Added crosscompiling for linux-windows; Added makefile

Makefile

@@ -0,0 +1,48 @@
+
+GODOT_BIN_PATH = ../godot_fork/bin/godot.x11.tools.64.llvm
+HEADERS = ../godot_headers
+TARGET = debug
+NAME = godot-cpp
+
+BASE = scons n=$(NAME) generate_bindings=yes target=$(TARGET) headers=$(HEADERS) godotbinpath=godot -j4
+LINUX = $(BASE) p=linux
+WINDOWS = $(BASE) p=windows
+OSX = $(BASE) p=osx
+
+
+all:
+	make linux
+	make windows
+
+
+linux:
+	make linux32
+	make linux64
+
+linux32: SConstruct
+	$(LINUX) a=32
+
+linux64: SConstruct
+	$(LINUX) a=64
+
+
+windows:
+	make windows32
+	make windows64
+
+windows32: SConstruct
+	$(WINDOWS) a=32
+
+windows64: SConstruct
+	$(WINDOWS) a=64
+
+
+osx:
+	make osx32
+	make osx64
+
+osx32: SConstruct
+	$(OSX) a=32
+
+osx64: SConstruct
+	$(OSX) a=64