bug 1316288 - Fix werror.py and check_cc_clang.py for cases where cc …

…doesn't exist. r=franziskus

--HG--
extra : rebase_source : c2e6020bcbcc97604c52c841dec24702663a04e0

coreconf/check_cc_clang.py

@@ -9,7 +9,11 @@ def main():
         print 0
     else:
         cc = os.environ.get('CC', 'cc')
-        cc_is_clang = 'clang' in subprocess.check_output([cc, '--version'])
+        try:
+            cc_is_clang = 'clang' in subprocess.check_output([cc, '--version'])
+        except OSError:
+            # We probably just don't have CC/cc.
+            cc_is_clang = False
         print int(cc_is_clang)
 
 if __name__ == '__main__':

coreconf/werror.py

@@ -6,7 +6,11 @@
 def main():
     cc = os.environ.get('CC', 'cc')
     sink = open(os.devnull, 'wb')
-    cc_is_clang = 'clang' in subprocess.check_output([cc, '--version'], stderr=sink)
+    try:
+        cc_is_clang = 'clang' in subprocess.check_output([cc, '--version'], stderr=sink)
+    except OSError:
+        # We probably just don't have CC/cc.
+        return
 
     def warning_supported(warning):
         return subprocess.call([cc, '-x', 'c', '-E', '-Werror',