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<title>The GNU Fortran Compiler: GFORTRAN_ERROR_BACKTRACE</title>

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<a name="GFORTRAN_005fERROR_005fBACKTRACE_002d_002d_002dShow-backtrace-on-run_002dtime-errors"></a>
<h3 class="section">3.12 <code>GFORTRAN_ERROR_BACKTRACE</code>&mdash;Show backtrace on run-time errors</h3>

<p>If the <code>GFORTRAN_ERROR_BACKTRACE</code> variable is set to &lsquo;<samp>y</samp>&rsquo;,
&lsquo;<samp>Y</samp>&rsquo; or &lsquo;<samp>1</samp>&rsquo; (only the first letter is relevant) then a
backtrace is printed when a serious run-time error occurs.  To disable
the backtracing, set the variable to &lsquo;<samp>n</samp>&rsquo;, &lsquo;<samp>N</samp>&rsquo;, &lsquo;<samp>0</samp>&rsquo;.
Default is to print a backtrace unless the <samp>-fno-backtrace</samp>
compile option was used.
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