[Octave-bug-tracker] [bug #55282] QT_CPPFLAGS and QT_LDFLAGS not always present when needed

[Mike Miller]

Follow-up Comment #9, bug #55282 (project octave):

Thanks. Then it looks to me like the pkg-config that comes with your
installation of Qt is giving you a bad configuration. It should be giving you
-I options that point to /usr/local/opt/qt/include that can actually be used,
and not the other. If you can fix your Qt pkg-config files, then Octave's
configure should set everything up correctly. If you can't, then you will have
to use the global CPPFLAGS environment variable.

For other math libraries Octave has options like --with-arpack-includedir=DIR.
But Qt is much more complicated and has many more moving parts, and we simply
don't have an option or a variable for you to pass in the Qt include directory
alone.

You might want to report a bug to homebrew or whoever your packager is for the
Qt library, because it seems to me that the pkg-config isn't useful in the
state it's in now.

If you pass in CPPFLAGS=-I/usr/local/opt/qt/include, Qt is found and works
correctly, so can we close this as working correctly?

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