Re: Legacy Linux kernel support

[Guy Harris <gharris () sonic net>]

On Oct 8, 2019, at 2:15 PM, Michael Richardson <mcr () sandelman ca> wrote:

> I don't really know which "legacy" compiler stuff that we may wish to
> continue to tolerate in tcpdump, but which we can dispense with in libpcap.

At this point, in the master branch, I'm not sure there's a difference between how much C99 stuff is required by 
libpcap and how much C99 stuff is required by tcpdump.

I'm also not sure how much of the C99 stuff is unavailable in the sort of "enterprise stable" OSes (RHEL/CentOS and 
Solaris, for example).

Probably the biggest concern for building tcpdump on those systems is the version of libpcap on those systems, so we 
don't want to drop support for older versions of libpcap.  I suspect the master branch of tcpdump will still build on 
any "legacy" versions of those "enterprise stable" OSes that are still being used on a significant number of machines; 
it doesn't depend directly on a lot of UN*Xisms likely not to be available on those versions, given that it captures, 
and reads and writes capture files, using libpcap.
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