Message-ID: <32BE556A.6685@post.comstar.ru>
Date: Mon, 23 Dec 1996 12:48:26 +0300
From: Dim Zegebart <zager AT post DOT comstar DOT ru>
Reply-To: zager AT post DOT comstar DOT ru
Organization: Comstar Ltd.
MIME-Version: 1.0
To: "Salvador Eduardo Tropea (SET)" <salvador AT natacha DOT inti DOT edu DOT ar>
CC: DJGPP Mail List <djgpp AT delorie DOT com>
Subject: Re: Debugging in RHIDE
References: <m0vb50S-000S1fC AT natacha DOT inti DOT edu DOT ar>
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit

Salvador Eduardo Tropea (SET) wrote:
> 
> Hi Dim:
> >
> > I discover the odd problem with DEBUGGING in RHIDE
> > (unfortunately i'm too stupid to use GDB :-(   )
> I guess that you are lazy not stupid ;-).
Yes, thats right :-)

>If you use -Ox you'll loose some debug
> features. For example:
> 
>   if (a>10)
>     { int b; for (b=1; b<10; b++) a++; }
> 
>   b will be optimized in the 90% of the cases and you'll not be able
> to watch the b contents because is in a CPU register.
> 
>  Or:
>  switch (a)
>    {
>     case 1: a+=2; break;
>     case 2: b+=2; a+=2; break;
>    }
> 
>   If you step in the case 2 you'll see that the debugger will go to
> the case 1!, that very logic because the compiler will reuse the a+=2
> code, or you want 2 copies of the same code?
> That's normal, and logic.
Ok, loosing of some debugging information is not supprasing for me 
(i have some knowlege about optimization and related things (i hope so))

> > Info page say:
> > "Unlike most other C compilers, GNU CC allows you to use `-g' with
> > `-O'.

Info page say just that it say. So, i offer add some words into info
page
about problems shown above :
: "Info page say:
: Unlike most other C compilers, GNU CC allows you to use `-g' with
: `-O' (with some restrictions). Restrictions are : ....

Thaks for all.

-- 
Regards,
Dim Zegebart,
Moscow Russia.