How to install a missing library in Qt Creator for a project?

[a.burks]

I try to build and install a project, that is required for another project from Github. If I open the first one in Qt Creator, I get the error:

Project ERROR: Unknown module(s) in QT: testlib

How can I install this module? It seems to be not included in Qt Creator for macOS?

[joeQ]

@a.burks Hi,friend. Welcome.

is your project file *.pro had QT += testlib ?

if not, add the line to your project file:

QT += testlib

That's Ok.

[a.burks]

@joeQ said in How to install a missing library in Qt Creator for a project?:

QT += testlib

Thanks so much for your answer. The project has one major *.pro file and another *.pro file in each of the five subdirectory. First I tried to add thie line into the major file and afterwards in the other fiules as well. The error message is the same.

[joeQ]

@a.burks what's github? could you share me the github link? that i can watch the project struct.

[a.burks]

Wow. Thanks for your answer.

This is the base project from Mer Project Git repository:
https://git.merproject.org/mer-core/lipstick

And this is the related Github pojekt, that is based on the previous project.
https://github.com/nemomobile-graveyard/lipstick-example-home

[jsulm]

@a.burks If you create a small test project and add

QT += testlib

does it then work?

[a.burks]

@jsulm said in How to install a missing library in Qt Creator for a project?:

QT += testlib

Thanks for your suggetion. I have created a very simple hello world project and added the quoted line in the *.pro file. Then I started the build with the following output:

Project ERROR: Unknown module(s) in QT: testlib

[aha_1980]

@a.burks That looks like there is no testlib support in your SDK. You should report this as bug /request help from the SDK vendor.

[a.burks]

@aha_1980 I have posted this issue at the Jolla forum. Unforutnately it's not possible to register to their Buzilla. Jolla has closed the registration option because of spam.

[a.burks]

Maybe building the lipstick library with the Sailfish Platform SDK would be a solution. After building the library I could reference the library in the lipstick example project, where I need this library. How could I include or reference a library?

[aha_1980]

@a.burks

The usual way to add a library to your project is:

Add INCLUDEPATH+="/path/to/lib/include" and LIBS+=-L"/path/to/lib/lib" -l"libname" to your pro file.

libname is the final library name without the starting "lib" and ".so". E.g. libmath.so is linked as -lmath

[edit: fixed library name SGaist]