[Octave-bug-tracker] [bug #39600] configure: more precise checks for required Qt features needed

[Mike Miller]

URL:
  <http://savannah.gnu.org/bugs/?39600>

                 Summary: configure: more precise checks for required Qt
features needed
                 Project: GNU Octave
            Submitted by: mtmiller
            Submitted on: Sun 28 Jul 2013 05:16:48 PM EDT
                Category: Configuration and Build System
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Build Failure
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: Any

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Details:

Octave's configure currently only tests for Qt to be at least version 4 when
determining whether the GUI is to be built or not. In fact the GUI requires
some higher version of Qt 4.x. Octave fails to compile with Qt 4.2 and
succeeds with 4.6 and higher.

Since it's been stated that we don't like arbitrary version tests, we'll need
to identify a set of functions that the GUI is using that were introduced
after Qt 4.0 and either make those conditional, if possible, or make them hard
requirements for building the GUI at all.

By the way, the test for Qt >= 4.0.0 is pretty much irrelevant the way it's
written. Qt 3.x didn't have the same pkg-config modules that Octave is looking
for, so their existence already implies Qt 4 or higher.




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