diff --git a/CMake/external_catch2.cmake b/CMake/external_catch2.cmake
index 73e46ff9cd..aab0a97fa4 100644
--- a/CMake/external_catch2.cmake
+++ b/CMake/external_catch2.cmake
@@ -15,7 +15,7 @@ function(get_catch2)
     # So instead, we invoke a new CMake project just to download it:
     configure_file( CMake/catch2-download.cmake.in
                     ${CMAKE_BINARY_DIR}/external-projects/catch2-download/CMakeLists.txt )
-    execute_process( COMMAND "${CMAKE_COMMAND}" -G "${CMAKE_GENERATOR}" .
+    execute_process( COMMAND "${CMAKE_COMMAND}" -G "${CMAKE_GENERATOR}" . "--no-warn-unused-cli"
                      -DCMAKE_MAKE_PROGRAM=${CMAKE_MAKE_PROGRAM}
                      -DCMAKE_TOOLCHAIN_FILE=${CMAKE_TOOLCHAIN_FILE}
                      -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
diff --git a/CMake/external_json.cmake b/CMake/external_json.cmake
index 6efbf39bea..69c84ffeec 100644
--- a/CMake/external_json.cmake
+++ b/CMake/external_json.cmake
@@ -18,7 +18,7 @@ function(get_nlohmann_json)
     # So instead, we invoke a new CMake project just to download pybind:
     configure_file( CMake/json-download.cmake.in
                     ${CMAKE_BINARY_DIR}/external-projects/json-download/CMakeLists.txt )
-    execute_process( COMMAND "${CMAKE_COMMAND}" -G "${CMAKE_GENERATOR}" .
+    execute_process( COMMAND "${CMAKE_COMMAND}" -G "${CMAKE_GENERATOR}" . "--no-warn-unused-cli"
                      -DCMAKE_MAKE_PROGRAM=${CMAKE_MAKE_PROGRAM}
                      -DCMAKE_TOOLCHAIN_FILE=${CMAKE_TOOLCHAIN_FILE}
                      -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
diff --git a/CMake/external_libusb.cmake b/CMake/external_libusb.cmake
index 22acb98f51..7d32981932 100644
--- a/CMake/external_libusb.cmake
+++ b/CMake/external_libusb.cmake
@@ -20,6 +20,7 @@ ExternalProject_Add(
             -DANDROID_ABI=${ANDROID_ABI}
             -DANDROID_STL=${ANDROID_STL}
             -DCMAKE_INSTALL_PREFIX=${CMAKE_CURRENT_BINARY_DIR}/libusb_install
+            --no-warn-unused-cli
     TEST_COMMAND ""
     BUILD_BYPRODUCTS ${CMAKE_CURRENT_BINARY_DIR}/libusb_install/lib/${CMAKE_STATIC_LIBRARY_PREFIX}usb${CMAKE_STATIC_LIBRARY_SUFFIX}
 )
diff --git a/src/cuda/cuda-pointcloud.cu b/src/cuda/cuda-pointcloud.cu
index b0557dd74d..2f0188b036 100644
--- a/src/cuda/cuda-pointcloud.cu
+++ b/src/cuda/cuda-pointcloud.cu
@@ -107,6 +107,8 @@ void rscuda::deproject_depth_cuda(float * points, const rs2_intrinsics & intrin,
      result = cudaMemcpy(points, dev_points, count * sizeof(float) * 3, cudaMemcpyDeviceToHost);
      assert(result == cudaSuccess);
 
+     if (result); // suppress warning about "variable "result" was set but never used"
+
     cudaFree(dev_points);
     cudaFree(dev_depth);
     cudaFree(dev_intrin);
diff --git a/third-party/libusb/CMakeLists.txt b/third-party/libusb/CMakeLists.txt
index ce9cd49292..69fb41c2cd 100644
--- a/third-party/libusb/CMakeLists.txt
+++ b/third-party/libusb/CMakeLists.txt
@@ -1,7 +1,5 @@
-# ubuntu 12.04 LTS cmake version 2.8.7
-# ubuntu 14.04 LTS cmake version 2.8.12.2
-# ubuntu 16.04 LTS cmake version 3.5.1	
-cmake_minimum_required(VERSION 2.8.3)
+# our current cmake version is 3.8
+cmake_minimum_required(VERSION 3.8)
 
 project(usb)
 
diff --git a/unit-tests/LRS_jetson_compile_pipeline.stats b/unit-tests/LRS_jetson_compile_pipeline.stats
index a7f300cca2..96258f3a93 100644
--- a/unit-tests/LRS_jetson_compile_pipeline.stats
+++ b/unit-tests/LRS_jetson_compile_pipeline.stats
@@ -1,2 +1,2 @@
-warnings 1
+warnings 0
 
diff --git a/unit-tests/LRS_windows_compile_pipeline.stats b/unit-tests/LRS_windows_compile_pipeline.stats
index a7f300cca2..96258f3a93 100644
--- a/unit-tests/LRS_windows_compile_pipeline.stats
+++ b/unit-tests/LRS_windows_compile_pipeline.stats
@@ -1,2 +1,2 @@
-warnings 1
+warnings 0