1 files changed, 90 insertions, 0 deletions
diff --git a/Modules/CMakeDetermineCompileFeatures.cmake b/Modules/CMakeDetermineCompileFeatures.cmake
new file mode 100644
index 000000000..3ed92bee3
--- /dev/null
+++ b/Modules/CMakeDetermineCompileFeatures.cmake
@@ -0,0 +1,90 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+
+function(cmake_determine_compile_features lang)
+
+  if(lang STREQUAL C AND COMMAND cmake_record_c_compile_features)
+    message(STATUS "Detecting ${lang} compile features")
+
+    set(CMAKE_C90_COMPILE_FEATURES)
+    set(CMAKE_C99_COMPILE_FEATURES)
+    set(CMAKE_C11_COMPILE_FEATURES)
+
+    include("${CMAKE_ROOT}/Modules/Internal/FeatureTesting.cmake")
+
+    cmake_record_c_compile_features()
+
+    if(NOT _result EQUAL 0)
+      message(STATUS "Detecting ${lang} compile features - failed")
+      return()
+    endif()
+
+    if (CMAKE_C99_COMPILE_FEATURES AND CMAKE_C11_COMPILE_FEATURES)
+      list(REMOVE_ITEM CMAKE_C11_COMPILE_FEATURES ${CMAKE_C99_COMPILE_FEATURES})
+    endif()
+    if (CMAKE_C90_COMPILE_FEATURES AND CMAKE_C99_COMPILE_FEATURES)
+      list(REMOVE_ITEM CMAKE_C99_COMPILE_FEATURES ${CMAKE_C90_COMPILE_FEATURES})
+    endif()
+
+    if(NOT CMAKE_C_COMPILE_FEATURES)
+      set(CMAKE_C_COMPILE_FEATURES
+        ${CMAKE_C90_COMPILE_FEATURES}
+        ${CMAKE_C99_COMPILE_FEATURES}
+        ${CMAKE_C11_COMPILE_FEATURES}
+      )
+    endif()
+
+    set(CMAKE_C_COMPILE_FEATURES ${CMAKE_C_COMPILE_FEATURES} PARENT_SCOPE)
+    set(CMAKE_C90_COMPILE_FEATURES ${CMAKE_C90_COMPILE_FEATURES} PARENT_SCOPE)
+    set(CMAKE_C99_COMPILE_FEATURES ${CMAKE_C99_COMPILE_FEATURES} PARENT_SCOPE)
+    set(CMAKE_C11_COMPILE_FEATURES ${CMAKE_C11_COMPILE_FEATURES} PARENT_SCOPE)
+
+    message(STATUS "Detecting ${lang} compile features - done")
+
+  elseif(lang STREQUAL CXX AND COMMAND cmake_record_cxx_compile_features)
+    message(STATUS "Detecting ${lang} compile features")
+
+    set(CMAKE_CXX98_COMPILE_FEATURES)
+    set(CMAKE_CXX11_COMPILE_FEATURES)
+    set(CMAKE_CXX14_COMPILE_FEATURES)
+    set(CMAKE_CXX17_COMPILE_FEATURES)
+
+    include("${CMAKE_ROOT}/Modules/Internal/FeatureTesting.cmake")
+
+    cmake_record_cxx_compile_features()
+
+    if(NOT _result EQUAL 0)
+      message(STATUS "Detecting ${lang} compile features - failed")
+      return()
+    endif()
+
+    if (CMAKE_CXX14_COMPILE_FEATURES AND CMAKE_CXX17_COMPILE_FEATURES)
+      list(REMOVE_ITEM CMAKE_CXX17_COMPILE_FEATURES ${CMAKE_CXX14_COMPILE_FEATURES})
+    endif()
+    if (CMAKE_CXX11_COMPILE_FEATURES AND CMAKE_CXX14_COMPILE_FEATURES)
+      list(REMOVE_ITEM CMAKE_CXX14_COMPILE_FEATURES ${CMAKE_CXX11_COMPILE_FEATURES})
+    endif()
+    if (CMAKE_CXX98_COMPILE_FEATURES AND CMAKE_CXX11_COMPILE_FEATURES)
+      list(REMOVE_ITEM CMAKE_CXX11_COMPILE_FEATURES ${CMAKE_CXX98_COMPILE_FEATURES})
+    endif()
+
+    if(NOT CMAKE_CXX_COMPILE_FEATURES)
+      set(CMAKE_CXX_COMPILE_FEATURES
+        ${CMAKE_CXX98_COMPILE_FEATURES}
+        ${CMAKE_CXX11_COMPILE_FEATURES}
+        ${CMAKE_CXX14_COMPILE_FEATURES}
+        ${CMAKE_CXX17_COMPILE_FEATURES}
+      )
+    endif()
+
+    set(CMAKE_CXX_COMPILE_FEATURES ${CMAKE_CXX_COMPILE_FEATURES} PARENT_SCOPE)
+    set(CMAKE_CXX98_COMPILE_FEATURES ${CMAKE_CXX98_COMPILE_FEATURES} PARENT_SCOPE)
+    set(CMAKE_CXX11_COMPILE_FEATURES ${CMAKE_CXX11_COMPILE_FEATURES} PARENT_SCOPE)
+    set(CMAKE_CXX14_COMPILE_FEATURES ${CMAKE_CXX14_COMPILE_FEATURES} PARENT_SCOPE)
+    set(CMAKE_CXX17_COMPILE_FEATURES ${CMAKE_CXX17_COMPILE_FEATURES} PARENT_SCOPE)
+
+    message(STATUS "Detecting ${lang} compile features - done")
+  endif()
+
+endfunction()