X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fbitboard.h;h=b962226bfb9e5048f950a2dd954622e48db28f7d;hb=c2511243b40964e5ed5f35447baf5663a72da72a;hp=7f0fdb5a86a3029bd2f677b9f772a591ce79c3aa;hpb=a617b038759f6abd1b33f71ef6d1938fa3588c3d;p=stockfish

diff --git a/src/bitboard.h b/src/bitboard.h
index 7f0fdb5a..b962226b 100644
--- a/src/bitboard.h
+++ b/src/bitboard.h
@@ -43,12 +43,12 @@ const Bitboard Rank6BB = Rank1BB << (8 * 5);
 const Bitboard Rank7BB = Rank1BB << (8 * 6);
 const Bitboard Rank8BB = Rank1BB << (8 * 7);
 
-extern Bitboard SquaresByColorBB[2];
-extern Bitboard FileBB[8];
-extern Bitboard NeighboringFilesBB[8];
-extern Bitboard ThisAndNeighboringFilesBB[8];
-extern Bitboard RankBB[8];
-extern Bitboard InFrontBB[2][8];
+extern const Bitboard SquaresByColorBB[2];
+extern const Bitboard FileBB[8];
+extern const Bitboard NeighboringFilesBB[8];
+extern const Bitboard ThisAndNeighboringFilesBB[8];
+extern const Bitboard RankBB[8];
+extern const Bitboard InFrontBB[2][8];
 
 extern Bitboard SetMaskBB[65];
 extern Bitboard ClearMaskBB[65];