The Mesa 3D Graphics Library

Debugging Tips

   Normally Mesa (and OpenGL) records but does not notify the user of

   errors.  It is up to the application to call

   glGetError to check for errors.  Mesa supports an

   environment variable, MESA_DEBUG, to help with debugging.  If

   MESA_DEBUG is defined, a message will be printed to stdout whenever

   an error occurs.

   More extensive error checking is done when Mesa is compiled with the

   DEBUG symbol defined.  You'll have to edit the Make-config file and

   add -DDEBUG to the CFLAGS line for your system configuration.  You may

   also want to replace any optimization flags with the -g flag so you can

   use your debugger.  After you've edited Make-config type 'make clean'

   before recompiling.

   In your debugger you can set a breakpoint in _mesa_error() to trap Mesa

   errors.

   There is a display list printing/debugging facility.  See the end of

   src/dlist.c for details.