118 lines
6.8 KiB
HTML
118 lines
6.8 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- Copyright (C) 1999-2016 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being "Funding Free Software", the Front-Cover
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Texts being (a) (see below), and with the Back-Cover Texts being (b)
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(see below). A copy of the license is included in the section entitled
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"GNU Free Documentation License".
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(a) The FSF's Front-Cover Text is:
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A GNU Manual
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(b) The FSF's Back-Cover Text is:
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You have freedom to copy and modify this GNU Manual, like GNU
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software. Copies published by the Free Software Foundation raise
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funds for GNU development. -->
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<!-- Created by GNU Texinfo 5.2, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>The GNU Fortran Compiler: Runtime</title>
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<meta name="description" content="The GNU Fortran Compiler: Runtime">
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<meta name="keywords" content="The GNU Fortran Compiler: Runtime">
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<meta name="resource-type" content="document">
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<meta name="distribution" content="global">
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<meta name="Generator" content="makeinfo">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Option-Index.html#Option-Index" rel="index" title="Option Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="index.html#Top" rel="up" title="Top">
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<link href="TMPDIR.html#TMPDIR" rel="next" title="TMPDIR">
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<link href="Environment-Variables.html#Environment-Variables" rel="prev" title="Environment Variables">
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<style type="text/css">
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-->
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</style>
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</head>
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<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
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<a name="Runtime"></a>
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<div class="header">
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<p>
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Next: <a href="Fortran-2003-and-2008-status.html#Fortran-2003-and-2008-status" accesskey="n" rel="next">Fortran 2003 and 2008 status</a>, Previous: <a href="Invoking-GNU-Fortran.html#Invoking-GNU-Fortran" accesskey="p" rel="prev">Invoking GNU Fortran</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="Runtime_003a-Influencing-runtime-behavior-with-environment-variables"></a>
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<h2 class="chapter">3 Runtime: Influencing runtime behavior with environment variables</h2>
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<a name="index-environment-variable-1"></a>
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<p>The behavior of the <code>gfortran</code> can be influenced by
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environment variables.
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</p>
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<p>Malformed environment variables are silently ignored.
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</p>
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<table class="menu" border="0" cellspacing="0">
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<tr><td align="left" valign="top">• <a href="TMPDIR.html#TMPDIR" accesskey="1">TMPDIR</a>:</td><td> </td><td align="left" valign="top">Directory for scratch files
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</td></tr>
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<tr><td align="left" valign="top">• <a href="GFORTRAN_005fSTDIN_005fUNIT.html#GFORTRAN_005fSTDIN_005fUNIT" accesskey="2">GFORTRAN_STDIN_UNIT</a>:</td><td> </td><td align="left" valign="top">Unit number for standard input
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</td></tr>
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<tr><td align="left" valign="top">• <a href="GFORTRAN_005fSTDOUT_005fUNIT.html#GFORTRAN_005fSTDOUT_005fUNIT" accesskey="3">GFORTRAN_STDOUT_UNIT</a>:</td><td> </td><td align="left" valign="top">Unit number for standard output
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</td></tr>
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<tr><td align="left" valign="top">• <a href="GFORTRAN_005fSTDERR_005fUNIT.html#GFORTRAN_005fSTDERR_005fUNIT" accesskey="4">GFORTRAN_STDERR_UNIT</a>:</td><td> </td><td align="left" valign="top">Unit number for standard error
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</td></tr>
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<tr><td align="left" valign="top">• <a href="GFORTRAN_005fUNBUFFERED_005fALL.html#GFORTRAN_005fUNBUFFERED_005fALL" accesskey="5">GFORTRAN_UNBUFFERED_ALL</a>:</td><td> </td><td align="left" valign="top">Do not buffer I/O for all units.
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</td></tr>
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<tr><td align="left" valign="top">• <a href="GFORTRAN_005fUNBUFFERED_005fPRECONNECTED.html#GFORTRAN_005fUNBUFFERED_005fPRECONNECTED" accesskey="6">GFORTRAN_UNBUFFERED_PRECONNECTED</a>:</td><td> </td><td align="left" valign="top">Do not buffer I/O for preconnected units.
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</td></tr>
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<tr><td align="left" valign="top">• <a href="GFORTRAN_005fSHOW_005fLOCUS.html#GFORTRAN_005fSHOW_005fLOCUS" accesskey="7">GFORTRAN_SHOW_LOCUS</a>:</td><td> </td><td align="left" valign="top">Show location for runtime errors
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</td></tr>
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<tr><td align="left" valign="top">• <a href="GFORTRAN_005fOPTIONAL_005fPLUS.html#GFORTRAN_005fOPTIONAL_005fPLUS" accesskey="8">GFORTRAN_OPTIONAL_PLUS</a>:</td><td> </td><td align="left" valign="top">Print leading + where permitted
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</td></tr>
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<tr><td align="left" valign="top">• <a href="GFORTRAN_005fDEFAULT_005fRECL.html#GFORTRAN_005fDEFAULT_005fRECL" accesskey="9">GFORTRAN_DEFAULT_RECL</a>:</td><td> </td><td align="left" valign="top">Default record length for new files
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</td></tr>
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<tr><td align="left" valign="top">• <a href="GFORTRAN_005fLIST_005fSEPARATOR.html#GFORTRAN_005fLIST_005fSEPARATOR">GFORTRAN_LIST_SEPARATOR</a>:</td><td> </td><td align="left" valign="top">Separator for list output
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</td></tr>
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<tr><td align="left" valign="top">• <a href="GFORTRAN_005fCONVERT_005fUNIT.html#GFORTRAN_005fCONVERT_005fUNIT">GFORTRAN_CONVERT_UNIT</a>:</td><td> </td><td align="left" valign="top">Set endianness for unformatted I/O
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</td></tr>
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<tr><td align="left" valign="top">• <a href="GFORTRAN_005fERROR_005fBACKTRACE.html#GFORTRAN_005fERROR_005fBACKTRACE">GFORTRAN_ERROR_BACKTRACE</a>:</td><td> </td><td align="left" valign="top">Show backtrace on run-time errors
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</td></tr>
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</table>
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</body>
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</html>
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