If perl cannot be found, then do not allow a build of the docbook documentation since all backends for that build require perl.
If perl cannot be found, then do not allow a build of the docbook
documentation since all backends for that build require perl.


svn path=/trunk/; revision=12485

FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot