diff --git a/contrib/iOS.cmake b/contrib/iOS.cmake
index c929aa21a..933cd6bdc 100644
--- a/contrib/iOS.cmake
+++ b/contrib/iOS.cmake
@@ -28,6 +28,8 @@
 #  A macro used to find executable programs on the host system, not within the iOS environment.
 #  Thanks to the android-cmake project for providing the command
 
+cmake_minimum_required(VERSION 3.5)
+
 # Standard settings
 set (CMAKE_SYSTEM_NAME Darwin)
 set (CMAKE_SYSTEM_VERSION 1)
@@ -42,7 +44,7 @@ set (CMAKE_OSX_DEPLOYMENT_TARGET "" CACHE STRING "Force unset of the deployment
 # Determine the cmake host system version so we know where to find the iOS SDKs
 find_program (CMAKE_UNAME uname /bin /usr/bin /usr/local/bin)
 if (CMAKE_UNAME)
-	exec_program(uname ARGS -r OUTPUT_VARIABLE CMAKE_HOST_SYSTEM_VERSION)
+	execute_process(COMMAND uname -r OUTPUT_VARIABLE CMAKE_HOST_SYSTEM_VERSION)
 	string (REGEX REPLACE "^([0-9]+)\\.([0-9]+).*$" "\\1" DARWIN_MAJOR_VERSION "${CMAKE_HOST_SYSTEM_VERSION}")
 endif (CMAKE_UNAME)
 
@@ -132,7 +134,7 @@ endif ()
 
 # Setup iOS developer location unless specified manually with CMAKE_IOS_DEVELOPER_ROOT
 # Note Xcode 4.3 changed the installation location, choose the most recent one available
-exec_program(/usr/bin/xcode-select ARGS -print-path OUTPUT_VARIABLE CMAKE_XCODE_DEVELOPER_DIR)
+execute_process(COMMAND /usr/bin/xcode-select -print-path OUTPUT_VARIABLE CMAKE_XCODE_DEVELOPER_DIR OUTPUT_STRIP_TRAILING_WHITESPACE)
 set (XCODE_POST_43_ROOT "${CMAKE_XCODE_DEVELOPER_DIR}/Platforms/${IOS_PLATFORM_LOCATION}/Developer")
 set (XCODE_PRE_43_ROOT "/Developer/Platforms/${IOS_PLATFORM_LOCATION}/Developer")
 if (NOT DEFINED CMAKE_IOS_DEVELOPER_ROOT)