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Copies published by the Free Software Foundation raise funds for GNU development. --> <!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ --> <head> <title>Add Options (GNU Compiler Collection (GCC) Internals)</title> <meta name="description" content="Add Options (GNU Compiler Collection (GCC) Internals)"> <meta name="keywords" content="Add Options (GNU Compiler Collection (GCC) Internals)"> <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="Option-Index.html#Option-Index" rel="index" title="Option Index"> <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> <link href="Test-Directives.html#Test-Directives" rel="up" title="Test Directives"> <link href="Require-Support.html#Require-Support" rel="next" title="Require Support"> <link href="Effective_002dTarget-Keywords.html#Effective_002dTarget-Keywords" rel="prev" title="Effective-Target Keywords"> <style type="text/css"> <!-- a.summary-letter {text-decoration: none} blockquote.indentedblock {margin-right: 0em} blockquote.smallindentedblock {margin-right: 0em; font-size: smaller} blockquote.smallquotation {font-size: smaller} div.display {margin-left: 3.2em} div.example {margin-left: 3.2em} div.lisp {margin-left: 3.2em} div.smalldisplay {margin-left: 3.2em} div.smallexample {margin-left: 3.2em} 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.nolinebreak {white-space: nowrap} span.roman {font-family: initial; font-weight: normal} span.sansserif {font-family: sans-serif; font-weight: normal} ul.no-bullet {list-style: none} --> </style> </head> <body lang="en"> <a name="Add-Options"></a> <div class="header"> <p> Next: <a href="Require-Support.html#Require-Support" accesskey="n" rel="next">Require Support</a>, Previous: <a href="Effective_002dTarget-Keywords.html#Effective_002dTarget-Keywords" accesskey="p" rel="prev">Effective-Target Keywords</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> </div> <hr> <a name="Features-for-dg_002dadd_002doptions"></a> <h4 class="subsection">7.2.4 Features for <code>dg-add-options</code></h4> <p>The supported values of <var>feature</var> for directive <code>dg-add-options</code> are: </p> <dl compact="compact"> <dt><code>arm_fp</code></dt> <dd><p><code>__ARM_FP</code> definition. Only ARM targets support this feature, and only then in certain modes; see the <a href="Effective_002dTarget-Keywords.html#arm_005ffp_005fok">arm_fp_ok effective target keyword</a>. </p> </dd> <dt><code>arm_neon</code></dt> <dd><p>NEON support. Only ARM targets support this feature, and only then in certain modes; see the <a href="Effective_002dTarget-Keywords.html#arm_005fneon_005fok">arm_neon_ok effective target keyword</a>. </p> </dd> <dt><code>arm_fp16</code></dt> <dd><p>VFP half-precision floating point support. This does not select the FP16 format; for that, use <a href="#arm_005ffp16_005fieee">arm_fp16_ieee</a> or <a href="#arm_005ffp16_005falternative">arm_fp16_alternative</a> instead. This feature is only supported by ARM targets and then only in certain modes; see the <a href="Effective_002dTarget-Keywords.html#arm_005ffp16_005fok">arm_fp16_ok effective target keyword</a>. </p> </dd> <dt><code>arm_fp16_ieee</code></dt> <dd><a name="arm_005ffp16_005fieee"></a><p>ARM IEEE 754-2008 format VFP half-precision floating point support. This feature is only supported by ARM targets and then only in certain modes; see the <a href="Effective_002dTarget-Keywords.html#arm_005ffp16_005fok">arm_fp16_ok effective target keyword</a>. </p> </dd> <dt><code>arm_fp16_alternative</code></dt> <dd><a name="arm_005ffp16_005falternative"></a><p>ARM Alternative format VFP half-precision floating point support. This feature is only supported by ARM targets and then only in certain modes; see the <a href="Effective_002dTarget-Keywords.html#arm_005ffp16_005fok">arm_fp16_ok effective target keyword</a>. </p> </dd> <dt><code>arm_neon_fp16</code></dt> <dd><p>NEON and half-precision floating point support. Only ARM targets support this feature, and only then in certain modes; see the <a href="Effective_002dTarget-Keywords.html#arm_005fneon_005ffp16_005fok">arm_neon_fp16_ok effective target keyword</a>. </p> </dd> <dt><code>arm_vfp3</code></dt> <dd><p>arm vfp3 floating point support; see the <a href="Effective_002dTarget-Keywords.html#arm_005fvfp3_005fok">arm_vfp3_ok effective target keyword</a>. </p> </dd> <dt><code>arm_v8_1a_neon</code></dt> <dd><p>Add options for ARMv8.1-A with Adv.SIMD support, if this is supported by the target; see the <a href="Effective_002dTarget-Keywords.html#arm_005fv8_005f1a_005fneon_005fok">arm_v8_1a_neon_ok</a> effective target keyword. </p> </dd> <dt><code>arm_v8_2a_fp16_scalar</code></dt> <dd><p>Add options for ARMv8.2-A with scalar FP16 support, if this is supported by the target; see the <a href="Effective_002dTarget-Keywords.html#arm_005fv8_005f2a_005ffp16_005fscalar_005fok">arm_v8_2a_fp16_scalar_ok</a> effective target keyword. </p> </dd> <dt><code>arm_v8_2a_fp16_neon</code></dt> <dd><p>Add options for ARMv8.2-A with Adv.SIMD FP16 support, if this is supported by the target; see the <a href="Effective_002dTarget-Keywords.html#arm_005fv8_005f2a_005ffp16_005fneon_005fok">arm_v8_2a_fp16_neon_ok</a> effective target keyword. </p> </dd> <dt><code>arm_v8_2a_dotprod_neon</code></dt> <dd><p>Add options for ARMv8.2-A with Adv.SIMD Dot Product support, if this is supported by the target; see the <a href="Effective_002dTarget-Keywords.html#arm_005fv8_005f2a_005fdotprod_005fneon_005fok">arm_v8_2a_dotprod_neon_ok</a> effective target keyword. </p> </dd> <dt><code>arm_fp16fml_neon</code></dt> <dd><p>Add options to enable generation of the <code>VFMAL</code> and <code>VFMSL</code> instructions, if this is supported by the target; see the <a href="Effective_002dTarget-Keywords.html#arm_005ffp16fml_005fneon_005fok">arm_fp16fml_neon_ok</a> effective target keyword. </p> </dd> <dt><code>bind_pic_locally</code></dt> <dd><p>Add the target-specific flags needed to enable functions to bind locally when using pic/PIC passes in the testsuite. </p> </dd> <dt><code>c99_runtime</code></dt> <dd><p>Add the target-specific flags needed to access the C99 runtime. </p> </dd> <dt><code>float<var>n</var></code></dt> <dd><p>Add the target-specific flags needed to use the <code>_Float<var>n</var></code> type. </p> </dd> <dt><code>float<var>n</var>x</code></dt> <dd><p>Add the target-specific flags needed to use the <code>_Float<var>n</var>x</code> type. </p> </dd> <dt><code>ieee</code></dt> <dd><p>Add the target-specific flags needed to enable full IEEE compliance mode. </p> </dd> <dt><code>mips16_attribute</code></dt> <dd><p><code>mips16</code> function attributes. Only MIPS targets support this feature, and only then in certain modes. </p> </dd> <dt><code>stack_size</code></dt> <dd><a name="stack_005fsize_005fao"></a><p>Add the flags needed to define macro STACK_SIZE and set it to the stack size limit associated with the <a href="Effective_002dTarget-Keywords.html#stack_005fsize_005fet"><code>stack_size</code> effective target</a>. </p> </dd> <dt><code>tls</code></dt> <dd><p>Add the target-specific flags needed to use thread-local storage. </p></dd> </dl> <hr> <div class="header"> <p> Next: <a href="Require-Support.html#Require-Support" accesskey="n" rel="next">Require Support</a>, Previous: <a href="Effective_002dTarget-Keywords.html#Effective_002dTarget-Keywords" accesskey="p" rel="prev">Effective-Target Keywords</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> </div> </body> </html>