Error: org.macports.build for port pdflib returned: command execution failed

[Avijit Shee]

Hi,
I was trying to upgrade my mac( version: Mountain Lion-10.8.4) by the
following command line:
sudo port upgrade outdated
It shows the following problem:
Error: org.macports.build for port pdflib returned: command execution
failed.

Due to this pdflib not being installed some other programs like gnuplot and
etc. are not running.
Please suggest a solution.
Regards,
avijit
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