Hi all, I'm a newbie to QT. I have imported the third party static libraries to my project successfully. When I try to call a function in the main.cpp, it gives LNK2019: unresolved external symbol... issue. I'm compiling my project with the MSVC2017 32bit compiler. If the main function is empty, project builds successfully. I went through a lot of forums. I would like to know the exact reason for this. I tried every possible solutions that worked for others. But yet not able to find a solution for my issue. Thanks in advance!

unresolved external symbol This clearly indicates that Either your library is not found in the directory or Method which you are trying to access is not there in library Library is compiled using different compiler and u r using MSCVC Library is 64 bit and your project 32 bit. Just check all this.

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LNK2019: unresolved external symbol issue happens when calling a function from third party static library

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U Uddo_ud

@aha_1980

Here is the error log

Is it for pure C or C++ symbols?

I didn't get this.

The only thing I can imagine is that some environment paths are not correctly so the linker pulls in something different.

Is this means the build environment settings in the QT project? I will check it.

In the project we have included <windows.h>. Path to the windows SDK in the QT build environment might be the problem?
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Uddo_ud

wrote on last edited by

#21

Solution for this issue has been found in the below forum. Thanks all for the support.

https://forum.qt.io/topic/97995/can-qt-access-windows-sdk-functions-in-a-third-party-static-libraries/3
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