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From: "Eric G. Miller" <egm2@jps-nospam.net>
Subject: Re: Last stream problem: byte order
Newsgroups: comp.lang.ada
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References: <mailman.1017085322.10332.comp.lang.ada@ada.eu.org>
 <3CA04CA6.338B37D7@ib-paus.com>
 <mailman.1017243242.6790.comp.lang.ada@ada.eu.org>
 <3CA20BAA.FD53C08A@ib-paus.com>
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Date: Fri, 29 Mar 2002 02:08:32 GMT
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In <x7v663gczbb.fsf@smaug.pushface.org>, Simon Wright wrote:

> "Eric G. Miller" <egm2@jps-nospam.net> writes:
> 
>> In <3CA20BAA.FD53C08A@ib-paus.com>, Dr. Michael Paus wrote:
> 
>> >       if System.Default_Bit_Order = System.Low_Order_First then
>> >          ... (swap the bytes)
>> >       else
>> >          ... (don't swap the bytes)
>> >       end if;
>> > 
>> > But I don't think this makes a big difference in either case.
>> 
>> GNAT gives a warning that the condition is always true (or false).
>> Don't know if it eliminates the unreachable branch (I would think so
>> with -02).  Resorting to preprocessing trickery would probably
>> insure it is always a compile time check.  Don't know if there's
>> another way...
> 
> I've just tried a similar code with 3.13p, 3,14a1 and 3.15a and none
> of them flagged a warning here .. with or without -O2.

gnatmake -g -gnatwa <foo>

Guess I forget to mention "if you turn on warnings...".