t is
         <TT
CLASS="FILENAME"
><TT
CLASS="REPLACEABLE"
><I
>EXEC-PREFIX</I
></TT
>/lib</TT
>.
        </P
></DD
><DT
><TT
CLASS="OPTION"
>--includedir=<TT
CLASS="REPLACEABLE"
><I
>DIRECTORY</I
></TT
></TT
></DT
><DD
><P
>         Sets the directory for installing C and C++ header files. The
         default is <TT
CLASS="FILENAME"
><TT
CLASS="REPLACEABLE"
><I
>PREFIX</I
></TT
>/include</TT
>.
        </P
></DD
><DT
><TT
CLASS="OPTION"
>--datarootdir=<TT
CLASS="REPLACEABLE"
><I
>DIRECTORY</I
></TT
></TT