From 52c28b869293c8639228ff32ec8f8615955fe39d Mon Sep 17 00:00:00 2001
From: Matthias Baesken <mbaesken@openjdk.org>
Date: Fri, 18 Sep 2020 14:06:29 +0000
Subject: [PATCH] 8253239: Disable VS warning C4307

Reviewed-by: mdoerr, erikj
---
 make/autoconf/flags-cflags.m4 | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/make/autoconf/flags-cflags.m4 b/make/autoconf/flags-cflags.m4
index 64f9883d52e..15df47434c0 100644
--- a/make/autoconf/flags-cflags.m4
+++ b/make/autoconf/flags-cflags.m4
@@ -134,6 +134,10 @@ AC_DEFUN([FLAGS_SETUP_WARNINGS],
 
       WARNINGS_ENABLE_ALL="-W3"
       DISABLED_WARNINGS="4800"
+      if test "x$TOOLCHAIN_VERSION" = x2017; then
+        # VS2017 incorrectly triggers this warning for constexpr
+        DISABLED_WARNINGS+=" 4307"
+      fi
       ;;
 
     gcc)