is the default C&nbsp;library namespace &mdash; note the
uppercase <tt>'C'</tt>. It binds to the default set of symbols or
libraries on the target system. These are more or less the same as a
C&nbsp;compiler would offer by default, without specifying extra link
libraries.
</p>
<p>
On POSIX systems, this binds to symbols in the default or global
namespace. This includes all exported symbols from the executable and
any libraries loaded into the global namespace. This includes at least
<tt>libc</tt>, <tt>libm<