[Buildroot] [PATCH v3 07/17] package/aubio: use the new fftw-double and fftw-single packages

[Gwenhael Goavec-Merou]

Hello,

On Tue, 1 Jan 2019 13:02:42 +0100
"Yann E. MORIN" <yann.morin.1998 at free.fr> wrote:

> Thomas, Gwenhaël, All,
> 
> Gwenhaël, question for you below...
> 
> On 2018-12-31 14:30 +0100, Thomas Petazzoni spake thusly:
> > From: Gwenhael Goavec-Merou <gwenhael.goavec-merou at trabucayre.com>
> > 
> > Signed-off-by: Gwenhael Goavec-Merou <gwenhael.goavec-merou at trabucayre.com>
> > [Thomas: drop the condition on BR2_PACKAGE_FFTW]
> > Signed-off-by: Thomas Petazzoni <thomas.petazzoni at bootlin.com>
> > ---
> >  package/aubio/aubio.mk | 13 ++++++-------
> >  1 file changed, 6 insertions(+), 7 deletions(-)
> > 
> > diff --git a/package/aubio/aubio.mk b/package/aubio/aubio.mk
> > index b0cc8b899e..dd2db2adb9 100644
> > --- a/package/aubio/aubio.mk
> > +++ b/package/aubio/aubio.mk
> > @@ -27,7 +27,7 @@ AUBIO_CONF_OPTS += --disable-sndfile
> >  endif
> >  
> >  # Could not compile aubio in double precision mode with libsamplerate
> > -ifeq ($(BR2_PACKAGE_LIBSAMPLERATE)$(BR2_PACKAGE_FFTW_PRECISION_SINGLE),yy)
> > +ifeq ($(BR2_PACKAGE_LIBSAMPLERATE)$(BR2_PACKAGE_FFTW_SINGLE),yy)  
> 
> Now, we can be in a situation where both single and double are enabled,
> so the condi9tion here would be satisfied, i.e. we'd build with
> libsamplerate, but...
> 
> >  AUBIO_DEPENDENCIES += libsamplerate
> >  AUBIO_CONF_OPTS += --enable-samplerate
> >  else
> > @@ -41,15 +41,14 @@ else
> >  AUBIO_CONF_OPTS += --disable-jack
> >  endif
> >  
> > -ifeq ($(BR2_PACKAGE_FFTW),y)
> > -AUBIO_DEPENDENCIES += fftw
> >  # fftw3 require double otherwise it will look for fftw3f
> > -ifeq ($(BR2_PACKAGE_FFTW_PRECISION_DOUBLE),y)
> > +ifeq ($(BR2_PACKAGE_FFTW_DOUBLE),y)  
> 
> ... here we'd be using the double variant, as it takes precedence over
> the single one.
> 
> Thus we'd end up in the situation that the comment warns about: building
> libsamplerate in double precision is not possible.
> 
> So, I'd suggest that we move the libsamplerate condition below, in the
> fftw-single condition...
> 
> >  AUBIO_CONF_OPTS += --enable-fftw3 --enable-double
> > -else ifeq ($(BR2_PACKAGE_FFTW_PRECISION_SINGLE),y)
> > +AUBIO_DEPENDENCIES += fftw-double
> > +else ifeq ($(BR2_PACKAGE_FFTW_SINGLE),y)
> >  AUBIO_CONF_OPTS += --enable-fftw3f --disable-double
> > -endif
> > -else  # !BR2_PACKAGE_FFTW
> > +AUBIO_DEPENDENCIES += fftw-single  
> 
> ... here.
> 
> Of course, if the comment is now wrong and the libsamplerate can be
> build with fftw-double, the fix is different, and the condition on
> fftw-single should be dropped for libsamplerate.
> 
> Gwenhaël, care to share your thoughts on this? ;-)

True, double can't be enabled if libsamplerate is set.
It's seem mandatory to add a test about libsamplerate to avoid double if
present (or add an option to let the user decide if libsamplerate support must
be use or not).

Gwen

> 
> Regards,
> Yann E. MORIN.
> 
> > +else
> >  AUBIO_CONF_OPTS += --disable-fftw3
> >  endif
> >  
> > -- 
> > 2.20.1
> >   
> 
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