​Hi again,

Thank you Jack and Antoine for your suggestions. Still running into trouble....

I tried this manner of installing pd 46.6 again:

$ sudo apt-get update
 seemed to work fine.

when running: 
​$​
 sudo apt-get build-dep puredata

​I get:
reading... done
buidling depend... done
reading state.... done
E: You must put some 'source' URIs in your sources.list

then when I try to run:
$ autogen.sh

I get:
autoreconf: (12 of these)
then
configure.in.:104: error: possibly undefined macro: ACLIBTOOL_WIN32_DLL​
​If this token and others are legitimate, please use m4_pattern_allow.
See the Autoconf documentation​

configure.in:105: error: possibly undefined macro: AC_PROG_LIBTOOL
autoreconf: /usr/bin/autoconf failed with exit status: 1



Yes, now you need libtool.
Try something like :
$ sudo apt-get update
$ sudo apt-get build-dep puredata
and try to re-compile.
Or you can follow instructions given by Antoine.
++

Jack