ot fully POSIX-compatible, and in multi-unit encoding
domains it is probably even less compatible.
</p>
<p>
The descriptions below use the actual names of the functions, but, as described
above, the standard POSIX names (without the <b>pcre2_</b> prefix) may also be
used.
</p>
<h2><a name="SEC4" href="#TOC1">COMPILING A PATTERN</a></h2>
<p>
The function <b>pcre2_regcomp()</b> is called to compile a pattern into an
internal form. By default, the pattern is a C string terminated by a binary
zero (but see REG_