libiio: update and improve recipe

* Update to latest version 0.14.
* Make depends on avahi, libusb1 and libxml2 optional by
  PACKAGECONFIG or DISTRO flags.
* Install iiod.service file

Signed-off-by: Adrian Freihofer <adrian.freihofer@gmail.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

meta-oe/recipes-support/libiio/libiio_git.bb

@@ -4,21 +4,41 @@ SECTION = "libs"
 LICENSE = "LGPLv2.1+"
 LIC_FILES_CHKSUM = "file://COPYING.txt;md5=7c13b3376cea0ce68d2d2da0a1b3a72c"
 
-SRCREV = "08f947d5e40600259bb698c3b95538e9f2bfecc2"
-PV = "0.8+git${SRCPV}"
+SRCREV = "fa82974d8bd1fded78e630ab71a7ded1b11d0e33"
+PV = "0.14+git${SRCPV}"
 
-SRC_URI = "git://github.com/analogdevicesinc/libiio.git"
+SRC_URI = "git://github.com/analogdevicesinc/libiio.git;protocol=https"
 
 S = "${WORKDIR}/git"
 
-DEPENDS = "flex-native bison-native avahi libaio libusb1 libxml2"
+inherit cmake pythonnative systemd
 
-inherit cmake pythonnative
+DEPENDS = " \
+    flex-native bison-native libaio \
+    ${@bb.utils.contains('DISTRO_FEATURES', 'zeroconf', 'avahi', '', d)} \
+"
+
+EXTRA_OECMAKE = " \
+    -DCMAKE_BUILD_TYPE=RelWithDebInfo \
+    -DUDEV_RULES_INSTALL_DIR=${nonarch_base_libdir}/udev/rules.d \
+    ${@bb.utils.contains('DISTRO_FEATURES', 'systemd', '-DWITH_SYSTEMD=ON -DSYSTEMD_UNIT_INSTALL_DIR=${systemd_system_unitdir}', '', d)} \
+"
+
+PACKAGECONFIG ??= "USB_BACKEND NETWORK_BACKEND"
+
+PACKAGECONFIG[USB_BACKEND] = "-DWITH_USB_BACKEND=ON,-DWITH_USB_BACKEND=OFF,libusb1,libxml2"
+PACKAGECONFIG[NETWORK_BACKEND] = "-DWITH_NETWORK_BACKEND=ON,-DWITH_NETWORK_BACKEND=OFF,libxml2"
 
 PACKAGES =+ "${PN}-iiod ${PN}-tests ${PN}-python"
 
 RDEPENDS_${PN}-python = "${PN} python-ctypes python-stringold"
 
-FILES_${PN}-iiod = "${sbindir}/iiod"
+FILES_${PN}-iiod = " \
+    ${sbindir}/iiod \
+    ${systemd_system_unitdir}/iiod.service \
+"
 FILES_${PN}-tests = "${bindir}"
 FILES_${PN}-python = "${PYTHON_SITEPACKAGES_DIR}"
+
+SYSTEMD_PACKAGES = "${PN}-iiod"
+SYSTEMD_SERVICE_${PN}-iiod = "iiod.service"