From ba0a3d92f4ef6b14b76e859a43487adc8321d263 Mon Sep 17 00:00:00 2001
From: Hieu Hoang <hieuhoang@gmail.com>
Date: Sun, 10 Apr 2016 16:25:17 +0400
Subject: compile error on old linux machines (Redhat 6.2)

---
 util/mmap.cc | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'util')

diff --git a/util/mmap.cc b/util/mmap.cc
index d89f3f600..cdf92c731 100644
--- a/util/mmap.cc
+++ b/util/mmap.cc
@@ -173,8 +173,10 @@ bool TryHuge(std::size_t size, uint8_t alignment_bits, bool populate, util::scop
   // Second try: manually configured hugetlb pages exist, but kernel too old to
   // pick size or not available.  This might pick the wrong size huge pages,
   // but the sysadmin must have made them available in the first place.
+#ifdef MAP_HUGETLB
   if (AnonymousMap(size, MAP_HUGETLB, populate, to))
     return true;
+#endif
 
   // Third try: align to a multiple of the huge page size by overallocating.
   // I feel bad about doing this, but it's also how posix_memalign is
-- 
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