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The Mesa 3D Graphics Library
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<h1>Debugging Tips</h1>
<p>
Normally Mesa (and OpenGL) records but does not notify the user of
errors. It is up to the application to call
<code>glGetError</code> to check for errors. Mesa supports an
environment variable, <code>MESA_DEBUG</code>, to help with debugging. If
<code>MESA_DEBUG</code> is defined, a message will be printed to stdout
whenever an error occurs.
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<p>
More extensive error checking is done in DEBUG builds
(<code>--buildtype debug</code> for meson, <code>build=debug</code> for scons).
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<p>
In your debugger you can set a breakpoint in <code>_mesa_error()</code> to trap
Mesa errors.
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<p>
There is a display list printing/debugging facility. See the end of
<code>src/dlist.c</code> for details.
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