Trivial simple OpenGl working example

[Виталий Фадеев]

On Thursday, 8 July 2021 at 15:30:07 UTC, drug wrote:
> 08.07.2021 17:20, Виталий Фадеев пишет:
>> [...]
>
> I failed to reproduce that. What platform you use and what is 
> the compiler version?

drug, Linux, Ubuntu, x64
# uname -a
Linux unknown 5.11.0-22-generic #23-Ubuntu SMP Thu Jun 17 
00:34:23 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

# dmd --version
DMD64 D Compiler v2.097.0

# dub --version
DUB version 1.26.0, built on Jun  3 2021

#  pkg-config --modversion sdl2
2.0.14