This is meant to allow the buildsystem to add additional paths (for e.g.
QML imports) while still allowing the application to pick up the paths
where e.g. Qt's plugins are located – without having to query qtpaths or
the build system to locate them first, and to then also add them to
qt.conf.
QLibraryInfo::paths will return a list containing any values provided in
qt.conf, followed by the value that would have been provided if there
were no qt.conf file.
If no value is provided at all for a given key in qt.conf,
QLibraryInfo::path will behave as if no qt.conf file was provided,
instead of using LocationInfo::defaultValue.
For now, this is considered to be internal only, and won't be
documented.
Change-Id: Ic74c66b5cbde605b43336cd88c3f909999381f46
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
5573ca3599