Port Bug Report: fails to compile pgenv.cc

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                        POSTGRESQL BUG REPORT TEMPLATE
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Your name        : William Wilson
Your email address    : bwilso23@csc.com

Category        : install: compile
Severity        : serious

Summary: fails to compile pgenv.cc

System Configuration
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  Operating System   : IRIX 6.5

  PostgreSQL version : 6.4.2

  Compiler used      : Mipspro cc

Hardware:
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Versions of other tools:
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gmake

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Problem Description:
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When trying to compile using "gmake all" the script goes through all
directories prior to the "interfaces" directory fine, then hangs
in the interfaces/libpq++ directory.

It begins complaining about the identifier "string" not being
defined in pgenv.h, beginning on line 48.  This continues all the
way through pgenv.cc.  I have looked in every include file
I know to find any definition of "string" to no avail.  (Using grep)

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Test Case:
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It repeats every time I try to compile.  Had the same error with the
previous version (6.4) and didn't have time to figure it out.  Now that
I have tried, I've wasted a day.

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Solution:
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