Don't use epics-base with WSL 1 (Re: SoftIoc with Warning: Unable to clear IP_MULTICAST_ALL on Ubunto on WSL)

[Michael Davidsaver via Tech-talk <tech-talk at aps.anl.gov>]

On 11/24/23 00:29, Carsten Winkler via Tech-talk wrote:
> Hi Ralph!
>
>
> This means that we cannot use Docker under Windows with a SoftIOC.
To clarify.  "WSL" is slightly ambiguous.  There is the WSL 1 series,
and the 2 series.

https://en.wikipedia.org/wiki/Windows_Subsystem_for_Linux

WSL 1 is imo. practically unable to support PVA and CA.

WSL 2 can work (as Ralph shows) after the usual "guest" to host
virtual networking configuration is understood.

tldr...

Both PVA and CA protocols depend on less common features of TCP/IP
stacks which behave slightly differently on Linux vs. Windows vs. BSD.
Over the years, we have identified a set of workarounds for these
"quirks".  Of course this depend on being able to identify which TCP/IP
stack implementation is actually *running*.  A build time check is
not sufficient.

With WSL 1, I was not able to find a reliable way to identify that
this "Linux" host actually has Windows IP stack quirks.

The opposite situation exists with WINE where a "Windows" host
actually has Linux IP stack quirks.  Unlike WSL 1, this situation
can be detected at runtime.

https://github.com/mdavidsaver/pvxs/blob/0bddf561eb2bfdef673476b5398365f83f8e3ead/src/os/WIN32/osdSockExt.cpp#L25-L30