From 3b47e4ac3800bc499b7106d8e4bac727d4db0ae4 Mon Sep 17 00:00:00 2001
From: Oliver Hamlet <git@ortham.net>
Date: Tue, 1 Apr 2025 19:23:39 +0100
Subject: [PATCH] Set /Zc:__cplusplus when building on MSVC

This may trigger dependencies to use C++11/14/17 code paths.
---
 CMakeLists.txt    | 2 +-
 cmake/tests.cmake | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 36583e14..bf76c372 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -364,7 +364,7 @@ endif()
 
 if(MSVC)
     # Turn off permissive mode to be more standards-compliant and avoid compiler errors.
-    target_compile_options(loot PRIVATE "/permissive-" "/W4")
+    target_compile_options(loot PRIVATE "/Zc:__cplusplus" "/permissive-" "/W4")
 endif()
 
 ##############################
diff --git a/cmake/tests.cmake b/cmake/tests.cmake
index 985c898d..2584fe26 100644
--- a/cmake/tests.cmake
+++ b/cmake/tests.cmake
@@ -166,10 +166,11 @@ endif()
 
 if(MSVC)
     # Turn off permissive mode to be more standards-compliant and avoid compiler errors.
-    target_compile_options(libloot_tests PRIVATE "/permissive-" "/W4")
+    target_compile_options(libloot_tests PRIVATE "/Zc:__cplusplus" "/permissive-" "/W4")
 
     # Set /bigobj to allow building Debug and RelWithDebInfo tests
     target_compile_options(libloot_internals_tests PRIVATE
+        "/Zc:__cplusplus"
         "/permissive-"
         "/W4"
         "$<$<OR:$<CONFIG:DEBUG>,$<CONFIG:RelWithDebInfo>>:/bigobj>")