[openssl-dev] [openssl.org #4144] patch: Use '__sun' instead of 'sun' for strict ISO conforming, compiler/options

[Andy Polyakov via RT]

> ... Either way, we seem to
> agree that *replacing* sun with __sun is not right thing to do in SunOS
> 4 context. One can argue for sun || __sun, or one can argue in favour of
> reverting. My vote goes for latter, because original conditions [in
> e_os.h] do work adequately.

After closer look I have to withdraw my preference for just reverting.
Because there is one case that is not appropriate for *Solaris*.
Initially I noted that Solaris sys/ioctl.h includes sys/filio.h, but I
failed to notice and latter's inclusion is conditional and condition is
not met when OpenSSL compiles with defaults flags. As compiler targeting
Solaris doesn't *have to* define 'sun' for system headers to work, one
has to reserve for possibility that it's absent.