Strange LNK 2019 error in qt

Shaharyaar

I have checked my code thoroughly but here's a strange thing that linker is giving me error of unresolved symbol even though I have included list.h file in main() function. Can anybody help to fix this issue. I have uploaded the relevant screenshots of my code.

![main()] (https://imgur.com/k34Vozr)

![.pro file] (https://imgur.com/vIqZkua)

![list.h file] (https://imgur.com/YR15tKA)

![list.cpp] (https://imgur.com/E9k5Hwe)

mranger90

Did you re-run qmake after adding the list.cpp to the .pro file ?

SGaist

Hi,

To add to @mranger90, I wouldn't use list.h as, IIRC, it's a header that is already provided by the STL.

Shaharyaar

Running qmake corrected my problem thanks. Thing is I am new to Qt in fact I am completely new to using frameworks for developing GUI. So can you tell me why there's a need of to run qmake first and then build the project? Because I made the same code in visual studio and I build it without using cmake.

SGaist

You modified the project, re-running qmake refreshes the related generated files.

However for that kind of edit, it should have happened automatically. What version of Qt Creator are you using ? How did you modify the .pro file ?

Shaharyaar

I am currently using Qt 5.6.3