[PyQt] qmake variables support in PyQtWebEngine et al

[Dmitry Shachnev]

Hi Phil!

PyQt’s configure.py allows you to pass name=value or name+=value pairs as
command line arguments, and they will be written into generated .pro files.

However PyQtWebEngine (and I believe also QScintilla and other modules using
the same boilerplate) does not accept such pairs, which makes it inconvenient
for us in Debian (my use case is passing QMAKE_CXXFLAGS and QMAKE_LFLAGS).

It would be nice if you added such support. A very basic patch is attached.

--
Dmitry Shachnev
-------------- next part --------------
A non-text attachment was scrubbed...
Name: qmake_flags.diff
Type: text/x-diff
Size: 1149 bytes
Desc: not available
URL: <https://www.riverbankcomputing.com/pipermail/pyqt/attachments/20190307/ed11269b/attachment.diff>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: not available
URL: <https://www.riverbankcomputing.com/pipermail/pyqt/attachments/20190307/ed11269b/attachment.sig>