Re: [Buildroot] [PATCH] package/rpi-userland: support ARM64 build

["Yann E. MORIN" <yann.morin.1998@free.fr>]

Nuno, All,

On 2022-08-20 18:35 +0100, Nuno Gonçalves spake thusly:
> Signed-off-by: Nuno Gonçalves <nunojpg@gmail.com>

Thanks for submitting this patch.

This has been proposed quite a few times already:

    http://lists.busybox.net/pipermail/buildroot/2020-August/289559.html
    http://lists.busybox.net/pipermail/buildroot/2020-January/271577.html
    https://lore.kernel.org/buildroot/20201017082525.GF3466@scaer/

And there were at the time quite a lot of concerns about it, and a
conclusion that arm64 was in fact not trule supported.

In short, on arm64, the set of libraries was not the same as that on
arm32, and so rpi-userland could not be, in arm64, a provider for
OpneGLES, OpenGL-EGL, or OpenMAX.

And I'll quote my previous reply:

Has that situation improved now?

If the situation is better now, then please address that in the commit
log. If not, please see the the aforementioned threads for suggested
improvements (like making the EGL/GLES/OPENMAX provider conditional).

Please note that there is one big question, about libfdt, in one of
those threads, which must be addressed too (although it does not seem to
be AArch64-related?).

For now, I've marked this patch as changes requested.

Regards,
Yann E. MORIN.

> ---
>  package/rpi-userland/Config.in       | 2 +-
>  package/rpi-userland/rpi-userland.mk | 4 ++++
>  2 files changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/package/rpi-userland/Config.in b/package/rpi-userland/Config.in
> index 342faf26e3..809ec6a6a2 100644
> --- a/package/rpi-userland/Config.in
> +++ b/package/rpi-userland/Config.in
> @@ -1,6 +1,6 @@
>  config BR2_PACKAGE_RPI_USERLAND
>   bool "rpi-userland"
> - depends on BR2_arm
> + depends on BR2_arm || BR2_aarch64
>   depends on BR2_INSTALL_LIBSTDCPP
>   depends on BR2_TOOLCHAIN_HAS_THREADS
>   depends on !BR2_STATIC_LIBS
> diff --git a/package/rpi-userland/rpi-userland.mk
> b/package/rpi-userland/rpi-userland.mk
> index 1204196e19..4ea51fa7f5 100644
> --- a/package/rpi-userland/rpi-userland.mk
> +++ b/package/rpi-userland/rpi-userland.mk
> @@ -17,6 +17,10 @@ ifeq ($(BR2_PACKAGE_LIBEXECINFO),y)
>  RPI_USERLAND_DEPENDENCIES += libexecinfo
>  endif
> 
> +ifeq ($(BR2_aarch64),y)
> +RPI_USERLAND_CONF_OPTS += -DARM64=1
> +endif
> +
>  ifeq ($(BR2_PACKAGE_RPI_USERLAND_HELLO),y)
> 
>  RPI_USERLAND_CONF_OPTS += -DALL_APPS=ON
> --
> 2.37.2
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