diff --git a/recipes-extended/assimp/assimp/0001-Use-Assimp-namespace-to-fix-build-for-big-endian-arc.patch b/recipes-extended/assimp/assimp/0001-Use-Assimp-namespace-to-fix-build-for-big-endian-arc.patch
new file mode 100644
index 0000000..e0e2a50
--- /dev/null
+++ b/recipes-extended/assimp/assimp/0001-Use-Assimp-namespace-to-fix-build-for-big-endian-arc.patch
@@ -0,0 +1,33 @@
+From c2c12c1db5c8d7610ad46b1970aabf4afde0eef4 Mon Sep 17 00:00:00 2001
+From: Daniel Knezevic <danielknezevic90@gmail.com>
+Date: Thu, 18 Aug 2016 10:51:20 +0200
+Subject: [PATCH] Use Assimp namespace to fix build for big-endian
+ architectures
+
+Upstream-Status: Backport [https://github.com/assimp/assimp/commit/c2c12c1db5c8d7610ad46b1970aabf4afde0eef4]
+
+This patch has been generated with:
+  `git format-patch -1 c2c12c1db5c8d7610ad46b1970aabf4afde0eef4`
+in the assimp repository.
+
+Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
+---
+ code/glTFAsset.inl | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/code/glTFAsset.inl b/code/glTFAsset.inl
+index d52c825..470246c 100644
+--- a/code/glTFAsset.inl
++++ b/code/glTFAsset.inl
+@@ -40,6 +40,8 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ 
+ #include "StringUtils.h"
+ 
++using namespace Assimp;
++
+ namespace glTF {
+ 
+ namespace {
+-- 
+1.9.1
+
diff --git a/recipes-extended/assimp/assimp_3.1.1.bb b/recipes-extended/assimp/assimp_3.1.1.bb
deleted file mode 100644
index 8c01603..0000000
--- a/recipes-extended/assimp/assimp_3.1.1.bb
+++ /dev/null
@@ -1,16 +0,0 @@
-DESCRIPTION = "Open Asset Import Library"
-SECTION = "devel"
-LICENSE = "BSD"
-LIC_FILES_CHKSUM = "file://LICENSE;md5=bc4231a2268da8fc55525ad119638a87"
-
-DEPENDS = "boost"
-
-SRC_URI = "https://downloads.sourceforge.net/project/${PN}/${PN}-3.1/${PN}-${PV}_no_test_models.zip"
-SRC_URI[md5sum] = "ccd4788204509da58a3a53c7aeda7a8b"
-SRC_URI[sha256sum] = "da9827876f10a8b447270368753392cfd502e70a2e9d1361554e5dfcb1fede9e"
-
-S = "${WORKDIR}/${PN}-${PV}"
-
-inherit cmake
-
-FILES_${PN}-dev += "${libdir}/cmake/assimp-3.1/*.cmake"
diff --git a/recipes-extended/assimp/assimp_3.3.1.bb b/recipes-extended/assimp/assimp_3.3.1.bb
new file mode 100644
index 0000000..7741422
--- /dev/null
+++ b/recipes-extended/assimp/assimp_3.3.1.bb
@@ -0,0 +1,18 @@
+DESCRIPTION = "Open Asset Import Library"
+SECTION = "devel"
+LICENSE = "BSD"
+LIC_FILES_CHKSUM = "file://LICENSE;md5=4cd8c0aedc7a0623476669377d7eeda8"
+
+DEPENDS = "boost"
+
+SRC_URI = "https://github.com/${PN}/${PN}/archive/v${PV}.tar.gz;downloadfilename=${PN}-${PV}.tar.gz"
+SRC_URI[md5sum] = "fc57b024e80ebb13301bd0983826cad3"
+SRC_URI[sha256sum] = "d385c3f90876241343f09e45f4e5033a6a05861b971c63d1f6d512371ffdc7bf"
+
+SRC_URI += "file://0001-Use-Assimp-namespace-to-fix-build-for-big-endian-arc.patch"
+
+S = "${WORKDIR}/${PN}-${PV}"
+
+inherit cmake
+
+FILES_${PN}-dev += "${libdir}/cmake/assimp-3.3/*.cmake"
diff --git a/recipes-ros/mavros/mavros/0001-CMake-explicitly-link-the-atomic-library-797.patch b/recipes-ros/mavros/mavros/0001-CMake-explicitly-link-the-atomic-library-797.patch
new file mode 100644
index 0000000..780ad41
--- /dev/null
+++ b/recipes-ros/mavros/mavros/0001-CMake-explicitly-link-the-atomic-library-797.patch
@@ -0,0 +1,56 @@
+From 658347978fc97675dbdff480f4557eb772e915dc Mon Sep 17 00:00:00 2001
+From: Lukas Bulwahn <lukas.bulwahn@gmail.com>
+Date: Mon, 4 Sep 2017 16:17:12 +0100
+Subject: [PATCH] CMake: explicitly link the atomic library (#797)
+
+For arm & mips architecture, the linker must explicitly be asked to
+link the atomic library (with `-latomic`).
+
+Otherwise, the linking fails with:
+
+```
+| devel/lib/libmavros.so: undefined reference to `__atomic_load_8'
+| devel/lib/libmavros.so: undefined reference to `__atomic_store_8'
+| collect2: error: ld returned 1 exit status
+```
+
+Linking `atomic` unconditionally as library is strictly needed only
+for arm & mips, but it seems not to imply any further differences
+with other architectures. Hence, this commit simply adds `atomic`
+unconditionally for a uniform handling of all machine architectures.
+
+This is an alternative solution to the proposed solution in #790.
+
+The issue was discovered cross-compiling mavros in meta-ros, the
+OpenEmbedded layer for ROS. Some further pointers are available at:
+
+  https://github.com/bmwcarit/meta-ros/issues/525
+
+Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
+
+Upstream-Status: Accepted [https://github.com/mavlink/mavros/commit/658347978fc97675dbdff480f4557eb772e915dc]
+
+This patch has been generated with:
+  `git format-patch -1 658347978fc97675dbdff480f4557eb772e915dc`
+in the mavros repository.
+
+Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
+---
+ mavros/CMakeLists.txt | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/mavros/CMakeLists.txt b/mavros/CMakeLists.txt
+index a4ac3cb..5233e96 100644
+--- a/mavros/CMakeLists.txt
++++ b/mavros/CMakeLists.txt
+@@ -102,6 +102,7 @@ add_library(mavros
+   src/lib/rosconsole_bridge.cpp
+ )
+ target_link_libraries(mavros
++  atomic
+   ${catkin_LIBRARIES}
+   ${Boost_LIBRARIES}
+   ${GeographicLib_LIBRARIES}
+-- 
+1.9.1
+
diff --git a/recipes-ros/mavros/mavros_0.18.7.bb b/recipes-ros/mavros/mavros_0.18.7.bb
index e941aaa..870c681 100644
--- a/recipes-ros/mavros/mavros_0.18.7.bb
+++ b/recipes-ros/mavros/mavros_0.18.7.bb
@@ -48,4 +48,5 @@ require mavros.inc
 
 ROS_PKG_SUBDIR = "mavros"
 
-SRC_URI += "file://0001-always-find-Eigen-with-cmake_modules-mechanism.patch;striplevel=2"
+SRC_URI += "file://0001-always-find-Eigen-with-cmake_modules-mechanism.patch;striplevel=2 \
+            file://0001-CMake-explicitly-link-the-atomic-library-797.patch;striplevel=2"