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<title>def file format - GNU Binary Utilities</title>
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<a name="def-file-format"></a>Up:&nbsp;<a rel="up" accesskey="u" href="dlltool.html#dlltool">dlltool</a>
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<h3 class="section">14.1 The format of the <span class="command">dlltool</span> <span class="file">.def</span> file</h3>
<p>A <span class="file">.def</span> file contains any number of the following commands:
<dl>
<dt><code>NAME</code> <var>name</var> <code>[ ,</code> <var>base</var> <code>]</code><dd>The result is going to be named <var>name</var><code>.exe</code>.
<br><dt><code>LIBRARY</code> <var>name</var> <code>[ ,</code> <var>base</var> <code>]</code><dd>The result is going to be named <var>name</var><code>.dll</code>.
<br><dt><code>EXPORTS ( ( (</code> <var>name1</var> <code>[ = </code> <var>name2</var> <code>] ) | ( </code> <var>name1</var> <code>=</code> <var>module-name</var> <code>.</code> <var>external-name</var> <code>) )</code><br><dt><code>[</code> <var>integer</var> <code>] [ NONAME ] [ CONSTANT ] [ DATA ] [ PRIVATE ] ) *</code><dd>Declares <var>name1</var> as an exported symbol from the DLL, with optional
ordinal number <var>integer</var>, or declares <var>name1</var> as an alias
(forward) of the function <var>external-name</var> in the DLL
<var>module-name</var>.
<br><dt><code>IMPORTS ( (</code> <var>internal-name</var> <code>=</code> <var>module-name</var> <code>.</code> <var>integer</var> <code>) | [</code> <var>internal-name</var> <code>= ]</code> <var>module-name</var> <code>.</code> <var>external-name</var> <code>) ) *</code><dd>Declares that <var>external-name</var> or the exported function whose
ordinal number is <var>integer</var> is to be imported from the file
<var>module-name</var>. If <var>internal-name</var> is specified then this is
the name that the imported function will be referred to in the body of
the DLL.
<br><dt><code>DESCRIPTION</code> <var>string</var><dd>Puts <var>string</var> into the output <span class="file">.exp</span> file in the
<code>.rdata</code> section.
<br><dt><code>STACKSIZE</code> <var>number-reserve</var> <code>[, </code> <var>number-commit</var> <code>]</code><br><dt><code>HEAPSIZE</code> <var>number-reserve</var> <code>[, </code> <var>number-commit</var> <code>]</code><dd>Generates <code>--stack</code> or <code>--heap</code>
<var>number-reserve</var>,<var>number-commit</var> in the output <code>.drectve</code>
section. The linker will see this and act upon it.
<br><dt><code>CODE</code> <var>attr</var> <code>+</code><br><dt><code>DATA</code> <var>attr</var> <code>+</code><br><dt><code>SECTIONS (</code> <var>section-name</var> <var>attr</var><code> + ) *</code><dd>Generates <code>--attr</code> <var>section-name</var> <var>attr</var> in the output
<code>.drectve</code> section, where <var>attr</var> is one of <code>READ</code>,
<code>WRITE</code>, <code>EXECUTE</code> or <code>SHARED</code>. The linker will see
this and act upon it.
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