[OE-core] uninative stdc++ abi

[Richard Purdie]

On Fri, 2016-03-04 at 15:55 -0800, Andre McCurdy wrote:
> On Fri, Mar 4, 2016 at 3:23 PM, Khem Raj <raj.khem at gmail.com> wrote:
> > On Sat, Mar 5, 2016 at 6:33 AM, Richard Purdie
> > <richard.purdie at linuxfoundation.org> wrote:
> > > 
> > > +# https://wiki.debian.org/GCC5
> > > +# We may see binaries built with gcc5 run or linked into gcc4
> > > environment
> > > +# so use the older libstdc++ standard for now until we don't
> > > support gcc4
> > > +# on the host system.
> > > +BUILD_CXXFLAGS_append = " -D_GLIBCXX_USE_CXX11_ABI=0"
> > > 
> > > Is this the right way to try and fix this? Any better ideas?
> > 
> > yes thats the best option we have given the myriad of build OSes we
> > have to support.
> 
> An alternative would be to configure our uninative gcc5 libstdc++
> with:
> 
> EXTRA_OECONF_append = " --disable-libstdcxx-dual-abi
> --with-default-libstdcxx-abi=gcc4-compatible"
> 
> Not sure if that's better though. Just a different approach to
> achieve
> the same thing.

We don't actually build our own gcc-native with uninative though, we're
trying to keep it small/fast and adding our own gcc doesn't really do
that.

I'm going to test the above and some other fixes on the autobuilder,
see how it looks.

Cheers,

Richard