[Buildroot] [PATCH v2 01/14] fftw: breaks fftw-single into a dedicated package

[Joel Carlson]

On Wed, Dec 12, 2018 at 12:45 AM Gwenhael Goavec-Merou
<gwenj at trabucayre.com> wrote:
>
> From: Gwenhael Goavec-Merou <gwenhael.goavec-merou at trabucayre.com>
>
> fftw's library name depends on the precision option. Consequently,
> it's possible to install multiple flavor on the same target.
>
> This patch breaks fftw single precision into a new package and:
> - deprecates BR2_PACKAGE_FFTW_PRECISION_SINGLE, BR2_PACKAGE_FFTW_SINGLE must be
>   used instead;
> - suppress BR2_PACKAGE_FFTW_USE_SSE and BR2_PACKAGE_FFTW_USE_NEON since options
>   are only available on single precision. Corresponding options are directly
>   handled in fftw-single package;
> - do fftw depends on fftw-single when this package is enabled.
>
> Signed-off-by: Gwenhael Goavec-Merou <gwenhael.goavec-merou at trabucayre.com>

Reviewed-by: Joel Carlson <JoelsonCarl at gmail.com>
Tested-by: Joel Carlson <JoelsonCarl at gmail.com>

Testing: compile-tested all the permutations of enabling/disabling
fftw-single, fftw-double, and fftw-long-double on an aarch64 build (so
no fftw-quad available)

Thanks for your work on this patch series, Gwenhael!  I ran into this
awhile back, where I noticed I could only select one FFTW build, and I
had some issues with liquid-dsp depending on which one was selected.
I decided to just pick the one option that worked even though I would
have liked to have another available. I was too busy at the time to
spend time trying to fix it.