable=%s'
% (version_info[0],version_info[1],platform,prefix,exec_prefix,executable))" 2>&
1' notice: [python-cfg] Configuring python...
notice: [python-cfg] user-specified cmd-or-prefix: "C:\Python33z\python"
notice: [python-cfg] Checking interpreter command "C:\Python33z\python"...
notice: [python-cfg] running command 'DIR /-C /A:S "C:\Python33z\python.exe" 2>&
1'
notice: [python-cfg] running command '"C:\Python33z\python" -c "from sys import
*; print('version=%d.%d\nplatform=%s\nprefix=%s\nexec_prefix=%s\nexecutable=%s'
% (version_info[0],version_info[1],platform,prefix,exec_prefix,executable))" 2>&
1'
notice: [python-cfg] ...requested configuration matched!
notice: [python-cfg] Details of this Python configuration:
notice: [python-cfg] interpreter command: "C:\Python33z\python"
notice: [python-cfg] include path: "C:\Python33z\Include"
notice: [python-cfg] library path: "C:\Python33z\libs"
notice: [python-cfg] DLL search path: "C:\Python33z"
notice: [msvc-cfg] msvc-10.0 detected, command: 'C:\Program Files (x86)\Microsof
t Visual Studio 10.0\VC\bin\cl.exe'
notice: will use 'C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\bin\cl.
exe' for msvc, condition <toolset>msvc-10.0
...updating 4 targets...
msvc.archive bin.v2\libs\python\build\msvc-10.0\debug\link-static\threading-mult
i\libboost_python3-vc100-mt-gd-1_50.lib
common.copy stage\lib\libboost_python3-vc100-mt-gd-1_50.lib
bin.v2\libs\python\build\msvc-10.0\debug\link-static\threading-multi\libboost_py
thon3-vc100-mt-gd-1_50.lib
1 file(s) copied.
msvc.archive bin.v2\libs\python\build\msvc-10.0\release\link-static\threading-mu
lti\libboost_python3-vc100-mt-1_50.lib
common.copy stage\lib\libboost_python3-vc100-mt-1_50.lib
bin.v2\libs\python\build\msvc-10.0\release\link-static\threading-multi\libboost_
python3-vc100-mt-1_50.lib
1 file(s) copied.
...updated 4 targets...
The Boost C++ Libraries were successfully built!
我已正确设置链接器目录并链接到相应的输出文件(libboost_
发布时为python3-vc100-mt-1_50.lib,调试时为libboost_python3-vc100-mt-gd-1_50.lib.我正在使用自编译的python发行版,但我也试过了标准的发行版,结果没有任何不同.
我编译时遇到的链接错误是：
error LNK2019: unresolved external symbol "__declspec(dllimport) protected: __thiscall boost::python::detail::str_base::str_base(char const *)" (__imp_??0str_base@detail@python@boost@@IAE@PBD@Z) referenced in function "public: __thiscall boost::python::str::str(char const *)" (??0str@python@boost@@QAE@PBD@Z)
error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall boost::python::detail::str_base::~str_base(void)" (__imp_??1str_base@detail@python@boost@@QAE@XZ) referenced in function "public: __thiscall boost::python::str::~str(void)" (??1str@python@boost@@QAE@XZ)
error LNK2019: unresolved external symbol "__declspec(dllimport) class boost::python::api::object __cdecl boost::python::import(class boost::python::str)" (__imp_?import@python@boost@@YA?AVobject@api@12@Vstr@12@@Z) referenced in function _main
fatal error LNK1120: 3 unresolved externals
产生这些错误的测试代码归结为：
using namespace boost::python;
object main_module = import("__main__");
我使用了具有相同构建配置的Boost.Filesystem,它没有给我带来任何问题.
我希望有人可以帮我解决这个问题,这真让我感到困惑！
更新：我刚读了一些关于定义BOOST_PYTHON_STATIC_LIB的模糊文本;我不确定我是否朝着正确的方向前进(因为afaik在构建过程中没有提到),但不管怎样,它给了我一个更令人困惑的错误：
LINK : fatal error LNK1104: cannot open file 'python27.lib'
当python-cfg输出清楚地显示它发现我的python33 dist(我的应用程序已经链接了; python33.lib)时,我不知道为什么它试图链接到那个lib.
解决方法:
第一个问题：事实证明定义BOOST_PYTHON_STATIC_LIB确实是修复未解决的外部链接错误的正确方法.当与静态lib链接时,它似乎是必要的定义;这似乎很明显,但这里没有提到：http://www.boost.org/doc/libs/1_50_0/libs/python/doc/building.html.
第二个问题：在添加了这个定义之后,发生了下一个链接错误,因为我在使用正确的Python配置重新构建之前没有运行b2 clean(即,在清理之前没有重新编译！),这应该是显而易见的缺乏编译器相关的输出,但它确实欺骗了我,所以这只是另一件小事需要注意.
标签：boost-python,python,c,boost 来源： https://codeday.me/bug/20190826/1727525.html