dri: Add a tool for generating #defines to namespace driver global symbols.

Acked-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>

src/mesa/drivers/dri/gen-symbol-redefs.py

@@ -0,0 +1,68 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# Copyright © 2013 Intel Corporation
+#
+# Permission is hereby granted, free of charge, to any person obtaining a
+# copy of this software and associated documentation files (the "Software"),
+# to deal in the Software without restriction, including without limitation
+# the rights to use, copy, modify, merge, publish, distribute, sublicense,
+# and/or sell copies of the Software, and to permit persons to whom the
+# Software is furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice (including the next
+# paragraph) shall be included in all copies or substantial portions of the
+# Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+# IN THE SOFTWARE.
+
+import sys
+import argparse
+import re
+import subprocess
+
+# Example usages:
+# ./gen-symbol-redefs.py i915/.libs/libi915_dri.a old_ i915 i830
+# ./gen-symbol-redefs.py r200/.libs/libr200_dri.a r200_ r200
+
+argparser = argparse.ArgumentParser(description="Generates #defines to hide driver global symbols outside of a driver's namespace.")
+argparser.add_argument("file",
+                    metavar = 'file',
+                    help='libdrivername.a file to read')
+argparser.add_argument("newprefix",
+                    metavar = 'newprefix',
+                    help='New prefix to give non-driver global symbols')
+argparser.add_argument('prefixes',
+                       metavar='prefix',
+                       nargs='*',
+                       help='driver-specific prefixes')
+args = argparser.parse_args()
+
+stdout = subprocess.check_output(['nm', args.file])
+
+for line in stdout.splitlines():
+    m = re.match("[0-9a-z]+ [BT] (.*)", line)
+    if not m:
+        continue
+
+    symbol = m.group(1)
+
+    has_good_prefix = re.match(args.newprefix, symbol) != None
+    for prefix in args.prefixes:
+        if re.match(prefix, symbol):
+            has_good_prefix = True
+            break
+    if has_good_prefix:
+        continue
+
+    # This is the single public entrypoint.
+    if re.match("__driDriverGetExtensions", symbol):
+        continue
+
+    print '#define {0:35} {1}{0}'.format(symbol, args.newprefix)