I posted the issue in GitHib. Unfortunately I can't understand the answer. Can someone help?

Building a Mer/Sailfish OS project within Qt Creator relies on the definition and use of qtc_* macros inside the .spec file, which is not the case of lipstick library. Opened #122 to let mb2 issue warning when qtc_* macros are not used in the .spec file.

Hi,

What version of Qt are you using ? On what platform ?

By the way, is it just a typo or are you using packagesExists ? (additional s)

@Huulivoide
With that set I get this output:

[tools@steinwurf-124 build-qtandroid-Android_for_armeabi_v7a_GCC_4_9_Qt_5_5_0-Debug]$ /home/tools/Qt/5.5/android_armv7/bin/qmake -spec android-g++ CONFIG+=debug CONFIG+=declarative_debug CONFIG+=qml_debug -o Makefile ../qtandroid/qtandroid.pro Project ERROR: gstreamer-1.0 development package not found

I was having the same issue. I found that using the "LIBS" variable, instead of using:
"CONFIG += link_pkgconfig
PKGCONFIG += ..."
worked for me. So you put "LIBS += -lQt5GStreamer-1.0 -lQt5GStreamerUi-1.0" and whatever other libraries you need. If the library files are in an unusual place, you can use "LIBS += -L" followed by the directory. I'm not sure if it matters, but I'm using QMake version 3.0 and Qt Creator 4.0.0.