commit 21e497fe6323b84e34c925e740f242edd6821c40
author Brad King <brad.king@kitware.com> Wed Jul 29 13:02:21 2020 -0400
committer Brad King <brad.king@kitware.com> Wed Jul 29 13:02:21 2020 -0400
tree 85c819f7200cd760efc60b87f19ea2ab95f269c7
parent d421274e3e11a0e6480358faa8a8e5cf48d7b3c2

Clang: Fix fallback compile features when simulating old MSVC versions

Refactoring in commit 25439c7d62 (Clang: Refactor CXX standard flags
into __compiler_clang_cxx_standards(), 2020-03-16, v3.18.0-rc1~362^2~4)
accidentally broke the `cxx_std_*` fallback feature names.

Issue: #21033

Modules/Compiler/Clang.cmake

diff --git a/Modules/Compiler/Clang.cmake b/Modules/Compiler/Clang.cmake
index bb516d3..52d5350 100644
--- a/Modules/Compiler/Clang.cmake
+++ b/Modules/Compiler/Clang.cmake
@@ -222,11 +222,11 @@
     # can be attempted.
     macro(cmake_record_${lang}_compile_features)
       list(APPEND CMAKE_${lang}_COMPILE_FEATURES
-        ${lang}_std_98
-        ${lang}_std_11
-        ${lang}_std_14
-        ${lang}_std_17
-        ${lang}_std_20
+        cxx_std_98
+        cxx_std_11
+        cxx_std_14
+        cxx_std_17
+        cxx_std_20
         )
       _record_compiler_features(${lang} "" CMAKE_${lang}_COMPILE_FEATURES)
     endmacro()