[tcpdump] About HAVE_NO_PRINTF_Z

[Francois-Xavier Le Bail via tcpdump-workers <tcpdump-workers () lists tcpdump org>]

> --- Begin Message ---
>
>
> From: Francois-Xavier Le Bail <devel.fx.lebail () orange fr>
>
> Date: Thu, 12 Jan 2023 07:44:07 +0100
>
> Hello,
>
> The commit fbd44158e0d5e6bb0c9b05671f702ebcf68cc56d was:
> -------------------------------------------------------------------------------
>     Mend "make check" on Solaris 9 (Autoconf only).
>     
>     Sun C 5.9 does not support C99. GCC 4.6.4 recognizes -std=gnu99, but
>     does not support the z length modifier in printf(3). In either case 18
>     tests fail in the following manner:
>     
>     <     [...]: domain [length 0 < 12] (invalid)
>     ---
>     >     [...]: domain [length 0 < zu] (invalid)
>     
>     Make these tests conditional and disable them when HAVE_NO_PRINTF_Z is
>     defined. Modify the Autoconf leg of the build process to define the
>     macro when printf() does not handle %zu as expected. The CMake leg looks
>     broken on Solaris 9 with 2.8.9 now, so leave it be for now.
> -------------------------------------------------------------------------------
>
> I think that if a compiler builds a tcpdump that outputs "zu" when it must output "12", it's an error and this compiler 
> must be tag "unsupported".
> Thus I propose to revert this commit and the cherry-picked one in 4.99 branch.
> (We have been requesting support from C99 since 2018.)
>
> -- 
> Francois-Xavier
>
> --- End Message ---
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