libiio: Bump version to 0.7

The two previous patches have been merged upstream, so they have been
deleted here. Another patch (picked from upstream) has been added to fix
the build with thread-less toolchains.

Libiio v0.7 provides two new backends, a USB backend (using libusb-1.0)
and a serial backend (using libserialport).

Additionally, it is now possible to compile libiio with thread-less
toolchains. In that case, thread safety is disabled.

Signed-off-by: Paul Cercueil <paul.cercueil@analog.com>
Reviewed-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/libiio/0001-cmake-libxml2-detection-try-first-the-CMake-module-f.patch

@@ -1,43 +0,0 @@
-From b613e0fe7999cfff9efb646eb388ea1e58952e30 Mon Sep 17 00:00:00 2001
-From: Samuel Martin <s.martin49@gmail.com>
-Date: Thu, 14 Apr 2016 12:59:27 -0400
-Subject: [PATCH] cmake: libxml2 detection: try CMake module from libxml2
-
-Libxml2 >=2.9.2 provides its own CMake module, so check for it before
-falling back on the CMake's module FindLibXml2.cmake.
-
-Updated for v0.6 by: Matt Fornero <matt.fornero@mathworks.com>
-
-Signed-off-by: Samuel Martin <s.martin49@gmail.com>
-Signed-off-by: Matt Fornero <matt.fornero@mathworks.com>
----
- CMakeLists.txt |   13 ++++++++++++-
- 1 file changed, 12 insertions(+), 1 deletion(-)
-
-diff --git a/CMakeLists.txt b/CMakeLists.txt
-index 70f61f0..4a4209b 100644
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -143,7 +143,18 @@ if(WITH_NETWORK_BACKEND)
- endif()
- 
- if (NEED_LIBXML2)
--	include(FindLibXml2)
-+	# Since libxml2-2.9.2, libxml2 provides its own LibXml2-config.cmake, with all
-+	# variables correctly set.
-+	# So, try first to find the CMake module provided by libxml2 package, then fallback
-+	# on the CMake's FindLibXml2.cmake module (which can lack some definition, especially
-+	# in static build case).
-+	find_package(LibXml2 QUIET NO_MODULE)
-+	if(DEFINED LIBXML2_VERSION_STRING)
-+		set(LIBXML2_FOUND ON)
-+		set(LIBXML2_INCLUDE_DIR ${LIBXML2_INCLUDE_DIRS})
-+	else()
-+		include(FindLibXml2)
-+	endif()
- 
- 	if (NOT LIBXML2_FOUND)
- 		message(SEND_ERROR "The selected backends require libxml2 to be installed")
--- 
-1.7.10.4
-

package/libiio/0001-lock.c-Don-t-include-pthread.h-if-NO_THREADS-is-defi.patch

@@ -0,0 +1,26 @@
+From d052d263600549979a6219a59e85af80eeafc6d2 Mon Sep 17 00:00:00 2001
+From: Paul Cercueil <paul.cercueil@analog.com>
+Date: Tue, 5 Jul 2016 12:12:41 +0200
+Subject: [PATCH] lock.c: Don't include <pthread.h> if NO_THREADS is defined
+
+Signed-off-by: Paul Cercueil <paul.cercueil@analog.com>
+---
+ lock.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/lock.c b/lock.c
+index 39248ab..00eb9d9 100644
+--- a/lock.c
++++ b/lock.c
+@@ -18,7 +18,7 @@
+ 
+ #ifdef _WIN32
+ #include <windows.h>
+-#else
++#elif !defined(NO_THREADS)
+ #include <pthread.h>
+ #endif
+ 
+-- 
+2.8.1
+

package/libiio/0002-IIOD-Link-pthread-with-no-network-backend.patch

@@ -1,30 +0,0 @@
-From 8dcb6c3f60123511d77b9fc7e4e22ae710e7d2f4 Mon Sep 17 00:00:00 2001
-From: Matthew Fornero <mfornero@mathworks.com>
-Date: Wed, 8 Jun 2016 20:03:56 -0400
-Subject: [PATCH] IIOD: Link pthread with no network backend
-
-If iiod is built without the network backend, CMake will not link in
-pthreads. Update the CMake configuration to accomodate this case.
-
-Signed-off-by: Matthew Fornero <mfornero@mathworks.com>
----
- CMakeLists.txt |    3 +++
- 1 file changed, 3 insertions(+)
-
-diff --git a/CMakeLists.txt b/CMakeLists.txt
-index 70f61f0..20fa9f1 100644
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -56,6 +56,9 @@ IF(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
- 	if (WITH_IIOD AND NOT WITH_LOCAL_BACKEND)
- 		message(SEND_ERROR "IIOD can only be enabled if the local backend is enabled")
- 	endif()
-+	if (WITH_IIOD)
-+		set(NEED_THREADS 1)
-+	endif()
- endif()
- 
- option(ENABLE_IPV6 "Define if you want to enable IPv6 support" ON)
--- 
-1.7.10.4
-

package/libiio/Config.in

@@ -1,6 +1,6 @@
 config BR2_PACKAGE_LIBIIO
 	bool "libiio"
-	select BR2_PACKAGE_LIBIIO_LOCAL_BACKEND if !BR2_PACKAGE_LIBIIO_NETWORK_BACKEND
+	select BR2_PACKAGE_LIBIIO_LOCAL_BACKEND if !BR2_PACKAGE_LIBIIO_XML_BACKEND
 	help
 	  Libiio is a library to ease the development of software
 	  interfacing Linux Industrial I/O (IIO) devices.
@@ -15,17 +15,40 @@ config BR2_PACKAGE_LIBIIO_LOCAL_BACKEND
 	help
 	  Enable the local backend of the library.
 
+config BR2_PACKAGE_LIBIIO_XML_BACKEND
+	bool "XML backend"
+	select BR2_PACKAGE_LIBXML2
+	default y
+	help
+	  Enable the XML backend of the library.
+
 config BR2_PACKAGE_LIBIIO_NETWORK_BACKEND
 	bool "Network backend"
-	depends on BR2_TOOLCHAIN_HAS_THREADS
-	select BR2_PACKAGE_LIBXML2
+	depends on BR2_PACKAGE_LIBIIO_XML_BACKEND
 	default y
 	help
 	  Enable the network backend of the library.
 
-comment "IIO Network backend needs a toolchain w/ threads"
+config BR2_PACKAGE_LIBIIO_USB_BACKEND
+	bool "USB backend"
+	depends on BR2_TOOLCHAIN_HAS_THREADS # from libusb
+	depends on BR2_PACKAGE_LIBIIO_XML_BACKEND
+	select BR2_PACKAGE_LIBUSB
+	default y
+	help
+	  Enable the USB backend of the library.
+
+comment "The USB backend needs a toolchain w/ threads"
 	depends on !BR2_TOOLCHAIN_HAS_THREADS
 
+config BR2_PACKAGE_LIBIIO_SERIAL_BACKEND
+	bool "Serial backend"
+	depends on BR2_PACKAGE_LIBIIO_XML_BACKEND
+	select BR2_PACKAGE_LIBSERIALPORT
+	default y
+	help
+	  Enable the serial backend of the library.
+
 config BR2_PACKAGE_LIBIIO_IIOD
 	bool "IIO Daemon"
 	select BR2_PACKAGE_LIBIIO_LOCAL_BACKEND

package/libiio/libiio.hash

@@ -1,2 +1,2 @@
-# From https://github.com/analogdevicesinc/libiio/archive/v0.6/
-sha256  efd3b4ebdba01dd2bfbdce8e222356b4fec2b96daab14f99691b5c1c9089e466    libiio-0.6.tar.gz
+# From https://github.com/analogdevicesinc/libiio/archive/v0.7/
+sha256	c2b02f1cb51870db52368fdaa8087dc2a4ec43f2bc3c3514d8214952f14c3f39	libiio-0.7.tar.gz

package/libiio/libiio.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-LIBIIO_VERSION = 0.6
+LIBIIO_VERSION = 0.7
 LIBIIO_SITE = $(call github,analogdevicesinc,libiio,v$(LIBIIO_VERSION))
 LIBIIO_INSTALL_STAGING = YES
 LIBIIO_LICENSE = LGPLv2.1+
@@ -12,14 +12,29 @@ LIBIIO_LICENSE_FILES = COPYING.txt
 
 LIBIIO_CONF_OPTS = -DENABLE_IPV6=ON \
 	-DWITH_LOCAL_BACKEND=$(if $(BR2_PACKAGE_LIBIIO_LOCAL_BACKEND),ON,OFF) \
+	-DWITH_NETWORK_BACKEND=$(if $(BR2_PACKAGE_LIBIIO_NETWORK_BACKEND),ON,OFF) \
 	-DWITH_TESTS=$(if $(BR2_PACKAGE_LIBIIO_TESTS),ON,OFF) \
 	-DWITH_DOC=OFF
 
-ifeq ($(BR2_PACKAGE_LIBIIO_NETWORK_BACKEND),y)
+ifeq ($(BR2_PACKAGE_LIBIIO_XML_BACKEND),y)
 LIBIIO_DEPENDENCIES += libxml2
-LIBIIO_CONF_OPTS += -DWITH_NETWORK_BACKEND=ON
+LIBIIO_CONF_OPTS += -DWITH_XML_BACKEND=ON
 else
-LIBIIO_CONF_OPTS += -DWITH_NETWORK_BACKEND=OFF
+LIBIIO_CONF_OPTS += -DWITH_XML_BACKEND=OFF
+endif
+
+ifeq ($(BR2_PACKAGE_LIBIIO_USB_BACKEND),y)
+LIBIIO_DEPENDENCIES += libusb
+LIBIIO_CONF_OPTS += -DWITH_USB_BACKEND=ON
+else
+LIBIIO_CONF_OPTS += -DWITH_USB_BACKEND=OFF
+endif
+
+ifeq ($(BR2_PACKAGE_LIBIIO_SERIAL_BACKEND),y)
+LIBIIO_DEPENDENCIES += libserialport
+LIBIIO_CONF_OPTS += -DWITH_SERIAL_BACKEND=ON
+else
+LIBIIO_CONF_OPTS += -DWITH_SERIAL_BACKEND=OFF
 endif
 
 ifeq ($(BR2_PACKAGE_LIBIIO_IIOD),y)