Wireshark-dev: Re: [Wireshark-dev] When to drop Qt 4 support and require Qt 5?
From: Anders Broman <[email protected]>
Date: Thu, 25 Jan 2018 14:56:15 +0000
-----Original Message-----
From: Wireshark-dev [mailto:[email protected]] On Behalf Of Peter Wu
Sent: den 25 januari 2018 15:20
To: Developer support list for Wireshark <[email protected]>
Subject: [Wireshark-dev] When to drop Qt 4 support and require Qt 5?

Hi all,

Qt 4.8 has not been supported for two years now ("standard support"
ended in December 2015,
https://blog.qt.io/blog/2015/05/26/qt-4-8-7-released/). Is it feasible to drop support for Qt 4 and require Qt 5?

The development branch has apparently been broken for a while, I tried to patch it up here: https://code.wireshark.org/review/25469

Reasons not to drop Qt 4.8 support:

 - RHEL/CentOS 6 by default do not have Qt 5, see
   https://wiki.wireshark.org/Development/Support_library_version_tracking#RHEL.2FCentOS

Reasons to drop Qt 4.8 support:

 - Reduce maintenance overhead (allow use of new Qt 5 features, use new
   signal/slot syntax, ...).
 - Related to the above, dropping Qt 4 would enable simplification:
   https://www.wireshark.org/lists/wireshark-dev/201712/msg00045.html
 - Upstream support has ended in December 2015.
 - We do not test it (not even compile testing), so bugs will sneak in.
 - macOS and Windows already require Qt 5.

It is probably too late for 2.6, but can we commit to this for the next version? Or can we already declare Qt 4 unsupported now?
--

I'd vote for branching off 2.6 now and go all hog and require the latest stuff for everything.( e.g What's in SuSE 12.2 RedHat 7,? Ubuntu 16.04 or 18.04).
And/Or require Qt5 for 2.6, older systems can still use GTK. 
/Anders
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