[LTP] [RFC PATCH 2/2] travis: Add 2x cross-compile ARM build

[Petr Vorel]

Hi!
> > > So the cross compilers are gcc-4.x and gcc-6.x? I ask since we just ask
> > > for arm cross compilers without a version in the script below.
> > Versions are 4.8.4 for both. It's actually visible in the log:

> > https://travis-ci.org/pevik-travis/ltp/jobs/315469429
> > $ arm-linux-gnueabihf-gcc --version
> > arm-linux-gnueabihf-gcc (Ubuntu/Linaro 4.8.4-2ubuntu1~14.04.1) 4.8.4
> > Copyright (C) 2013 Free Software Foundation, Inc.

> > https://travis-ci.org/pevik-travis/ltp/jobs/315469430
> > $ aarch64-linux-gnu-gcc --version
> > aarch64-linux-gnu-gcc (Ubuntu/Linaro 4.8.4-2ubuntu1~14.04.1) 4.8.4

> > > I that is true I suppose that the cross compiler versions may change
> > > without us noticing, which is not that big deal but it may be better to
> > > select specific version instead if possible.
> > The reason why it's not fixed is that it's possible only with special repository
> > ubuntu-toolchain-r-test, which is used for other jobs. AFAIK they don't provide arm
> > toolchain, that's why I used standard trusty repository for ARM.

> > So is that ok as it is?

> I guess so.

> It's a smoke test so we have to keep the number of build reasonably
> small and having arm builds is agruably more important than all possible
> gcc flavors. Moreover we still run gcc-4.9 and gcc-6 for 32bit builds
> right?
Yes, we do.


Kind regards,
Petr