From 95169097fc44184f1decdab4c7caf05b4612597a Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Mon, 15 Jun 2020 23:39:35 +0900
Subject: Add `/std:c++latest` option to VC `CXX_ABI` build.

---
 target/appveyor.rb | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/target/appveyor.rb b/target/appveyor.rb
index 25745daa8..f866f1ead 100644
--- a/target/appveyor.rb
+++ b/target/appveyor.rb
@@ -33,6 +33,8 @@ MRuby::Build.new('cxx_abi') do |conf|
   toolchain :visualcpp
 
   conf.gembox 'full-core'
+  # C compiler settings
+  conf.cc.flags << "/std:c++latest"
   conf.compilers.each do |c|
     c.defines += %w(MRB_GC_FIXED_ARENA)
   end
-- 
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