处理错误LNK2001: Python扩展中未解析的外部符号__imp__ExitWindowsEx@8
处理错误LNK2001: Python扩展中未解析的外部符号__imp__ExitWindowsEx@8
提问于 2018-06-14 04:26:41
我正在尝试构建一个C项目。我认为来源是好的，但是我得到了这个错误：
错误LNK2001:未解析的外部符号__imp__ExitWindowsEx@8
或者获取完整的回溯：
C:\Users\Simon\Desktop\Learn>python setup.py build
running build
running build_ext
building 'sys_shutdown' extension
C:\Program Files (x86)\Microsoft Visual Studio\2017\WDExpress\VC\Tools\MSVC\14.14.26428\bin\HostX86\x86\cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MT -IC:\Users\Simon\AppData\Local\Programs\Python\Python36-32\include -IC:\Users\Simon\AppData\Local\Programs\Python\Python36-32\include "-IC:\Program Files (x86)\Microsoft Visual Studio\2017\WDExpress\VC\Tools\MSVC\14.14.26428\include" "-IC:\Program Files (x86)\Windows Kits\NETFXSDK\4.6.1\include\um" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.17134.0\ucrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.17134.0\shared" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.17134.0\um" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.17134.0\winrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.17134.0\cppwinrt" /Tcmain.c /Fobuild\temp.win32-3.6\Release\main.obj
main.c
C:\Program Files (x86)\Microsoft Visual Studio\2017\WDExpress\VC\Tools\MSVC\14.14.26428\bin\HostX86\x86\link.exe /nologo /INCREMENTAL:NO /LTCG /nodefaultlib:libucrt.lib ucrt.lib /DLL /MANIFEST:EMBED,ID=2 /MANIFESTUAC:NO /LIBPATH:C:\Users\Simon\AppData\Local\Programs\Python\Python36-32\libs /LIBPATH:C:\Users\Simon\AppData\Local\Programs\Python\Python36-32\PCbuild\win32 "/LIBPATH:C:\Program Files (x86)\Microsoft Visual Studio\2017\WDExpress\VC\Tools\MSVC\14.14.26428\lib\x86" "/LIBPATH:C:\Program Files (x86)\Windows Kits\NETFXSDK\4.6.1\lib\um\x86" "/LIBPATH:C:\Program Files (x86)\Windows Kits\10\lib\10.0.17134.0\ucrt\x86" "/LIBPATH:C:\Program Files (x86)\Windows Kits\10\lib\10.0.17134.0\um\x86" /EXPORT:PyInit_sys_shutdown build\temp.win32-3.6\Release\main.obj /OUT:build\lib.win32-3.6\sys_shutdown.cp36-win32.pyd /IMPLIB:build\temp.win32-3.6\Release\sys_shutdown.cp36-win32.lib
Creating library build\temp.win32-3.6\Release\sys_shutdown.cp36-win32.lib and object build\temp.win32-3.6\Release\sys_shutdown.cp36-win32.exp
main.obj : error LNK2001: unresolved external symbol __imp__ExitWindowsEx@8
build\lib.win32-3.6\sys_shutdown.cp36-win32.pyd : fatal error LNK1120: 1 unresolved externals
error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio\\2017\\WDExpress\\VC\\Tools\\MSVC\\14.14.26428\\bin\\HostX86\\x86\\link.exe' failed with exit status 1120我从here中了解到，__imp__ExitWindowsEx@8是由于未找到必要的运行时而导致的。
不要使用#using but link使用链接器命令行链接。您可以通过将user32.lib添加到链接器命令来完成此操作
我使用extra_objects在我的设置脚本中尝试了这一点
import setup, Extension
module = Extension(
"sys_shutdown",
sources = ["main.c"],
extra_objects = ["C:\\Program Files (x86)\\Windows Kits\\10\Lib\\10.0.17134.0\\um\\arm64\\User32.Lib"]
)
setup (
name = "sys_shutdown",
version = "1.0",
ext_modules = [module])我的main.c文件(这样您就知道我为什么需要链接以及我需要链接到什么)：
#include <Python.h>
#include <Windows.h>
/* The functions that need to be created */
static PyObject * sys_shutdown(PyObject *self) {
ExitWindowsEx(EWX_POWEROFF, SHTDN_REASON_MINOR_OTHER); // Shutdown
return Py_BuildValue("");
}
static PyObject * sys_restart(PyObject *self) {
ExitWindowsEx(EWX_REBOOT, SHTDN_REASON_MINOR_OTHER); // Restart
return Py_BuildValue("");
}
static PyObject * sys_log_out(PyObject *self) {
ExitWindowsEx(EWX_LOGOFF, SHTDN_REASON_MINOR_OTHER); // Log out
return Py_BuildValue("");
}
static PyMethodDef allMethods[] = {
{"sys_shutdown", (PyCFunction)sys_shutdown, METH_NOARGS, "Shuts down the device"},
{"sys_restart", (PyCFunction)sys_restart, METH_NOARGS, "Restarts the device"},
{"sys_log_out", (PyCFunction)sys_log_out, METH_NOARGS, "Closes all processes and logs out the user from the device"},
{NULL, NULL, 0, NULL}
};
static struct PyModuleDef allModule = {
PyModuleDef_HEAD_INIT,
"System Functions",
"sys_shutdown",
-1,
allMethods
};
PyMODINIT_FUNC PyInit_sys_shutdown(void) {
return PyModule_Create(&allModule);
}此扩展需要user32.dll提供的ExitWindowsEx()函数
如何将user32.dll链接到我的扩展(或者如果我完全错过了绘图，我如何才能使其正确编译)？
回答 1
Stack Overflow用户
回答已采纳
发布于 2018-06-14 04:34:17
好的，我找到了解决方案。已为系统运行时设置链接器路径。我所要做的就是链接运行时本身。这可以使用设置脚本中的library属性来完成：
from distutils.core import setup, Extension
module = Extension(
"sys_shutdown",
sources = ["main.c"],
libraries = ["user32"] # <-- Here it is
)
setup (
name = "sys_shutdown",
version = "1.0",
ext_modules = [module])页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/50845740
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