From d116e27f0f6c89c887420890ffe61c6708ef5c08 Mon Sep 17 00:00:00 2001
From: Joost VandeVondele <Joost.VandeVondele@gmail.com>
Date: Fri, 15 May 2020 19:37:56 +0200
Subject: [PATCH 1/1] Workaround for older compiler

gcc < 5 doesn't fully support the c++11 `std::is_trivially_copyable<Entry>::value`
Remove it, as it is not essential.

fixes https://github.com/official-stockfish/Stockfish/issues/2681

closes https://github.com/official-stockfish/Stockfish/pull/2682

No functional change.
---
 src/syzygy/tbprobe.cpp | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src/syzygy/tbprobe.cpp b/src/syzygy/tbprobe.cpp
index 843f049a..adc45d58 100644
--- a/src/syzygy/tbprobe.cpp
+++ b/src/syzygy/tbprobe.cpp
@@ -414,7 +414,6 @@ class TBTables {
             return (TBTable<Type>*)(Type == WDL ? (void*)wdl : (void*)dtz);
         }
     };
-    static_assert(std::is_trivially_copyable<Entry>::value, "");
 
     static constexpr int Size = 1 << 12; // 4K table, indexed by key's 12 lsb
     static constexpr int Overflow = 1;  // Number of elements allowed to map to the last bucket
-- 
2.39.2