diff --git a/scripts/config-vs-debug-x64.mk b/scripts/config-vs-debug-x64.mk
new file mode 100644
index 000000000..968fb03cf
--- /dev/null
+++ b/scripts/config-vs-debug-x64.mk
@@ -0,0 +1,20 @@
+CXX="$(VSINSTALLDIR)VC\Bin\x86_amd64\cl"
+CXXFLAGS=/c /ZI /nologo /W3 /WX- /Od /Oy- /D WIN32 /D _AMD64_ /D _DEBUG /D Z3DEBUG /D _CONSOLE /D _TRACE /D _WINDOWS /Gm /EHsc /RTC1 /MDd /GS /fp:precise /Zc:wchar_t /Zc:forScope /openmp /Gd /analyze- 
+CXX_OUT_FLAG=/Fo
+OBJ_EXT=.obj
+LIB_EXT=.lib
+AR=lib
+AR_FLAGS=/nologo
+AR_OUTFLAG=/OUT:
+EXE_EXT=.exe
+LINK="$(VSINSTALLDIR)VC\Bin\x86_amd64\cl"
+LINK_FLAGS=/nologo /MDd
+LINK_EXTRA_FLAGS=/link /DEBUG /MACHINE:X64 /SUBSYSTEM:CONSOLE /INCREMENTAL:NO /STACK:8388608 /OPT:REF /OPT:ICF /TLBID:1 /DYNAMICBASE /NXCOMPAT
+LINK_OUT_FLAG=/Fe
+
+SO_EXT=.dll
+SLINK="$(VSINSTALLDIR)VC\Bin\x86_amd64\cl"
+SLINK_FLAGS=/nologo /LDd
+SLINK_EXTRA_FLAGS=/link /DEBUG /MACHINE:X64 /SUBSYSTEM:WINDOWS /INCREMENTAL:NO /STACK:8388608 /OPT:REF /OPT:ICF /TLBID:1 /DYNAMICBASE:NO
+SLINK_OUT_FLAG=/Fe
+
diff --git a/scripts/config-vs-release-x64.mk b/scripts/config-vs-release-x64.mk
new file mode 100644
index 000000000..b1e856b18
--- /dev/null
+++ b/scripts/config-vs-release-x64.mk
@@ -0,0 +1,20 @@
+CXX="$(VSINSTALLDIR)VC\Bin\x86_amd64\cl"
+CXXFLAGS=/c /Zi /nologo /W3 /WX- /O2 /D WIN32 /D NDEBUG /D _LIB /D _WINDOWS /D _AMD64_ /D _UNICODE /D UNICODE /Gm- /EHsc /MD /GS /fp:precise /Zc:wchar_t /Zc:forScope /Gd /TP
+CXX_OUT_FLAG=/Fo
+OBJ_EXT=.obj
+LIB_EXT=.lib
+AR=lib
+AR_FLAGS=/nologo
+AR_OUTFLAG=/OUT:
+EXE_EXT=.exe
+LINK="$(VSINSTALLDIR)VC\Bin\x86_amd64\cl"
+LINK_FLAGS=/nologo /MD
+LINK_EXTRA_FLAGS=/link /MACHINE:X64 /SUBSYSTEM:CONSOLE /INCREMENTAL:NO /STACK:8388608 
+LINK_OUT_FLAG=/Fe
+
+SO_EXT=.dll
+SLINK="$(VSINSTALLDIR)VC\Bin\x86_amd64\cl"
+SLINK_FLAGS=/nologo /LD
+SLINK_EXTRA_FLAGS=/link /MACHINE:X64 /SUBSYSTEM:WINDOWS /INCREMENTAL:NO /STACK:8388608 
+SLINK_OUT_FLAG=/Fe
+
diff --git a/scripts/config-vs-release.mk b/scripts/config-vs-release.mk
index 89a4c0520..72bc9bb98 100644
--- a/scripts/config-vs-release.mk
+++ b/scripts/config-vs-release.mk
@@ -1,5 +1,5 @@
 CXX=cl
-CXXFLAGS=/nologo /c /W3 /WX- /O2 /Oy- /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_WINDOWS" /D "ASYNC_COMMANDS" /Gm- /EHsc /GS /fp:precise /Zc:wchar_t /Zc:forScope /openmp /Gd /analyze-
+CXXFLAGS=/nologo /c /W3 /WX- /O2 /Oy- /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_WINDOWS" /D "ASYNC_COMMANDS" /Gm- /EHsc /GS /fp:precise /Zc:wchar_t /Zc:forScope /openmp /Gd /analyze- /arch:SSE2
 CXX_OUT_FLAG=/Fo
 OBJ_EXT=.obj
 LIB_EXT=.lib
@@ -18,3 +18,5 @@ SLINK_FLAGS=/nologo /LD
 SLINK_EXTRA_FLAGS=/link /MACHINE:X86 /SUBSYSTEM:WINDOWS /INCREMENTAL:NO /STACK:"8388608" /OPT:REF /OPT:ICF /TLBID:1 /DYNAMICBASE:NO
 SLINK_OUT_FLAG=/Fe
 
+
+
diff --git a/scripts/mk_util.py b/scripts/mk_util.py
index 582f1ae53..099b7f38e 100644
--- a/scripts/mk_util.py
+++ b/scripts/mk_util.py
@@ -41,17 +41,19 @@ def display_help():
     print "  -d, --debug                   compile Z3 in debug mode."
     print "  -x, --x64                     create 64 binary when using Visual Studio."
     print "  -m, --makefiles               generate only makefiles."
+    print "  -c, --showcpp                 display file .cpp file names before invoking compiler."
     exit(0)
 
 # Parse configuration option for mk_make script
 def parse_options():
-    global VERBOSE, DEBUG_MODE, IS_WINDOW, VS_X64, ONLY_MAKEFILES
-    options, remainder = getopt.gnu_getopt(sys.argv[1:], 'b:dvxhm', ['build=', 
-                                                                    'debug',
-                                                                    'verbose',
-                                                                    'x64',
-                                                                    'help',
-                                                                    'makefiles'
+    global VERBOSE, DEBUG_MODE, IS_WINDOW, VS_X64, ONLY_MAKEFILES, SHOW_CPPS
+    options, remainder = getopt.gnu_getopt(sys.argv[1:], 'b:dvxhmc', ['build=', 
+                                                                      'debug',
+                                                                      'verbose',
+                                                                      'x64',
+                                                                      'help',
+                                                                      'makefiles',
+                                                                      'showcpp'
                                                                      ])
     for opt, arg in options:
         if opt in ('-b', '--build'):
@@ -70,6 +72,8 @@ def parse_options():
             display_help()
         elif opt in ('-m', '--onlymakefiles'):
             ONLY_MAKEFILES = True
+        elif opt in ('-c', '--showcpp'):
+            SHOW_CPPS = True
         else:
             raise MKException("Invalid command line option '%s'" % opt)
 
@@ -435,8 +439,10 @@ def add_dot_net_dll(name, deps=[], path=None, dll_name=None, assembly_info_dir=N
 def cp_config_mk():
     if IS_WINDOW:
         if VS_X64:
-            # TODO
-            return
+            if DEBUG_MODE:
+                shutil.copyfile('scripts/config-vs-debug-x64.mk', '%s/config.mk' % BUILD_DIR)
+            else:
+                shutil.copyfile('scripts/config-vs-release-x64.mk', '%s/config.mk' % BUILD_DIR)
         else:
             if DEBUG_MODE:
                 shutil.copyfile('scripts/config-vs-debug.mk', '%s/config.mk' % BUILD_DIR)
@@ -474,6 +480,10 @@ def mk_makefile():
         else:
             print "  compilation mode: Release"
         if IS_WINDOW:
+            if VS_X64:
+                print "  platform: x64"
+            else:
+                print "  platform: x86"
             print "Type 'cd %s && nmake to build Z3" % BUILD_DIR
         else:
             print "Type 'cd %s; make' to build Z3" % BUILD_DIR
diff --git a/src/shell/datalog_frontend.cpp b/src/shell/datalog_frontend.cpp
index 2408f595f..14dcc91c3 100644
--- a/src/shell/datalog_frontend.cpp
+++ b/src/shell/datalog_frontend.cpp
@@ -17,7 +17,6 @@ Revision History:
 
 --*/
 
-
 #include<iostream>
 #include<time.h>
 #include<signal.h>