From: Joost VandeVondele <Joost.VandeVondele@gmail.com>
Date: Fri, 15 May 2020 17:37:56 +0000 (+0200)
Subject: Workaround for older compiler
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=d116e27f0f6c89c887420890ffe61c6708ef5c08

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.
---

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