From the auto-build logs:
cd /home/pd/auto-build/pd-extended/externals/tclpd && make make[3]: Entering directory `/home/pd/auto-build/pd-extended/externals/ tclpd' swig -v -c++ -tcl -o tcl_wrap.cxx -I../../pd/src -I/usr/include -I/usr/ include/tcl8.4 /usr/include/tcl8.5 tcl.i swig error : Unrecognized option /usr/include/tcl8.5 Use 'swig -help' for available options.
.hc
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"It is convenient to imagine a power beyond us because that means we don't have to examine our own lives.", from "The Idols of Environmentalism", by Curtis White