+diff -Naur dogecoin-0.8.5.3-rc3.orig/bitcoin-qt.pro dogecoin-0.8.5.3-rc3/bitcoin-qt.pro
+--- dogecoin-0.8.5.3-rc3.orig/bitcoin-qt.pro 2013-11-28 21:17:05.000000000 -0500
++++ dogecoin-0.8.5.3-rc3/bitcoin-qt.pro 2013-11-29 14:53:00.960537685 -0500
+@@ -5,7 +5,7 @@
+ INCLUDEPATH += src src/json src/qt
+ QT += core gui network
+ greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+-DEFINES += QT_GUI BOOST_THREAD_USE_LIB BOOST_SPIRIT_THREADSAFE
++DEFINES += QT_GUI BOOST_THREAD_USE_LIB BOOST_SPIRIT_THREADSAFE LEVELDB_WITHOUT_MEMENV
+ CONFIG += no_include_pwd
+ CONFIG += thread
+
+@@ -101,25 +101,30 @@
+ QTPLUGIN += qcncodecs qjpcodecs qtwcodecs qkrcodecs qtaccessiblewidgets
+ }
+
++contains(USE_SYSTEM_LEVELDB, 1) {
++ LIBS += -lleveldb
++} else {
+ INCLUDEPATH += src/leveldb/include src/leveldb/helpers
+-LIBS += $$PWD/src/leveldb/libleveldb.a $$PWD/src/leveldb/libmemenv.a
++LIBS += $$PWD/src/leveldb/libleveldb.a
+ !win32 {
+ # we use QMAKE_CXXFLAGS_RELEASE even without RELEASE=1 because we use RELEASE to indicate linking preferences not -O preferences
+- genleveldb.commands = cd $$PWD/src/leveldb && CC=$$QMAKE_CC CXX=$$QMAKE_CXX $(MAKE) OPT=\"$$QMAKE_CXXFLAGS $$QMAKE_CXXFLAGS_RELEASE\" libleveldb.a libmemenv.a
++ genleveldb.commands = cd $$PWD/src/leveldb && CC=$$QMAKE_CC CXX=$$QMAKE_CXX $(MAKE) OPT=\"$$QMAKE_CXXFLAGS $$QMAKE_CXXFLAGS_RELEASE\" libleveldb.a
+ } else {
+ # make an educated guess about what the ranlib command is called
+ isEmpty(QMAKE_RANLIB) {
+ QMAKE_RANLIB = $$replace(QMAKE_STRIP, strip, ranlib)
+ }
+ LIBS += -lshlwapi
+- genleveldb.commands = cd $$PWD/src/leveldb && CC=$$QMAKE_CC CXX=$$QMAKE_CXX TARGET_OS=OS_WINDOWS_CROSSCOMPILE $(MAKE) OPT=\"$$QMAKE_CXXFLAGS $$QMAKE_CXXFLAGS_RELEASE\" libleveldb.a libmemenv.a && $$QMAKE_RANLIB $$PWD/src/leveldb/libleveldb.a && $$QMAKE_RANLIB $$PWD/src/leveldb/libmemenv.a
++ genleveldb.commands = cd $$PWD/src/leveldb && CC=$$QMAKE_CC CXX=$$QMAKE_CXX TARGET_OS=OS_WINDOWS_CROSSCOMPILE $(MAKE) OPT=\"$$QMAKE_CXXFLAGS $$QMAKE_CXXFLAGS_RELEASE\" libleveldb.a && $$QMAKE_RANLIB $$PWD/src/leveldb/libleveldb.a
+ }
+ genleveldb.target = $$PWD/src/leveldb/libleveldb.a
+ genleveldb.depends = FORCE
+ PRE_TARGETDEPS += $$PWD/src/leveldb/libleveldb.a
+ QMAKE_EXTRA_TARGETS += genleveldb
++}
+ # Gross ugly hack that depends on qmake internals, unfortunately there is no other way to do it.
+-QMAKE_CLEAN += $$PWD/src/leveldb/libleveldb.a; cd $$PWD/src/leveldb ; $(MAKE) clean
++QMAKE_CLEAN += $$PWD/src/leveldb/libleveldb.a; cd $$PWD/src/leveldb && $(MAKE) clean || true
++
+
+ # regenerate src/build.h
+ !win32|contains(USE_BUILD_INFO, 1) {
+diff -Naur dogecoin-0.8.5.3-rc3.orig/src/leveldb.cpp dogecoin-0.8.5.3-rc3/src/leveldb.cpp
+--- dogecoin-0.8.5.3-rc3.orig/src/leveldb.cpp 2013-11-28 21:17:05.000000000 -0500
++++ dogecoin-0.8.5.3-rc3/src/leveldb.cpp 2013-11-29 14:55:33.760543008 -0500
+@@ -8,7 +8,9 @@
+ #include <leveldb/env.h>
+ #include <leveldb/cache.h>
+ #include <leveldb/filter_policy.h>
+-#include <memenv/memenv.h>
++#ifndef LEVELDB_WITHOUT_MEMENV
++#include <memenv.h>
++#endif
+
+ #include <boost/filesystem.hpp>
+
+@@ -43,8 +45,12 @@
+ options = GetOptions(nCacheSize);
+ options.create_if_missing = true;
+ if (fMemory) {
++#ifndef LEVELDB_WITHOUT_MEMENV
+ penv = leveldb::NewMemEnv(leveldb::Env::Default());
+ options.env = penv;
++#else
++ throw std::runtime_error("CLevelDB(): compiled without memenv support");
++#endif
+ } else {
+ if (fWipe) {
+ printf("Wiping LevelDB in %s\n", path.string().c_str());
+diff -Naur dogecoin-0.8.5.3-rc3.orig/src/makefile.unix dogecoin-0.8.5.3-rc3/src/makefile.unix
+--- dogecoin-0.8.5.3-rc3.orig/src/makefile.unix 2013-11-28 21:17:05.000000000 -0500
++++ dogecoin-0.8.5.3-rc3/src/makefile.unix 2013-11-29 15:08:58.337571033 -0500
+@@ -110,8 +110,7 @@
+ # adds some defaults in front. Unfortunately, LDFLAGS=... $(LDFLAGS) does not work.
+ xLDFLAGS=$(LDHARDENING) $(LDFLAGS)
+
+-OBJS= \
+- leveldb/libleveldb.a \
++BASEOBJS := \
+ obj/alert.o \
+ obj/version.o \
+ obj/checkpoints.o \
+@@ -120,7 +119,6 @@
+ obj/crypter.o \
+ obj/key.o \
+ obj/db.o \
+- obj/init.o \
+ obj/keystore.o \
+ obj/main.o \
+ obj/net.o \
+@@ -141,9 +139,17 @@
+ obj/hash.o \
+ obj/bloom.o \
+ obj/noui.o \
+- obj/leveldb.o \
+ obj/txdb.o
+
++OBJS := \
++ obj/leveldb.o \
++ obj/init.o \
++ $(BASEOBJS)
++
++TESTOBJS := \
++ obj-test/leveldb.o \
++ $(patsubst test/%.cpp,obj-test/%.o,$(wildcard test/*.cpp)) \
++ $(BASEOBJS)
+
+ ifdef USE_SSE2
+ DEFS += -DUSE_SSE2
+@@ -156,15 +162,25 @@
+ test check: test_dogecoin FORCE
+ ./test_dogecoin
+
++ifdef USE_SYSTEM_LEVELDB
++ LIBS += -lleveldb
++ TESTLIBS += -lmemenv
++else
+ #
+ # LevelDB support
+ #
+ MAKEOVERRIDES =
+-LIBS += $(CURDIR)/leveldb/libleveldb.a $(CURDIR)/leveldb/libmemenv.a
++LIBS += $(CURDIR)/leveldb/libleveldb.a
++TESTLIBS += $(CURDIR)/leveldb/libmemenv.a
+ DEFS += $(addprefix -I,$(CURDIR)/leveldb/include)
+ DEFS += $(addprefix -I,$(CURDIR)/leveldb/helpers)
+ leveldb/libleveldb.a:
+- @echo "Building LevelDB ..." && cd leveldb && $(MAKE) CC=$(CC) CXX=$(CXX) OPT="$(xCXXFLAGS)" libleveldb.a libmemenv.a && cd ..
++ @echo "Building LevelDB ..." && cd leveldb && $(MAKE) CC=$(CC) CXX=$(CXX) OPT="$(xCXXFLAGS)" libleveldb.a && cd ..
++leveldb/libmemenv.a:
++ @echo "Building LevelDB memenv ..." && cd leveldb && $(MAKE) CC=$(CC) CXX=$(CXX) OPT="$(xCXXFLAGS)" libmemenv.a && cd ..
++OBJS += leveldb/libleveldb.a
++TESTOBJS += leveldb/libmemenv.a
++endif
+
+ # auto-generated dependencies:
+ -include obj/*.P
+@@ -175,33 +191,34 @@
+ version.cpp: obj/build.h
+ DEFS += -DHAVE_BUILD_INFO
+
+-obj/%-sse2.o: %-sse2.cpp
+- $(CXX) -c $(xCXXFLAGS) -msse2 -MMD -MF $(@:%.o=%.d) -o $@ $<
++P_TO_D = \
+ @cp $(@:%.o=%.d) $(@:%.o=%.P); \
+- sed -e 's/#.*//' -e 's/^[^:]*: *//' -e 's/ *\\$$//' \
++ sed -e 's/\#.*//' -e 's/^[^:]*: *//' -e 's/ *\\$$//' \
+ -e '/^$$/ d' -e 's/$$/ :/' < $(@:%.o=%.d) >> $(@:%.o=%.P); \
+ rm -f $(@:%.o=%.d)
+
++obj/%-sse2.o: %-sse2.cpp
++ $(CXX) -c $(xCXXFLAGS) -msse2 -MMD -MF $(@:%.o=%.d) -o $@ $<
++ $(P_TO_D)
++
+ obj/%.o: %.cpp
+- $(CXX) -c $(xCXXFLAGS) -MMD -MF $(@:%.o=%.d) -o $@ $<
+- @cp $(@:%.o=%.d) $(@:%.o=%.P); \
+- sed -e 's/#.*//' -e 's/^[^:]*: *//' -e 's/ *\\$$//' \
+- -e '/^$$/ d' -e 's/$$/ :/' < $(@:%.o=%.d) >> $(@:%.o=%.P); \
+- rm -f $(@:%.o=%.d)
++ $(CXX) -c $(xCXXFLAGS) -DLEVELDB_WITHOUT_MEMENV -MMD -MF $(@:%.o=%.d) -o $@ $<
++ $(P_TO_D)
+
+-dogecoind: $(OBJS:obj/%=obj/%)
++dogecoind: $(OBJS)
+ $(LINK) $(xCXXFLAGS) -o $@ $^ $(xLDFLAGS) $(LIBS)
+
+-TESTOBJS := $(patsubst test/%.cpp,obj-test/%.o,$(wildcard test/*.cpp))
+-
+ obj-test/%.o: test/%.cpp
+ $(CXX) -c $(TESTDEFS) $(xCXXFLAGS) -MMD -MF $(@:%.o=%.d) -o $@ $<
+- @cp $(@:%.o=%.d) $(@:%.o=%.P); \
+- sed -e 's/#.*//' -e 's/^[^:]*: *//' -e 's/ *\\$$//' \
+- -e '/^$$/ d' -e 's/$$/ :/' < $(@:%.o=%.d) >> $(@:%.o=%.P); \
+- rm -f $(@:%.o=%.d)
++ $(P_TO_D)
++
++obj-test/leveldb.o: leveldb.cpp
++ $(CXX) -c $(TESTDEFS) $(xCXXFLAGS) -MMD -MF $(@:%.o=%.d) -o $@ $<
++ $(P_TO_D)
++
++TESTOBJS := $(patsubst test/%.cpp,obj-test/%.o,$(wildcard test/*.cpp))
+
+-test_dogecoin: $(TESTOBJS) $(filter-out obj/init.o,$(OBJS:obj/%=obj/%))
++test_dogecoin: $(TESTOBJS)
+ $(LINK) $(xCXXFLAGS) -o $@ $(LIBPATHS) $^ $(TESTLIBS) $(xLDFLAGS) $(LIBS)
+
+ clean: