Eigen libarary linking error

eswaramrth03

I am developing visualizer application based on this libBSDF. In that i am using .pro file instead of cmake. In that i am using eigen library for computation. I included the library's as follows

I am getting the following linking error

Please do a needful as soon as possible.

jsulm

@eswaramrth03 said in Eigen libarary linking error:

Please do a needful as soon as possible.

This is user forum, be patient.
Please post text, not screen-shots.

Back to your issue: please take a closer look at how you're adding libBSDF. Do you think you're doing it correctly? When using -l parameter you have to remove lib prefix, so it should be -lbsdf.
Regarding Eigen: where do you set LIBS to tell the linker to link it?

eswaramrth03

Hi @jsulm

Eigen is a C++ template library, so I include the path in the .pro file

INCLUDEPATH += $$PWD/deps/eigen-3.4/

Is it correct?

JonB

@eswaramrth03
If that path is correct for its header files then yes. In any case, header file issues are dealt with at compile time. You show linker errors.

@jsulm already said (both) your LIBS += lines are wrong for libbsdf, so what did you do about those?

jsulm

@eswaramrth03 said in Eigen libarary linking error:

Eigen is a C++ template library

All of it?
You get a linker error, so looks like a lib is missing.

eswaramrth03

Hi @JonB The name of the library is libbsdf so only i included as -llibsdf in .pro file.

jsulm

@eswaramrth03 said in Eigen libarary linking error:

so only i included as -llibsdf in .pro file

Which is wrong as already mentioned in this thread.
It has to be -lsdf (lib prefix and .so suffix needs to be removed from library file name when using -l).

eswaramrth03

@jsulm if i give similar way. I got the following error.

LINK : fatal error LNK1104: cannot open file 'bsdf.lib'

JonB

@eswaramrth03
Just so we understand what is going. For the debug case you seem to have:

LIBS += -L$$PWD/deps/libbsdf/LibbsdfBin/debug/ -llibbsdf

Temporarily try changing that to

LIBS += $$PWD/deps/libbsdf/LibbsdfBin/debug/libbsdf.lib

(Adjust above for release instead of debug if compiling that way.)

I am hoping this is allowed and will clarify that for sure you are linking with that library file, and that it exists. Examine any error messages you might get.

Also confirm that everything --- your own code and whatever libraries you link with --- are all compiled with MSVC (not MinGW) and all with the same version of MSVC?

eswaramrth03

Hi @JonB
If i add the library like above you mentioned, the same eigen library error will came.

jsulm

@eswaramrth03 Please post the whole build log as text