diff --git a/port/port.h b/port/port.h
index d3c5d6aa..dfbf6cd4 100644
--- a/port/port.h
+++ b/port/port.h
@@ -8,13 +8,8 @@
 #include <string.h>
 #include "leveldb/ldb_config.h"
 
-// Include the appropriate platform specific file below.  If you are
-// porting to a new platform, see "port_example.h" for documentation
-// of what the new port_<platform>.h file must provide.
-#if defined(LEVELDB_PLATFORM_POSIX)
-#  include "port/port_posix.h"
-#elif defined(LEVELDB_PLATFORM_CHROMIUM)
-#  include "port/port_chromium.h"
-#endif
+// there used to be more port_*.h, but everything seems to have become
+// posix-compliant by now
+#include "port/port_posix.h"
 
 #endif  // STORAGE_LEVELDB_PORT_PORT_H_
diff --git a/table/table_test.cc b/table/table_test.cc
index 4382c8e0..7b6e90f8 100644
--- a/table/table_test.cc
+++ b/table/table_test.cc
@@ -826,9 +826,9 @@ TEST(TableTest, ApproximateOffsetOfCompressed) {
   ASSERT_TRUE(Between(c.ApproximateOffsetOf("abc"),       0,      0));
   ASSERT_TRUE(Between(c.ApproximateOffsetOf("k01"),       0,      0));
   ASSERT_TRUE(Between(c.ApproximateOffsetOf("k02"),       0,      0));
-  ASSERT_TRUE(Between(c.ApproximateOffsetOf("k03"),    2000,   3000));
-  ASSERT_TRUE(Between(c.ApproximateOffsetOf("k04"),    2000,   3000));
-  ASSERT_TRUE(Between(c.ApproximateOffsetOf("xyz"),    4000,   6000));
+  ASSERT_TRUE(Between(c.ApproximateOffsetOf("k03"),    2000,   3500));
+  ASSERT_TRUE(Between(c.ApproximateOffsetOf("k04"),    2000,   3500));
+  ASSERT_TRUE(Between(c.ApproximateOffsetOf("xyz"),    4000,   6500));
 }
 
 }  // namespace leveldb
diff --git a/tools/sst_rewrite.cc b/tools/sst_rewrite.cc
index 49f23303..981c4e7f 100644
--- a/tools/sst_rewrite.cc
+++ b/tools/sst_rewrite.cc
@@ -223,8 +223,8 @@ main(
             {
                 leveldb::WritableFile * outfile;
                 leveldb::Status s;
-                std::auto_ptr<leveldb::Iterator> it;
-                std::auto_ptr<leveldb::TableBuilder> builder;
+                std::unique_ptr<leveldb::Iterator> it;
+                std::unique_ptr<leveldb::TableBuilder> builder;
 
                 LDbTable in_file(options, fname);
 
diff --git a/util/bloom.cc b/util/bloom.cc
index 1cb63d1c..a9d97bf7 100644
--- a/util/bloom.cc
+++ b/util/bloom.cc
@@ -97,7 +97,7 @@ const FilterPolicy* NewBloomFilterPolicy(int bits_per_key) {
 // container to hold one bloom filter and auto destruct
 struct BloomInventoryItem
 {
-    std::auto_ptr<const FilterPolicy> m_Item;
+    std::unique_ptr<const FilterPolicy> m_Item;
 
     BloomInventoryItem()
     {
diff --git a/util/bloom2.cc b/util/bloom2.cc
index 5ffb2840..1d5f4030 100644
--- a/util/bloom2.cc
+++ b/util/bloom2.cc
@@ -111,7 +111,7 @@ const FilterPolicy* NewBloomFilterPolicy2(int bits_per_key) {
 // container to hold one bloom filter and auto destruct
 struct BloomInventoryItem2
 {
-    std::auto_ptr<const FilterPolicy> m_Item;
+    std::unique_ptr<const FilterPolicy> m_Item;
 
     BloomInventoryItem2()
     {
diff --git a/util/expiry_os_test.cc b/util/expiry_os_test.cc
index 66c9a65a..d42e748b 100644
--- a/util/expiry_os_test.cc
+++ b/util/expiry_os_test.cc
@@ -1451,7 +1451,7 @@ TEST(ExpiryDBTester, Simple)
     Status s;
     sExpiryDBObject * cursor;
     std::string buffer;
-    std::auto_ptr<leveldb::Iterator> iterator;
+    std::unique_ptr<leveldb::Iterator> iterator;
 
     // enable compaction expiry
     m_Expiry->expiry_enabled=true;
diff --git a/util/perf_count.cc b/util/perf_count.cc
index ac6aaa28..73419405 100644
--- a/util/perf_count.cc
+++ b/util/perf_count.cc
@@ -353,20 +353,8 @@ PerformanceCounters * gPerfCounters(&LocalStartupCounters);
 
             val_ptr=&m_Counter[Index];
 
-# if ULONG_MAX != 4294967295UL
             inc_and_fetch(val_ptr);
-#else
-            // hack fest for 64 bit semi-atomic on 32bit machine
-            uint32_t ret_32, * ptr_32;
 
-            ptr_32=(uint32_t *)&val_ptr;
-            ret_32=inc_and_fetch(ptr_32, 1);
-            if (0==ret_32)
-            {
-                ++ptr_32;
-                inc_and_fetch(ptr_32, 1);
-            }   // if
-#endif
             ret_val=*val_ptr;
         }   // if
 
@@ -388,20 +376,8 @@ PerformanceCounters * gPerfCounters(&LocalStartupCounters);
 
             val_ptr=&m_Counter[Index];
 
-# if ULONG_MAX != 4294967295UL
             dec_and_fetch(val_ptr);
-#else
-            // hack fest for 64 bit semi-atomic on 32bit machine
-            uint32_t ret_32, * ptr_32;
 
-            ptr_32=(uint32_t *)&val_ptr;
-            ret_32=dec_and_fetch(ptr_32);
-            if (0xFFFFFFFF==ret_32)
-            {
-                ++ptr_32;
-                dec_and_fetch(ptr_32);
-            }   // if
-#endif
             ret_val=*val_ptr;
         }   // if
 
@@ -424,23 +400,7 @@ PerformanceCounters * gPerfCounters(&LocalStartupCounters);
 
             val_ptr=&m_Counter[Index];
 
-# if ULONG_MAX != 4294967295UL
             ret_val=add_and_fetch(val_ptr, Amount);
-#else
-            // hack fest for 64 bit semi-atomic on 32bit machine
-            uint32_t old_32, ret_32, * ptr_32;
-
-            ptr_32=(uint32_t *)&val_ptr;
-            old_32=*ptr_32;
-            ret_32=add_and_fetch(ptr_32, Amount);
-            if (ret_32<old_32)
-            {
-                ++ptr_32;
-                add_and_fetch(ptr_32, 1);
-            }   // if
-
-            ret_val=*val_ptr;
-#endif
         }   // if
 
         return(ret_val);