[cmake] Bumping cmake minimum version to 3.5 to align with Embree

Author: sherholz-intel

CMakeLists.txt

@@ -3,7 +3,7 @@
 
 ## Global CMake options ##
 
-cmake_minimum_required(VERSION 3.1)
+cmake_minimum_required(VERSION 3.5)
 
 set(CMAKE_C_STANDARD 99)
 set(CMAKE_C_STANDARD_REQUIRED ON)

cmake/FindTBB.cmake

@@ -37,7 +37,7 @@
 #===============================================================================
 
 # We use INTERFACE libraries, which are only supported in 3.x
-cmake_minimum_required(VERSION 3.1)
+cmake_minimum_required(VERSION 3.5)
 
 # These two are used to automatically find the root and include directories.
 set(_TBB_INCLUDE_SUBDIR "include")

superbuild/CMakeLists.txt

@@ -3,7 +3,7 @@
 
 ## Global settings ##
 
-cmake_minimum_required(VERSION 3.1)
+cmake_minimum_required(VERSION 3.5)
 
 set(CMAKE_MODULE_PATH
   ${CMAKE_MODULE_PATH}