python build failure on ubuntu

[Patrick Welche <prlw1%cam.ac.uk@localhost>]

Probably a local issue, as PR 53312 shows a different story.

This is ubuntu 16.04.4:

python27 and python36 give me:

ERROR: This package has set PKG_FAIL_REASON:
ERROR: No usable termcap library found on the system.

$ apt search termcap
Sorting... Done
Full Text Search... Done
colortest/xenial,xenial 20110624-4 all
  utilities to test color capabilities of terminal

ircii/xenial 20060725-1build1 amd64
  Internet Relay Chat client

joe/xenial 4.1-2 amd64
  user friendly full screen text editor

jupp/xenial 3.1.28-1build1 amd64
  user friendly full screen text editor


so nothing looks promising, and:

libtinfo-dev/xenial,now 6.0+20160213-1ubuntu1 amd64 [installed,automatic]
  developer's library for the low-level terminfo library

libtinfo5/xenial,now 6.0+20160213-1ubuntu1 amd64 [installed]
  shared low-level terminfo library for terminal handling

suggests terminfo might work instead. (ubuntu 16.04.14 has python 3.5
in its default repository, but not python 3.6...)


Cheers,

Patrick