From e1adddc74e22f93cc30d3d6043ab03d797ead80c Mon Sep 17 00:00:00 2001
From: Raul Tambre <raul@tambre.ee>
Date: Sat, 25 Jun 2022 10:08:44 +0300
Subject: RunCMake/CXXModules/NoCXX20: Force older standard

Compile features ensure a compiler is aware of a standard version, but the one
actually used may be newer. The test relies on the standard chosen being
pre-C++20, so force C++17 explicitly.

This was exposed by a nightly bot that has a compiler defaulting to C++23. The
test would've broken anyway in a few years once GCC or Clang upped their
default.
---
 Tests/RunCMake/CXXModules/NoCXX20.cmake | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/Tests/RunCMake/CXXModules/NoCXX20.cmake b/Tests/RunCMake/CXXModules/NoCXX20.cmake
index d502f7c..b7372e8 100644
--- a/Tests/RunCMake/CXXModules/NoCXX20.cmake
+++ b/Tests/RunCMake/CXXModules/NoCXX20.cmake
@@ -5,6 +5,7 @@ target_sources(nocxx20
   PUBLIC
     FILE_SET fs TYPE CXX_MODULES FILES
       sources/module.cxx)
-target_compile_features(nocxx20
-  PRIVATE
-    cxx_std_17)
+set_target_properties(nocxx20
+  PROPERTIES
+  CXX_STANDARD 17
+  CXX_STANDARD_REQUIRED ON)
-- 
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