diff --git a/cmake/compiler.cmake b/cmake/compiler.cmake
index 316b0632c6..56e13845d8 100644
--- a/cmake/compiler.cmake
+++ b/cmake/compiler.cmake
@@ -17,10 +17,8 @@ if (WIN32)
   # if you get build error about missing 'glu32' this path is likely wrong
   if (MSVC_VERSION GREATER_EQUAL 1910) # VS 2017
     set(WINDOW_SDK_PATH "C:/Program Files (x86)/Windows Kits/10/Lib/${CMAKE_VS_WINDOWS_TARGET_PLATFORM_VERSION}/x64" CACHE PATH "Windows SDK PATH")
-  elseif (MSVC_VERSION GREATER_EQUAL 1800) # VS 2013
-    set(WINDOW_SDK_PATH "C:\\Program Files (x86)\\Windows Kits\\8.1\\Lib\\winv6.3\\um\\${WINDOW_SDK_FOLDER}" CACHE PATH "Windows SDK PATH")
   else()
-    message( FATAL_ERROR "Visual Studio 2013 or higher required." )
+    message( FATAL_ERROR "Visual Studio 2017 or higher required." )
   endif()
 
   if (DEBUG_DISCOVERED_SDK_PATH)
@@ -41,39 +39,16 @@ if (WIN32)
 else ()
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -fno-strict-aliasing -Wno-unused-parameter")
   if (CMAKE_CXX_COMPILER_ID MATCHES "GNU")
-      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -ggdb -Woverloaded-virtual -Wdouble-promotion")
-      if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER "5.1") # gcc 5.1 and on have suggest-override
-          set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wsuggest-override")
-      endif ()
-      if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "5.3")
-          # GLM 0.9.8 on Ubuntu 14 (gcc 4.4) has issues with the simd declarations
-          add_definitions(-DGLM_FORCE_PURE)
-      endif()
+      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -ggdb -Woverloaded-virtual -Wdouble-promotion -Wsuggest-override")
   endif ()
 endif()
 
-if (ANDROID)
-    # assume that the toolchain selected for android has C++11 support
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14")
-elseif(APPLE)
-  set(CMAKE_XCODE_ATTRIBUTE_CLANG_CXX_LANGUAGE_STANDARD "c++14")
-  set(CMAKE_XCODE_ATTRIBUTE_CLANG_CXX_LIBRARY "libc++")
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} --stdlib=libc++")
-  if (CMAKE_GENERATOR STREQUAL "Xcode")
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g")
-    set(CMAKE_XCODE_ATTRIBUTE_GCC_GENERATE_DEBUGGING_SYMBOLS[variant=Release] "YES")
-    set(CMAKE_XCODE_ATTRIBUTE_DEBUG_INFORMATION_FORMAT[variant=Release] "dwarf-with-dsym")
-    set(CMAKE_XCODE_ATTRIBUTE_DEPLOYMENT_POSTPROCESSING[variant=Release] "YES")
-  endif()
-elseif ((NOT MSVC12) AND (NOT MSVC14))
-    include(CheckCXXCompilerFlag)
-    CHECK_CXX_COMPILER_FLAG("-std=c++14" COMPILER_SUPPORTS_CXX14)
-    if (COMPILER_SUPPORTS_CXX14)
-        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14")
-    else()
-        message(FATAL_ERROR  "The compiler ${CMAKE_CXX_COMPILER} has no C++11 support. Please use a different C++ compiler.")
-    endif()
-endif ()
+if ((APPLE) AND (CMAKE_GENERATOR STREQUAL "Xcode"))
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g")
+  set(CMAKE_XCODE_ATTRIBUTE_GCC_GENERATE_DEBUGGING_SYMBOLS[variant=Release] "YES")
+  set(CMAKE_XCODE_ATTRIBUTE_DEBUG_INFORMATION_FORMAT[variant=Release] "dwarf-with-dsym")
+  set(CMAKE_XCODE_ATTRIBUTE_DEPLOYMENT_POSTPROCESSING[variant=Release] "YES")
+endif()
 
 
 if (NOT ANDROID_LIB_DIR)
diff --git a/cmake/init.cmake b/cmake/init.cmake
index e9d1891d6b..d81352903e 100644
--- a/cmake/init.cmake
+++ b/cmake/init.cmake
@@ -1,19 +1,3 @@
-if (WIN32)
-  cmake_policy(SET CMP0020 NEW)
-endif (WIN32)
-
-if (POLICY CMP0043)
-  cmake_policy(SET CMP0043 NEW)
-endif ()
-
-if (POLICY CMP0042)
-  cmake_policy(SET CMP0042 NEW)
-endif ()
-
-if (POLICY CMP0074)
-  cmake_policy(SET CMP0074 NEW)
-endif ()
-
 set_property(GLOBAL PROPERTY USE_FOLDERS ON)
 set_property(GLOBAL PROPERTY PREDEFINED_TARGETS_FOLDER "CMakeTargets")
 # Hide automoc folders (for IDEs)