[MacPorts] #23894: sudo port install zlib fails on Snow Leopard

[MacPorts]

#23894: sudo port install zlib fails on Snow Leopard
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 Reporter:  glmuelle@…                |       Owner:  ryandesign@…           
     Type:  defect                    |      Status:  new                    
 Priority:  Normal                    |   Milestone:                         
Component:  ports                     |     Version:  1.8.2                  
 Keywords:                            |        Port:  zlib                   
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Comment(by raimue@…):

 Replying to [comment:4 ryandesign@…]:
 > Replying to [comment:3 jmr@…]:
 > > Looks like your system clock is just set wrong.
 > Interesting. What makes you suppose this?

 The message "Portfile changed since last build; discarding previous
 state." appears if the Portfile's modification time is newer than the
 state file. As this appears at every phase I guess the current system time
 is prior to the Portfile modification time, therefore always causing this
 message.

 Correcting your system clock and `sudo port selfupdate` should help in
 this case, as that would reset the modification time on Portfiles.

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Ticket URL: <http://trac.macports.org/ticket/23894#comment:5>
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