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Unresolved external Symbol
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Hi,
When I am trying to return a QString from a method I am getting linker error.
My code is like:
extern "C"{
_declspec QString _stdcall function1(char* name);
}
I am using MSVC 6.0 compiler.
Could any body help me?
(NOte: If I remove _stdcall its working fine)
Thanks in Advance,
pad510
When I am trying to return a QString from a method I am getting linker error.
My code is like:
extern "C"{
_declspec QString _stdcall function1(char* name);
}
I am using MSVC 6.0 compiler.
Could any body help me?
(NOte: If I remove _stdcall its working fine)
Thanks in Advance,
pad510
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Join Date: Aug 2005
Posts: 15,408
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>>(NOte: If I remove _stdcall its working fine)
Then what's the problem? Leave _stdcall out then.
Then what's the problem? Leave _stdcall out then.
Don't PM me with questions -- you might get a nasty PM in response. If you have a question then post it in one of the forums.
Hi,
I am wondering what is the problem with _stdcall,since its working for all other types(pre defined and user defined) except QString
I am wondering what is the problem with _stdcall,since its working for all other types(pre defined and user defined) except QString
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Join Date: Aug 2005
Posts: 15,408
Reputation:
Solved Threads: 1469
_stdcall and _cdecl are identical and are the default for C and C++ functions. Therefore is never a reason to use _stdcall or _cdecl in C and C++ programs. Using Microsoft compilers that is. What compiler are you using?
I don't know why its not working for you. Are you sure you have the correct prototype? Do you have the source code for the function so that you can verify -- but you probably already did that.
I don't know why its not working for you. Are you sure you have the correct prototype? Do you have the source code for the function so that you can verify -- but you probably already did that.
Last edited by Ancient Dragon; Mar 28th, 2008 at 6:47 am.
Don't PM me with questions -- you might get a nasty PM in response. If you have a question then post it in one of the forums.
_cdecl and _stdcall has some difference, I think you are calling the function from the library written using different calling convention than the one you are using. Its basically a name decoration issue, not resolved by linkers.
In VC++ 6.0 _cdecl is the default calling convention.
_cdecl In this type convention the caller is responsible for cleaning up the stack.
_stdcall In this type of convention the callee is responsible for cleaning up the stack.
search calling conventions.
In VC++ 6.0 _cdecl is the default calling convention.
_cdecl In this type convention the caller is responsible for cleaning up the stack.
_stdcall In this type of convention the callee is responsible for cleaning up the stack.
search calling conventions.
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Originally Posted by Laiq Ahmed 
_cdecl and _stdcall has some difference,.
Last edited by Ancient Dragon; Mar 28th, 2008 at 10:33 am.
Don't PM me with questions -- you might get a nasty PM in response. If you have a question then post it in one of the forums.
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