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<title>buildroot/package/fftw/fftw-double, branch 2019.02-op-build</title>
<subtitle>OpenPOWER buildroot sources</subtitle>
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<updated>2019-02-06T09:14:46+00:00</updated>
<entry>
<title>package/fftw: break fftw-double into a dedicated package</title>
<updated>2019-02-06T09:14:46+00:00</updated>
<author>
<name>Gwenhael Goavec-Merou</name>
<email>gwenhael.goavec-merou@trabucayre.com</email>
</author>
<published>2019-01-21T13:50:59+00:00</published>
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<content type='text'>
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 double precision into a new package and:

- makes BR2_PACKAGE_FFTW_PRECISION_DOUBLE select BR2_PACKAGE_FFTW_DOUBLE
  to keep compatibility with packages that use
  BR2_PACKAGE_FFTW_PRECISION_DOUBLE. This option will be removed in a
  follow-up commit;
- removes BR2_PACKAGE_FFTW_USE_SSE2 since it is only used for single
  and double precision. The corresponding options are directly handled in
  fftw-double package;
- makes fftw depend on fftw-double when this package is enabled;
- turns fftw itself into a generic-package instead of an
  autotools-package: it no longer builds anything and only allows to
  trigger the build of the appropriate fftw-* sub-packages, as a
  temporary compatibility mechanism.

Signed-off-by: Gwenhael Goavec-Merou &lt;gwenhael.goavec-merou@trabucayre.com&gt;
[Yann/Thomas:
 - Use FFTW_DOUBLE_DL_SUBDIR to avoid downloading fftw multiple times
 - Minor reformatting tweaks in fftw-double.mk
 - Drop from fftw.mk FFTW_CONF_ENV/FFTW_CONF_OPTS which are no
   longer used
 - Make fftw a generic package so that its dependencies are built
 - Do not deprecate BR2_PACKAGE_FFTW_PRECISION_DOUBLE and instead
   make it select BR2_PACKAGE_FFTW_DOUBLE, so that packages using
   BR2_PACKAGE_FFTW_PRECISION_QUAD continue to work.]
Signed-off-by: Thomas Petazzoni &lt;thomas.petazzoni@bootlin.com&gt;
Tested-by: "Yann E. MORIN" &lt;yann.morin.1998@free.fr&gt;
Reviewed-by: "Yann E. MORIN" &lt;yann.morin.1998@free.fr&gt;
Signed-off-by: Thomas Petazzoni &lt;thomas.petazzoni@bootlin.com&gt;
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