fix bug with not creating proper bitcode output with proper file name when emcc is given -o js

2 files changed, 6 insertions, 2 deletions

diff --git a/emcc b/emcc
index f60cc114..6bb209a5 100755
--- a/emcc
+++ b/emcc
@@ -360,7 +360,10 @@ try:
     assert has_source_inputs, 'Must have source code inputs to use -c'
     target = target_basename + '.o'
 
-  final_suffix = target.split('.')[-1]
+  if '.' in target:
+    final_suffix = target.split('.')[-1]
+  else:
+    final_suffix = ''
 
   # Apply optimization level settings
   shared.Settings.apply_opt_level(opt_level, noisy=True)
diff --git a/tests/runner.py b/tests/runner.py
index 45077ca0..52d619eb 100644
--- a/tests/runner.py
+++ b/tests/runner.py
@@ -5149,7 +5149,8 @@ Options that are modified or new in %s include:
         assert output[1].split('2 errors generated.')[1].replace('\n', '') == 'emcc: compiler frontend failed to generate LLVM bitcode, halting'
 
         # emcc src.cpp -c    and   emcc src.cpp -o src.[o|bc] ==> should give a .bc file
-        for args in [['-c'], ['-o', 'src.o'], ['-o', 'src.bc']]:
+        #      regression check: -o js should create "js", with bitcode content
+        for args in [['-c'], ['-o', 'src.o'], ['-o', 'src.bc'], ['-o', 'js']]:
           target = args[1] if len(args) == 2 else 'hello_world.o'
           clear()
           output = Popen([compiler, path_from_root('tests', 'hello_world' + suffix)] + args, stdout=PIPE, stderr=PIPE).communicate()