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| <a name="Require-Support"></a> |
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| <a name="Variants-of-dg_002drequire_002dsupport"></a> |
| <h4 class="subsection">7.2.5 Variants of <code>dg-require-<var>support</var></code></h4> |
| |
| <p>A few of the <code>dg-require</code> directives take arguments. |
| </p> |
| <dl compact="compact"> |
| <dt><code>dg-require-iconv <var>codeset</var></code></dt> |
| <dd><p>Skip the test if the target does not support iconv. <var>codeset</var> is |
| the codeset to convert to. |
| </p> |
| </dd> |
| <dt><code>dg-require-profiling <var>profopt</var></code></dt> |
| <dd><p>Skip the test if the target does not support profiling with option |
| <var>profopt</var>. |
| </p> |
| </dd> |
| <dt><code>dg-require-visibility <var>vis</var></code></dt> |
| <dd><p>Skip the test if the target does not support the <code>visibility</code> attribute. |
| If <var>vis</var> is <code>""</code>, support for <code>visibility("hidden")</code> is |
| checked, for <code>visibility("<var>vis</var>")</code> otherwise. |
| </p></dd> |
| </dl> |
| |
| <p>The original <code>dg-require</code> directives were defined before there |
| was support for effective-target keywords. The directives that do not |
| take arguments could be replaced with effective-target keywords. |
| </p> |
| <dl compact="compact"> |
| <dt><code>dg-require-alias ""</code></dt> |
| <dd><p>Skip the test if the target does not support the ‘<samp>alias</samp>’ attribute. |
| </p> |
| </dd> |
| <dt><code>dg-require-ascii-locale ""</code></dt> |
| <dd><p>Skip the test if the host does not support an ASCII locale. |
| </p> |
| </dd> |
| <dt><code>dg-require-compat-dfp ""</code></dt> |
| <dd><p>Skip this test unless both compilers in a <samp>compat</samp> testsuite |
| support decimal floating point. |
| </p> |
| </dd> |
| <dt><code>dg-require-cxa-atexit ""</code></dt> |
| <dd><p>Skip the test if the target does not support <code>__cxa_atexit</code>. |
| This is equivalent to <code>dg-require-effective-target cxa_atexit</code>. |
| </p> |
| </dd> |
| <dt><code>dg-require-dll ""</code></dt> |
| <dd><p>Skip the test if the target does not support DLL attributes. |
| </p> |
| </dd> |
| <dt><code>dg-require-fork ""</code></dt> |
| <dd><p>Skip the test if the target does not support <code>fork</code>. |
| </p> |
| </dd> |
| <dt><code>dg-require-gc-sections ""</code></dt> |
| <dd><p>Skip the test if the target’s linker does not support the |
| <code>--gc-sections</code> flags. |
| This is equivalent to <code>dg-require-effective-target gc-sections</code>. |
| </p> |
| </dd> |
| <dt><code>dg-require-host-local ""</code></dt> |
| <dd><p>Skip the test if the host is remote, rather than the same as the build |
| system. Some tests are incompatible with DejaGnu’s handling of remote |
| hosts, which involves copying the source file to the host and compiling |
| it with a relative path and "<code>-o a.out</code>". |
| </p> |
| </dd> |
| <dt><code>dg-require-mkfifo ""</code></dt> |
| <dd><p>Skip the test if the target does not support <code>mkfifo</code>. |
| </p> |
| </dd> |
| <dt><code>dg-require-named-sections ""</code></dt> |
| <dd><p>Skip the test is the target does not support named sections. |
| This is equivalent to <code>dg-require-effective-target named_sections</code>. |
| </p> |
| </dd> |
| <dt><code>dg-require-weak ""</code></dt> |
| <dd><p>Skip the test if the target does not support weak symbols. |
| </p> |
| </dd> |
| <dt><code>dg-require-weak-override ""</code></dt> |
| <dd><p>Skip the test if the target does not support overriding weak symbols. |
| </p></dd> |
| </dl> |
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