From d064ab8d0a1e00ddfe81d4c9db0868f7d375f61e Mon Sep 17 00:00:00 2001
From: Ruslan Baratov <ruslan_baratov@yahoo.com>
Date: Thu, 19 Apr 2018 08:59:47 +0300
Subject: [PATCH] Fix build for Android API < 21

---
 src/logging.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/logging.cc b/src/logging.cc
index 397e1061f..844a17934 100644
--- a/src/logging.cc
+++ b/src/logging.cc
@@ -1124,8 +1124,13 @@ void LogFileObject::Write(bool force_flush,
       uint32 this_drop_length = total_drop_length - dropped_mem_length_;
       if (this_drop_length >= (2 << 20)) {
         // Only advise when >= 2MiB to drop
+# if defined(__ANDROID__) && defined(__ANDROID_API__) && (__ANDROID_API__ < 21)
+        // 'posix_fadvise' introduced in API 21:
+        // * https://android.googlesource.com/platform/bionic/+/6880f936173081297be0dc12f687d341b86a4cfa/libc/libc.map.txt#732
+# else
         posix_fadvise(fileno(file_), dropped_mem_length_, this_drop_length,
                       POSIX_FADV_DONTNEED);
+# endif
         dropped_mem_length_ = total_drop_length;
       }
     }