[Nix-dev] OpenGL and Nix

[stewart mackenzie]

Yeah, Oliver, your email just nudged me over the boundary. I think
I'll just statically link libGL to the main (virtual machine) process
each and every time. This is terrible because now CLI programs need
libGL!

Jesus, mono-cycling down a road drunk, christ!

This also open up some potential serious annoyances ie non-nixos
installations of nix and libgl... I quiver in fear.

/sjm



On Wed, Mar 2, 2016 at 4:56 AM, Oliver Charles <ollie at ocharles.org.uk> wrote:
> The only way I've had luck with NixOS and OpenGL in the past is by building
> anything that needs OpenGL against the same set of nixpkgs that the system
> is currently *running* as. Maybe that will help?
>
> On Tue, Mar 1, 2016 at 5:01 PM stewart mackenzie <setori88 at gmail.com> wrote:
>>
>> Hi Herwig,
>>
>> Okay, Herwg, this is what's driving me insane:
>>
>> https://github.com/NixOS/nixpkgs/blob/master/pkgs/development/libraries/mesa/default.nix#L27
>>
>> Yes, I do not want to link to the stock nix libGL because it has
>> STATIC_TLS enabled without which would result in a 10% performance
>> hit. So if you're playing hardcore games you want STATIC_TLS.
>>
>> I on the other hand do not want STATIC_TLS because if I have it
>> enabled it throws this error ""SDL error: Failed loading libGL.so.1:
>> dlopen: cannot load any more object with static TLS"', hence I need to
>> recompile it ensuring no initial-exec (which == STATIC_TLS) is
>> enabled.
>>
>> As I'm running a simple 2D windowing system (conrod) it's more than
>> adequate for my needs.
>>
>> Excellent, much appreciated Herwig.
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