cdefs: require gcc 4.2 or later

[imp]

Summary

Remove all support for gcc < 4.2.

[rpokala]

cdefs: require gcc 4.2

... or later! 😉

[imp]

In D26819#597855, @rpokala wrote:

cdefs: require gcc 4.2

... or later! 😉

Yes. Or later :)

I'll update my commit message.

[cem]

Excellent.

sys/sys/cdefs.h

322

This one is almost killable too. Outside of ce(4), we use this in one location: i386 resumectx(). And it isn't clear (to me) that we need the oddball calling convention in that location. Maybe we do.

[imp]

sys/sys/cdefs.h

322

This one is almost killable too. Outside of ce(4), we use this in one location: i386 resumectx(). And it isn't clear (to me) that we need the oddball calling convention in that location. Maybe we do.

ce(4) doesn't matter: it will define it if it isn't already defined. So we can safely ignore it. :)

I'm not sure what resumectx() does on i386,... I may investigate though...

But in any event, I was going to do an audit of all these defines to see what's still used as a followup.

[imp]

I'm going to start again here.

[imp]

https://reviews.freebsd.org/D39097 and https://reviews.freebsd.org/D39098 replace this