tools/clang/scripts/update.py - Issue 2858873005: [infra] Roll clang to match the version used by Flutter

Unified Diff: tools/clang/scripts/update.py

Issue 2858873005: [infra] Roll clang to match the version used by Flutter (Closed)

Patch Set: Fix Mac Android build Created 3 years, 7 months ago

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Index: tools/clang/scripts/update.py

diff --git a/tools/clang/scripts/update.py b/tools/clang/scripts/update.py

deleted file mode 100755

index 100bdec5cc88dd60957affff4f16c1ffb2d6eda4..0000000000000000000000000000000000000000

--- a/tools/clang/scripts/update.py

+++ /dev/null

@@ -1,909 +0,0 @@

-#!/usr/bin/env python

-# Use of this source code is governed by a BSD-style license that can be

-# found in the LICENSE file.

-"""This script is used to download prebuilt clang binaries.

-It is also used by package.py to build the prebuilt clang binaries."""

-import argparse

-import distutils.spawn

-import glob

-import os

-import pipes

-import re

-import shutil

-import subprocess

-import stat

-import sys

-import tarfile

-import tempfile

-import time

-import urllib2

-import zipfile

-# Do NOT CHANGE this if you don't know what you're doing -- see

-# https://chromium.googlesource.com/chromium/src/+/master/docs/updating_clang.md

-# Reverting problematic clang rolls is safe, though.

-CLANG_REVISION = '282487'

-use_head_revision = 'LLVM_FORCE_HEAD_REVISION' in os.environ

-if use_head_revision:

- CLANG_REVISION = 'HEAD'

-# This is incremented when pushing a new build of Clang at the same revision.

-CLANG_SUB_REVISION=1

-PACKAGE_VERSION = "%s-%s" % (CLANG_REVISION, CLANG_SUB_REVISION)

-# Path constants. (All of these should be absolute paths.)

-THIS_DIR = os.path.abspath(os.path.dirname(__file__))

-CHROMIUM_DIR = os.path.abspath(os.path.join(THIS_DIR, '..', '..', '..'))

-THIRD_PARTY_DIR = os.path.join(CHROMIUM_DIR, 'third_party')

-LLVM_DIR = os.path.join(THIRD_PARTY_DIR, 'llvm')

-LLVM_BOOTSTRAP_DIR = os.path.join(THIRD_PARTY_DIR, 'llvm-bootstrap')

-LLVM_BOOTSTRAP_INSTALL_DIR = os.path.join(THIRD_PARTY_DIR,

- 'llvm-bootstrap-install')

-LLVM_LTO_GOLD_PLUGIN_DIR = os.path.join(THIRD_PARTY_DIR, 'llvm-lto-gold-plugin')

-CHROME_TOOLS_SHIM_DIR = os.path.join(LLVM_DIR, 'tools', 'chrometools')

-LLVM_BUILD_DIR = os.path.join(CHROMIUM_DIR, 'third_party', 'llvm-build',

- 'Release+Asserts')

-COMPILER_RT_BUILD_DIR = os.path.join(LLVM_BUILD_DIR, 'compiler-rt')

-CLANG_DIR = os.path.join(LLVM_DIR, 'tools', 'clang')

-LLD_DIR = os.path.join(LLVM_DIR, 'tools', 'lld')

-# compiler-rt is built as part of the regular LLVM build on Windows to get

-# the 64-bit runtime, and out-of-tree elsewhere.

-# TODO(thakis): Try to unify this.

-if sys.platform == 'win32':

- COMPILER_RT_DIR = os.path.join(LLVM_DIR, 'projects', 'compiler-rt')

-else:

- COMPILER_RT_DIR = os.path.join(LLVM_DIR, 'compiler-rt')

-LIBCXX_DIR = os.path.join(LLVM_DIR, 'projects', 'libcxx')

-LIBCXXABI_DIR = os.path.join(LLVM_DIR, 'projects', 'libcxxabi')

-LLVM_BUILD_TOOLS_DIR = os.path.abspath(

- os.path.join(LLVM_DIR, '..', 'llvm-build-tools'))

-STAMP_FILE = os.path.normpath(

- os.path.join(LLVM_DIR, '..', 'llvm-build', 'cr_build_revision'))

-BINUTILS_DIR = os.path.join(THIRD_PARTY_DIR, 'binutils')

-BINUTILS_BIN_DIR = os.path.join(BINUTILS_DIR, BINUTILS_DIR,

- 'Linux_x64', 'Release', 'bin')

-BFD_PLUGINS_DIR = os.path.join(BINUTILS_DIR, 'Linux_x64', 'Release',

- 'lib', 'bfd-plugins')

-VERSION = '4.0.0'

-ANDROID_NDK_DIR = os.path.join(

- CHROMIUM_DIR, 'third_party', 'android_tools', 'ndk')

-# URL for pre-built binaries.

-CDS_URL = os.environ.get('CDS_CLANG_BUCKET_OVERRIDE',

- 'https://commondatastorage.googleapis.com/chromium-browser-clang')

-LLVM_REPO_URL='https://llvm.org/svn/llvm-project'

-if 'LLVM_REPO_URL' in os.environ:

- LLVM_REPO_URL = os.environ['LLVM_REPO_URL']

-# Bump after VC updates.

-DIA_DLL = {

- '2013': 'msdia120.dll',

- '2015': 'msdia140.dll',

-def DownloadUrl(url, output_file):

- """Download url into output_file."""

- CHUNK_SIZE = 4096

- TOTAL_DOTS = 10

- num_retries = 3

- retry_wait_s = 5 # Doubled at each retry.

- while True:

- try:

- sys.stdout.write('Downloading %s ' % url)

- sys.stdout.flush()

- response = urllib2.urlopen(url)

- total_size = int(response.info().getheader('Content-Length').strip())

- bytes_done = 0

- dots_printed = 0

- while True:

- chunk = response.read(CHUNK_SIZE)

- if not chunk:

- break

- output_file.write(chunk)

- bytes_done += len(chunk)

- num_dots = TOTAL_DOTS * bytes_done / total_size

- sys.stdout.write('.' * (num_dots - dots_printed))

- sys.stdout.flush()

- dots_printed = num_dots

- if bytes_done != total_size:

- raise urllib2.URLError("only got %d of %d bytes" %

- (bytes_done, total_size))

- print ' Done.'

- return

- except urllib2.URLError as e:

- sys.stdout.write('\n')

- print e

- if num_retries == 0 or isinstance(e, urllib2.HTTPError) and e.code == 404:

- raise e

- num_retries -= 1

- print 'Retrying in %d s ...' % retry_wait_s

- time.sleep(retry_wait_s)

- retry_wait_s *= 2

-def EnsureDirExists(path):

- if not os.path.exists(path):

- print "Creating directory %s" % path

- os.makedirs(path)

-def DownloadAndUnpack(url, output_dir):

- with tempfile.TemporaryFile() as f:

- DownloadUrl(url, f)

- f.seek(0)

- EnsureDirExists(output_dir)

- if url.endswith('.zip'):

- zipfile.ZipFile(f).extractall(path=output_dir)

- else:

- tarfile.open(mode='r:gz', fileobj=f).extractall(path=output_dir)

-def ReadStampFile(path=STAMP_FILE):

- """Return the contents of the stamp file, or '' if it doesn't exist."""

- try:

- with open(path, 'r') as f:

- return f.read().rstrip()

- except IOError:

- return ''

-def WriteStampFile(s, path=STAMP_FILE):

- """Write s to the stamp file."""

- EnsureDirExists(os.path.dirname(path))

- with open(path, 'w') as f:

- f.write(s)

- f.write('\n')

-def GetSvnRevision(svn_repo):

- """Returns current revision of the svn repo at svn_repo."""

- if sys.platform == 'darwin':

- # mac_files toolchain must be set for hermetic builds.

- root = os.path.dirname(os.path.dirname(os.path.dirname(

- os.path.dirname(__file__))))

- sys.path.append(os.path.join(root, 'build'))

- import mac_toolchain

- mac_toolchain.SetToolchainEnvironment()

- svn_info = subprocess.check_output('svn info ' + svn_repo, shell=True)

- m = re.search(r'Revision: (\d+)', svn_info)

- return m.group(1)

-def RmTree(dir):

- """Delete dir."""

- def ChmodAndRetry(func, path, _):

- # Subversion can leave read-only files around.

- if not os.access(path, os.W_OK):

- os.chmod(path, stat.S_IWUSR)

- return func(path)

- raise

- shutil.rmtree(dir, onerror=ChmodAndRetry)

-def RmCmakeCache(dir):

- """Delete CMake cache related files from dir."""

- for dirpath, dirs, files in os.walk(dir):

- if 'CMakeCache.txt' in files:

- os.remove(os.path.join(dirpath, 'CMakeCache.txt'))

- if 'CMakeFiles' in dirs:

- RmTree(os.path.join(dirpath, 'CMakeFiles'))

-def RunCommand(command, msvc_arch=None, env=None, fail_hard=True):

- """Run command and return success (True) or failure; or if fail_hard is

- True, exit on failure. If msvc_arch is set, runs the command in a

- shell with the msvc tools for that architecture."""

- if msvc_arch and sys.platform == 'win32':

- command = GetVSVersion().SetupScript(msvc_arch) + ['&&'] + command

- # https://docs.python.org/2/library/subprocess.html:

- # "On Unix with shell=True [...] if args is a sequence, the first item

- # specifies the command string, and any additional items will be treated as

- # additional arguments to the shell itself. That is to say, Popen does the

- # equivalent of:

- # Popen(['/bin/sh', '-c', args[0], args[1], ...])"

- #

- # We want to pass additional arguments to command[0], not to the shell,

- # so manually join everything into a single string.

- # Annoyingly, for "svn co url c:\path", pipes.quote() thinks that it should

- # quote c:\path but svn can't handle quoted paths on Windows. Since on

- # Windows follow-on args are passed to args[0] instead of the shell, don't

- # do the single-string transformation there.

- if sys.platform != 'win32':

- command = ' '.join([pipes.quote(c) for c in command])

- print 'Running', command

- if subprocess.call(command, env=env, shell=True) == 0:

- return True

- print 'Failed.'

- if fail_hard:

- sys.exit(1)

- return False

-def CopyFile(src, dst):

- """Copy a file from src to dst."""

- print "Copying %s to %s" % (src, dst)

- shutil.copy(src, dst)

-def CopyDirectoryContents(src, dst, filename_filter=None):

- """Copy the files from directory src to dst

- with an optional filename filter."""

- dst = os.path.realpath(dst) # realpath() in case dst ends in /..

- EnsureDirExists(dst)

- for root, _, files in os.walk(src):

- for f in files:

- if filename_filter and not re.match(filename_filter, f):

- continue

- CopyFile(os.path.join(root, f), dst)

-def Checkout(name, url, dir):

- """Checkout the SVN module at url into dir. Use name for the log message."""

- print "Checking out %s r%s into '%s'" % (name, CLANG_REVISION, dir)

- command = ['svn', 'checkout', '--force', url + '@' + CLANG_REVISION, dir]

- if RunCommand(command, fail_hard=False):

- return

- if os.path.isdir(dir):

- print "Removing %s." % (dir)

- RmTree(dir)

- print "Retrying."

- RunCommand(command)

-def DeleteChromeToolsShim():

- OLD_SHIM_DIR = os.path.join(LLVM_DIR, 'tools', 'zzz-chrometools')

- shutil.rmtree(OLD_SHIM_DIR, ignore_errors=True)

- shutil.rmtree(CHROME_TOOLS_SHIM_DIR, ignore_errors=True)

-def CreateChromeToolsShim():

- """Hooks the Chrome tools into the LLVM build.

- Several Chrome tools have dependencies on LLVM/Clang libraries. The LLVM build

- detects implicit tools in the tools subdirectory, so this helper install a

- shim CMakeLists.txt that forwards to the real directory for the Chrome tools.

- Note that the shim directory name intentionally has no - or _. The implicit

- tool detection logic munges them in a weird way."""

- assert not any(i in os.path.basename(CHROME_TOOLS_SHIM_DIR) for i in '-_')

- os.mkdir(CHROME_TOOLS_SHIM_DIR)

- with file(os.path.join(CHROME_TOOLS_SHIM_DIR, 'CMakeLists.txt'), 'w') as f:

- f.write('# Automatically generated by tools/clang/scripts/update.py. ' +

- 'Do not edit.\n')

- f.write('# Since tools/clang is located in another directory, use the \n')

- f.write('# two arg version to specify where build artifacts go. CMake\n')

- f.write('# disallows reuse of the same binary dir for multiple source\n')

- f.write('# dirs, so the build artifacts need to go into a subdirectory.\n')

- f.write('if (CHROMIUM_TOOLS_SRC)\n')

- f.write(' add_subdirectory(${CHROMIUM_TOOLS_SRC} ' +

- '${CMAKE_CURRENT_BINARY_DIR}/a)\n')

- f.write('endif (CHROMIUM_TOOLS_SRC)\n')

-def DownloadHostGcc(args):

- """Downloads gcc 4.8.5 and makes sure args.gcc_toolchain is set."""

- if not sys.platform.startswith('linux') or args.gcc_toolchain:

- return

- # Unconditionally download a prebuilt gcc to guarantee the included libstdc++

- # works on Ubuntu Precise.

- gcc_dir = os.path.join(LLVM_BUILD_TOOLS_DIR, 'gcc485precise')

- if not os.path.exists(gcc_dir):

- print 'Downloading pre-built GCC 4.8.5...'

- DownloadAndUnpack(

- CDS_URL + '/tools/gcc485precise.tgz', LLVM_BUILD_TOOLS_DIR)

- args.gcc_toolchain = gcc_dir

-def AddCMakeToPath():

- """Download CMake and add it to PATH."""

- if sys.platform == 'win32':

- zip_name = 'cmake-3.4.3-win32-x86.zip'

- cmake_dir = os.path.join(LLVM_BUILD_TOOLS_DIR,

- 'cmake-3.4.3-win32-x86', 'bin')

- else:

- suffix = 'Darwin' if sys.platform == 'darwin' else 'Linux'

- zip_name = 'cmake343_%s.tgz' % suffix

- cmake_dir = os.path.join(LLVM_BUILD_TOOLS_DIR, 'cmake343', 'bin')

- if not os.path.exists(cmake_dir):

- DownloadAndUnpack(CDS_URL + '/tools/' + zip_name, LLVM_BUILD_TOOLS_DIR)

- os.environ['PATH'] = cmake_dir + os.pathsep + os.environ.get('PATH', '')

-def AddGnuWinToPath():

- """Download some GNU win tools and add them to PATH."""

- if sys.platform != 'win32':

- return

- gnuwin_dir = os.path.join(LLVM_BUILD_TOOLS_DIR, 'gnuwin')

- GNUWIN_VERSION = '5'

- GNUWIN_STAMP = os.path.join(gnuwin_dir, 'stamp')

- if ReadStampFile(GNUWIN_STAMP) == GNUWIN_VERSION:

- print 'GNU Win tools already up to date.'

- else:

- zip_name = 'gnuwin-%s.zip' % GNUWIN_VERSION

- DownloadAndUnpack(CDS_URL + '/tools/' + zip_name, LLVM_BUILD_TOOLS_DIR)

- WriteStampFile(GNUWIN_VERSION, GNUWIN_STAMP)

- os.environ['PATH'] = gnuwin_dir + os.pathsep + os.environ.get('PATH', '')

-vs_version = None

-def GetVSVersion():

- global vs_version

- if vs_version:

- return vs_version

- # Try using the toolchain in depot_tools.

- # This sets environment variables used by SelectVisualStudioVersion below.

- sys.path.append(os.path.join(CHROMIUM_DIR, 'build'))

- import vs_toolchain

- vs_toolchain.SetEnvironmentAndGetRuntimeDllDirs()

- # Use gyp to find the MSVS installation, either in depot_tools as per above,

- # or a system-wide installation otherwise.

- sys.path.append(os.path.join(CHROMIUM_DIR, 'tools', 'gyp', 'pylib'))

- import gyp.MSVSVersion

- vs_version = gyp.MSVSVersion.SelectVisualStudioVersion(

- vs_toolchain.GetVisualStudioVersion())

- return vs_version

-def CopyDiaDllTo(target_dir):

- # This script always wants to use the 64-bit msdia*.dll.

- dia_path = os.path.join(GetVSVersion().Path(), 'DIA SDK', 'bin', 'amd64')

- dia_dll = os.path.join(dia_path, DIA_DLL[GetVSVersion().ShortName()])

- CopyFile(dia_dll, target_dir)

-def VeryifyVersionOfBuiltClangMatchesVERSION():

- """Checks that `clang --version` outputs VERSION. If this fails, VERSION

- in this file is out-of-date and needs to be updated (possibly in an

- `if use_head_revision:` block in main() first)."""

- clang = os.path.join(LLVM_BUILD_DIR, 'bin', 'clang')

- if sys.platform == 'win32':

- # TODO: Parse `clang-cl /?` output for built clang's version and check that

- # to check the binary we're actually shipping? But clang-cl.exe is just

- # a copy of clang.exe, so this does check the same thing.

- clang += '.exe'

- version_out = subprocess.check_output([clang, '--version'])

- version_out = re.match(r'clang version ([0-9.]+)', version_out).group(1)

- if version_out != VERSION:

- print ('unexpected clang version %s (not %s), update VERSION in update.py'

- % (version_out, VERSION))

- sys.exit(1)

-def UpdateClang(args):

- print 'Updating Clang to %s...' % PACKAGE_VERSION

- need_gold_plugin = 'LLVM_DOWNLOAD_GOLD_PLUGIN' in os.environ or (

- sys.platform.startswith('linux') and

- 'buildtype=Official' in os.environ.get('GYP_DEFINES', '') and

- 'branding=Chrome' in os.environ.get('GYP_DEFINES', ''))

- if ReadStampFile() == PACKAGE_VERSION and not args.force_local_build:

- print 'Clang is already up to date.'

- if not need_gold_plugin or os.path.exists(

- os.path.join(LLVM_BUILD_DIR, "lib/LLVMgold.so")):

- return 0

- # Reset the stamp file in case the build is unsuccessful.

- WriteStampFile('')

- if not args.force_local_build:

- cds_file = "clang-%s.tgz" % PACKAGE_VERSION

- if sys.platform == 'win32' or sys.platform == 'cygwin':

- cds_full_url = CDS_URL + '/Win/' + cds_file

- elif sys.platform == 'darwin':

- cds_full_url = CDS_URL + '/Mac/' + cds_file

- else:

- assert sys.platform.startswith('linux')

- cds_full_url = CDS_URL + '/Linux_x64/' + cds_file

- print 'Downloading prebuilt clang'

- if os.path.exists(LLVM_BUILD_DIR):

- RmTree(LLVM_BUILD_DIR)

- try:

- DownloadAndUnpack(cds_full_url, LLVM_BUILD_DIR)

- print 'clang %s unpacked' % PACKAGE_VERSION

- if sys.platform == 'win32':

- CopyDiaDllTo(os.path.join(LLVM_BUILD_DIR, 'bin'))

- # Download the gold plugin if requested to by an environment variable.

- # This is used by the CFI ClusterFuzz bot, and it's required for official

- # builds on linux.

- if need_gold_plugin:

- RunCommand(['python', CHROMIUM_DIR+'/build/download_gold_plugin.py'])

- WriteStampFile(PACKAGE_VERSION)

- return 0

- except urllib2.URLError:

- print 'Failed to download prebuilt clang %s' % cds_file

- print 'Use --force-local-build if you want to build locally.'

- print 'Exiting.'

- return 1

- if args.with_android and not os.path.exists(ANDROID_NDK_DIR):

- print 'Android NDK not found at ' + ANDROID_NDK_DIR

- print 'The Android NDK is needed to build a Clang whose -fsanitize=address'

- print 'works on Android. See '

- print 'https://www.chromium.org/developers/how-tos/android-build-instructions'

- print 'for how to install the NDK, or pass --without-android.'

- return 1

- DownloadHostGcc(args)

- AddCMakeToPath()

- AddGnuWinToPath()

- DeleteChromeToolsShim()

- Checkout('LLVM', LLVM_REPO_URL + '/llvm/trunk', LLVM_DIR)

- Checkout('Clang', LLVM_REPO_URL + '/cfe/trunk', CLANG_DIR)

- if sys.platform == 'win32' or use_head_revision:

- Checkout('LLD', LLVM_REPO_URL + '/lld/trunk', LLD_DIR)

- Checkout('compiler-rt', LLVM_REPO_URL + '/compiler-rt/trunk', COMPILER_RT_DIR)

- if sys.platform == 'darwin':

- # clang needs a libc++ checkout, else -stdlib=libc++ won't find includes

- # (i.e. this is needed for bootstrap builds).

- Checkout('libcxx', LLVM_REPO_URL + '/libcxx/trunk', LIBCXX_DIR)

- # We used to check out libcxxabi on OS X; we no longer need that.

- if os.path.exists(LIBCXXABI_DIR):

- RmTree(LIBCXXABI_DIR)

- cc, cxx = None, None

- libstdcpp = None

- if args.gcc_toolchain: # This option is only used on Linux.

- # Use the specified gcc installation for building.

- cc = os.path.join(args.gcc_toolchain, 'bin', 'gcc')

- cxx = os.path.join(args.gcc_toolchain, 'bin', 'g++')

- if not os.access(cc, os.X_OK):

- print 'Invalid --gcc-toolchain: "%s"' % args.gcc_toolchain

- print '"%s" does not appear to be valid.' % cc

- return 1

- # Set LD_LIBRARY_PATH to make auxiliary targets (tablegen, bootstrap

- # compiler, etc.) find the .so.

- libstdcpp = subprocess.check_output(

- [cxx, '-print-file-name=libstdc++.so.6']).rstrip()

- os.environ['LD_LIBRARY_PATH'] = os.path.dirname(libstdcpp)

- cflags = []

- cxxflags = []

- ldflags = []

- base_cmake_args = ['-GNinja',

- '-DCMAKE_BUILD_TYPE=Release',

- '-DLLVM_ENABLE_ASSERTIONS=ON',

- '-DLLVM_ENABLE_THREADS=OFF',

- '-DLLVM_ENABLE_TIMESTAMPS=OFF',

- # Statically link MSVCRT to avoid DLL dependencies.

- '-DLLVM_USE_CRT_RELEASE=MT',

- ]

- binutils_incdir = ''

- if sys.platform.startswith('linux'):

- binutils_incdir = os.path.join(BINUTILS_DIR, 'Linux_x64/Release/include')

- if args.bootstrap:

- print 'Building bootstrap compiler'

- EnsureDirExists(LLVM_BOOTSTRAP_DIR)

- os.chdir(LLVM_BOOTSTRAP_DIR)

- bootstrap_args = base_cmake_args + [

- '-DLLVM_BINUTILS_INCDIR=' + binutils_incdir,

- '-DLLVM_TARGETS_TO_BUILD=host',

- '-DCMAKE_INSTALL_PREFIX=' + LLVM_BOOTSTRAP_INSTALL_DIR,

- '-DCMAKE_C_FLAGS=' + ' '.join(cflags),

- '-DCMAKE_CXX_FLAGS=' + ' '.join(cxxflags),

- ]

- if cc is not None: bootstrap_args.append('-DCMAKE_C_COMPILER=' + cc)

- if cxx is not None: bootstrap_args.append('-DCMAKE_CXX_COMPILER=' + cxx)

- RmCmakeCache('.')

- RunCommand(['cmake'] + bootstrap_args + [LLVM_DIR], msvc_arch='x64')

- RunCommand(['ninja'], msvc_arch='x64')

- if args.run_tests:

- if sys.platform == 'win32':

- CopyDiaDllTo(os.path.join(LLVM_BOOTSTRAP_DIR, 'bin'))

- RunCommand(['ninja', 'check-all'], msvc_arch='x64')

- RunCommand(['ninja', 'install'], msvc_arch='x64')

- if args.gcc_toolchain:

- # Copy that gcc's stdlibc++.so.6 to the build dir, so the bootstrap

- # compiler can start.

- CopyFile(libstdcpp, os.path.join(LLVM_BOOTSTRAP_INSTALL_DIR, 'lib'))

- if sys.platform == 'win32':

- cc = os.path.join(LLVM_BOOTSTRAP_INSTALL_DIR, 'bin', 'clang-cl.exe')

- cxx = os.path.join(LLVM_BOOTSTRAP_INSTALL_DIR, 'bin', 'clang-cl.exe')

- # CMake has a hard time with backslashes in compiler paths:

- # https://stackoverflow.com/questions/13050827

- cc = cc.replace('\\', '/')

- cxx = cxx.replace('\\', '/')

- else:

- cc = os.path.join(LLVM_BOOTSTRAP_INSTALL_DIR, 'bin', 'clang')

- cxx = os.path.join(LLVM_BOOTSTRAP_INSTALL_DIR, 'bin', 'clang++')

- if args.gcc_toolchain:

- # Tell the bootstrap compiler to use a specific gcc prefix to search

- # for standard library headers and shared object files.

- cflags = ['--gcc-toolchain=' + args.gcc_toolchain]

- cxxflags = ['--gcc-toolchain=' + args.gcc_toolchain]

- print 'Building final compiler'

- # Build LLVM gold plugin with LTO. That speeds up the linker by ~10%.

- # We only use LTO for Linux now.

- if args.bootstrap and args.lto_gold_plugin:

- print 'Building LTO LLVM Gold plugin'

- if os.path.exists(LLVM_LTO_GOLD_PLUGIN_DIR):

- RmTree(LLVM_LTO_GOLD_PLUGIN_DIR)

- EnsureDirExists(LLVM_LTO_GOLD_PLUGIN_DIR)

- os.chdir(LLVM_LTO_GOLD_PLUGIN_DIR)

- # Create a symlink to LLVMgold.so build in the previous step so that ar

- # and ranlib could find it while linking LLVMgold.so with LTO.

- EnsureDirExists(BFD_PLUGINS_DIR)

- RunCommand(['ln', '-sf',

- os.path.join(LLVM_BOOTSTRAP_INSTALL_DIR, 'lib', 'LLVMgold.so'),

- os.path.join(BFD_PLUGINS_DIR, 'LLVMgold.so')])

- lto_cflags = ['-flto']

- lto_ldflags = ['-fuse-ld=gold']

- if args.gcc_toolchain:

- # Tell the bootstrap compiler to use a specific gcc prefix to search

- # for standard library headers and shared object files.

- lto_cflags += ['--gcc-toolchain=' + args.gcc_toolchain]

- lto_cmake_args = base_cmake_args + [

- '-DLLVM_BINUTILS_INCDIR=' + binutils_incdir,

- '-DCMAKE_C_COMPILER=' + cc,

- '-DCMAKE_CXX_COMPILER=' + cxx,

- '-DCMAKE_C_FLAGS=' + ' '.join(lto_cflags),

- '-DCMAKE_CXX_FLAGS=' + ' '.join(lto_cflags),

- '-DCMAKE_EXE_LINKER_FLAGS=' + ' '.join(lto_ldflags),

- '-DCMAKE_SHARED_LINKER_FLAGS=' + ' '.join(lto_ldflags),

- '-DCMAKE_MODULE_LINKER_FLAGS=' + ' '.join(lto_ldflags)]

- # We need to use the proper binutils which support LLVM Gold plugin.

- lto_env = os.environ.copy()

- lto_env['PATH'] = BINUTILS_BIN_DIR + os.pathsep + lto_env.get('PATH', '')

- RmCmakeCache('.')

- RunCommand(['cmake'] + lto_cmake_args + [LLVM_DIR], env=lto_env)

- RunCommand(['ninja', 'LLVMgold'], env=lto_env)

- # LLVM uses C++11 starting in llvm 3.5. On Linux, this means libstdc++4.7+ is

- # needed, on OS X it requires libc++. clang only automatically links to libc++

- # when targeting OS X 10.9+, so add stdlib=libc++ explicitly so clang can run

- # on OS X versions as old as 10.7.

- deployment_target = ''

- if sys.platform == 'darwin' and args.bootstrap:

- # When building on 10.9, /usr/include usually doesn't exist, and while

- # Xcode's clang automatically sets a sysroot, self-built clangs don't.

- cflags = ['-isysroot', subprocess.check_output(

- ['xcrun', '--show-sdk-path']).rstrip()]

- cxxflags = ['-stdlib=libc++'] + cflags

- ldflags += ['-stdlib=libc++']

- deployment_target = '10.7'

- # Running libc++ tests takes a long time. Since it was only needed for

- # the install step above, don't build it as part of the main build.

- # This makes running package.py over 10% faster (30 min instead of 34 min)

- RmTree(LIBCXX_DIR)

- # Build clang.

- # If building at head, define a macro that plugins can use for #ifdefing

- # out code that builds at head, but not at CLANG_REVISION or vice versa.

- if use_head_revision:

- cflags += ['-DLLVM_FORCE_HEAD_REVISION']

- cxxflags += ['-DLLVM_FORCE_HEAD_REVISION']

- CreateChromeToolsShim()

- deployment_env = None

- if deployment_target:

- deployment_env = os.environ.copy()

- deployment_env['MACOSX_DEPLOYMENT_TARGET'] = deployment_target

- cmake_args = []

- # TODO(thakis): Unconditionally append this to base_cmake_args instead once

- # compiler-rt can build with clang-cl on Windows (http://llvm.org/PR23698)

- cc_args = base_cmake_args if sys.platform != 'win32' else cmake_args

- if cc is not None: cc_args.append('-DCMAKE_C_COMPILER=' + cc)

- if cxx is not None: cc_args.append('-DCMAKE_CXX_COMPILER=' + cxx)

- cmake_args += base_cmake_args + [

- '-DLLVM_BINUTILS_INCDIR=' + binutils_incdir,

- '-DCMAKE_C_FLAGS=' + ' '.join(cflags),

- '-DCMAKE_CXX_FLAGS=' + ' '.join(cxxflags),

- '-DCMAKE_EXE_LINKER_FLAGS=' + ' '.join(ldflags),

- '-DCMAKE_SHARED_LINKER_FLAGS=' + ' '.join(ldflags),

- '-DCMAKE_MODULE_LINKER_FLAGS=' + ' '.join(ldflags),

- '-DCMAKE_INSTALL_PREFIX=' + LLVM_BUILD_DIR,

- # TODO(thakis): Remove this once official builds pass -Wl,--build-id

- # explicitly, https://crbug.com/622775

- '-DENABLE_LINKER_BUILD_ID=ON',

- '-DCHROMIUM_TOOLS_SRC=%s' % os.path.join(CHROMIUM_DIR, 'tools', 'clang'),

- '-DCHROMIUM_TOOLS=%s' % ';'.join(args.tools)]

- EnsureDirExists(LLVM_BUILD_DIR)

- os.chdir(LLVM_BUILD_DIR)

- RmCmakeCache('.')

- RunCommand(['cmake'] + cmake_args + [LLVM_DIR],

- msvc_arch='x64', env=deployment_env)

- if args.gcc_toolchain:

- # Copy in the right stdlibc++.so.6 so clang can start.

- if not os.path.exists(os.path.join(LLVM_BUILD_DIR, 'lib')):

- os.mkdir(os.path.join(LLVM_BUILD_DIR, 'lib'))

- libstdcpp = subprocess.check_output(

- [cxx] + cxxflags + ['-print-file-name=libstdc++.so.6']).rstrip()

- CopyFile(libstdcpp, os.path.join(LLVM_BUILD_DIR, 'lib'))

- RunCommand(['ninja'], msvc_arch='x64')

- if args.tools:

- # If any Chromium tools were built, install those now.

- RunCommand(['ninja', 'cr-install'], msvc_arch='x64')

- if sys.platform == 'darwin':

- # See http://crbug.com/256342

- RunCommand(['strip', '-x', os.path.join(LLVM_BUILD_DIR, 'bin', 'clang')])

- elif sys.platform.startswith('linux'):

- RunCommand(['strip', os.path.join(LLVM_BUILD_DIR, 'bin', 'clang')])

- VeryifyVersionOfBuiltClangMatchesVERSION()

- # Do an out-of-tree build of compiler-rt.

- # On Windows, this is used to get the 32-bit ASan run-time.

- # TODO(hans): Remove once the regular build above produces this.

- # On Mac and Linux, this is used to get the regular 64-bit run-time.

- # Do a clobbered build due to cmake changes.

- if os.path.isdir(COMPILER_RT_BUILD_DIR):

- RmTree(COMPILER_RT_BUILD_DIR)

- os.makedirs(COMPILER_RT_BUILD_DIR)

- os.chdir(COMPILER_RT_BUILD_DIR)

- # TODO(thakis): Add this once compiler-rt can build with clang-cl (see

- # above).

- #if args.bootstrap and sys.platform == 'win32':

- # The bootstrap compiler produces 64-bit binaries by default.

- #cflags += ['-m32']

- #cxxflags += ['-m32']

- compiler_rt_args = base_cmake_args + [

- '-DCMAKE_C_FLAGS=' + ' '.join(cflags),

- '-DCMAKE_CXX_FLAGS=' + ' '.join(cxxflags)]

- if sys.platform == 'darwin':

- compiler_rt_args += ['-DCOMPILER_RT_ENABLE_IOS=ON']

- if sys.platform != 'win32':

- compiler_rt_args += ['-DLLVM_CONFIG_PATH=' +

- os.path.join(LLVM_BUILD_DIR, 'bin', 'llvm-config'),

- '-DSANITIZER_MIN_OSX_VERSION="10.7"']

- # compiler-rt is part of the llvm checkout on Windows but a stand-alone

- # directory elsewhere, see the TODO above COMPILER_RT_DIR.

- RmCmakeCache('.')

- RunCommand(['cmake'] + compiler_rt_args +

- [LLVM_DIR if sys.platform == 'win32' else COMPILER_RT_DIR],

- msvc_arch='x86', env=deployment_env)

- RunCommand(['ninja', 'compiler-rt'], msvc_arch='x86')

- # Copy select output to the main tree.

- # TODO(hans): Make this (and the .gypi and .isolate files) version number

- # independent.

- if sys.platform == 'win32':

- platform = 'windows'

- elif sys.platform == 'darwin':

- platform = 'darwin'

- else:

- assert sys.platform.startswith('linux')

- platform = 'linux'

- asan_rt_lib_src_dir = os.path.join(COMPILER_RT_BUILD_DIR, 'lib', platform)

- if sys.platform == 'win32':

- # TODO(thakis): This too is due to compiler-rt being part of the checkout

- # on Windows, see TODO above COMPILER_RT_DIR.

- asan_rt_lib_src_dir = os.path.join(COMPILER_RT_BUILD_DIR, 'lib', 'clang',

- VERSION, 'lib', platform)

- asan_rt_lib_dst_dir = os.path.join(LLVM_BUILD_DIR, 'lib', 'clang',

- VERSION, 'lib', platform)

- # Blacklists:

- CopyDirectoryContents(os.path.join(asan_rt_lib_src_dir, '..', '..'),

- os.path.join(asan_rt_lib_dst_dir, '..', '..'),

- r'^.*blacklist\.txt$')

- # Headers:

- if sys.platform != 'win32':

- CopyDirectoryContents(

- os.path.join(COMPILER_RT_BUILD_DIR, 'include/sanitizer'),

- os.path.join(LLVM_BUILD_DIR, 'lib/clang', VERSION, 'include/sanitizer'))

- # Static and dynamic libraries:

- CopyDirectoryContents(asan_rt_lib_src_dir, asan_rt_lib_dst_dir)

- if sys.platform == 'darwin':

- for dylib in glob.glob(os.path.join(asan_rt_lib_dst_dir, '*.dylib')):

- # Fix LC_ID_DYLIB for the ASan dynamic libraries to be relative to

- # @executable_path.

- # TODO(glider): this is transitional. We'll need to fix the dylib

- # name either in our build system, or in Clang. See also

- # http://crbug.com/344836.

- subprocess.call(['install_name_tool', '-id',

- '@executable_path/' + os.path.basename(dylib), dylib])

- if sys.platform == 'win32':

- # Make an extra copy of the sanitizer headers, to be put on the include path

- # of the fallback compiler.

- sanitizer_include_dir = os.path.join(LLVM_BUILD_DIR, 'lib', 'clang',

- VERSION, 'include', 'sanitizer')

- aux_sanitizer_include_dir = os.path.join(LLVM_BUILD_DIR, 'lib', 'clang',

- VERSION, 'include_sanitizer',

- 'sanitizer')

- EnsureDirExists(aux_sanitizer_include_dir)

- for _, _, files in os.walk(sanitizer_include_dir):

- for f in files:

- CopyFile(os.path.join(sanitizer_include_dir, f),

- aux_sanitizer_include_dir)

- if args.with_android:

- make_toolchain = os.path.join(

- ANDROID_NDK_DIR, 'build', 'tools', 'make_standalone_toolchain.py')

- for target_arch in ['aarch64', 'arm', 'i686']:

- # Make standalone Android toolchain for target_arch.

- toolchain_dir = os.path.join(

- LLVM_BUILD_DIR, 'android-toolchain-' + target_arch)

- RunCommand([

- make_toolchain,

- '--api=' + ('21' if target_arch == 'aarch64' else '19'),

- '--force',

- '--install-dir=%s' % toolchain_dir,

- '--stl=stlport',

- '--arch=' + {

- 'aarch64': 'arm64',

- 'arm': 'arm',

- 'i686': 'x86',

- }[target_arch]])

- # Android NDK r9d copies a broken unwind.h into the toolchain, see

- # http://crbug.com/357890

- for f in glob.glob(os.path.join(toolchain_dir, 'include/c++/*/unwind.h')):

- os.remove(f)

- # Build ASan runtime for Android in a separate build tree.

- build_dir = os.path.join(LLVM_BUILD_DIR, 'android-' + target_arch)

- if not os.path.exists(build_dir):

- os.mkdir(os.path.join(build_dir))

- os.chdir(build_dir)

- cflags = ['--target=%s-linux-androideabi' % target_arch,

- '--sysroot=%s/sysroot' % toolchain_dir,

- '-B%s' % toolchain_dir]

- android_args = base_cmake_args + [

- '-DCMAKE_C_COMPILER=' + os.path.join(LLVM_BUILD_DIR, 'bin/clang'),

- '-DCMAKE_CXX_COMPILER=' + os.path.join(LLVM_BUILD_DIR, 'bin/clang++'),

- '-DLLVM_CONFIG_PATH=' + os.path.join(LLVM_BUILD_DIR, 'bin/llvm-config'),

- '-DCMAKE_C_FLAGS=' + ' '.join(cflags),

- '-DCMAKE_CXX_FLAGS=' + ' '.join(cflags),

- '-DANDROID=1']

- RmCmakeCache('.')

- RunCommand(['cmake'] + android_args + [COMPILER_RT_DIR])

- RunCommand(['ninja', 'libclang_rt.asan-%s-android.so' % target_arch])

- # And copy it into the main build tree.

- runtime = 'libclang_rt.asan-%s-android.so' % target_arch

- for root, _, files in os.walk(build_dir):

- if runtime in files:

- shutil.copy(os.path.join(root, runtime), asan_rt_lib_dst_dir)

- # Run tests.

- if args.run_tests or use_head_revision:

- os.chdir(LLVM_BUILD_DIR)

- RunCommand(['ninja', 'cr-check-all'], msvc_arch='x64')

- if args.run_tests:

- if sys.platform == 'win32':

- CopyDiaDllTo(os.path.join(LLVM_BUILD_DIR, 'bin'))

- os.chdir(LLVM_BUILD_DIR)

- RunCommand(['ninja', 'check-all'], msvc_arch='x64')

- WriteStampFile(PACKAGE_VERSION)

- print 'Clang update was successful.'

- return 0

-def main():

- parser = argparse.ArgumentParser(description='Build Clang.')

- parser.add_argument('--bootstrap', action='store_true',

- help='first build clang with CC, then with itself.')

- parser.add_argument('--if-needed', action='store_true',

- help="run only if the script thinks clang is needed")

- parser.add_argument('--force-local-build', action='store_true',

- help="don't try to download prebuild binaries")

- parser.add_argument('--gcc-toolchain', help='set the version for which gcc '

- 'version be used for building; --gcc-toolchain=/opt/foo '

- 'picks /opt/foo/bin/gcc')

- parser.add_argument('--lto-gold-plugin', action='store_true',

- help='build LLVM Gold plugin with LTO')

- parser.add_argument('--llvm-force-head-revision', action='store_true',

- help=('use the revision in the repo when printing '

- 'the revision'))

- parser.add_argument('--print-revision', action='store_true',

- help='print current clang revision and exit.')

- parser.add_argument('--print-clang-version', action='store_true',

- help='print current clang version (e.g. x.y.z) and exit.')

- parser.add_argument('--run-tests', action='store_true',

- help='run tests after building; only for local builds')

- parser.add_argument('--tools', nargs='*',

- help='select which chrome tools to build',

- default=['plugins', 'blink_gc_plugin'])

- parser.add_argument('--without-android', action='store_false',

- help='don\'t build Android ASan runtime (linux only)',

- dest='with_android',

- default=sys.platform.startswith('linux'))

- args = parser.parse_args()

- if args.lto_gold_plugin and not args.bootstrap:

- print '--lto-gold-plugin requires --bootstrap'

- return 1

- if args.lto_gold_plugin and not sys.platform.startswith('linux'):

- print '--lto-gold-plugin is only effective on Linux. Ignoring the option.'

- args.lto_gold_plugin = False

- if args.if_needed:

- is_clang_required = False

- # clang is always used on Mac and Linux.

- if sys.platform == 'darwin' or sys.platform.startswith('linux'):

- is_clang_required = True

- # clang requested via $GYP_DEFINES.

- if re.search(r'\b(clang|asan|lsan|msan|tsan)=1',

- os.environ.get('GYP_DEFINES', '')):

- is_clang_required = True

- # clang previously downloaded, keep it up to date.

- # If you don't want this, delete third_party/llvm-build on your machine.

- if os.path.isdir(LLVM_BUILD_DIR):

- is_clang_required = True

- if not is_clang_required:

- return 0

- if re.search(r'\b(make_clang_dir)=', os.environ.get('GYP_DEFINES', '')):

- print 'Skipping Clang update (make_clang_dir= was set in GYP_DEFINES).'

- return 0

- global CLANG_REVISION, PACKAGE_VERSION

- if args.print_revision:

- if use_head_revision or args.llvm_force_head_revision:

- print GetSvnRevision(LLVM_DIR)

- else:

- print PACKAGE_VERSION

- return 0

- if args.print_clang_version:

- sys.stdout.write(VERSION)

- return 0

- # Don't buffer stdout, so that print statements are immediately flushed.

- # Do this only after --print-revision has been handled, else we'll get

- # an error message when this script is run from gn for some reason.

- sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 0)

- if use_head_revision:

- # Use a real revision number rather than HEAD to make sure that the stamp

- # file logic works.

- CLANG_REVISION = GetSvnRevision(LLVM_REPO_URL)

- PACKAGE_VERSION = CLANG_REVISION + '-0'

- args.force_local_build = True

- if 'OS=android' not in os.environ.get('GYP_DEFINES', ''):

- # Only build the Android ASan rt on ToT bots when targetting Android.

- args.with_android = False

- return UpdateClang(args)

-if __name__ == '__main__':

- sys.exit(main())

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