Google returns "- Implemented "aux" template that allows making use of the INSTALLS variable without building anything. Needed for projects with QML entry point." From Digia's 4.8 release notes.
Also of interest: the patch which added this.
Question
What does this line mean in qmake .pro file?
TEMPLATE=aux
It is not documented, but seems to not cause an error or anything now that I tested it, and I've seen it used in a .pro.
Solution
Google returns "- Implemented "aux" template that allows making use of the INSTALLS variable without building anything. Needed for projects with QML entry point." From Digia's 4.8 release notes.
Also of interest: the patch which added this.
OTHER TIPS
The TEMPLATE variable's value of aux is now documented at https://doc.qt.io/qt-5/qmake-variable-reference.html#template .
I have seen TEMPLATE = aux used in .pro files for Qt Installer Frameworks projects which create standalone executables which do not have to be run from Qt Creator.