I am getting run time crash in the following piece of code and not able to debug also. Please review and let me know what's going on.
// CppConsole.cpp : Defines the entry point for the console application.
//#include "stdafx.h"#include <iostream>#include <assert.h>
class Test : public std::tr1::enable_shared_from_this<Test>
{
public:
Test():x(0),y(0),z(0){};
int x;
float y;
double z;
};
int _tmai开发者_如何学Cn(int argc, _TCHAR* argv[])
{
std::tr1::shared_ptr<Test> t1(new Test);
std::tr1::shared_ptr<Test> t2 = t1->shared_from_this();
return 0;
}
I have include all the headers and the program is compiling fine. This is the error i am getting:
CppConsole.exe - Entry Point Not Found The procedure entry point ?_Xweak@tr1@std@@YAXXZ could not be located in the dynamic link library MSVCP90D.dll
If I comment out this line
std::tr1::shared_ptr t2 = t1->shared_from_this();
the program runs without crashing.
Update: Question can be closed for now. I will try to install VS feature pack and see weather the program executes without any crashes.
Googled it (The procedure entry point ?_Xweak),found this : http://blog.nilretain.org/
EDIT : I Build and Run it successfully on my msvc 2008 on xp-sp3 ,which has later version of msvcp90d.dll. Maybe you can download and install the latest redist-version of msvc90 and rebuild.
EDIT: your dependencies says something is missing. check this out :
http://answers.yahoo.com/question/index?qid=20090623140325AAInugo
You need a template argument:
std::tr1::shared_ptr<Test> t1(new Test);
std::tr1::shared_ptr<Test> t2 = t1->shared_from_this();
The compiler should report an error if it is not present. (Visual C++ 2010 does)
It appears that your compiler is not linking against a DLL with the needed runtime functions. For instance, if you added the headers to your include path, but don't link to the latest version of the C++ runtime (check your project's settings), or installing the Visual C++ 2008 feature pack didn't work, or you installed the feature pack but then tried to compile from Visual Studio 2005, etc.
Basically the "process the source code (including headers)" step is working fine, but the "link all the DLLs" step is failing. And it's failing because the runtime you're linking against doesn't have the needed functions for shared_ptr
s or weak_ptr
s.
I had this problem when developing under M$ Windows SP3 with M$ Visual Studio 2008. I tried and combined many hints that I could find on the web. To no avail. The solution was simple, I had to install SP1 pack for M$ Visual Studio 2008!
The thing is that my external DLLs used C++ TR1 functions that I was not aware of. The M$ Visual Studio 2008 without SP does not have the right runtime DLLs.
So, just make sure you have that SP1 for your M$ Visual Studio 2008 first before trying any other solution.
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