Add the _Exit symbol

Author: tomaka

AUTHORS

@@ -235,3 +235,4 @@ a license to everyone to use it as detailed in LICENSE.)
 * Richard Cook <[email protected]> (copyright owned by Tableau Software, Inc.)
 * Arnab Choudhury <[email protected]> (copyright owned by Tableau Software, Inc.)
 * Charles Vaughn <[email protected]> (copyright owned by Tableau Software, Inc.)
+* Pierre Krieger <[email protected]>

src/library.js

@@ -494,6 +494,10 @@ LibraryManager.library = {
   exit: function(status) {
     __exit(status);
   },
+  _Exit__deps: ['exit'],
+  _Exit: function(status) {
+    __exit(status);
+  },
 
   _ZSt9terminatev__deps: ['exit'],
   _ZSt9terminatev: function() {

tests/test_core.py

@@ -7552,7 +7552,12 @@ def test_exit_status(self):
       int main() {
         atexit(cleanup); // this atexit should still be called
         printf("hello, world!\n");
-        exit(118); // Unusual exit status to make sure it's working!
+        // Unusual exit status to make sure it's working!
+        if (CAPITAL_EXIT) {
+          _Exit(118);
+        } else {
+          exit(118);
+        }
       }
     '''
     open('post.js', 'w').write('''
@@ -7562,7 +7567,8 @@ def test_exit_status(self):
       Module.callMain();
     ''')
     self.emcc_args += ['-s', 'INVOKE_RUN=0', '--post-js', 'post.js']
-    self.do_run(src, 'hello, world!\ncleanup\nI see exit status: 118')
+    self.do_run(src.replace('CAPITAL_EXIT', '0'), 'hello, world!\ncleanup\nI see exit status: 118')
+    self.do_run(src.replace('CAPITAL_EXIT', '1'), 'hello, world!\ncleanup\nI see exit status: 118')
 
   def test_noexitruntime(self):
     src = r'''