Re: warning: comparison is always false due to limited range of data type

[Oskar Liljeblad]

On Wednesday, June 22, 2005 at 13:47, Jim Meyering wrote:
> >
> > I get that warning without both -W and -Wall, I think.
> > (gcc 3.3.6)
> 
> I've tried with the following versions of gcc on x86_64-unknown-linux-gnu:
>   gcc-3.3 (GCC) 3.3.6 (Debian 1:3.3.6-6)
>   gcc-3.4 (GCC) 3.4.5 20050605 (prerelease) (Debian 3.4.4-0)
>   gcc-4.0 (GCC) 4.0.1 20050522 (prerelease) (Debian 4.0.0-9)
> 
> and see that warning only with -W.

Strange! Is -W somehow turned on by default?

$ gcc -DHAVE_CONFIG_H -I. -I. -I..     -g -O2 -c quotearg.c
quotearg.c: In function `quotearg_n_options':
quotearg.c:586: warning: comparison is always false due to limited range of 
data type
$ gcc -DHAVE_CONFIG_H -I. -I. -I.. -c quotearg.c
quotearg.c: In function `quotearg_n_options':
quotearg.c:586: warning: comparison is always false due to limited range of 
data type
$ ../config.guess
x86_64-unknown-linux-gnu
$ gcc --version
gcc (GCC) 3.3.6 (Debian 1:3.3.6-6)
Copyright (C) 2003 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$

Regards,

Oskar Liljeblad (address@hidden)