From 4a3c4edb59b6881a30056531bc71e52295ab1cb0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Konstantin=20K=C3=A4fer?= <mail@kkaefer.com>
Date: Thu, 21 Jun 2018 14:44:00 +0200
Subject: [android] add support for gnustl

---
 include/mbgl/math/log2.hpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'include')

diff --git a/include/mbgl/math/log2.hpp b/include/mbgl/math/log2.hpp
index 3136ac22b4..4f5fde60d1 100644
--- a/include/mbgl/math/log2.hpp
+++ b/include/mbgl/math/log2.hpp
@@ -15,6 +15,17 @@ namespace util {
 // (== number of bits required to store x)
 uint32_t ceil_log2(uint64_t x);
 
+template <typename T>
+T log2(T x) {
+// log2() is producing wrong results on ARMv5 binaries
+// running on ARMv7+ CPUs.
+#if defined(__ANDROID__)
+    return ::log(x) / M_LN2;
+#else
+    return ::log2(x);
+#endif
+}
+
 } // namespace util
 } // namespace mbgl
 
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