From 9f56678fceef0a53411bdfcac82ab65f7b896838 Mon Sep 17 00:00:00 2001
From: Pieter Wuille <pieter.wuille@gmail.com>
Date: Tue, 4 Sep 2012 23:01:03 +0200
Subject: [PATCH] Backport Win32 LevelDB env from C++0x to C++

Since the gitian mingw compiler doesn't support C++0x yet.
---
 src/leveldb/build_detect_platform | 2 +-
 src/leveldb/port/port_win.cc      | 4 ++--
 src/leveldb/port/port_win.h       | 2 +-
 src/leveldb/util/env_boost.cc     | 2 +-
 4 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/leveldb/build_detect_platform b/src/leveldb/build_detect_platform
index 385b5eff..dd982236 100755
--- a/src/leveldb/build_detect_platform
+++ b/src/leveldb/build_detect_platform
@@ -112,7 +112,7 @@ case "$TARGET_OS" in
     OS_WINDOWS_CROSSCOMPILE)
         PLATFORM=OS_WINDOWS
         COMMON_FLAGS="-fno-builtin-memcmp -D_REENTRANT -DOS_WINDOWS -DLEVELDB_PLATFORM_WINDOWS -DBOOST_THREAD_USE_LIB"
-        PLATFORM_CXXFLAGS="-std=c++0x"
+        PLATFORM_CXXFLAGS=""
         PLATFORM_LDFLAGS=""
         PLATFORM_SHARED_CFLAGS=""
         PLATFORM_SOURCES="port/port_win.cc util/env_boost.cc util/win_logger.cc"
diff --git a/src/leveldb/port/port_win.cc b/src/leveldb/port/port_win.cc
index 4ca64acb..786cd601 100644
--- a/src/leveldb/port/port_win.cc
+++ b/src/leveldb/port/port_win.cc
@@ -134,7 +134,7 @@ AtomicPointer::AtomicPointer(void* v) {
 }
 
 void* AtomicPointer::Acquire_Load() const {
-  void * p = nullptr;
+  void * p = NULL;
   InterlockedExchangePointer(&p, rep_);
   return p;
 }
@@ -160,7 +160,7 @@ enum InitializationState
 
 void InitOnce(OnceType* once, void (*initializer)()) {
 
-  static_assert(Uninitialized == LEVELDB_ONCE_INIT, "Invalid uninitialized state value");
+  assert(Uninitialized == LEVELDB_ONCE_INIT);
 
   InitializationState state = static_cast<InitializationState>(InterlockedCompareExchange(once, Running, Uninitialized));
 
diff --git a/src/leveldb/port/port_win.h b/src/leveldb/port/port_win.h
index b53d6ef7..89391999 100644
--- a/src/leveldb/port/port_win.h
+++ b/src/leveldb/port/port_win.h
@@ -104,7 +104,7 @@ class AtomicPointer {
  private:
   void * rep_;
  public:
-  AtomicPointer() : rep_(nullptr) { }
+  AtomicPointer() : rep_(NULL) { }
   explicit AtomicPointer(void* v); 
   void* Acquire_Load() const;
 
diff --git a/src/leveldb/util/env_boost.cc b/src/leveldb/util/env_boost.cc
index 0190f9fb..055c6574 100644
--- a/src/leveldb/util/env_boost.cc
+++ b/src/leveldb/util/env_boost.cc
@@ -401,7 +401,7 @@ class PosixEnv : public Env {
 
       boost::interprocess::file_lock fl(fname.c_str());
       BoostFileLock * my_lock = new BoostFileLock();
-      my_lock->fl_ = std::move(fl);
+      fl.swap(my_lock->fl_);
       if (!my_lock->fl_.try_lock()) {
           return Status::IOError("database already in use: could not acquire exclusive lock");
       }