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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 a Clang toolchain for Linux hosts."""
10
11
12import argparse
13import os
14import subprocess
15import tempfile
16
17REPO = "https://llvm.googlesource.com/"
18BRANCH = "release_39"
19
20def create_asset(target_dir):
21  # Build Clang, lld, compiler-rt (sanitizer support) and libc++.
22  os.chdir(tempfile.mkdtemp())
23  subprocess.check_call(["git", "clone", "-b", BRANCH, REPO + "llvm"])
24  os.chdir("llvm/tools")
25  subprocess.check_call(["git", "clone", "-b", BRANCH, REPO + "clang"])
26  subprocess.check_call(["git", "clone", "-b", BRANCH, REPO + "lld"])
27  os.chdir("../projects")
28  subprocess.check_call(["git", "clone", "-b", BRANCH, REPO + "compiler-rt"])
29  subprocess.check_call(["git", "clone", "-b", BRANCH, REPO + "libcxx"])
30  subprocess.check_call(["git", "clone", "-b", BRANCH, REPO + "libcxxabi"])
31  os.chdir("..")
32  os.mkdir("out")
33  os.chdir("out")
34  subprocess.check_call(["cmake", "..", "-G", "Ninja",
35                         "-DCMAKE_BUILD_TYPE=MinSizeRel",
36                         "-DCMAKE_INSTALL_PREFIX=" + target_dir,
37                         "-DLLVM_INSTALL_TOOLCHAIN_ONLY=ON",
38                         "-DLLVM_ENABLE_TERMINFO=OFF"])
39  subprocess.check_call(["ninja", "install"])
40
41  # Copy a couple extra files we need.
42  subprocess.check_call(["cp", "bin/llvm-symbolizer", target_dir + "/bin"])
43  libstdcpp = subprocess.check_output(["c++",
44                                       "-print-file-name=libstdc++.so.6"])
45  subprocess.check_call(["cp", libstdcpp.strip(), target_dir + "/lib"])
46
47  # Finally, build libc++ for MSAN bots using the Clang we just built.
48  os.mkdir("../msan_out")
49  os.chdir("../msan_out")
50  subprocess.check_call(["cmake", "..", "-G", "Ninja",
51                         "-DCMAKE_BUILD_TYPE=MinSizeRel",
52                         "-DCMAKE_C_COMPILER="   + target_dir + "/bin/clang",
53                         "-DCMAKE_CXX_COMPILER=" + target_dir + "/bin/clang++",
54                         "-DLLVM_USE_SANITIZER=MemoryWithOrigins"])
55  subprocess.check_call(["ninja", "cxx"])
56  subprocess.check_call(["cp", "-r", "lib",  target_dir + "/msan"])
57
58
59def main():
60  parser = argparse.ArgumentParser()
61  parser.add_argument('--target_dir', '-t', required=True)
62  args = parser.parse_args()
63  create_asset(args.target_dir)
64
65
66if __name__ == '__main__':
67  main()
68