Setup web examples to access cwrap and compile to JS.

examples/web/Makefile

@@ -8,16 +8,16 @@ CXX_native := g++
 OFLAGS_native_debug := -g -pedantic -DEMP_TRACK_MEM  -Wnon-virtual-dtor -Wcast-align -Woverloaded-virtual -Wconversion -Weffc++
 OFLAGS_native_opt := -O3 -DNDEBUG
 
-OFLAGS_web_debug := -g4 -pedantic -Wno-dollar-in-identifier-extension -s TOTAL_MEMORY=67108864 -s ASSERTIONS=2 -s DEMANGLE_SUPPORT=1 -Wnon-virtual-dtor -Wcast-align -Woverloaded-virtual -Wconversion -Weffc++
+OFLAGS_web_debug := -g4 -pedantic -Wno-dollar-in-identifier-extension -s TOTAL_MEMORY=67108864 -s ASSERTIONS=2 -s DEMANGLE_SUPPORT=1 -s WASM=0 -Wnon-virtual-dtor -Wcast-align -Woverloaded-virtual -Wconversion -Weffc++
  # -s SAFE_HEAP=1
-OFLAGS_web_opt := -Os -DNDEBUG -s TOTAL_MEMORY=67108864
+OFLAGS_web_opt := -Os -DNDEBUG -s TOTAL_MEMORY=67108864 -s WASM=0
 
 CFLAGS_native_debug := $(CFLAGS_all) $(OFLAGS_native_debug)
 CFLAGS_native_opt := $(CFLAGS_all) $(OFLAGS_native_opt)
 CFLAGS_native := $(CFLAGS_native_opt)
 
-CFLAGS_web_debug := $(CFLAGS_all) $(OFLAGS_web_debug) --js-library ../../source/web/library_emp.js -s EXPORTED_FUNCTIONS="['_main', '_empCppCallback']" -s NO_EXIT_RUNTIME=1
-CFLAGS_web_opt := $(CFLAGS_all) $(OFLAGS_web_opt) --js-library ../../source/web/library_emp.js -s EXPORTED_FUNCTIONS="['_main', '_empCppCallback']" -s NO_EXIT_RUNTIME=1
+CFLAGS_web_debug := $(CFLAGS_all) $(OFLAGS_web_debug) --js-library ../../source/web/library_emp.js -s EXPORTED_FUNCTIONS="['_main', '_empCppCallback']" -s EXTRA_EXPORTED_RUNTIME_METHODS='["ccall", "cwrap"]' -s NO_EXIT_RUNTIME=1
+CFLAGS_web_opt := $(CFLAGS_all) $(OFLAGS_web_opt) --js-library ../../source/web/library_emp.js -s EXPORTED_FUNCTIONS="['_main', '_empCppCallback']" -s EXTRA_EXPORTED_RUNTIME_METHODS='["ccall", "cwrap"]' -s NO_EXIT_RUNTIME=1
 
 
 JS_TARGETS := Animate.js Animate2.js Attributes.js Canvas.js Div.js DP.js Example.js Font.js Graph.js Image.js keypress.js Sudoku.js Table.js TextArea.js Tween.js Web.js