[Buildroot] [PATCH v2 1/1] fftw: add compile precision option

[Gwenhael Goavec-Merou]

From: Gwenhael Goavec-Merou <gwenhael.goavec-merou at trabucayre.com>

fftw has options to select compile precision between single, long-double and
quad. These options are exclusives. This patch adds choice to select precision
option.

Signed-off-by: Gwenhael Goavec-Merou <gwenhael.goavec-merou at trabucayre.com>
---
Changes v1 -> v2:
 * FFTW_CONFIGURE_OPTS -> FFTW_CONF_OPTS
---
 package/fftw/Config.in | 32 ++++++++++++++++++++++++++++++++
 package/fftw/fftw.mk   | 10 ++++++++++
 2 files changed, 42 insertions(+)

diff --git a/package/fftw/Config.in b/package/fftw/Config.in
index 36f849f..f35179b 100644
--- a/package/fftw/Config.in
+++ b/package/fftw/Config.in
@@ -9,3 +9,35 @@ config BR2_PACKAGE_FFTW
 	  double precision.
 
 	  http://www.fftw.org
+
+if BR2_PACKAGE_FFTW
+
+choice
+	prompt "fftw precision"
+	default BR2_PACKAGE_FFTW_PRECISION_NONE
+	help
+	  Selects fftw precision
+
+config BR2_PACKAGE_FFTW_PRECISION_NONE
+	bool "none"
+	help
+	  no compile precision selected
+
+config BR2_PACKAGE_FFTW_PRECISION_SINGLE
+	bool "single precision"
+	help
+	  compile fftw in single precision
+
+config BR2_PACKAGE_FFTW_PRECISION_LONG_DOUBLE
+	bool "long double precision"
+	help
+	  compile fftw in long-double precision
+
+config BR2_PACKAGE_FFTW_PRECISION_QUAD
+	bool "quad precision"
+	help
+	  compile fftw in quadruple precision if available
+
+endchoice
+
+endif
diff --git a/package/fftw/fftw.mk b/package/fftw/fftw.mk
index 3b302df..68ddc35 100644
--- a/package/fftw/fftw.mk
+++ b/package/fftw/fftw.mk
@@ -10,4 +10,14 @@ FFTW_INSTALL_STAGING = YES
 FFTW_LICENSE = GPLv2+
 FFTW_LICENSE_FILES = COPYING
 
+ifeq ($(BR2_PACKAGE_FFTW_PRECISION_SINGLE),y)
+FFTW_CONF_OPTS += --enable-single
+endif
+ifeq ($(BR2_PACKAGE_FFTW_PRECISION_LONG_DOUBLE),y)
+FFTW_CONF_OPTS += --enable-long-double
+endif
+ifeq ($(BR2_PACKAGE_FFTW_PRECISION_QUAD),y)
+FFTW_CONF_OPTS += --enable-quad-precision
+endif
+
 $(eval $(autotools-package))
-- 
2.0.5