From 8ca936aea644c91b5ed913fb5eb036627748bd1f Mon Sep 17 00:00:00 2001
From: David Adam <zanchey@ucc.gu.uwa.edu.au>
Date: Mon, 23 Dec 2019 22:18:51 +0800
Subject: [PATCH] cmake: use C++ extension options when checking features

This matches the CMake default of extensions turned on.
---
 cmake/ConfigureChecks.cmake | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cmake/ConfigureChecks.cmake b/cmake/ConfigureChecks.cmake
index 665fd5935..5f09ee1b5 100644
--- a/cmake/ConfigureChecks.cmake
+++ b/cmake/ConfigureChecks.cmake
@@ -183,7 +183,7 @@ CMAKE_POP_CHECK_STATE()
 # standards flag.
 # Also see https://github.com/fish-shell/fish-shell/issues/5865
 IF(NOT POLICY CMP0067)
-  LIST(APPEND CMAKE_REQUIRED_FLAGS "${CMAKE_CXX${CMAKE_CXX_STANDARD}_STANDARD_COMPILE_OPTION}")
+  LIST(APPEND CMAKE_REQUIRED_FLAGS "${CMAKE_CXX${CMAKE_CXX_EXTENSION}_STANDARD_COMPILE_OPTION}")
 ENDIF()
 
 CHECK_CXX_SOURCE_COMPILES("