[chimerax-users] Version 1.4 for CentOS 7?

[Tom Goddard]

Tristan is right.  ChimeraX is not available for CentOS 7 or Ubuntu 16 or 18 because the Qt 6 window toolkit does not support those old Linux operating systems and ChimeraX 1.4 uses Qt 6.  So ChimeraX 1.3 is the last release that can be used with those operating systems.

Greg Couch on the ChimeraX developer team tried compiling Qt 6 for CentOS 7, and tried making a Docker image, a Singularity image, and a Flatpak.  None of these worked.  Because the Qt window toolkit is a much bigger package than the entire ChimeraX project we don't have the programmers to make Qt work on old Linux versions if the Qt Company chooses not to support old Linux.

	Tom


> On Jun 15, 2022, at 8:22 AM, Tristan Croll via ChimeraX-users <chimerax-users at cgl.ucsf.edu> wrote:
> 
> Sadly, this is going to become a theme for virtually all scientific packages using (Py)Qt for their GUI. The Qt company have decided to stop supporting the free version of Qt5, pushing all developers other than those who can afford the license fees on to Qt6 (which does not run in CentOS 7). It's a real pain, but that's just the way things are.
> 
> -- Tristan
> From: ChimeraX-users <chimerax-users-bounces at cgl.ucsf.edu> on behalf of Ricardo Righetto via ChimeraX-users <chimerax-users at cgl.ucsf.edu>
> Sent: 15 June 2022 15:58
> To: chimerax-users at cgl.ucsf.edu <chimerax-users at cgl.ucsf.edu>
> Subject: [chimerax-users] Version 1.4 for CentOS 7?
>  
> Hi,
> 
> First, apologies if this has already been announced elsewhere.
> I see on the download webpage that there is no production release for CentOS 7 and the latest daily release for this platform was built on 2022-05-06. Any chance we could get a production release of 1.4 and/or a newer daily build for CentOS 7?
> 
> Thank you very much!
> 
> Best wishes,
> 
> --
> Ricardo Diogo Righetto
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