Solution for link error:Cannot Open File 'python27_d.lib'
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引自:http://guangboo.org/2013/01/17/solution-link-errorcannot-open-file-python27_dlib
感谢原作者
使用C调用Python函数或解释器时,在添加了Include Directories和Library Directories等配置后,仍然编译错误:"LINK : fatal error LNK1104: cannot open file 'python27_d.lib'".代码如下:
#include <stdio.h>#include <Python.h>int main(void){ Py_Initialize(); if(!Py_IsInitialized()){ printf("Python Initialize failed.\n"); return 1; } PyRun_SimpleString("print('hello world!')"); Py_Finalize(); system("pause"); return 0;}
Stackoverflow贴出了pyconfig.h头文件中对Python27_d.lib的引用(http://stackoverflow.com/questions/11311877/creating-a-dll-from-a-wrapped-cpp-file-with-
swig/14372472#14372472),该文件用于调试用,如下代码:
/* For Windows the Python core is in a DLL by default. TestPy_NO_ENABLE_SHARED to find out. Also support MS_NO_COREDLL for b/w compat */#if !defined(MS_NO_COREDLL) && !defined(Py_NO_ENABLE_SHARED)# define Py_ENABLE_SHARED 1 /* standard symbol for shared library */# define MS_COREDLL /* deprecated old symbol */#endif /* !MS_NO_COREDLL && ... *//* All windows compilers that use this header support __declspec */#define HAVE_DECLSPEC_DLL/* For an MSVC DLL, we can nominate the .lib files used by extensions */#ifdef MS_COREDLL# ifndef Py_BUILD_CORE /* not building the core - must be an ext */# if defined(_MSC_VER) /* So MSVC users need not specify the .lib file in their Makefile (other compilers are generally taken care of by distutils.) */# ifdef _DEBUG# pragma comment(lib,"python27_d.lib")# else# pragma comment(lib,"python27.lib")# endif /* _DEBUG */# endif /* _MSC_VER */# endif /* Py_BUILD_CORE */#endif /* MS_COREDLL */
可以发现,只有MS_NO_COREDLL或Py_NO_ENABLE_SHARED被定义了,那么#ifdef MS_COREDLL块的代码就不会被编译。因此可以在Configuration Properties->C/C++->Preprocessor->Preprocessor Definitions添加MS_NO_COREDLL或Py_NO_ENABLE_SHARED,去掉_DEBUG,将没有效果。也可以在引用python.h头文件前添加#define MS_NO_COREDLL或#define Py_NO_ENABLE_SHARED。
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