Re: [Lse-tech] [BUG] NULL pointer dereference

[James W. <wa...@us...>]

Wow... glad to see that.

 - jim

Keith Owens <ka...@oc...>@lists.sourceforge.net on 10/10/2002 07:16:53
AM

Sent by:    lse...@li...


To:    James Washer/Beaverton/IBM@IBMUS
cc:    lse-tech <lse...@li...>
Subject:    Re: [Lse-tech] [BUG] NULL pointer dereference



On Thu, 10 Oct 2002 07:02:35 -0700,
"James Washer" <wa...@us...> wrote:
>I'm glad to hear that is the case with GCC, but be warned, with other
>compilers '-g' can and does change the binary. Why? Lots   of reasons,
>consider register re-use.

True, but fortunately gcc avoids that problem.  info gcc

 Unlike most other C compilers, GCC allows you to use `-g' with `-O'.
 The shortcuts taken by optimized code may occasionally produce
 surprising results: some variables you declared may not exist at all;
 flow of control may briefly move where you did not expect it; some
 statements may not be executed because they compute constant results
 or their values were already at hand; some statements may execute in
 different places because they were moved out of loops.

IMHO this is the correct way to do it, it ensures that compiling with
-g does not change the generated code.  There are few things more
annoying than bugs that go away when you turn on debugging ...



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