Re: [gccsdk] GCC8+ what new environment check is needed for packages

On 04/03/2021 08:18, alan buckley wrote:
> Chris Gransden <mailto:chrisg@care4free.net> wrote on**03 March 2021 22:49
>
> > In article <88c19afa-7904-b93e-190c-2bcebaa3feb6@sky.com>,
> >�� Lee Noar <lee.noar@sky.com> wrote:
> > > If I'm understanding you correctly, then GCC8 and later should work on
> > > anything with VFP, so a VFP check should be OK, however, the libraries
> > > are not compatible with GCC4. The libraries for GCC8/10 are stored in
> > > !SharedLibs.lib.armeabi, so armeabi would be the name of environment?
>
> The environment is for the hardware it runs on, not the software itself.
> So if the vfp check is ok (but see below) that would be sufficient.
>
> Are the GCC8/10 linked to different numbered version of the shared C
> libraries?

Only the C++ library has a different version number, so we'll probably
have to tack on "armeabihf" to the package names to distinguish them.

> If this is the case, then we just need packages with different names for
> each.
>
> If it is just the case they need armeabi versions of the existing
> versions, I�d probably create a package with the correct versions in
and make anything
> that needs them depend on that package. If we need the stuff from the current
> shared libraries then these new shared library packages can depend on
> those.

Yes, the GCC10 !SharedLibs is designed to be copied over the GCC4
!SharedLibs, the result can then be used to run GCC4 and GCC10 code.
It should also depend an ARMEABISupport.

> > > For dynamic linking, it would require the runtime shared libraries to
> > > be packaged. Such a package is produced with the GCC10 build for
> > > copying over the package produced by the GCC4 build, although
> should the
> > > C++ libraries be in a separate package?
>
> Yes, I think it should really though it�s not critical. It sounds like
> the GCC10 package is already there.

Yes, I just need to split off the C++ library into a separate package.

>
> > I just tried a simple Hello World program built by gcc 10.2 and it
> gave an
> > abort when run on a RPi 1B. Pi 1 is armv6 and vfp2.
> > If I do gcc -v it shows armv7 and vfpv3 as defaults.
>
> Chris mentioned this to me, which is one of the reasons I asked the question
> about the environment.

Yes, sorry, Chris is right, I remember now discussing this with Andrew
Rawnsley when trying to determine which platforms Iris should
work on. So, yes, you would have to check for vfpv3.

Lee.

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