Re: AC_LBL_FIXINCLUDES does not make it into configure

[Guy Harris via tcpdump-workers <tcpdump-workers () lists tcpdump org>]

> --- Begin Message ---
>
>
> From: Guy Harris <gharris () sonic net>
>
> Date: Fri, 27 Jan 2023 01:40:48 -0800
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> On Jan 22, 2023, at 9:59 AM, Denis Ovsienko via tcpdump-workers <tcpdump-workers () lists tcpdump org> wrote:
>
> > I have also removed AC_LBL_C_INLINE and a conditional substitute for
> > Tru64 pfopen() from tcpslice.  Interestingly, tcpslice and tcpdump,
> > which don't call pfopen(), used to have this substitute, and libpcap,
> > which does call pfopen(), does not have it.
>
> That dates back to tcpdump 3.4.  I don't know why they decided to compile pfopen() into tcpdump and tcpdslice if it's 
> not in a system library, rather than compiling it into libpcap if it's not in a system library.  Perhaps they wanted to 
> be able to build versions of libpcap that would work both on Tru64 UNIX versions in which pfopen() is in a system 
> library and versions in which it's not and all you have is pfopen.c source code under /usr/examples.
>
> I don't know what older versions those might be, and I suspect we have little if any reason to continue to make it 
> possible to build tcpdump or tcpslice on those older versions - it looks as if Tru64 UNIX 4.x and 5.x have pfopen() in 
> system libraries; according to
>
>         https://en.wikipedia.org/wiki/Tru64_UNIX
>
> 4.0A through 4.0F all date back to the previous millennium.
>
> > In tcpdump it is a bit more entrenched, so I did not touch it yet.
>
> It looks as if you removed the pfopen() stuff from tcpdump's configure script in 
> 43670fb635503e69cdbf8055134a0befb94d2e15.
>
> The AC_LBL_C_INLINE stuff is still there, but doesn't look *that* entrenched; are there any compilers that we need to 
> support and that *don't* support C99 inline?  If not, we could just remove the call from configure.ac and the 
> definition from aclocal.m4.
>
> --- End Message ---
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