From f5689178ad28bfb6e1e09f8151fb131de2d44dfe Mon Sep 17 00:00:00 2001
From: tiancaishaonvjituizi <452565578@qq.com>
Date: Fri, 6 May 2022 13:05:54 +0800
Subject: [PATCH] fix false positive warning of gcc>=9 (#42265)

* fix false positive warning in gcc>=9

* use more aggressive way

* Add comments
---
 paddle/utils/variant.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/paddle/utils/variant.h b/paddle/utils/variant.h
index a7546d094c2..50bdc4287e2 100644
--- a/paddle/utils/variant.h
+++ b/paddle/utils/variant.h
@@ -13,6 +13,15 @@
 
 #pragma once
 
+// gcc >= 9 has a bug that creates a false positive warning.
+// Reference:
+// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92145
+// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89381
+#if defined(__GNUC__) && !defined(__clang__) && __GNUC__ >= 9
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wdeprecated-copy"
+#endif
+
 /*
    variant synopsis
 
@@ -2828,3 +2837,7 @@ struct hash<paddle::monostate> {
 };
 
 }  // namespace std
+
+#if defined(__GNUC__) && !defined(__clang__) && __GNUC__ >= 9
+#pragma GCC diagnostic pop
+#endif
-- 
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