From 47b86b5d46dca571c5e841445c007cf1cd02b9ce Mon Sep 17 00:00:00 2001
From: Sebastian Pipping <sebastian@pipping.org>
Date: Tue, 19 Sep 2023 22:09:43 +0200
Subject: [PATCH] CMake: Require a C++11 compiler for the optional test suite

---
 expat/CMakeLists.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/expat/CMakeLists.txt b/expat/CMakeLists.txt
index d82d06d0..ee9d9b8c 100644
--- a/expat/CMakeLists.txt
+++ b/expat/CMakeLists.txt
@@ -167,6 +167,10 @@ endif()
 if(EXPAT_BUILD_TESTS)
     # We have to call enable_language() before modifying any CMAKE_CXX_* variables
     enable_language(CXX)
+
+    set(CMAKE_CXX_STANDARD 11)
+    set(CMAKE_CXX_STANDARD_REQUIRED ON)
+    set(CMAKE_CXX_EXTENSIONS OFF)  # i.e. -std=c++11 rather than default -std=gnu++11
 endif()
 
 #