[OE-core] [dylan, master][PATCH] autotools.bbclass: Fix race with sed-native

[Phil Blundell]

On Thu, 2013-10-10 at 10:00 +0100, Richard Purdie wrote:
> On Tue, 2013-10-08 at 12:47 -0500, Richard Tollerton wrote:
> > The biggest thing I can think of is gcc-native. My understanding of gcc
> > documentation is that it's recommended to build a cross-compiler with a
> > bootstrap, or at least the same version of compiler, and we're not doing
> > that. (Right?)
> 
> We don't build a gcc-native, no. Equally, we've not run in many issues
> due to that so its not been something we've thought necessary.

I think there might be some difficulty with building a Java-enabled
cross compiler if you don't have a matching host copy of ecj.jar on
hand, but we currently force Java off by default anyway and as far as I
know nobody is using it.  If we did want to start supporting Java as a
first class cross compiler target then it might be necessary to build
some host-side gcc bits.

Other than that, you're right, there is no particularly
rational/compelling reason to build a native gcc before compiling the
cross compiler.  In theory it would be a good thing for folks who are
building on systems where the installed native compiler is especially
old or lame (because your cross compiler would run faster if you built a
decent native compiler first and then used that to build the cross one)
but, in practice, it would be impossible to run OE on such a system
anyway without manually upgrading a bunch of tools and anybody who has
gone to that trouble would almost certainly have installed gcc already.

p.