Linking GSL library to Qt App on Windows

[YoungCaveMan]

Hi everyone,

I have been trying to link GSL library (https://www.gnu.org/software/gsl/doc/html/usage.html) to an application I am building in Qt (Qt 6 6.3.1).

I got the source files of GSL library preprad to be compiled for windows from https://github.com/BrianGladman/gsl and I tested the compiled libraries, They work fine on Visual Studio.

In Qt, the lines added to the .pro file to statically link the library are:

When I compile and build the app, I recevie an error of the type "undefined reference to". I understan this means there is something wrong with linking, though I am not sure how to debug any further, any suggestions.

I can share the library files if that is allowed

Thank you

[SGaist]

Your .pro file search the libraries in the sources not the build folder.

[SGaist]

Hi and welcome to devnet,

Based on what you wrote, you seem to be trying to use a library built with visual studio while building your application with MinGW. If so, this can't work. You can't mix and match compilers when using C++ libraries.

[YoungCaveMan]

@SGaist Thank you very much

I compiled the library using MinGW64 (MSYS 2 MinGW64, the typing
$ pacman mingw-w64-x86_64-gsl-2.7.1-1)

I then got the header files and the .a files copied from msys2 to the folder of the app and linked them, still getting the same error. Any suggestions?

Thanks again

[SGaist]

Your .pro file search the libraries in the sources not the build folder.

[YoungCaveMan]

@SGaist Thank you very much! It works perfectly now

[Alex_kr1999]

@YoungCaveMan , can you tell, how build and use gsl in qt, step by step?