Only use MADV_RANDOM if defined

needed to compile on Haiku. fixes https://github.com/official-stockfish/Stockfish/issues/3093 closes https://github.com/official-stockfish/Stockfish/pull/3094 No functional change
2020-09-01 12:22:47 +02:00 · 2020-09-01 12:22:47 +02:00 · be87517734
parent a8bbaa1795
commit be87517734
1 changed files with 2 additions and 0 deletions
--- a/src/syzygy/tbprobe.cpp
+++ b/src/syzygy/tbprobe.cpp
@ -223,7 +223,9 @@ public:

        *mapping = statbuf.st_size;
        *baseAddress = mmap(nullptr, statbuf.st_size, PROT_READ, MAP_SHARED, fd, 0);
+#if defined(MADV_RANDOM)
        madvise(*baseAddress, statbuf.st_size, MADV_RANDOM);
+#endif
        ::close(fd);

        if (*baseAddress == MAP_FAILED)