bluez-utils: Add GATT support

This allows to compile gatttool which can help use Bluetooth Low Energy
devices.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/bluez_utils/Config.in

@@ -36,6 +36,13 @@ config BR2_PACKAGE_BLUEZ_UTILS_USB
 	help
 	  USB support
 
+config BR2_PACKAGE_BLUEZ_UTILS_GATT
+	bool "GATT support"
+	select BR2_PACKAGE_READLINE
+	help
+	  Generic Attribute Profile (GATT) support. This provides profile
+	  discovery and description services for Bluetooth Low Energy.
+	  This will install the gatttool utility.
 endif
 
 comment "bluez-utils needs a toolchain w/ wchar, threads"

package/bluez_utils/bluez_utils.mk

@@ -37,6 +37,13 @@ BLUEZ_UTILS_CONF_OPT +=	\
 	--disable-audio
 endif
 
+ifeq ($(BR2_PACKAGE_BLUEZ_UTILS_GATT),y)
+BLUEZ_UTILS_DEPENDENCIES += readline
+BLUEZ_UTILS_CONF_OPT += --enable-gatt
+else
+BLUEZ_UTILS_CONF_OPT += --disable-gatt
+endif
+
 # USB support
 ifeq ($(BR2_PACKAGE_BLUEZ_UTILS_USB),y)
 BLUEZ_UTILS_DEPENDENCIES += libusb