[Qt-creator] Proposal: Increase requirements for compiling Qt Creator to GCC>=5.3

[Eike Ziller]

1 1/2 years ago we started requiring GCC 4.9 or later for compiling Qt Creator. 

This compiler was first released over 4 years ago and even in its newest incarnation is almost 2 years old, so it is time to move on.
As far as my research (e.g. https://distrowatch.com) tells me, all major Linux distributions provide at least GCC 5.3 in their stable/LTS version (CentOS/RHEL only through the devtoolset package, but they didn’t provide 4.9 directly either).

So I propose requiring GCC 5.3, starting with Qt Creator 4.8 (which currently is branch ‘master').

Br, Eike

-- 
Eike Ziller
Principal Software Engineer

The Qt Company GmbH
Rudower Chaussee 13
D-12489 Berlin
eike.ziller at qt.io
http://qt.io
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