<indexterm><primary>FreeBSD</primary><secondary>shared library</secondary></indexterm>
    </term>
    <listitem>
     <para>
      The compiler flag to create <acronym>PIC</acronym> is
      <option>-fPIC</option>.  To create shared libraries the compiler
      flag is <option>-shared</option>.
<programlisting>
cc -fPIC -c foo.c
cc -shared -o foo.so foo.o
</programlisting>
      This is applicable as of version 13.0 of
      <systemitem class="osname">FreeBSD</systemitem>, older versions used
      the <filename>gcc</filename> compiler.
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term>
     <systemitem class="osname">Linux</systemitem>
     <indexterm><primary>Linux</primary><secondary>shared library</secondary></indexterm>
    </term>
    <listitem>
     <para>
      The compiler flag to create <acronym>PIC</acronym> is
      <option>-fPIC</option>.
      The compiler flag to create a shared library is
      <option>-shared</option>.  A complete example looks like this:
<programlisting>
cc -fPIC -c foo.c
cc -shared -o foo.so foo.o
</programlisting>
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term>
     <systemitem class="osname">macOS</systemitem>
     <indexterm><primary>macOS</primary><secondary>shared library</secondary></indexterm>
    </term>
    <listitem>
     <para>
      Here is an example.  It assumes the developer tools are installed.
<programlisting>
cc -c foo.c
cc -bundle -flat_namespace -undefined suppress -o foo.so foo.o
</programlisting>
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term>
     <systemitem class="osname">NetBSD</systemitem>
     <indexterm><primary>NetBSD</primary><secondary>shared library</secondary></indexterm>
    </term>
    <listitem>
     <para>
      The compiler flag to create <acronym>PIC</acronym> is
      <option>-fPIC</option>.  For <acronym>ELF</acronym> systems, the
      compiler with the flag <option>-shared</option> is used to link
      shared libraries.  On the older non-ELF systems, <literal>ld
      -Bshareable</literal> is used.
<programlisting>
gcc -fPIC -c foo.c
gcc -shared -o foo.so foo.o
</programlisting>
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term>