text: /*
   emcc sample.c \
   -s "EXPORTED_FUNCTIONS=['_add','call_import_from_outside_environment']" \
   -s ERROR_ON_UNDEFINED_SYMBOLS=0 \
   -O3 \
   -o sample.wasm
  */
  
  int add(int a, int b) {
    return a + b;
  }
  
  extern int import_from_outside_environment(int);
  
  void call_import_from_outside_environment() {
    import_from_outside_environment(1);
  }
  