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]