huangmeng
/
Embedded_AI


			
							12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394
							<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<!-- This file documents the GNU linker LD
(GNU Binutils)
version 2.28.

Copyright (C) 1991-2017 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". -->
<!-- Created by GNU Texinfo 5.2, http://www.gnu.org/software/texinfo/ -->
<head>
<title>LD: Symbols</title>

<meta name="description" content="LD: Symbols">
<meta name="keywords" content="LD: Symbols">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="makeinfo">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<link href="index.html#Top" rel="start" title="Top">
<link href="LD-Index.html#LD-Index" rel="index" title="LD Index">
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
<link href="Expressions.html#Expressions" rel="up" title="Expressions">
<link href="Orphan-Sections.html#Orphan-Sections" rel="next" title="Orphan Sections">
<link href="Symbolic-Constants.html#Symbolic-Constants" rel="prev" title="Symbolic Constants">
<style type="text/css">
<!--
a.summary-letter {text-decoration: none}
blockquote.smallquotation {font-size: smaller}
div.display {margin-left: 3.2em}
div.example {margin-left: 3.2em}
div.indentedblock {margin-left: 3.2em}
div.lisp {margin-left: 3.2em}
div.smalldisplay {margin-left: 3.2em}
div.smallexample {margin-left: 3.2em}
div.smallindentedblock {margin-left: 3.2em; font-size: smaller}
div.smalllisp {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}
pre.smalldisplay {font-family: inherit; font-size: smaller}
pre.smallexample {font-size: smaller}
pre.smallformat {font-family: inherit; font-size: smaller}
pre.smalllisp {font-size: smaller}
span.nocodebreak {white-space:nowrap}
span.nolinebreak {white-space:nowrap}
span.roman {font-family:serif; font-weight:normal}
span.sansserif {font-family:sans-serif; font-weight:normal}
ul.no-bullet {list-style: none}
-->
</style>


</head>

<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
<a name="Symbols"></a>
<div class="header">
<p>
Next: <a href="Orphan-Sections.html#Orphan-Sections" accesskey="n" rel="next">Orphan Sections</a>, Previous: <a href="Symbolic-Constants.html#Symbolic-Constants" accesskey="p" rel="prev">Symbolic Constants</a>, Up: <a href="Expressions.html#Expressions" accesskey="u" rel="up">Expressions</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="LD-Index.html#LD-Index" title="Index" rel="index">Index</a>]</p>
</div>
<hr>
<a name="Symbol-Names"></a>
<h4 class="subsection">3.10.3 Symbol Names</h4>
<a name="index-symbol-names"></a>
<a name="index-names"></a>
<a name="index-quoted-symbol-names"></a>
<a name="index-_0022"></a>
<p>Unless quoted, symbol names start with a letter, underscore, or period
and may include letters, digits, underscores, periods, and hyphens.
Unquoted symbol names must not conflict with any keywords.  You can
specify a symbol which contains odd characters or has the same name as a
keyword by surrounding the symbol name in double quotes:
</p><div class="smallexample">
<pre class="smallexample">&quot;SECTION&quot; = 9;
&quot;with a space&quot; = &quot;also with a space&quot; + 10;
</pre></div>

<p>Since symbols can contain many non-alphabetic characters, it is safest
to delimit symbols with spaces.  For example, &lsquo;<samp>A-B</samp>&rsquo; is one symbol,
whereas &lsquo;<samp>A - B</samp>&rsquo; is an expression involving subtraction.
</p>


</body>
</html>