diff --git a/cc/gen_stub_libs.py b/cc/gen_stub_libs.py
new file mode 100755
index 0000000..a4a0421
--- /dev/null
+++ b/cc/gen_stub_libs.py
@@ -0,0 +1,262 @@
+#!/usr/bin/env python
+#
+# Copyright (C) 2016 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+"""Generates source for stub shared libraries for the NDK."""
+import argparse
+import os
+import re
+
+
+ALL_ARCHITECTURES = (
+    'arm',
+    'arm64',
+    'mips',
+    'mips64',
+    'x86',
+    'x86_64',
+)
+
+
+class Scope(object):
+    """Enum for version script scope.
+
+    Top: Top level of the file.
+    Global: In a version and visibility section where symbols should be visible
+            to the NDK.
+    Local: In a visibility section of a public version where symbols should be
+           hidden to the NDK.
+    Private: In a version where symbols should not be visible to the NDK.
+    """
+    Top = 1
+    Global = 2
+    Local = 3
+    Private = 4
+
+
+class Stack(object):
+    """Basic stack implementation."""
+    def __init__(self):
+        self.stack = []
+
+    def push(self, obj):
+        """Push an item on to the stack."""
+        self.stack.append(obj)
+
+    def pop(self):
+        """Remove and return the item on the top of the stack."""
+        return self.stack.pop()
+
+    @property
+    def top(self):
+        """Return the top of the stack."""
+        return self.stack[-1]
+
+
+def version_is_private(version):
+    """Returns True if the version name should be treated as private."""
+    return version.endswith('_PRIVATE') or version.endswith('_PLATFORM')
+
+
+def enter_version(scope, line, version_file):
+    """Enters a new version block scope."""
+    if scope.top != Scope.Top:
+        raise RuntimeError('Encountered nested version block.')
+
+    # Entering a new version block. By convention symbols with versions ending
+    # with "_PRIVATE" or "_PLATFORM" are not included in the NDK.
+    version_name = line.split('{')[0].strip()
+    if version_is_private(version_name):
+        scope.push(Scope.Private)
+    else:
+        scope.push(Scope.Global)  # By default symbols are visible.
+        version_file.write(line)
+
+
+def leave_version(scope, line, version_file):
+    """Leave a version block scope."""
+    # There is no close to a visibility section, just the end of the version or
+    # a new visiblity section.
+    assert scope.top in (Scope.Global, Scope.Local, Scope.Private)
+    if scope.top != Scope.Private:
+        version_file.write(line)
+    scope.pop()
+    assert scope.top == Scope.Top
+
+
+def enter_visibility(scope, line, version_file):
+    """Enters a new visibility block scope."""
+    leave_visibility(scope)
+    version_file.write(line)
+    visibility = line.split(':')[0].strip()
+    if visibility == 'local':
+        scope.push(Scope.Local)
+    elif visibility == 'global':
+        scope.push(Scope.Global)
+    else:
+        raise RuntimeError('Unknown visiblity label: ' + visibility)
+
+
+def leave_visibility(scope):
+    """Leaves a visibility block scope."""
+    assert scope.top in (Scope.Global, Scope.Local)
+    scope.pop()
+    assert scope.top == Scope.Top
+
+
+def handle_top_scope(scope, line, version_file):
+    """Processes a line in the top level scope."""
+    if '{' in line:
+        enter_version(scope, line, version_file)
+    else:
+        raise RuntimeError('Unexpected contents at top level: ' + line)
+
+
+def handle_private_scope(scope, line, version_file):
+    """Eats all input."""
+    if '}' in line:
+        leave_version(scope, line, version_file)
+
+
+def handle_local_scope(scope, line, version_file):
+    """Passes through input."""
+    if ':' in line:
+        enter_visibility(scope, line, version_file)
+    elif '}' in line:
+        leave_version(scope, line, version_file)
+    else:
+        version_file.write(line)
+
+
+def symbol_in_arch(tags, arch):
+    """Returns true if the symbol is present for the given architecture."""
+    has_arch_tags = False
+    for tag in tags:
+        if tag == arch:
+            return True
+        if tag in ALL_ARCHITECTURES:
+            has_arch_tags = True
+
+    # If there were no arch tags, the symbol is available for all
+    # architectures. If there were any arch tags, the symbol is only available
+    # for the tagged architectures.
+    return not has_arch_tags
+
+
+def symbol_in_version(tags, arch, version):
+    """Returns true if the symbol is present for the given version."""
+    introduced_tag = None
+    arch_specific = False
+    for tag in tags:
+        # If there is an arch-specific tag, it should override the common one.
+        if tag.startswith('introduced=') and not arch_specific:
+            introduced_tag = tag
+        elif tag.startswith('introduced-' + arch + '='):
+            introduced_tag = tag
+            arch_specific = True
+
+    if introduced_tag is None:
+        # We found no "introduced" tags, so the symbol has always been
+        # available.
+        return True
+
+    # The tag is a key=value pair, and we only care about the value now.
+    _, _, version_str = introduced_tag.partition('=')
+    return version >= int(version_str)
+
+
+def handle_global_scope(scope, line, src_file, version_file, arch, api):
+    """Emits present symbols to the version file and stub source file."""
+    if ':' in line:
+        enter_visibility(scope, line, version_file)
+        return
+    if '}' in line:
+        leave_version(scope, line, version_file)
+        return
+
+    if ';' not in line:
+        raise RuntimeError('Expected ; to terminate symbol: ' + line)
+    if '*' in line:
+        raise RuntimeError('Wildcard global symbols are not permitted.')
+
+    # Line is now in the format "<symbol-name>; # tags"
+    # Tags are whitespace separated.
+    symbol_name, _, rest = line.strip().partition(';')
+    _, _, all_tags = rest.partition('#')
+    tags = re.split(r'\s+', all_tags)
+
+    if not symbol_in_arch(tags, arch):
+        return
+    if not symbol_in_version(tags, arch, api):
+        return
+
+    if 'var' in tags:
+        src_file.write('int {} = 0;\n'.format(symbol_name))
+    else:
+        src_file.write('void {}() {{}}\n'.format(symbol_name))
+    version_file.write(line)
+
+
+def generate(symbol_file, src_file, version_file, arch, api):
+    """Generates the stub source file and version script."""
+    scope = Stack()
+    scope.push(Scope.Top)
+    for line in symbol_file:
+        if line.strip() == '' or line.strip().startswith('#'):
+            version_file.write(line)
+        elif scope.top == Scope.Top:
+            handle_top_scope(scope, line, version_file)
+        elif scope.top == Scope.Private:
+            handle_private_scope(scope, line, version_file)
+        elif scope.top == Scope.Local:
+            handle_local_scope(scope, line, version_file)
+        elif scope.top == Scope.Global:
+            handle_global_scope(scope, line, src_file, version_file, arch, api)
+
+
+def parse_args():
+    """Parses and returns command line arguments."""
+    parser = argparse.ArgumentParser()
+
+    parser.add_argument('--api', type=int, help='API level being targeted.')
+    parser.add_argument(
+        '--arch', choices=ALL_ARCHITECTURES,
+        help='Architecture being targeted.')
+
+    parser.add_argument(
+        'symbol_file', type=os.path.realpath, help='Path to symbol file.')
+    parser.add_argument(
+        'stub_src', type=os.path.realpath,
+        help='Path to output stub source file.')
+    parser.add_argument(
+        'version_script', type=os.path.realpath,
+        help='Path to output version script.')
+
+    return parser.parse_args()
+
+
+def main():
+    """Program entry point."""
+    args = parse_args()
+
+    with open(args.symbol_file) as symbol_file:
+        with open(args.stub_src, 'w') as src_file:
+            with open(args.version_script, 'w') as version_file:
+                generate(symbol_file, src_file, version_file, args.arch,
+                         args.api)
+
+
+if __name__ == '__main__':
+    main()