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1#!/usr/bin/env python
2#
3# Copyright 2016 Google Inc.
4#
5# Use of this source code is governed by a BSD-style license that can be
6# found in the LICENSE file.
7
8
9"""Create the asset."""
10
11
12import argparse
13import fileinput
14import os
15import shutil
16import subprocess
17import sys
18
19from distutils import dir_util
20
21
22def create_asset(target_dir):
23  """Create the asset."""
24
25  print "Installing some cross-compiling packages. Hit enter to continue."
26  raw_input()
27  subprocess.check_call([
28    "sudo","apt-get","install",
29    "libstdc++-4.8-dev-armhf-cross",
30    "libgcc-4.8-dev-armhf-cross",
31    "binutils-arm-linux-gnueabihf"
32  ])
33
34
35  shutil.copytree('/usr/arm-linux-gnueabihf', target_dir)
36  shutil.copytree('/usr/lib/gcc-cross/arm-linux-gnueabihf/4.8.4',
37    os.path.join(target_dir, 'gcc-cross'))
38  # copy_tree allows copying into a dir that exists
39  # We need to augment the toolchain with some lib*.so that help ld
40  # do its magic as well as some includes that may be useful.
41  dir_util.copy_tree('/usr/x86_64-linux-gnu/arm-linux-gnueabihf/lib',
42                     os.path.join(target_dir, 'lib'))
43  dir_util.copy_tree('/usr/x86_64-linux-gnu/arm-linux-gnueabihf/include',
44                     os.path.join(target_dir, 'include'))
45
46  # The file paths in libpthread.so and libc.so start off as absolute file
47  # paths (e.g. /usr/arm-linux-gnueabihf/lib/libpthread.so.0), which won't
48  # work on the bots. We use fileinput to replace just those lines (which
49  # start with GROUP). fileinput redirects stdout, so printing here actually
50  # writes to the file.
51  bad_libpthread = os.path.join(target_dir, "lib", "libpthread.so")
52  for line in fileinput.input(bad_libpthread, inplace=True):
53    if line.startswith("GROUP"):
54      print "GROUP ( libpthread.so.0 libpthread_nonshared.a )"
55    else:
56      print line
57
58  bad_libc = os.path.join(target_dir, "lib", "libc.so")
59  for line in fileinput.input(bad_libc, inplace=True):
60    if line.startswith("GROUP"):
61      print ("GROUP ( libc.so.6 libc_nonshared.a "
62             "AS_NEEDED ( ld-linux-armhf.so.3 ) )")
63    else:
64      print line
65
66
67def main():
68  if 'linux' not in sys.platform:
69    print >> sys.stderr, 'This script only runs on Linux.'
70    sys.exit(1)
71  parser = argparse.ArgumentParser()
72  parser.add_argument('--target_dir', '-t', required=True)
73  args = parser.parse_args()
74  create_asset(args.target_dir)
75
76
77if __name__ == '__main__':
78  main()
79