Fix #4: Use WASM

.gitignore

@@ -1,4 +1,4 @@
 root/
 
-python.asm.*
+pyodide.asm.*
 *.bc

Makefile

@@ -7,6 +7,7 @@ CXX=em++
 OPTFLAGS=-O2
 CXXFLAGS=-std=c++14 $(OPTFLAGS) -g -I $(CPYTHON_EMSCRIPTEN_ROOT)/installs/python-$(PYVERSION)/include/python$(PYMINOR)/ -Wno-warn-absolute-paths
 LDFLAGS=$(OPTFLAGS) $(CPYTHON_EMSCRIPTEN_ROOT)/installs/python-$(PYVERSION)/lib/libpython$(PYMINOR).a \
+  -s "BINARYEN_METHOD='native-wasm,interpret-binary,interpret-asm2wasm'" \
   -s TOTAL_MEMORY=268435456 \
   -s ASSERTIONS=2 \
   -s EMULATE_FUNCTION_POINTER_CASTS=1 \
@@ -14,27 +15,22 @@ LDFLAGS=$(OPTFLAGS) $(CPYTHON_EMSCRIPTEN_ROOT)/installs/python-$(PYVERSION)/lib/
   --memory-init-file 0
 
 
-all: python.asm.js
+all: pyodide.asm.html
 
 
-python.asm.js: main.bc root
-	$(CC) --bind -o $@ $(filter %.bc,$^) $(LDFLAGS) \
+pyodide.asm.html: main.bc root
+	$(CC) -s WASM=1 --bind -o $@ $(filter %.bc,$^) $(LDFLAGS) \
 		$(foreach d,$(wildcard root/*),--preload-file $d@/$(notdir $d))
 
 
-serve: python.asm.js
-	@echo "Serving on port 8062"
-	python -m SimpleHTTPServer 8062
-
-
 clean:
 	-rm -fr root
-	-rm python.asm.js python.asm.data python.asm.wasm
+	-rm pyodide.asm.*
 	-rm *.bc
 
 
 %.bc: %.cpp $(CPYTHON_EMSCRIPTEN_ROOT)/installs/python-$(PYVERSION)/lib/python$(PYMINOR)
-	$(CXX) -o $@ $< $(CXXFLAGS)
+	$(CXX) --bind -o $@ $< $(CXXFLAGS)
 
 
 root: $(CPYTHON_EMSCRIPTEN_ROOT)/installs/python-$(PYVERSION)/lib/python$(PYMINOR)

pyodide.js

@@ -0,0 +1,36 @@
+var Module = {}
+
+{
+    let wasmURL = 'pyodide.asm.wasm';
+    let wasmXHR = new XMLHttpRequest();
+    wasmXHR.open('GET', wasmURL, true);
+    wasmXHR.responseType = 'arraybuffer';
+    wasmXHR.onload = function() {
+        if (wasmXHR.status === 200 || wasmXHR.status === 0) {
+            Module.wasmBinary = wasmXHR.response;
+        } else {
+            var wasmURLBytes = tryParseAsDataURI(wasmURL);
+            if (wasmURLBytes) {
+                Module.wasmBinary = wasmURLBytes.buffer;
+            }
+        }
+
+        var memoryInitializer = 'pyodide.asm.html.mem';
+        if (typeof Module['locateFile'] === 'function') {
+            memoryInitializer = Module['locateFile'](memoryInitializer);
+        } else if (Module['memoryInitializerPrefixURL']) {
+            memoryInitializer = Module['memoryInitializerPrefixURL'] + memoryInitializer;
+        }
+        Module['memoryInitializerRequestURL'] = memoryInitializer;
+        var meminitXHR = Module['memoryInitializerRequest'] = new XMLHttpRequest();
+        meminitXHR.open('GET', memoryInitializer, true);
+        meminitXHR.responseType = 'arraybuffer';
+        meminitXHR.send(null);
+
+        var script = document.createElement('script');
+        script.src = "pyodide.asm.js";
+        document.body.appendChild(script);
+
+    };
+    wasmXHR.send(null);
+}