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References: <50152C66 DOT 9040202 AT iki DOT fi>
	<201207291745 DOT 54447 DOT juan DOT guerrero AT gmx DOT de>
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	<201208010039 DOT 53912 DOT juan DOT guerrero AT gmx DOT de>
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Date: Tue, 31 Jul 2012 19:34:27 -0500
Message-ID: <CAA-ihx_XQNDBArTgtztjXm6am8sXatPdKU-T_RWAeMobjxADtg@mail.gmail.com>
Subject: Re: gcc-4.8 snapshots and DJGPP
From: Rugxulo <rugxulo AT gmail DOT com>
To: djgpp-workers AT delorie DOT com
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Sending again ....


---------- Forwarded message ----------
From: Rugxulo <rugxulo_AT_gmail.com>
Date: Tue, Jul 31, 2012 at 7:32 PM
Subject: Re: gcc-4.8 snapshots and DJGPP
To: djgpp-workers AT delorie DOT com


Hi,

On Tue, Jul 31, 2012 at 5:39 PM, Juan Manuel Guerrero
<juan.guerrero_AT_gmx.de> wrote:
>
> OFYI, I have successfully compiled gcc480_20120722 using djdev203 and djdev204.
> Building the djdev203 takes 4:30 hours, the djdev204 build takes 6:00 hours.

[EDIT] Dang ["Frankly my dear ..."], that's a long time! Major coffee
break.   ;-)

> Neitherless something seems to be brocken.  I cannot produce programs that
> can be debuged.  If I compile a hello-world program which main function is
> not void I always get the error output below:
>
> Breakpoint 1, main (
>     argc=<error reading variable: can't compute CFA for this frame>,
>     argv=<error reading variable: can't compute CFA for this frame>) at 1.c:5
> 5         for (i = 0; i < 10; i++)
> (gdb)

Where does DJGPP do argc handling, in crt0.o module?

> I compiled with -g[0-3] -O0.  The only reference I found related to this error
> message was this:
>   RFC: DW_OP_call_frame_cfa, again by Tom Tromey
>   <http://old.nabble.com/RFC%3A-DW_OP_call_frame_cfa%2C-again-td24925508.html#a25259165>
>
> but I do not understand this stuff.

Sounds like a Dwarf issue. The default for GCC is probably Dwarf-2
with GCC extensions, so perhaps using something else (strict Dwarf?
Stabs?) might work. Try that and see.