From b365385d669d1a04cbc677cf2c7130c03bdea7e3 Mon Sep 17 00:00:00 2001
From: Raul Tambre <raul@tambre.ee>
Date: Sat, 13 Jun 2020 11:26:11 +0300
Subject: Clang: Record Clang 6.0+ as fully supporting C++17

---
 Modules/Compiler/Clang.cmake | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Modules/Compiler/Clang.cmake b/Modules/Compiler/Clang.cmake
index b84bdb2..bb516d3 100644
--- a/Modules/Compiler/Clang.cmake
+++ b/Modules/Compiler/Clang.cmake
@@ -146,6 +146,10 @@ macro(__compiler_clang_cxx_standards lang)
       set(CMAKE_${lang}17_EXTENSION_COMPILE_OPTION "-std=gnu++1z")
     endif()
 
+    if(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 6.0)
+      set(CMAKE_${lang}17_STANDARD__HAS_FULL_SUPPORT ON)
+    endif()
+
     if(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 11.0)
       set(CMAKE_${lang}20_STANDARD_COMPILE_OPTION "-std=c++20")
       set(CMAKE_${lang}20_EXTENSION_COMPILE_OPTION "-std=gnu++20")
-- 
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