[dpdk-dev] [PATCH v2 1/3] build: add aarch64 clang to meson cross-compile

[Jerin Jacob]

On Mon, Oct 5, 2020 at 4:27 PM Juraj Linkeš <juraj.linkes at pantheon.tech> wrote:
>
>
>
> > -----Original Message-----
> > From: Jerin Jacob <jerinjacobk at gmail.com>
> > Sent: Sunday, October 4, 2020 10:30 AM
> > To: Juraj Linkeš <juraj.linkes at pantheon.tech>
> > Cc: Thomas Monjalon <thomas at monjalon.net>; David Marchand
> > <david.marchand at redhat.com>; Aaron Conole <aconole at redhat.com>;
> > Michael Santana <maicolgabriel at hotmail.com>; dpdk-dev <dev at dpdk.org>
> > Subject: Re: [dpdk-dev] [PATCH v2 1/3] build: add aarch64 clang to meson cross-
> > compile
> >
> > On Thu, Oct 1, 2020 at 4:07 PM Juraj Linkeš <juraj.linkes at pantheon.tech>
> > wrote:
> > >
> > > Create meson cross file arm64_armv8_linux_clang_ubuntu1804.
> > > Use clang/LLVM toolchain with sysroot pointing to gcc cross stdlib.
> > >
> > > Signed-off-by: Juraj Linkeš <juraj.linkes at pantheon.tech>
> > > ---
> > >  config/arm/arm64_armv8_linux_clang_ubuntu1804 | 20
> > > +++++++++++++++++++
> >
> > IMO, if we are adding a specific OS distribution-specific configuration then it
> > won't scale.
> > Why not have just arm64_armv8_linux_clang ?
>
> CFLAGS, LDFLAGS, c_args and c_link_args don't work when cross-compiling (at least they didn't work when I tested it) and that means we have to put the paths to stdlib (which llvm/clang doesn't implement) into a cross file

I am using cross-build, following syntax is working
CFLAGS='-g -ggdb3' meson build

> The arm64_armv8_linux_clang_ubuntu1804 contains paths that work with ubuntu clang/gcc packages (and would thus be used in CI). We can't have a generic cross file for clang because of this path limitation.

If ubuntu 18.04 needs some fix up like adding the stuff to PATH etc,
we could do a different stage in Travis ci. right?