On 7/26/07, Allen Bierbaum <[EMAIL PROTECTED]> wrote: > I have been fighting a seg fault and crash on OpenSG startup for about 2 > weeks. I finally tracked it down to a problem with function lookups in > OSGWindow.cpp. The problem was that my executable was not linked to a > GL library so the lookup code in OpenSG fellback to just trying to find > libGL.so on the system and pull the glXGetProcAddress symbol from there. > Normally this may work, but the library it found on my system was the > mesa library instead of the Nvidia library. This made all calls to the > looked up functions seg fault immediately. In other words, this > fallback is pretty fragile and when it does something wrong it is very > wrong and very difficult to track down. > > In an attempt to prevent something like this from happening again, I > just committed a patch to OSGWindow.cpp (see: > http://opensg.vrsource.org/trac/changeset/851 ) that adds support for > using glXGetProcAddress directly. > > I know I tried to get something like this in before and some people had > problems with it (because they were using 1.4 GLX headers and a 1.3 GLX > library), but I think we have to find a way to keep some code like this > in there. IMHO it is a bit crazy to ignore the most directly way we > have of looking up GL functions (ie. using the method directly from the > GL library that OpenSG is linked against). I don't want other people to > suffer through the pain I have had over the past weeks trying to track > this down. > > Does anyone have objections to this patch or any ideas on how to better > implement it?
I would rather it look up the correct GL library . Running bugle against opensg with some of the filters it offers(trace,validate) make the application crash. I wonder if it is related to what you are seeing. It was something I was not able to ever track down. -Dan ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Opensg-core mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/opensg-core
