.. envvar:: GALLIUM_TRACE <string> ("")
-If set, this variable will cause the :ref:`Trace` output to be written to the
+If set, this variable will cause the :ref:`trace` output to be written to the
specified file. Paths may be relative or absolute; relative paths are relative
to the working directory. For example, setting it to "trace.xml" will cause
the trace to be written to a file of the same name in the working directory.
Number of threads that the llvmpipe driver should use.
+.. envvar:: FD_MESA_DEBUG <flags> (0x0)
+
+Debug :ref:`flags` for the freedreno driver.
+
.. _flags: