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Date: Thu, 27 May 2004 17:11:34 -0500
From: Brian Ford <ford AT vss DOT fsi DOT com>
Reply-To: cygwin AT cygwin DOT com
To: "Gerrit @ cygwin" <cygwin AT cygwin DOT com>
cc: mathias DOT wagner AT philips DOT com
Subject: Re: GCC 3.3.1 problem with printf %Lg %Lg and -m128bit-long-double compile option
In-Reply-To: <277403406.20040527205859@familiehaase.de>
Message-ID: <Pine.CYG.4.58.0405271657480.1584@fordpc.vss.fsi.com>
References: <OFFB435626 DOT E532FF68-ONC1256EA0 DOT 003FCC45-C1256EA0 DOT 00405F9A AT philips DOT com> <277403406 DOT 20040527205859 AT familiehaase DOT de>
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On Thu, 27 May 2004, Gerrit P. Haase wrote:

> Hallo mathias,
>
> > GCC 3.3.1 has a problem when printing multiple long double variables using
> > printf and the -m128bit-long-double compile option on a Pentium-based
> > machine.
>
> Seems to be a bug in gcc, for bug reporting instructions, please see:
> http://gcc.gnu.org/bugs.html.

No disrespect intended Mr. GCC maintainer, but I'm pretty sure that is
expected behavior.  See "info gcc" in the -m128bit-long-double section:

     *Warning:* if you override the default value for your target ABI,
     the structures and arrays containing `long double' will change
     their size as well as function calling convention for function
     taking `long double' will be modified.  Hence they will not be
     binary compatible with arrays or structures in code compiled
     without that switch.

Cygwin/newlib would need to be recompiled with this switch for proper
printf operation.  Why are you trying to use this switch, Mathias?

-- 
Brian Ford
Senior Realtime Software Engineer
VITAL - Visual Simulation Systems
FlightSafety International
the best safety device in any aircraft is a well-trained pilot...

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