Derelict and QtOpengl segfolt together.

eldar · Joined: 14 Jun 2008 Posts: 101 Location: Ufa, Russia

Started wrapping some Qt functionality - for some reason when creating and displaying Qt openGL widget when derelict libraried are linked(even not loaded) program segfolts. Can somebody point where can be the issue?

Cyborg16 · Joined: 28 Apr 2007 Posts: 39

I guess you've solved it? I doubt anyone could help without more info anyway.

eldar · Joined: 14 Jun 2008 Posts: 101 Location: Ufa, Russia

Actually not. I simply export (C) couple of opengl functions and manually linked my app with opengl libs. I guess derelict opengl context conflicts in some way with that of Qt. I am now working on Qt port, I am going to work on this problem later.

aldacron · Posted: Sat Nov 22, 2008 8:52 pm Post subject:

eldar · Joined: 14 Jun 2008 Posts: 101 Location: Ufa, Russia

with pre-release of qtd I was able to check once again - and the problem is still there. What can be the cause of this problem and what additional information should I provide, that it can be solved?

aldacron · Posted: Sun Feb 08, 2009 4:50 am Post subject:

The command line you use to compile will be helpful, for starters. Also, does the segfault occur before or after calling any OpenGL functions?

If I were to take a wild guess, it would be that the OpenGL library is getting linked in at compile time. Linking with libraries that Derelict loads has been known to cause crashes (and isn't necessary anyway). That's just a guess, though.
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eldar · Joined: 14 Jun 2008 Posts: 101 Location: Ufa, Russia

I use DSSS, build flags are something like this:
-L-ldl -L-lQtGui -L-lQtCore -L-lQtOpenGL
Segfault occurs before windows are created, most likely it happens during DerelictGL.load(); DerelictGLU.load();
There is no crash if I don't link against libQtOpenGL of course.

aldacron · Posted: Mon Feb 09, 2009 9:59 pm Post subject:

eldar · Joined: 14 Jun 2008 Posts: 101 Location: Ufa, Russia

but maybe it is possible to add a switch to Derelict so that it doesn't load a library, and only loads symbols. This could be not a default behaviour of course, but rather an option. Is it possible?

aldacron · Posted: Sat Feb 21, 2009 11:55 pm Post subject:

aldacron · Posted: Fri Mar 13, 2009 8:15 pm Post subject:

eldar · Joined: 14 Jun 2008 Posts: 101 Location: Ufa, Russia

I export them in order to get something working because I can't use derelict Smile

If you want to play, installation of QtD on linux is not that difficult. You will need Qt 4.4 for that.

aldacron · Posted: Sat Mar 14, 2009 10:53 am Post subject:

eldar · Joined: 14 Jun 2008 Posts: 101 Location: Ufa, Russia

You could also try QtD on windows, it works to the same extent as on linux. You will need Qt 4.4.3 for that and mingw 3.81

aldacron · Posted: Wed Mar 18, 2009 7:31 pm Post subject:

Does the segfault occur on Windows? I was under the impression it's a problem only on Linux.
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