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Edit File: _0023line-and-TeX.html
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <!-- Created by GNU Texinfo 6.8, https://www.gnu.org/software/texinfo/ --> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <!-- This manual is for GNU Texinfo (version 6.8, 8 June 2021), a documentation system that can produce both online information and a printed manual from a single source using semantic markup. Copyright (C) 1988, 1990-1993, 1995-1999, 2001-2021 Free Software Foundation, Inc. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License". --> <title>#line and TeX (GNU Texinfo 6.8)</title> <meta name="description" content="#line and TeX (GNU Texinfo 6.8)"> <meta name="keywords" content="#line and TeX (GNU Texinfo 6.8)"> <meta name="resource-type" content="document"> <meta name="distribution" content="global"> <meta name="Generator" content="texi2any"> <meta name="viewport" content="width=device-width,initial-scale=1"> <link href="index.html" rel="start" title="Top"> <link href="Command-and-Variable-Index.html" rel="index" title="Command and Variable Index"> <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> <link href="External-Macro-Processors.html" rel="up" title="External Macro Processors"> <link href="_0023line-Syntax-Details.html" rel="next" title="#line Syntax Details"> <link href="_0023line-Directive.html" rel="prev" title="#line Directive"> <style type="text/css"> <!-- a.copiable-anchor {visibility: hidden; text-decoration: none; line-height: 0em} a.summary-letter {text-decoration: none} blockquote.indentedblock {margin-right: 0em} div.display {margin-left: 3.2em} div.example {margin-left: 3.2em} kbd {font-style: oblique} pre.display {font-family: inherit} pre.format {font-family: inherit} pre.menu-comment {font-family: serif} pre.menu-preformatted {font-family: serif} span.nolinebreak {white-space: nowrap} span.roman {font-family: initial; font-weight: normal} span.sansserif {font-family: sans-serif; font-weight: normal} span:hover a.copiable-anchor {visibility: visible} ul.no-bullet {list-style: none} --> </style> </head> <body lang="en"> <div class="subsection" id="g_t_0023line-and-TeX"> <div class="header"> <p> Next: <a href="_0023line-Syntax-Details.html" accesskey="n" rel="next">‘<samp>#line</samp>’ Syntax Details</a>, Previous: <a href="_0023line-Directive.html" accesskey="p" rel="prev">‘<samp>#line</samp>’ Directive</a>, Up: <a href="External-Macro-Processors.html" accesskey="u" rel="up">External Macro Processors: Line Directives</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Command-and-Variable-Index.html" title="Index" rel="index">Index</a>]</p> </div> <hr> <span id="g_t_0023line-and-TeX-1"></span><h4 class="subsection">16.6.2 ‘<samp>#line</samp>’ and TeX</h4> <span id="index-TeX-and-_0023line-directives"></span> <span id="index-_0023line-directive-1"></span> <p>As mentioned, <code>makeinfo</code> recognizes the ‘<samp>#line</samp>’ directives described in the previous section. However, <samp>texinfo.tex</samp> does not and cannot. Therefore, such a line will be incorrectly typeset verbatim if TeX sees it. The solution is to use <code>makeinfo</code>’s macro expansion options before running TeX. There are three approaches: </p> <ul> <li> If you run <code>texi2dvi</code> or its variants (see <a href="Format-with-texi2dvi.html">Format with <code>texi2dvi</code></a>), you can pass <samp>-E</samp> and <code>texi2dvi</code> will run <code>makeinfo</code> first to expand macros and eliminate ‘<samp>#line</samp>’. </li><li> If you run <code>makeinfo</code> or its variants (see <a href="Generic-Translator-texi2any.html"><code>texi2any</code>: The Generic Translator for Texinfo</a>), you can specify <samp>--no-ifinfo --iftex -E somefile.out</samp>, and then give <samp>somefile.out</samp> to <code>texi2dvi</code> in a separate command. </li><li> Or you can run <samp>makeinfo --dvi --Xopt -E</samp>. (Or <samp>--pdf</samp> instead of <samp>--dvi</samp>.) <code>makeinfo</code> will then call <code>texi2dvi -E</code>. </li></ul> <span id="index-errormsg_002c-and-line-numbers-in-TeX"></span> <p>One last caveat regarding use with TeX: since the <code>#line</code> directives are not recognized, the line numbers emitted by the <code>@errormsg{}</code> command (see <a href="Conditional-Commands.html">Conditional Commands</a>), or by TeX itself, are the (incorrect) line numbers from the derived file which TeX is reading, rather than the preprocessor-specified line numbers. This is another example of why we recommend running <code>makeinfo</code> for the best diagnostics (see <a href="makeinfo-Advantages.html"><code>makeinfo</code> Advantages</a>). </p> </div> </body> </html>