.. Copyright 1988-2022 Free Software Foundation, Inc. This is part of the GCC manual. For copying conditions, see the copyright.rst file. .. index:: environment variable .. _runtime: Runtime: Influencing runtime behavior with environment variables ----------------------------------------------------------------- The behavior of the :command:`gfortran` can be influenced by environment variables. Malformed environment variables are silently ignored. .. toctree:: :maxdepth: 2 runtime/tmpdir runtime/gfortranstdinunit runtime/gfortranstdoutunit runtime/gfortranstderrunit runtime/gfortranunbufferedall runtime/gfortranunbufferedpreconnected runtime/gfortranshowlocus runtime/gfortranoptionalplus runtime/gfortranlistseparator runtime/gfortranconvertunit runtime/gfortranerrorbacktrace runtime/gfortranformattedbuffersize runtime/gfortranunformattedbuffersize