Re: compiler warnings on AIX and Solaris

[Denis Ovsienko via tcpdump-workers <tcpdump-workers () lists tcpdump org>]

> --- Begin Message ---
>
>
> From: Denis Ovsienko <denis () ovsienko info>
>
> Date: Sun, 25 Jul 2021 02:21:39 +0100
>
> [...]
>
> > So the only way to fix this is to turn off the warnings; change
> > 39f09d68ce7ebe9e229c9bf5209bfc30a8f51064 adds macros to disable and
> > re-enable -Wcast-qual and wraps the offending code in getopt_long.c
> > with those macros, so the problem should be fixed on Solaris 9.
>
> The fix works, in that GCC on both OSes now compiles getopt_long.c
> cleanly. Neither Sun C on Solaris nor XL C on AIX detected the problem
> before, so there is no change there.
>
> Thank you!
>
> [...]
>
> > If there's a way to force XL C to treat it as a hard error, we need
> > to update the AC_LBL_CHECK_UNKNOWN_WARNING_OPTION_ERROR autoconf
> > macro to set the compiler up to use it when testing whether compiler
> > options are supported.
>
> I have tried xlc -qhaltonmsg=1501-289 and -qhalt=w flags, but to no
> apparent effect. It looks like warnings that come from the command-line
> arguments parsing space are not handled the same way as warnings that
> come from the C language compilation space.
>
> -- 
>     Denis Ovsienko
>
> --- End Message ---
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