rk: add scripts/clang-wrapper.py

Signed-off-by: Tao Huang <huangtao@rock-chips.com>
Change-Id: Ic51c803563c9f32080c7ee93077d22469cb47df5

scripts/clang-wrapper.py

@@ -0,0 +1,98 @@
+#! /usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2011-2012, The Linux Foundation. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above copyright
+#       notice, this list of conditions and the following disclaimer in the
+#       documentation and/or other materials provided with the distribution.
+#     * Neither the name of The Linux Foundation nor
+#       the names of its contributors may be used to endorse or promote
+#       products derived from this software without specific prior written
+#       permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NON-INFRINGEMENT ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# Invoke clang, looking for warnings, and causing a failure if there are
+# non-whitelisted warnings.
+
+from __future__ import print_function
+import errno
+import re
+import os
+import sys
+import subprocess
+
+allowed_warnings = set([
+ ])
+
+# Capture the name of the object file, can find it.
+ofile = None
+
+do_exit = False;
+
+warning_re = re.compile(r'''(.*/|)([^/]+\.[a-z]+:\d+):(\d+:)? warning:''')
+def interpret_warning(line):
+    """Decode the message from clang.  The messages we care about have a filename, and a warning"""
+    line = line.rstrip('\n')
+    m = warning_re.match(line)
+    if m and m.group(2) not in allowed_warnings:
+        print ("error, forbidden warning:" + m.group(2))
+
+        # If there is a warning, remove any object if it exists.
+        if ofile:
+            try:
+                os.remove(ofile)
+            except OSError:
+                pass
+        global do_exit
+        do_exit = True;
+
+def run_clang():
+    args = sys.argv[1:]
+    # Look for -o
+    try:
+        i = args.index('-o')
+        global ofile
+        ofile = args[i+1]
+    except (ValueError, IndexError):
+        pass
+
+    try:
+        env = os.environ.copy()
+        env['LC_ALL'] = 'C'
+        proc = subprocess.Popen(args, stderr=subprocess.PIPE, env=env)
+        for line in proc.stderr:
+            print (line.decode("utf-8"), end="")
+            interpret_warning(line.decode("utf-8"))
+        if do_exit:
+            sys.exit(1)
+
+        result = proc.wait()
+    except OSError as e:
+        result = e.errno
+        if result == errno.ENOENT:
+            print (args[0] + ':' + e.strerror)
+            print ('Is your PATH set correctly?')
+        else:
+            print (' '.join(args) + str(e))
+
+    return result
+
+if __name__ == '__main__':
+    status = run_clang()
+    sys.exit(status)