add optional native wasm checking

1 files changed, 19 insertions, 1 deletions

diff --git a/check.py b/check.py
index 744042393..ff85449c7 100755
--- a/check.py
+++ b/check.py
@@ -146,7 +146,7 @@ if not interpreter:
 if not has_node:
   warn('no node found (did not check proper js form)')
 if not has_mozjs:
-  warn('no mozjs found (did not check asm.js validation)')
+  warn('no mozjs found (did not check native wasm support nor asm.js validation)')
 if not has_emcc:
   warn('no emcc found (did not check non-vanilla emscripten/binaryen integration)')
 if not has_vanilla_emcc:
@@ -566,6 +566,24 @@ if actual != expected:
 
 if has_emcc:
 
+  if has_mozjs:
+
+    print '\n[ checking native wasm support ]\n'
+
+    command = ['emcc', '-o', 'a.wasm.js', '-s', 'BINARYEN=1', os.path.join('test', 'hello_world.c'), '-s', 'BINARYEN_METHOD="native-wasm"', '-s', 'BINARYEN_SCRIPTS="spidermonkify.py"']
+    print ' '.join(command)
+    subprocess.check_call(command)
+
+    proc = subprocess.Popen(['mozjs', 'a.wasm.js'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    out, err = proc.communicate()
+    assert proc.returncode == 0, err
+    assert 'hello, world!' in out, out
+
+    proc = subprocess.Popen([has_node, 'a.wasm.js'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    out, err = proc.communicate()
+    assert proc.returncode != 0, 'should fail on no wasm support'
+    assert 'no native wasm support detected' in err, err
+
   print '\n[ checking wasm.js methods... ]\n'
 
   for method_init in [None, 'asm2wasm', 'wasm-s-parser', 'just-asm']: