py-pyside2: Error: Dependency 'qt57-qtspeech' not found

[ryandesign (Ryan Carsten Schmidt)]

​py-pyside2 depends on a nonexistent port, at least on Mountain Lion and earlier:

Error: Dependency 'qt57-qtspeech' not found.
Error: mportdepends py27-pyside2 activate failed.
Calculating dependencies for 'py27-pyside2' failed, aborting.
./mpbb/mpbb: error: `install-dependencies' failed to run successfully

Is the qt-qtspeech dependency mandatory? If not, maybe it could be excluded on older systems that are limited to a version of Qt that doesn't have that module. Or maybe there's a way to offer that module on older systems; I'm not sure.

[MarcusCalhoun-Lopez (Marcus Calhoun-Lopez)]

It turns out that py-pyside2 requires Qt 5.8 or above for other reasons as well.
I tried to see if there were simple workarounds, but I believe it would require non-trivial changes to get py-pyside2 working with Qt 5.7.
Further, there does not seem to be an ​easily accessible earlier version of py-pyside2 to use for earlier versions of Qt.

I will work on a way to fail more gracefully when Qt < 5.8 is installed.
Are there any objections, or does someone want to work on getting py-pyside2 to install on older version of Qt?

[pmetzger (Perry E. Metzger)]

PySide2 really can't work on older Qt. I think we shouldn't spend our time trying, it's a non-trivial piece of software.

[MarcusCalhoun-Lopez (Marcus Calhoun-Lopez)]

In 16f3439b8d0df3e48bb3ec4d6335305ee276b2cd/macports-ports (master):

py-pyside2: recognize that Qt >= 5.8 is required

Fixes #57517