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<h3 class="section">2.5 Inline functions</h3>
<p><a name="index-inline-functions-35"></a><a name="index-HAVE_005fINLINE-36"></a>The <code>inline</code> keyword is not part of the original ANSI C standard
(C89) and the library does not export any inline function definitions by
default. However, the library provides optional inline versions of
performance-critical functions by conditional compilation. The inline
versions of these functions can be included by defining the macro
<code>HAVE_INLINE</code> when compiling an application,
<pre class="example"> $ gcc -Wall -c -DHAVE_INLINE example.c
</pre>
<p class="noindent">If you use <code>autoconf</code> this macro can be defined automatically. If
you do not define the macro <code>HAVE_INLINE</code> then the slower
non-inlined versions of the functions will be used instead.
<p>Note that the actual usage of the inline keyword is <code>extern
inline</code>, which eliminates unnecessary function definitions in <span class="sc">gcc</span>.
If the form <code>extern inline</code> causes problems with other compilers a
stricter autoconf test can be used, see <a href="Autoconf-Macros.html">Autoconf Macros</a>.
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