[Buildroot] [PATCH v1] package/qt5/qt5base: handle sse2/sse3/ssse3/sse4.1/sse4.2/avx/avx2 configuration

[Peter Seiderer <ps.report@gmx.net>]

Hello Titouan,

On Mon, 04 Feb 2019 17:34:01 +0100, Titouan Christophe <titouan.christophe@railnova.eu> wrote:

> Hi Peter,
> 
> On Fri, 2019-02-01 at 21:24 +0100, Peter Seiderer wrote:
> > The Qt configure auto detection (and anounced runtime detection
> > feature) failes (see e.g. [1]), so override the configuration
> > with the buildroot determined settings.
> > 
> > [1] http://lists.busybox.net/pipermail/buildroot/2019-January/241862.
> > html
> > 
> > Reported-by: David Picard <dplamp@gmx.com>
> > Signed-off-by: Peter Seiderer <ps.report@gmx.net>
> > ---
> > Notes:
> >  - suggested by Arnout Vandecappelle [2]
> > 
> > [2] http://lists.busybox.net/pipermail/buildroot/2019-January/242030.
> > html
> > ---
> >  package/qt5/qt5base/qt5base.mk | 31 +++++++++++++++++++++++++++++++
> >  1 file changed, 31 insertions(+)
> > 
> > diff --git a/package/qt5/qt5base/qt5base.mk
> > b/package/qt5/qt5base/qt5base.mk
> > index d10f233b46..b84efcc2bf 100644
> > --- a/package/qt5/qt5base/qt5base.mk
> > +++ b/package/qt5/qt5base/qt5base.mk
> > @@ -33,6 +33,37 @@ else
> >  QT5BASE_DEPENDENCIES += pcre2
> >  endif
> >  
> > +ifeq ($(BR2_X86_CPU_HAS_SSE2),)
> > +QT5BASE_CONFIGURE_OPTS += -no-sse2
> > +else
> > +ifeq ($(BR2_X86_CPU_HAS_SSE3),)
> > +QT5BASE_CONFIGURE_OPTS += -no-sse3
> > +else
> > +ifeq ($(BR2_X86_CPU_HAS_SSSE3),)
> > +QT5BASE_CONFIGURE_OPTS += -no-ssse3
> > +else
> > +ifeq ($(BR2_X86_CPU_HAS_SSE4),)
> > +QT5BASE_CONFIGURE_OPTS += -no-sse4.1
> > +else
> > +ifeq ($(BR2_X86_CPU_HAS_SSE42),)
> > +QT5BASE_CONFIGURE_OPTS += -no-sse4.2
> > +else
> > +ifeq ($(BR2_X86_CPU_HAS_AVX),)
> > +QT5BASE_CONFIGURE_OPTS += -no-avx
> > +else
> > +ifeq ($(BR2_X86_CPU_HAS_AVX2),)
> > +QT5BASE_CONFIGURE_OPTS += -no-avx2
> > +else
> > +# no BR2_X86_CPU_HAS_AVX512 for qt configure option
> > +# '-no-avx512' (available for latest)
> > +endif
> > +endif
> > +endif
> > +endif
> > +endif
> > +endif
> > +endif  
> 
> Does -no-sse2 implies -no-sse3, -no-ssse3, ... and so on and so forth ?
> This is not very clear from the docs I found.

Yes, see qt configure.json line 908ff ([1])...

> 
> > +
> >  QT5BASE_CONFIGURE_OPTS += $(call
> > qstrip,$(BR2_PACKAGE_QT5BASE_CUSTOM_CONF_OPTS))
> >  
> >  ifeq ($(BR2_PACKAGE_LIBDRM),y)  
> 
> 
> Otherwise looks reasonable.
> 
> Have a nice Monday !

Thanks for review...

Regards,
Peter

[1] http://code.qt.io/cgit/qt/qtbase.git/tree/configure.json#n908

> 
> Titouan