From dc46672d55e8ef06e1479fc7a8b8513d76f61fef Mon Sep 17 00:00:00 2001
From: Stefan Krah <skrah@bytereef.org>
Date: Fri, 18 Aug 2017 21:20:18 +0200
Subject: [PATCH] bpo-30923: Disable warning that has been part of -Wextra
 since gcc-7.0.

---
 Modules/_decimal/libmpdec/io.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Modules/_decimal/libmpdec/io.c b/Modules/_decimal/libmpdec/io.c
index 3aadfb0437979c..f45e558f1a9573 100644
--- a/Modules/_decimal/libmpdec/io.c
+++ b/Modules/_decimal/libmpdec/io.c
@@ -45,6 +45,12 @@
    PEP-3101 formatting for numeric types. */
 
 
+/* Disable warning that is part of -Wextra since gcc 7.0. */
+#if defined(__GNUC__) && !defined(__INTEL_COMPILER) && __GNUC__ >= 7
+  #pragma GCC diagnostic ignored "-Wimplicit-fallthrough"
+#endif
+
+
 /*
  * Work around the behavior of tolower() and strcasecmp() in certain
  * locales. For example, in tr_TR.utf8: