vbanext 64 bit build

vbanext/mingw/Makefile

@@ -1,7 +1,22 @@
 CXX = g++
-CXXFLAGS = -Wall -O3 -fpermissive -Wno-unused-but-set-variable -Wno-strict-aliasing -Wzero-as-null-pointer-constant -Wno-unused-variable -Wno-parentheses -Wno-sign-compare -std=gnu++11 -fomit-frame-pointer -fno-exceptions
+CXXFLAGS = -Wall -O3 -fpermissive -Wno-unused-but-set-variable \
+	-Wno-strict-aliasing -Wzero-as-null-pointer-constant -Wno-unused-variable \
+	-Wno-parentheses -Wno-sign-compare -std=gnu++11 -fomit-frame-pointer -fno-exceptions
+
+MACHINE = $(shell $(CXX) -dumpmachine)
+ifneq (,$(findstring i686,$(MACHINE)))
+	ARCH = 32
+else ifneq (,$(findstring x86_64,$(MACHINE)))
+	ARCH = 64
+else
+	$(error Unknown arch)
+endif
+
+LDFLAGS_32 = -static-libgcc -static-libstdc++
+LDFLAGS_64 =
+LDFLAGS = -shared $(LDFLAGS_$(ARCH)) $(CXXFLAGS)
+
 TARGET = libvbanext.dll
-LDFLAGS = -shared -static-libgcc -static-libstdc++ $(CXXFLAGS)
 RM = rm
 CP = cp
 
@@ -10,6 +25,8 @@ SRCS = \
 	../newstate.cpp
 
 OBJS = $(SRCS:.cpp=.o)
+DEST_32 = ../../output/dll
+DEST_64 = ../../output64/dll
 
 all: $(TARGET)
 
@@ -24,4 +41,4 @@ clean:
 	$(RM) $(TARGET)
 	
 install:
-	$(CP) $(TARGET) ../../output/dll
+	$(CP) $(TARGET) $(DEST_$(ARCH))