172 lines
7.2 KiB
HTML
172 lines
7.2 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) 1988-2016 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>GNU Compiler Collection (GCC) Internals: Require Support</title>
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<meta name="description" content="GNU Compiler Collection (GCC) Internals: Require Support">
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<meta name="keywords" content="GNU Compiler Collection (GCC) Internals: Require Support">
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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="Test-Directives.html#Test-Directives" rel="up" title="Test Directives">
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<link href="Final-Actions.html#Final-Actions" rel="next" title="Final Actions">
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<link href="Add-Options.html#Add-Options" rel="prev" title="Add Options">
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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="Require-Support"></a>
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<div class="header">
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<p>
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Next: <a href="Final-Actions.html#Final-Actions" accesskey="n" rel="next">Final Actions</a>, Previous: <a href="Add-Options.html#Add-Options" accesskey="p" rel="prev">Add Options</a>, Up: <a href="Test-Directives.html#Test-Directives" accesskey="u" rel="up">Test Directives</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="Variants-of-dg_002drequire_002dsupport"></a>
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<h4 class="subsection">7.2.5 Variants of <code>dg-require-<var>support</var></code></h4>
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<p>A few of the <code>dg-require</code> directives take arguments.
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</p>
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<dl compact="compact">
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<dt><code>dg-require-iconv <var>codeset</var></code></dt>
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<dd><p>Skip the test if the target does not support iconv. <var>codeset</var> is
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the codeset to convert to.
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</p>
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</dd>
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<dt><code>dg-require-profiling <var>profopt</var></code></dt>
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<dd><p>Skip the test if the target does not support profiling with option
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<var>profopt</var>.
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</p>
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</dd>
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<dt><code>dg-require-visibility <var>vis</var></code></dt>
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<dd><p>Skip the test if the target does not support the <code>visibility</code> attribute.
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If <var>vis</var> is <code>""</code>, support for <code>visibility("hidden")</code> is
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checked, for <code>visibility("<var>vis</var>")</code> otherwise.
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</p></dd>
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</dl>
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<p>The original <code>dg-require</code> directives were defined before there
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was support for effective-target keywords. The directives that do not
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take arguments could be replaced with effective-target keywords.
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</p>
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<dl compact="compact">
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<dt><code>dg-require-alias ""</code></dt>
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<dd><p>Skip the test if the target does not support the ‘<samp>alias</samp>’ attribute.
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</p>
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</dd>
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<dt><code>dg-require-ascii-locale ""</code></dt>
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<dd><p>Skip the test if the host does not support an ASCII locale.
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</p>
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</dd>
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<dt><code>dg-require-compat-dfp ""</code></dt>
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<dd><p>Skip this test unless both compilers in a <samp>compat</samp> testsuite
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support decimal floating point.
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</p>
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</dd>
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<dt><code>dg-require-cxa-atexit ""</code></dt>
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<dd><p>Skip the test if the target does not support <code>__cxa_atexit</code>.
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This is equivalent to <code>dg-require-effective-target cxa_atexit</code>.
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</p>
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</dd>
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<dt><code>dg-require-dll ""</code></dt>
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<dd><p>Skip the test if the target does not support DLL attributes.
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</p>
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</dd>
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<dt><code>dg-require-fork ""</code></dt>
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<dd><p>Skip the test if the target does not support <code>fork</code>.
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</p>
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</dd>
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<dt><code>dg-require-gc-sections ""</code></dt>
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<dd><p>Skip the test if the target’s linker does not support the
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<code>--gc-sections</code> flags.
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This is equivalent to <code>dg-require-effective-target gc-sections</code>.
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</p>
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</dd>
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<dt><code>dg-require-host-local ""</code></dt>
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<dd><p>Skip the test if the host is remote, rather than the same as the build
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system. Some tests are incompatible with DejaGnu’s handling of remote
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hosts, which involves copying the source file to the host and compiling
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it with a relative path and "<code>-o a.out</code>".
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</p>
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</dd>
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<dt><code>dg-require-mkfifo ""</code></dt>
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<dd><p>Skip the test if the target does not support <code>mkfifo</code>.
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</p>
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</dd>
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<dt><code>dg-require-named-sections ""</code></dt>
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<dd><p>Skip the test is the target does not support named sections.
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This is equivalent to <code>dg-require-effective-target named_sections</code>.
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</p>
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</dd>
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<dt><code>dg-require-weak ""</code></dt>
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<dd><p>Skip the test if the target does not support weak symbols.
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</p>
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</dd>
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<dt><code>dg-require-weak-override ""</code></dt>
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<dd><p>Skip the test if the target does not support overriding weak symbols.
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</p></dd>
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</dl>
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<hr>
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<div class="header">
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<p>
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Next: <a href="Final-Actions.html#Final-Actions" accesskey="n" rel="next">Final Actions</a>, Previous: <a href="Add-Options.html#Add-Options" accesskey="p" rel="prev">Add Options</a>, Up: <a href="Test-Directives.html#Test-Directives" accesskey="u" rel="up">Test Directives</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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</body>
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</html>
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