Re: libtelnet: Make encryption decls compatible with C23.

[Collin Funk]

On 5/10/24 6:52 AM, Simon Josefsson wrote:>> $ ./configure CC="gcc-14.1" 
CFLAGS="-std=c23 -Wstrict-prototypes" --enable-authentication 
--enable-encryption --with-krb5
> 
> Ah, you answered my request from the earlier email already :-)

:)

> Looks good, and yes let's improve the compiler warning usage to catch
> this.  I added a new idiom in last libidn2 that make sense to backport,
> then --enable-gcc-warnings=error should result in build failures (we
> should make sure it enabled -Wstrict-prototypes).  A C23 build would be
> nice too, we alreayd build using latest gcc but not in C23 mode --
> adding that would be simple.

I think that one should get enabled by Gnulib, but I am not very
skilled at m4/autoconf. So I may be wrong...

I'll fix the telnet ones in a bit.

There are still some old K&R declarations and declarations missing
prototypes for Kerberos 4 stuff. I'm leaving them unchanged since I
have no way of testing them.

Collin