Bug 410248

I had a similar issue with Lubuntu 18.04 and the QT XCB database. Update to the current distribution 19.04 solved the issue (even if you have the long term version). 

Maybe something similar.

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I am on the current El release of 7.6.

Try with: sudo apt-get install libstdc++6. 

If does not solve the issue try: 
sudo apt-get update
sudo apt-get upgrade
sudo apt-get dist-upgrade

So, EL is a Red Hat base, and doesn't use apt-get but yum. Packages are also named differently, and there's no such thing that I'm aware of like a dist-upgrade.

James Pulver
________________________________________
From: emohr <bugzilla_noreply@kde.org>
Sent: Tuesday, August 20, 2019 1:29 PM
To: James M. Pulver
Subject: [kdenlive] [Bug 410248] Appimage for 19.04.3 doesn't work with EL7.6

https://bugs.kde.org/show_bug.cgi?id=410248

--- Comment #4 from emohr <fritzibaby@gmx.net> ---
Try with: sudo apt-get install libstdc++6.

If does not solve the issue try:
sudo apt-get update
sudo apt-get upgrade
sudo apt-get dist-upgrade

--
You are receiving this mail because:
You reported the bug.

I'm not really a Linux specialist. 
Do you tried to make the AppImage executive with: chmod a+x appimage?

It seems you have to update libstdc++.so.6. 
I saw a command like:
yum update -y libstdc++.x86_64
yum install libstdc++.i686.

Yes, the reason I reported this as a bug is it likely needs to be packaged into an appimage with an older libc.  Whatever environment used for v18 would likely work, unless there is a specific need for excluding stable OSs or non bleeding edge ones for kdenlive to compile. But at least sometimes with AppImages the person who made it just didn't do so from an older OS so I was hoping to ping the builder via this bug.

James Pulver
________________________________________
From: emohr <bugzilla_noreply@kde.org>
Sent: Tuesday, August 20, 2019 2:02 PM
To: James M. Pulver
Subject: [kdenlive] [Bug 410248] Appimage for 19.04.3 doesn't work with EL7.6

https://bugs.kde.org/show_bug.cgi?id=410248

--- Comment #6 from emohr <fritzibaby@gmx.net> ---
I'm not really a Linux specialist.
Do you tried to make the AppImage executive with: chmod a+x appimage?

It seems you have to update libstdc++.so.6.
I saw a command like:
yum update -y libstdc++.x86_64
yum install libstdc++.i686.

--
You are receiving this mail because:
You reported the bug.

Following the answer from one of the developer of Kdenlive: 

"libstdc++6 is never packaged in a appimage. By construct, an appimage will not be able to run on a system that is more ancient than the one we are building it on. So maybe we can look into building on a slightly older system, but there is a limit to what we can do (since we use fairly recent c++ features) and most likely the answer will be "sorry, your distro is too old to be supported, please consider upgrading"."