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<sect2>
<title>Command explanations</title>

<para><userinput>CPPFLAGS=-D_GNU_SOURCE: </userinput>
Adding <userinput>-D_GNU_SOURCE</userinput> to CPPFLAGS command before
we configure patch fixes installation of the package on PPC and m68k
platforms (that we know of).  It also doesn't hurt compilation on other
platforms (such as x86) so we do it by default.</para>

</sect2>