Port Bug Report: Would not build with -O2 flags set

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                        POSTGRESQL BUG REPORT TEMPLATE
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Your name               : Ritch Azocar
Your email address      : admin@dqu.cc.ca.us

Category                : install: compile
Severity                : serious

Summary: Would not build with -O2 flags set

System Configuration
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  Operating System   : Linux 2.2.3 ELF RedHat 5.1

  PostgreSQL version : 6.4.2

  Compiler used      : gcc 2.7.3

Hardware:
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DEC Multia 21066A, 64M RAM

Versions of other tools:
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egcs 1.0.3
make 3.7.6

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Problem Description:
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Several targets in the backend/utils/adt directory could not be built with the optimize more (-O2) flags set.
datetime.cand dt.c I'm sure about, I don't know about any others because I removed -O2 from CFLAGS in Makefile.global
andwas able to build.  I don't relly care about optimum performance (I'm running on a 166MHz Alpha 21066A) so I didin't
spendthe time to compile individual targets with and without optimization.  I couldn't build the ODBC interface (-O2
flagnot set) at all.  I haven't tried to build it independently of the postgresql build yet.  TCL & Perl worked fine. 

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Test Case:
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Solution:
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Turn off -O2 in CFLAGS

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