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Re: compile with gcc option -O0 or -O

From: Ian Lance Taylor <iant at google dot com>
To: zou wonder <wonder dot zou at gmail dot com>
Cc: gcc-help at gcc dot gnu dot org
Date: Thu, 15 Sep 2011 22:40:48 -0700
Subject: Re: compile with gcc option -O0 or -O
References: <CAOXjUBxzdU2z8sEwGyczjovxigcwUkWNf28szuaQVEDKa9S=Sg@mail.gmail.com>

zou wonder <wonder.zou@gmail.com> writes:

> but one weird problem is that the following codes compiled with option -O0

You need to show us a small complete self-contained example.

Normally a program which works at -O0 and fails at -O1 has an
uninitialized variable somewhere.

Ian

Follow-Ups:
- Re: compile with gcc option -O0 or -O
  - From: David Brown

References:
- compile with gcc option -O0 or -O
  - From: zou wonder

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