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GCC warnings question

From: Jonathan Wilson <jonwil at tpgi dot com dot au>
To: gcc <gcc at gcc dot gnu dot org>
Date: Tue, 13 Apr 2004 16:22:51 +0800
Subject: GCC warnings question

Is there a way to turn off these 2 warnings:
warning: dereferencing type-punned pointer will break strict-aliasing rules
warning: `xxx' defined but not used
without turning anything else off?

And also, what does the first warning mean?

Follow-Ups:
- Re: GCC warnings question
  - From: llewelly
- Re: GCC warnings question
  - From: Nathan Sidwell

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