Makefile integration of LevelDB

bitcoin-qt.pro

@@ -90,6 +90,29 @@ contains(BITCOIN_NEED_QT_PLUGINS, 1) {
     QTPLUGIN += qcncodecs qjpcodecs qtwcodecs qkrcodecs qtaccessiblewidgets
 }
 
+contains(USE_LEVELDB, -) {
+    message(Building without LevelDB)
+} else {
+    message(Building with LevelDB)
+    DEFINES += USE_LEVELDB
+    INCLUDEPATH += src/leveldb/include src/leveldb/helpers
+    LIBS += $$PWD/src/leveldb/libleveldb.a $$PWD/src/leveldb/libmemenv.a
+    !windows {
+        genleveldb.commands = cd $$PWD/src/leveldb ; $(MAKE) libleveldb.a libmemenv.a
+    } else {
+        # make an educated guess about what the ranlib command is called
+        isEmpty(QMAKE_RANLIB) {
+            QMAKE_RANLIB = $$replace(QMAKE_STRIP, strip, ranlib)
+        }
+        genleveldb.commands = cd $$PWD/src/leveldb ; CC=$$QMAKE_CC CXX=$$QMAKE_CXX TARGET_OS=OS_WINDOWS_CROSSCOMPILE CXXFLAGS="-I$$BOOST_INCLUDE_PATH" LDFLAGS="-L$$BOOST_LIB_PATH" $(MAKE) libleveldb.a libmemenv.a ; $$QMAKE_RANLIB $$PWD/src/leveldb/libleveldb.a ; $$QMAKE_RANLIB $$PWD/src/leveldb/libmemenv.a
+    }
+    genleveldb.target = $$PWD/src/leveldb/libleveldb.a
+    genleveldb.depends = FORCE
+    PRE_TARGETDEPS += $$PWD/src/leveldb/libleveldb.a
+    QMAKE_EXTRA_TARGETS += genleveldb
+    # Gross ugly hack that depends on qmake internals, unfortunately there's no other way to do it.
+    QMAKE_CLEAN += $$PWD/src/leveldb/libleveldb.a; cd $$PWD/src/leveldb ; $(MAKE) clean
+}
 
 # regenerate src/build.h
 !windows|contains(USE_BUILD_INFO, 1) {