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| author | Yann E. MORIN <yann.morin.1998@free.fr> | 2015-03-16 17:31:21 +0100 |
|---|---|---|
| committer | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2015-03-16 19:44:02 +0100 |
| commit | 96336c624855e08b6c0ec9200e9784c2b9be1afb (patch) | |
| tree | 53957192ef6c84b5adb104a779393acd520a6acc | |
| parent | a990ed296de3c021891373fa14f8789f4d7fa422 (diff) | |
| download | buildroot-96336c624855e08b6c0ec9200e9784c2b9be1afb.tar.gz buildroot-96336c624855e08b6c0ec9200e9784c2b9be1afb.zip | |
package/fftw: add option for fast maths
Use FFTW_CFLAGS as intermediate variable, since we're going to need it
in a later patch (about NEON optimisations).
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
[based on a patch by Guillaume]
Cc: guillaume william brs <guillaume.bressaix@gmail.com>
Cc: Gwenhael Goavec-Merou <gwenhael.goavec-merou@trabucayre.com>
Tested-by: Gwenhael Goavec-Merou <gwenhael.goavec-merou@trabucayre.com>
Reviewed-by: Gwenhael Goavec-Merou <gwenhael.goavec-merou@trabucayre.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
| -rw-r--r-- | package/fftw/Config.in | 13 | ||||
| -rw-r--r-- | package/fftw/fftw.mk | 7 |
2 files changed, 20 insertions, 0 deletions
diff --git a/package/fftw/Config.in b/package/fftw/Config.in index 4cefa28edf..4a0706a6be 100644 --- a/package/fftw/Config.in +++ b/package/fftw/Config.in @@ -49,4 +49,17 @@ config BR2_PACKAGE_FFTW_PRECISION_QUAD endchoice +config BR2_PACKAGE_FFTW_FAST + bool "optimise for speed over accuracy" + help + Optimise for fast math functions, at the expense of accuracy. + + Say 'y' if you need speed and can live with inaccuracies in + the results. Say 'n' (the default) if accuracy is of utmost + importance. + + This basically uses gcc's -Ofast optimisation level, which in + turn is basically using gcc's -ffast-math. See the gcc manual + for what this means. + endif diff --git a/package/fftw/fftw.mk b/package/fftw/fftw.mk index 78d36e97d7..c05012a8e4 100644 --- a/package/fftw/fftw.mk +++ b/package/fftw/fftw.mk @@ -14,4 +14,11 @@ FFTW_CONF_OPTS += $(if $(BR2_PACKAGE_FFTW_PRECISION_SINGLE),--enable,--disable)- FFTW_CONF_OPTS += $(if $(BR2_PACKAGE_FFTW_PRECISION_LONG_DOUBLE),--enable,--disable)-long-double FFTW_CONF_OPTS += $(if $(BR2_PACKAGE_FFTW_PRECISION_QUAD),--enable,--disable)-quad-precision +FFTW_CFLAGS = $(TARGET_CFLAGS) +ifeq ($(BR2_PACKAGE_FFTW_FAST),y) +FFTW_CFLAGS += -Ofast +endif + +FFTW_CONF_OPTS += CFLAGS="$(FFTW_CFLAGS)" + $(eval $(autotools-package)) |
