BIND 10 #2048: configure check for pyexpat

[BIND 10 Development]

#2048: configure check for pyexpat
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                   Reporter:  jreed  |                 Owner:  UnAssigned
                       Type:  task   |                Status:  new
                   Priority:  low    |             Milestone:  New Tasks
                  Component:  build  |            Resolution:
  system                             |             Sensitive:  0
                   Keywords:         |           Sub-Project:  Core
            Defect Severity:  N/A    |  Estimated Difficulty:  2
Feature Depending on Ticket:         |           Total Hours:  0
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
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Comment (by naokikambe):

 I think we can't. There isn't SimpleXMLTreeBuilder in the python standard
 library. For using it, we should additionally install elementtree:
 http://effbot.org/downloads/#elementtree. But it seems to use xmllib,
 xmllib seems to removed from python3:
 http://www.python.org/getit/releases/3.0.1/NEWS.txt.

 Anyway that pyexpat would be used only in the stats-httpd unittest, not in
 runtime. Nevertheless I think checking for pyexpat in configure.ac would
 be better.

 Thanks,

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Ticket URL: <http://bind10.isc.org/ticket/2048#comment:5>
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