\begingroup
\catcode`\&=12
\catcode`\_=12
\catcode`\$=12
\catcode`\#=12
\catcode`\%=12
\catcode`\^=13
\catcode`\~=13
\gdef\vers{2.8.0}
\gdef\includedir{/usr/local/include}
\gdef\libdir{/usr/local/lib}
\gdef\datadir{/usr/local/share/pari}
\endgroup
