Merge topic 'intel-c++20' into release-3.18

99c8dbf497 Intel: Add flags for C++20

Acked-by: Kitware Robot <[email protected]>
Merge-request: !4946

Modules/Compiler/Intel-CXX.cmake

@@ -11,6 +11,11 @@ if("x${CMAKE_CXX_SIMULATE_ID}" STREQUAL "xMSVC")
 
   set(CMAKE_CXX_CLANG_TIDY_DRIVER_MODE "cl")
 
+  if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 19.0.0)
+    set(CMAKE_CXX20_STANDARD_COMPILE_OPTION "-Qstd=c++20")
+    set(CMAKE_CXX20_EXTENSION_COMPILE_OPTION "-Qstd=c++20")
+  endif()
+
   if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 18.0.0)
     set(CMAKE_CXX17_STANDARD_COMPILE_OPTION "-Qstd=c++17")
     set(CMAKE_CXX17_EXTENSION_COMPILE_OPTION "-Qstd=c++17")
@@ -37,6 +42,11 @@ if("x${CMAKE_CXX_SIMULATE_ID}" STREQUAL "xMSVC")
 
 else()
 
+  if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 19.0.0)
+    set(CMAKE_CXX20_STANDARD_COMPILE_OPTION "-std=c++20")
+    set(CMAKE_CXX20_EXTENSION_COMPILE_OPTION "-std=gnu++20")
+  endif()
+
   if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 18.0.0)
     set(CMAKE_CXX17_STANDARD_COMPILE_OPTION "-std=c++17")
     set(CMAKE_CXX17_EXTENSION_COMPILE_OPTION "-std=gnu++17")