Date: Thu, 18 Mar 1999 07:07:23 +1000 From: Greg Black <gjb@comkey.com.au> To: spinner.rflab@t-online.de (Steffen Hein) Cc: freebsd-questions@FreeBSD.ORG Subject: Re: gnu C compiler Message-ID: <19990317210724.9018.qmail@alpha.comkey.com.au> In-Reply-To: <36EFA9ED.5126E95C@t-online.de> of Wed, 17 Mar 1999 13:11:09 GMT References: <36EFA9ED.5126E95C@t-online.de>
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> How can you explain me that the same gnu C compiler ( release 2.7.2.1 )
> in FreeBSD apparently does not handle the long double format correctly
> while in Linux it does ?
No idea about Linux, but your program is wrong so any results
are legitimate.
> Compiling the following program 'proto.c' in FreeBSD and in Linux as
> # cc -ansi proto.c -o proto.a
Learn to use gcc's warnings (at the very least -Wall), and
you'll see where your code is incorrect.
I've snipped most of this code, but there are several other poor
C coding practices not related to the stated problem which
should also be addressed. Further help can be obtained from
good books and places like comp.lang.c, since C coding is not
really a topic for freebsd-questions.
> printf( "\n\n FLT_MIN = % le ", FLT_MIN);
^
This is wrong ----------------------^
Leave out the `l'. It's not correct for the `e' conversion.
> printf( "\n LDBL_MIN = % Le ", LDBL_MIN );
This is wrong, as gcc would have told you with -Wall: you are
passing a `double' to printf() but telling it you are passing a
`long double'. If you lie to the compiler, then it will get its
revenge.
If you cast LDBL_MIN and friends to the correct type, then your
program will run to completion.
--
Greg Black <gjb@acm.org>
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