Isolated emscripten in new lib

lib/emscripten/emtests/test_inlinejs3.c

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2016 The Emscripten Authors.  All rights reserved.
+ * Emscripten is available under two separate licenses, the MIT license and the
+ * University of Illinois/NCSA Open Source License.  Both these licenses can be
+ * found in the LICENSE file.
+ */
+
+#include <stdio.h>
+#include <emscripten.h>
+
+void loop_iter() {
+  EM_ASM(out('loop iter!'));
+}
+
+int main(int argc, char **argv) {
+  EM_ASM(out('hello dere1'));
+  EM_ASM("out('hello dere2');");
+  emscripten_debugger(); // does nothing in shells; check for validation error though
+  for (int i = 0; i < 3; i++) {
+    EM_ASM(out('hello dere3'); out('hello dere' + 4););
+  }
+  EM_ASM_({ out('hello input ' + $0) }, 123);
+  EM_ASM_ARGS({ out('hello input ' + $0) }, 456);
+  int sum = 0;
+  for (int i = 0; i < argc * 3; i++) {
+    sum += EM_ASM_INT({
+                        out('i: ' + [ $0, ($1).toFixed(2) ]);
+                        return $0 * 2;
+                      },
+                      i, double(i) / 12);
+  }
+  EM_ASM_INT({ globalVar = $0 }, sum); // no outputs, just input
+  sum = 0;
+  sum = EM_ASM_INT(return globalVar); // no inputs, just output
+  printf("sum: %d\n", sum);
+  printf("|%.2f|\n", EM_ASM_DOUBLE({
+    return $0; // return double properly
+  }, 1.2));
+  for (int i = 0; i < argc*2; i++) loop_iter();
+  return 0;
+}