| #!/usr/bin/env python3 |
| # Copyright 2019 The Chromium Authors. All rights reserved. |
| # 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 build clang binaries. It is used by package.py to |
| create the prebuilt binaries downloaded by update.py and used by developers. |
| |
| The expectation is that update.py downloads prebuilt binaries for everyone, and |
| nobody should run this script as part of normal development. |
| """ |
| |
| from __future__ import print_function |
| |
| import argparse |
| import glob |
| import io |
| import json |
| import os |
| import pipes |
| import platform |
| import re |
| import shutil |
| import subprocess |
| import sys |
| import tempfile |
| |
| from update import (CDS_URL, CHROMIUM_DIR, CLANG_REVISION, LLVM_BUILD_DIR, |
| FORCE_HEAD_REVISION_FILE, PACKAGE_VERSION, RELEASE_VERSION, |
| STAMP_FILE, THIS_DIR, DownloadUrl, DownloadAndUnpack, |
| DownloadAndUnpackPackage, EnsureDirExists, GetDefaultHostOs, |
| ReadStampFile, RmTree, WriteStampFile) |
| |
| # Path constants. (All of these should be absolute paths.) |
| THIRD_PARTY_DIR = os.path.join(CHROMIUM_DIR, 'third_party') |
| LLVM_DIR = os.path.join(THIRD_PARTY_DIR, 'llvm') |
| COMPILER_RT_DIR = os.path.join(LLVM_DIR, 'compiler-rt') |
| 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_INSTRUMENTED_DIR = os.path.join(THIRD_PARTY_DIR, 'llvm-instrumented') |
| LLVM_PROFDATA_FILE = os.path.join(LLVM_INSTRUMENTED_DIR, 'profdata.prof') |
| LLVM_BUILD_TOOLS_DIR = os.path.abspath( |
| os.path.join(LLVM_DIR, '..', 'llvm-build-tools')) |
| ANDROID_NDK_DIR = os.path.join( |
| CHROMIUM_DIR, 'third_party', 'android_ndk') |
| FUCHSIA_SDK_DIR = os.path.join(CHROMIUM_DIR, 'third_party', 'fuchsia-sdk', |
| 'sdk') |
| PINNED_CLANG_DIR = os.path.join(LLVM_BUILD_TOOLS_DIR, 'pinned-clang') |
| |
| BUG_REPORT_URL = ('https://crbug.com and run' |
| ' tools/clang/scripts/process_crashreports.py' |
| ' (only works inside Google) which will upload a report') |
| |
| win_sdk_dir = None |
| def GetWinSDKDir(): |
| """Get the location of the current SDK.""" |
| global win_sdk_dir |
| if win_sdk_dir: |
| return win_sdk_dir |
| |
| # Don't let vs_toolchain overwrite our environment. |
| environ_bak = os.environ |
| |
| sys.path.append(os.path.join(CHROMIUM_DIR, 'build')) |
| import vs_toolchain |
| win_sdk_dir = vs_toolchain.SetEnvironmentAndGetSDKDir() |
| msvs_version = vs_toolchain.GetVisualStudioVersion() |
| |
| if bool(int(os.environ.get('DEPOT_TOOLS_WIN_TOOLCHAIN', '1'))): |
| dia_path = os.path.join(win_sdk_dir, '..', 'DIA SDK', 'bin', 'amd64') |
| else: |
| if 'GYP_MSVS_OVERRIDE_PATH' not in os.environ: |
| vs_path = vs_toolchain.DetectVisualStudioPath() |
| else: |
| vs_path = os.environ['GYP_MSVS_OVERRIDE_PATH'] |
| dia_path = os.path.join(vs_path, 'DIA SDK', 'bin', 'amd64') |
| |
| os.environ = environ_bak |
| return win_sdk_dir |
| |
| |
| 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 = [os.path.join(GetWinSDKDir(), 'bin', 'SetEnv.cmd'), |
| "/" + 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): |
| """Copy the files from directory src to dst.""" |
| dst = os.path.realpath(dst) # realpath() in case dst ends in /.. |
| EnsureDirExists(dst) |
| for f in os.listdir(src): |
| CopyFile(os.path.join(src, f), dst) |
| |
| |
| def CheckoutLLVM(commit, dir): |
| """Checkout the LLVM monorepo at a certain git commit in dir. Any local |
| modifications in dir will be lost.""" |
| |
| print('Checking out LLVM monorepo %s into %s' % (commit, dir)) |
| |
| # Try updating the current repo if it exists and has no local diff. |
| if os.path.isdir(dir): |
| os.chdir(dir) |
| # git diff-index --quiet returns success when there is no diff. |
| # Also check that the first commit is reachable. |
| if (RunCommand(['git', 'diff-index', '--quiet', 'HEAD'], fail_hard=False) |
| and RunCommand(['git', 'fetch'], fail_hard=False) |
| and RunCommand(['git', 'checkout', commit], fail_hard=False)): |
| return |
| |
| # If we can't use the current repo, delete it. |
| os.chdir(CHROMIUM_DIR) # Can't remove dir if we're in it. |
| print('Removing %s.' % dir) |
| RmTree(dir) |
| |
| clone_cmd = [ |
| 'git', 'clone', 'https://chromium.googlesource.com/external/' + |
| 'github.com/llvm/llvm-project', dir |
| ] |
| |
| if RunCommand(clone_cmd, fail_hard=False): |
| os.chdir(dir) |
| if RunCommand(['git', 'checkout', commit], fail_hard=False): |
| return |
| |
| print('CheckoutLLVM failed.') |
| sys.exit(1) |
| |
| |
| def UrlOpen(url): |
| # TODO(crbug.com/1067752): Use urllib once certificates are fixed. |
| return subprocess.check_output(['curl', '--silent', url], |
| universal_newlines=True) |
| |
| |
| def GetLatestLLVMCommit(): |
| """Get the latest commit hash in the LLVM monorepo.""" |
| main = json.loads( |
| UrlOpen('https://chromium.googlesource.com/external/' + |
| 'github.com/llvm/llvm-project/' + |
| '+/refs/heads/main?format=JSON').replace(")]}'", "")) |
| return main['commit'] |
| |
| |
| def GetCommitDescription(commit): |
| """Get the output of `git describe`. |
| |
| Needs to be called from inside the git repository dir.""" |
| git_exe = 'git.bat' if sys.platform.startswith('win') else 'git' |
| return subprocess.check_output( |
| [git_exe, 'describe', '--long', '--abbrev=8', commit], |
| universal_newlines=True).rstrip() |
| |
| |
| def AddCMakeToPath(args): |
| """Download CMake and add it to PATH.""" |
| if args.use_system_cmake: |
| return |
| |
| if sys.platform == 'win32': |
| zip_name = 'cmake-3.23.0-windows-x86_64.zip' |
| dir_name = ['cmake-3.23.0-windows-x86_64', 'bin'] |
| elif sys.platform == 'darwin': |
| zip_name = 'cmake-3.23.0-macos-universal.tar.gz' |
| dir_name = ['cmake-3.23.0-macos-universal', 'CMake.app', 'Contents', 'bin'] |
| else: |
| zip_name = 'cmake-3.23.0-linux-x86_64.tar.gz' |
| dir_name = ['cmake-3.23.0-linux-x86_64', 'bin'] |
| |
| cmake_dir = os.path.join(LLVM_BUILD_TOOLS_DIR, *dir_name) |
| 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 = '14' |
| 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', '') |
| |
| # find.exe, mv.exe and rm.exe are from MSYS (see crrev.com/389632). MSYS uses |
| # Cygwin under the hood, and initializing Cygwin has a race-condition when |
| # getting group and user data from the Active Directory is slow. To work |
| # around this, use a horrible hack telling it not to do that. |
| # See https://crbug.com/905289 |
| etc = os.path.join(gnuwin_dir, '..', '..', 'etc') |
| EnsureDirExists(etc) |
| with open(os.path.join(etc, 'nsswitch.conf'), 'w') as f: |
| f.write('passwd: files\n') |
| f.write('group: files\n') |
| |
| |
| def AddZlibToPath(): |
| """Download and build zlib, and add to PATH.""" |
| zlib_dir = os.path.join(LLVM_BUILD_TOOLS_DIR, 'zlib-1.2.11') |
| if os.path.exists(zlib_dir): |
| RmTree(zlib_dir) |
| zip_name = 'zlib-1.2.11.tar.gz' |
| DownloadAndUnpack(CDS_URL + '/tools/' + zip_name, LLVM_BUILD_TOOLS_DIR) |
| os.chdir(zlib_dir) |
| zlib_files = [ |
| 'adler32', 'compress', 'crc32', 'deflate', 'gzclose', 'gzlib', 'gzread', |
| 'gzwrite', 'inflate', 'infback', 'inftrees', 'inffast', 'trees', |
| 'uncompr', 'zutil' |
| ] |
| cl_flags = [ |
| '/nologo', '/O2', '/DZLIB_DLL', '/c', '/D_CRT_SECURE_NO_DEPRECATE', |
| '/D_CRT_NONSTDC_NO_DEPRECATE' |
| ] |
| RunCommand( |
| ['cl.exe'] + [f + '.c' for f in zlib_files] + cl_flags, msvc_arch='x64') |
| RunCommand( |
| ['lib.exe'] + [f + '.obj' |
| for f in zlib_files] + ['/nologo', '/out:zlib.lib'], |
| msvc_arch='x64') |
| # Remove the test directory so it isn't found when trying to find |
| # test.exe. |
| shutil.rmtree('test') |
| |
| os.environ['PATH'] = zlib_dir + os.pathsep + os.environ.get('PATH', '') |
| return zlib_dir |
| |
| |
| def BuildLibXml2(): |
| """Download and build libxml2""" |
| # The .tar.gz on GCS was uploaded as follows. |
| # The gitlab page has more up-to-date packages than http://xmlsoft.org/, |
| # and the official releases on xmlsoft.org are only available over ftp too. |
| # $ VER=v2.9.12 |
| # $ curl -O \ |
| # https://gitlab.gnome.org/GNOME/libxml2/-/archive/$VER/libxml2-$VER.tar.gz |
| # $ gsutil cp -n -a public-read libxml2-$VER.tar.gz \ |
| # gs://chromium-browser-clang/tools |
| |
| libxml2_version = 'libxml2-v2.9.12' |
| libxml2_dir = os.path.join(LLVM_BUILD_TOOLS_DIR, libxml2_version) |
| if os.path.exists(libxml2_dir): |
| RmTree(libxml2_dir) |
| zip_name = libxml2_version + '.tar.gz' |
| DownloadAndUnpack(CDS_URL + '/tools/' + zip_name, LLVM_BUILD_TOOLS_DIR) |
| os.chdir(libxml2_dir) |
| os.mkdir('build') |
| os.chdir('build') |
| |
| libxml2_install_dir = os.path.join(libxml2_dir, 'build', 'install') |
| |
| # Disable everything except WITH_TREE and WITH_OUTPUT, both needed by LLVM's |
| # WindowsManifestMerger. |
| # Also enable WITH_THREADS, else libxml doesn't compile on Linux. |
| RunCommand( |
| [ |
| 'cmake', |
| '-GNinja', |
| '-DCMAKE_BUILD_TYPE=Release', |
| '-DCMAKE_INSTALL_PREFIX=install', |
| # The mac_arm bot builds a clang arm binary, but currently on an intel |
| # host. If we ever move it to run on an arm mac, this can go. We |
| # could pass this only if args.build_mac_arm, but libxml is small, so |
| # might as well build it universal always for a few years. |
| '-DCMAKE_OSX_ARCHITECTURES=arm64;x86_64', |
| '-DCMAKE_MSVC_RUNTIME_LIBRARY=MultiThreaded', # /MT to match LLVM. |
| '-DBUILD_SHARED_LIBS=OFF', |
| '-DLIBXML2_WITH_C14N=OFF', |
| '-DLIBXML2_WITH_CATALOG=OFF', |
| '-DLIBXML2_WITH_DEBUG=OFF', |
| '-DLIBXML2_WITH_DOCB=OFF', |
| '-DLIBXML2_WITH_FTP=OFF', |
| '-DLIBXML2_WITH_HTML=OFF', |
| '-DLIBXML2_WITH_HTTP=OFF', |
| '-DLIBXML2_WITH_ICONV=OFF', |
| '-DLIBXML2_WITH_ICU=OFF', |
| '-DLIBXML2_WITH_ISO8859X=OFF', |
| '-DLIBXML2_WITH_LEGACY=OFF', |
| '-DLIBXML2_WITH_LZMA=OFF', |
| '-DLIBXML2_WITH_MEM_DEBUG=OFF', |
| '-DLIBXML2_WITH_MODULES=OFF', |
| '-DLIBXML2_WITH_OUTPUT=ON', |
| '-DLIBXML2_WITH_PATTERN=OFF', |
| '-DLIBXML2_WITH_PROGRAMS=OFF', |
| '-DLIBXML2_WITH_PUSH=OFF', |
| '-DLIBXML2_WITH_PYTHON=OFF', |
| '-DLIBXML2_WITH_READER=OFF', |
| '-DLIBXML2_WITH_REGEXPS=OFF', |
| '-DLIBXML2_WITH_RUN_DEBUG=OFF', |
| '-DLIBXML2_WITH_SAX1=OFF', |
| '-DLIBXML2_WITH_SCHEMAS=OFF', |
| '-DLIBXML2_WITH_SCHEMATRON=OFF', |
| '-DLIBXML2_WITH_TESTS=OFF', |
| '-DLIBXML2_WITH_THREADS=ON', |
| '-DLIBXML2_WITH_THREAD_ALLOC=OFF', |
| '-DLIBXML2_WITH_TREE=ON', |
| '-DLIBXML2_WITH_VALID=OFF', |
| '-DLIBXML2_WITH_WRITER=OFF', |
| '-DLIBXML2_WITH_XINCLUDE=OFF', |
| '-DLIBXML2_WITH_XPATH=OFF', |
| '-DLIBXML2_WITH_XPTR=OFF', |
| '-DLIBXML2_WITH_ZLIB=OFF', |
| '..', |
| ], |
| msvc_arch='x64') |
| RunCommand(['ninja', 'install'], msvc_arch='x64') |
| |
| libxml2_include_dir = os.path.join(libxml2_install_dir, 'include', 'libxml2') |
| if sys.platform == 'win32': |
| libxml2_lib = os.path.join(libxml2_install_dir, 'lib', 'libxml2s.lib') |
| else: |
| libxml2_lib = os.path.join(libxml2_install_dir, 'lib', 'libxml2.a') |
| extra_cmake_flags = [ |
| '-DLLVM_ENABLE_LIBXML2=FORCE_ON', |
| '-DLIBXML2_INCLUDE_DIR=' + libxml2_include_dir.replace('\\', '/'), |
| '-DLIBXML2_LIBRARIES=' + libxml2_lib.replace('\\', '/'), |
| ] |
| extra_cflags = ['-DLIBXML_STATIC'] |
| |
| return extra_cmake_flags, extra_cflags |
| |
| |
| def DownloadRPMalloc(): |
| """Download rpmalloc.""" |
| rpmalloc_dir = os.path.join(LLVM_BUILD_TOOLS_DIR, 'rpmalloc') |
| if os.path.exists(rpmalloc_dir): |
| RmTree(rpmalloc_dir) |
| |
| # Using rpmalloc bc1923f rather than the latest release (1.4.1) because |
| # it contains the fix for https://github.com/mjansson/rpmalloc/pull/186 |
| # which would cause lld to deadlock. |
| # The zip file was created and uploaded as follows: |
| # $ mkdir rpmalloc |
| # $ curl -L https://github.com/mjansson/rpmalloc/archive/bc1923f436539327707b08ef9751a7a87bdd9d2f.tar.gz \ |
| # | tar -C rpmalloc --strip-components=1 -xzf - |
| # $ GZIP=-9 tar vzcf rpmalloc-bc1923f.tgz rpmalloc |
| # $ gsutil.py cp -n -a public-read rpmalloc-bc1923f.tgz \ |
| # gs://chromium-browser-clang/tools/ |
| zip_name = 'rpmalloc-bc1923f.tgz' |
| DownloadAndUnpack(CDS_URL + '/tools/' + zip_name, LLVM_BUILD_TOOLS_DIR) |
| rpmalloc_dir = rpmalloc_dir.replace('\\', '/') |
| return rpmalloc_dir |
| |
| |
| def DownloadPinnedClang(): |
| PINNED_CLANG_VERSION = 'llvmorg-16-init-572-gdde41c6c-3' |
| DownloadAndUnpackPackage('clang', PINNED_CLANG_DIR, GetDefaultHostOs(), |
| PINNED_CLANG_VERSION) |
| |
| |
| # TODO(crbug.com/929645): Remove once we don't need gcc's libstdc++. |
| def MaybeDownloadHostGcc(args): |
| """Download a modern GCC host compiler on Linux.""" |
| assert sys.platform.startswith('linux') |
| if args.gcc_toolchain: |
| return |
| gcc_dir = os.path.join(LLVM_BUILD_TOOLS_DIR, 'gcc-10.2.0-bionic') |
| if os.path.isdir(gcc_dir): |
| RmTree(gcc_dir) # TODO(thakis): Remove this branch after a few weeks. |
| if not os.path.exists(gcc_dir): |
| DownloadAndUnpack(CDS_URL + '/tools/gcc-10.2.0-bionic.tgz', gcc_dir) |
| args.gcc_toolchain = gcc_dir |
| |
| |
| def VerifyVersionOfBuiltClangMatchesVERSION(): |
| """Checks that `clang --version` outputs RELEASE_VERSION. If this |
| fails, update.RELEASE_VERSION is out-of-date and needs to be updated (possibly |
| in an `if args.llvm_force_head_revision:` block inupdate. main() first).""" |
| clang = os.path.join(LLVM_BUILD_DIR, 'bin', 'clang') |
| if sys.platform == 'win32': |
| clang += '-cl.exe' |
| version_out = subprocess.check_output([clang, '--version'], |
| universal_newlines=True) |
| version_out = re.match(r'clang version ([0-9.]+)', version_out).group(1) |
| if version_out != RELEASE_VERSION: |
| print(('unexpected clang version %s (not %s), ' |
| 'update RELEASE_VERSION in update.py') |
| % (version_out, RELEASE_VERSION)) |
| sys.exit(1) |
| |
| |
| def VerifyZlibSupport(): |
| """Check that clang was built with zlib support enabled.""" |
| clang = os.path.join(LLVM_BUILD_DIR, 'bin', 'clang') |
| test_file = '/dev/null' |
| if sys.platform == 'win32': |
| clang += '.exe' |
| test_file = 'nul' |
| |
| print('Checking for zlib support') |
| clang_out = subprocess.check_output([ |
| clang, '-target', 'x86_64-unknown-linux-gnu', '-gz', '-c', '-###', '-x', |
| 'c', test_file |
| ], |
| stderr=subprocess.STDOUT, |
| universal_newlines=True) |
| if (re.search(r'--compress-debug-sections', clang_out)): |
| print('OK') |
| else: |
| print(('Failed to detect zlib support!\n\n(driver output: %s)') % clang_out) |
| sys.exit(1) |
| |
| |
| # TODO(https://crbug.com/1286289): remove once Chrome targets don't rely on |
| # libstdc++.so existing in the clang package. |
| def CopyLibstdcpp(args, build_dir): |
| if not args.gcc_toolchain: |
| return |
| # Find libstdc++.so.6 |
| libstdcpp = subprocess.check_output([ |
| os.path.join(args.gcc_toolchain, 'bin', 'g++'), |
| '-print-file-name=libstdc++.so.6' |
| ], |
| universal_newlines=True).rstrip() |
| |
| EnsureDirExists(os.path.join(build_dir, 'lib')) |
| CopyFile(libstdcpp, os.path.join(build_dir, 'lib')) |
| |
| |
| def compiler_rt_cmake_flags(*, sanitizers, profile): |
| # Don't set -DCOMPILER_RT_BUILD_BUILTINS=ON/OFF as it interferes with the |
| # runtimes logic of building builtins. |
| args = [ |
| # Build crtbegin/crtend. It's just two tiny TUs, so just enable this |
| # everywhere, even though we only need it on Linux. |
| 'COMPILER_RT_BUILD_CRT=ON', |
| 'COMPILER_RT_BUILD_LIBFUZZER=OFF', |
| 'COMPILER_RT_BUILD_MEMPROF=OFF', |
| 'COMPILER_RT_BUILD_ORC=OFF', |
| 'COMPILER_RT_BUILD_PROFILE=' + ('ON' if profile else 'OFF'), |
| 'COMPILER_RT_BUILD_SANITIZERS=' + ('ON' if sanitizers else 'OFF'), |
| 'COMPILER_RT_BUILD_XRAY=OFF', |
| # See crbug.com/1205046: don't build scudo (and others we don't need). |
| 'COMPILER_RT_SANITIZERS_TO_BUILD=asan;dfsan;msan;hwasan;tsan;cfi', |
| # We explicitly list all targets we want to build, do not autodetect |
| # targets. |
| 'COMPILER_RT_DEFAULT_TARGET_ONLY=ON', |
| ] |
| return args |
| |
| |
| def gn_arg(v): |
| if v == 'True': |
| return True |
| if v == 'False': |
| return False |
| raise argparse.ArgumentTypeError('Expected one of %r or %r' % ( |
| 'True', 'False')) |
| |
| |
| 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('--build-mac-arm', action='store_true', |
| help='Build arm binaries. Only valid on macOS.') |
| parser.add_argument('--disable-asserts', action='store_true', |
| help='build with asserts disabled') |
| parser.add_argument('--host-cc', |
| help='build with host C compiler, requires --host-cxx as ' |
| 'well') |
| parser.add_argument('--host-cxx', |
| help='build with host C++ compiler, requires --host-cc ' |
| 'as well') |
| parser.add_argument('--gcc-toolchain', help='what gcc toolchain to use for ' |
| 'building; --gcc-toolchain=/opt/foo picks ' |
| '/opt/foo/bin/gcc') |
| parser.add_argument('--pgo', action='store_true', help='build with PGO') |
| parser.add_argument('--thinlto', |
| action='store_true', |
| help='build with ThinLTO') |
| parser.add_argument('--llvm-force-head-revision', action='store_true', |
| help='build the latest revision') |
| parser.add_argument('--run-tests', action='store_true', |
| help='run tests after building') |
| parser.add_argument('--skip-build', action='store_true', |
| help='do not build anything') |
| parser.add_argument('--skip-checkout', action='store_true', |
| help='do not create or update any checkouts') |
| parser.add_argument('--build-dir', |
| help='Override build directory') |
| parser.add_argument('--extra-tools', nargs='*', default=[], |
| help='select additional chrome tools to build') |
| parser.add_argument('--use-system-cmake', action='store_true', |
| help='use the cmake from PATH instead of downloading ' |
| 'and using prebuilt cmake binaries') |
| parser.add_argument('--with-android', type=gn_arg, nargs='?', const=True, |
| help='build the Android ASan runtime (linux only)', |
| default=sys.platform.startswith('linux')) |
| parser.add_argument('--with-fuchsia', |
| type=gn_arg, |
| nargs='?', |
| const=True, |
| help='build the Fuchsia runtimes (linux and mac only)', |
| default=sys.platform.startswith('linux') |
| or sys.platform.startswith('darwin')) |
| parser.add_argument('--without-android', action='store_false', |
| help='don\'t build Android ASan runtime (linux only)', |
| dest='with_android') |
| parser.add_argument('--without-fuchsia', action='store_false', |
| help='don\'t build Fuchsia clang_rt runtime (linux/mac)', |
| dest='with_fuchsia', |
| default=sys.platform in ('linux2', 'darwin')) |
| args = parser.parse_args() |
| |
| global CLANG_REVISION, PACKAGE_VERSION, LLVM_BUILD_DIR |
| |
| if (args.pgo or args.thinlto) and not args.bootstrap: |
| print('--pgo/--thinlto requires --bootstrap') |
| 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 |
| |
| if args.with_fuchsia and not os.path.exists(FUCHSIA_SDK_DIR): |
| print('Fuchsia SDK not found at ' + FUCHSIA_SDK_DIR) |
| print('The Fuchsia SDK is needed to build libclang_rt for Fuchsia.') |
| print('Install the Fuchsia SDK by adding fuchsia to the ') |
| print('target_os section in your .gclient and running hooks, ') |
| print('or pass --without-fuchsia.') |
| print( |
| 'https://chromium.googlesource.com/chromium/src/+/main/docs/fuchsia/build_instructions.md' |
| ) |
| print('for general Fuchsia build instructions.') |
| return 1 |
| |
| if args.build_mac_arm and sys.platform != 'darwin': |
| print('--build-mac-arm only valid on macOS') |
| return 1 |
| if args.build_mac_arm and platform.machine() == 'arm64': |
| print('--build-mac-arm only valid on intel to cross-build arm') |
| return 1 |
| |
| # Don't buffer stdout, so that print statements are immediately flushed. |
| # LLVM tests print output without newlines, so with buffering they won't be |
| # immediately printed. |
| major, _, _, _, _ = sys.version_info |
| if major == 3: |
| # Python3 only allows unbuffered output for binary streams. This |
| # workaround comes from https://stackoverflow.com/a/181654/4052492. |
| sys.stdout = io.TextIOWrapper(open(sys.stdout.fileno(), 'wb', 0), |
| write_through=True) |
| else: |
| sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 0) |
| |
| # The gnuwin package also includes curl, which is needed to interact with the |
| # github API below. |
| # TODO(crbug.com/1067752): Use urllib once certificates are fixed, and |
| # move this down to where we fetch other build tools. |
| AddGnuWinToPath() |
| |
| |
| if args.build_dir: |
| LLVM_BUILD_DIR = args.build_dir |
| |
| if args.llvm_force_head_revision: |
| checkout_revision = GetLatestLLVMCommit() |
| else: |
| checkout_revision = CLANG_REVISION |
| |
| if not args.skip_checkout: |
| CheckoutLLVM(checkout_revision, LLVM_DIR) |
| |
| if args.llvm_force_head_revision: |
| CLANG_REVISION = GetCommitDescription(checkout_revision) |
| PACKAGE_VERSION = '%s-0' % CLANG_REVISION |
| |
| print('Locally building clang %s...' % PACKAGE_VERSION) |
| WriteStampFile('', STAMP_FILE) |
| WriteStampFile('', FORCE_HEAD_REVISION_FILE) |
| |
| AddCMakeToPath(args) |
| |
| |
| if args.skip_build: |
| return 0 |
| |
| # The variable "lld" is only used on Windows because only there does setting |
| # CMAKE_LINKER have an effect: On Windows, the linker is called directly, |
| # while elsewhere it's called through the compiler driver, and we pass |
| # -fuse-ld=lld there to make the compiler driver call the linker (by setting |
| # LLVM_ENABLE_LLD). |
| cc, cxx, lld = None, None, None |
| |
| cflags = [] |
| cxxflags = [] |
| ldflags = [] |
| |
| targets = 'AArch64;ARM;Mips;PowerPC;RISCV;SystemZ;WebAssembly;X86' |
| |
| projects = 'clang;lld;clang-tools-extra' |
| runtimes = 'compiler-rt' |
| |
| base_cmake_args = [ |
| '-GNinja', |
| '-DCMAKE_BUILD_TYPE=Release', |
| '-DLLVM_ENABLE_ASSERTIONS=%s' % ('OFF' if args.disable_asserts else 'ON'), |
| '-DLLVM_ENABLE_PROJECTS=' + projects, |
| '-DLLVM_ENABLE_RUNTIMES=' + runtimes, |
| '-DLLVM_TARGETS_TO_BUILD=' + targets, |
| # PIC needed for Rust build (links LLVM into shared object) |
| '-DLLVM_ENABLE_PIC=ON', |
| '-DLLVM_ENABLE_UNWIND_TABLES=OFF', |
| '-DLLVM_ENABLE_TERMINFO=OFF', |
| '-DLLVM_ENABLE_Z3_SOLVER=OFF', |
| '-DCLANG_PLUGIN_SUPPORT=OFF', |
| '-DCLANG_ENABLE_STATIC_ANALYZER=OFF', |
| '-DCLANG_ENABLE_ARCMT=OFF', |
| '-DBUG_REPORT_URL=' + BUG_REPORT_URL, |
| # Don't run Go bindings tests; PGO makes them confused. |
| '-DLLVM_INCLUDE_GO_TESTS=OFF', |
| # See crbug.com/1126219: Use native symbolizer instead of DIA |
| '-DLLVM_ENABLE_DIA_SDK=OFF', |
| # The default value differs per platform, force it off everywhere. |
| '-DLLVM_ENABLE_PER_TARGET_RUNTIME_DIR=OFF', |
| # Don't use curl. |
| '-DLLVM_ENABLE_CURL=OFF', |
| # Build libclang.a as well as libclang.so |
| '-DLIBCLANG_BUILD_STATIC=ON', |
| ] |
| |
| if sys.platform == 'darwin': |
| isysroot = subprocess.check_output(['xcrun', '--show-sdk-path'], |
| universal_newlines=True).rstrip() |
| |
| # See https://crbug.com/1302636#c49 - #c56 -- intercepting crypt_r() does not |
| # work with the sysroot for not fully understood reasons. Disable it. |
| sanitizers_override = [ |
| '-DSANITIZER_OVERRIDE_INTERCEPTORS', |
| '-I' + os.path.join(THIS_DIR, 'sanitizers'), |
| ] |
| cflags += sanitizers_override |
| cxxflags += sanitizers_override |
| |
| if args.host_cc or args.host_cxx: |
| assert args.host_cc and args.host_cxx, \ |
| "--host-cc and --host-cxx need to be used together" |
| cc = args.host_cc |
| cxx = args.host_cxx |
| else: |
| DownloadPinnedClang() |
| if sys.platform == 'win32': |
| cc = os.path.join(PINNED_CLANG_DIR, 'bin', 'clang-cl.exe') |
| cxx = os.path.join(PINNED_CLANG_DIR, 'bin', 'clang-cl.exe') |
| lld = os.path.join(PINNED_CLANG_DIR, 'bin', 'lld-link.exe') |
| # CMake has a hard time with backslashes in compiler paths: |
| # https://stackoverflow.com/questions/13050827 |
| cc = cc.replace('\\', '/') |
| cxx = cxx.replace('\\', '/') |
| lld = lld.replace('\\', '/') |
| else: |
| cc = os.path.join(PINNED_CLANG_DIR, 'bin', 'clang') |
| cxx = os.path.join(PINNED_CLANG_DIR, 'bin', 'clang++') |
| |
| if sys.platform.startswith('linux'): |
| MaybeDownloadHostGcc(args) |
| base_cmake_args += [ '-DLLVM_STATIC_LINK_CXX_STDLIB=ON' ] |
| |
| if sys.platform != 'darwin': |
| # The host clang has lld, but self-hosting with lld is still slightly |
| # broken on mac. |
| # TODO: check if this works now. |
| base_cmake_args.append('-DLLVM_ENABLE_LLD=ON') |
| |
| if sys.platform.startswith('linux'): |
| # Download sysroots. This uses basically Chromium's sysroots, but with |
| # minor changes: |
| # - glibc version bumped to 2.18 to make __cxa_thread_atexit_impl |
| # work (clang can require 2.18; chromium currently doesn't) |
| # - libcrypt.so.1 reversioned so that crypt() is picked up from glibc |
| # The sysroot was built at |
| # https://chromium-review.googlesource.com/c/chromium/src/+/3684954/1 |
| # and the hashes here are from sysroots.json in that CL. |
| toolchain_bucket = 'https://commondatastorage.googleapis.com/chrome-linux-sysroot/toolchain/' |
| |
| # amd64 |
| # hash from https://chromium-review.googlesource.com/c/chromium/src/+/3684954/1/build/linux/sysroot_scripts/sysroots.json#3 |
| toolchain_hash = '2028cdaf24259d23adcff95393b8cc4f0eef714b' |
| toolchain_name = 'debian_bullseye_amd64_sysroot' |
| U = toolchain_bucket + toolchain_hash + '/' + toolchain_name + '.tar.xz' |
| sysroot_amd64 = os.path.join(LLVM_BUILD_TOOLS_DIR, toolchain_name) |
| DownloadAndUnpack(U, sysroot_amd64) |
| |
| # i386 |
| # hash from https://chromium-review.googlesource.com/c/chromium/src/+/3684954/1/build/linux/sysroot_scripts/sysroots.json#23 |
| toolchain_hash = 'a033618b5e092c86e96d62d3c43f7363df6cebe7' |
| toolchain_name = 'debian_bullseye_i386_sysroot' |
| U = toolchain_bucket + toolchain_hash + '/' + toolchain_name + '.tar.xz' |
| sysroot_i386 = os.path.join(LLVM_BUILD_TOOLS_DIR, toolchain_name) |
| DownloadAndUnpack(U, sysroot_i386) |
| |
| # arm |
| # hash from https://chromium-review.googlesource.com/c/chromium/src/+/3684954/1/build/linux/sysroot_scripts/sysroots.json#8 |
| toolchain_hash = '0b9a3c54d2d5f6b1a428369aaa8d7ba7b227f701' |
| toolchain_name = 'debian_bullseye_arm_sysroot' |
| U = toolchain_bucket + toolchain_hash + '/' + toolchain_name + '.tar.xz' |
| sysroot_arm = os.path.join(LLVM_BUILD_TOOLS_DIR, toolchain_name) |
| DownloadAndUnpack(U, sysroot_arm) |
| |
| # arm64 |
| # hash from https://chromium-review.googlesource.com/c/chromium/src/+/3684954/1/build/linux/sysroot_scripts/sysroots.json#12 |
| toolchain_hash = '0e28d9832614729bb5b731161ff96cb4d516f345' |
| toolchain_name = 'debian_bullseye_arm64_sysroot' |
| U = toolchain_bucket + toolchain_hash + '/' + toolchain_name + '.tar.xz' |
| sysroot_arm64 = os.path.join(LLVM_BUILD_TOOLS_DIR, toolchain_name) |
| DownloadAndUnpack(U, sysroot_arm64) |
| |
| # Add the sysroot to base_cmake_args. |
| if platform.machine() == 'aarch64': |
| base_cmake_args.append('-DCMAKE_SYSROOT=' + sysroot_arm64) |
| else: |
| # amd64 is the default toolchain. |
| base_cmake_args.append('-DCMAKE_SYSROOT=' + sysroot_amd64) |
| |
| if sys.platform == 'win32': |
| base_cmake_args.append('-DLLVM_USE_CRT_RELEASE=MT') |
| |
| # Require zlib compression. |
| zlib_dir = AddZlibToPath() |
| cflags.append('-I' + zlib_dir) |
| cxxflags.append('-I' + zlib_dir) |
| ldflags.append('-LIBPATH:' + zlib_dir) |
| |
| # Use rpmalloc. For faster ThinLTO linking. |
| rpmalloc_dir = DownloadRPMalloc() |
| base_cmake_args.append('-DLLVM_INTEGRATED_CRT_ALLOC=' + rpmalloc_dir) |
| |
| # Statically link libxml2 to make lld-link not require mt.exe on Windows, |
| # and to make sure lld-link output on other platforms is identical to |
| # lld-link on Windows (for cross-builds). |
| libxml_cmake_args, libxml_cflags = BuildLibXml2() |
| base_cmake_args += libxml_cmake_args |
| cflags += libxml_cflags |
| cxxflags += libxml_cflags |
| |
| if args.bootstrap: |
| print('Building bootstrap compiler') |
| if os.path.exists(LLVM_BOOTSTRAP_DIR): |
| RmTree(LLVM_BOOTSTRAP_DIR) |
| EnsureDirExists(LLVM_BOOTSTRAP_DIR) |
| os.chdir(LLVM_BOOTSTRAP_DIR) |
| |
| projects = 'clang' |
| runtimes = '' |
| if args.pgo or sys.platform == 'darwin': |
| # Need libclang_rt.profile for PGO. |
| # On macOS, the bootstrap toolchain needs to have compiler-rt because |
| # dsymutil's link needs libclang_rt.osx.a. Only the x86_64 osx |
| # libraries are needed though, and only libclang_rt (i.e. |
| # COMPILER_RT_BUILD_BUILTINS). |
| runtimes += ';compiler-rt' |
| if sys.platform != 'darwin': |
| projects += ';lld' |
| |
| bootstrap_targets = 'X86' |
| if sys.platform == 'darwin': |
| # Need ARM and AArch64 for building the ios clang_rt. |
| bootstrap_targets += ';ARM;AArch64' |
| bootstrap_args = base_cmake_args + [ |
| '-DLLVM_TARGETS_TO_BUILD=' + bootstrap_targets, |
| '-DLLVM_ENABLE_PROJECTS=' + projects, |
| '-DLLVM_ENABLE_RUNTIMES=' + runtimes, |
| '-DCMAKE_INSTALL_PREFIX=' + LLVM_BOOTSTRAP_INSTALL_DIR, |
| '-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), |
| # Ignore args.disable_asserts for the bootstrap compiler. |
| '-DLLVM_ENABLE_ASSERTIONS=ON', |
| ] |
| # PGO needs libclang_rt.profile but none of the other compiler-rt stuff. |
| bootstrap_args.extend([ |
| '-D' + f |
| for f in compiler_rt_cmake_flags(sanitizers=False, profile=args.pgo) |
| ]) |
| if sys.platform == 'darwin': |
| bootstrap_args.extend([ |
| '-DCOMPILER_RT_ENABLE_IOS=OFF', |
| '-DCOMPILER_RT_ENABLE_WATCHOS=OFF', |
| '-DCOMPILER_RT_ENABLE_TVOS=OFF', |
| ]) |
| if platform.machine() == 'arm64': |
| bootstrap_args.extend(['-DDARWIN_osx_ARCHS=arm64']) |
| else: |
| bootstrap_args.extend(['-DDARWIN_osx_ARCHS=x86_64']) |
| |
| if cc is not None: bootstrap_args.append('-DCMAKE_C_COMPILER=' + cc) |
| if cxx is not None: bootstrap_args.append('-DCMAKE_CXX_COMPILER=' + cxx) |
| if lld is not None: bootstrap_args.append('-DCMAKE_LINKER=' + lld) |
| RunCommand(['cmake'] + bootstrap_args + [os.path.join(LLVM_DIR, 'llvm')], |
| msvc_arch='x64') |
| RunCommand(['ninja'], msvc_arch='x64') |
| if args.run_tests: |
| RunCommand(['ninja', 'check-all'], msvc_arch='x64') |
| RunCommand(['ninja', 'install'], msvc_arch='x64') |
| |
| 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') |
| lld = os.path.join(LLVM_BOOTSTRAP_INSTALL_DIR, 'bin', 'lld-link.exe') |
| # CMake has a hard time with backslashes in compiler paths: |
| # https://stackoverflow.com/questions/13050827 |
| cc = cc.replace('\\', '/') |
| cxx = cxx.replace('\\', '/') |
| lld = lld.replace('\\', '/') |
| else: |
| cc = os.path.join(LLVM_BOOTSTRAP_INSTALL_DIR, 'bin', 'clang') |
| cxx = os.path.join(LLVM_BOOTSTRAP_INSTALL_DIR, 'bin', 'clang++') |
| |
| print('Bootstrap compiler installed.') |
| |
| if args.pgo: |
| print('Building instrumented compiler') |
| if os.path.exists(LLVM_INSTRUMENTED_DIR): |
| RmTree(LLVM_INSTRUMENTED_DIR) |
| EnsureDirExists(LLVM_INSTRUMENTED_DIR) |
| os.chdir(LLVM_INSTRUMENTED_DIR) |
| |
| projects = 'clang' |
| |
| instrument_args = base_cmake_args + [ |
| '-DLLVM_ENABLE_PROJECTS=' + projects, |
| '-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), |
| # Build with instrumentation. |
| '-DLLVM_BUILD_INSTRUMENTED=IR', |
| ] |
| # Build with the bootstrap compiler. |
| if cc is not None: instrument_args.append('-DCMAKE_C_COMPILER=' + cc) |
| if cxx is not None: instrument_args.append('-DCMAKE_CXX_COMPILER=' + cxx) |
| if lld is not None: instrument_args.append('-DCMAKE_LINKER=' + lld) |
| |
| RunCommand(['cmake'] + instrument_args + [os.path.join(LLVM_DIR, 'llvm')], |
| msvc_arch='x64') |
| RunCommand(['ninja', 'clang'], msvc_arch='x64') |
| print('Instrumented compiler built.') |
| |
| # Train by building some C++ code. |
| # |
| # pgo_training-1.ii is a preprocessed (on Linux) version of |
| # src/third_party/blink/renderer/core/layout/layout_object.cc, selected |
| # because it's a large translation unit in Blink, which is normally the |
| # slowest part of Chromium to compile. Using this, we get ~20% shorter |
| # build times for Linux, Android, and Mac, which is also what we got when |
| # training by actually building a target in Chromium. (For comparison, a |
| # C++-y "Hello World" program only resulted in 14% faster builds.) |
| # See https://crbug.com/966403#c16 for all numbers. |
| # |
| # Although the training currently only exercises Clang, it does involve LLVM |
| # internals, and so LLD also benefits when used for ThinLTO links. |
| # |
| # NOTE: Tidy uses binaries built with this profile, but doesn't seem to |
| # gain much from it. If tidy's execution time becomes a concern, it might |
| # be good to investigate that. |
| # |
| # TODO(hans): Enhance the training, perhaps by including preprocessed code |
| # from more platforms, and by doing some linking so that lld can benefit |
| # from PGO as well. Perhaps the training could be done asynchronously by |
| # dedicated buildbots that upload profiles to the cloud. |
| training_source = 'pgo_training-1.ii' |
| with open(training_source, 'wb') as f: |
| DownloadUrl(CDS_URL + '/' + training_source, f) |
| train_cmd = [os.path.join(LLVM_INSTRUMENTED_DIR, 'bin', 'clang++'), |
| '-target', 'x86_64-unknown-unknown', '-O2', '-g', '-std=c++14', |
| '-fno-exceptions', '-fno-rtti', '-w', '-c', training_source] |
| if sys.platform == 'darwin': |
| train_cmd.extend(['-isysroot', isysroot]) |
| RunCommand(train_cmd, msvc_arch='x64') |
| |
| # Merge profiles. |
| profdata = os.path.join(LLVM_BOOTSTRAP_INSTALL_DIR, 'bin', 'llvm-profdata') |
| RunCommand([profdata, 'merge', '-output=' + LLVM_PROFDATA_FILE] + |
| glob.glob(os.path.join(LLVM_INSTRUMENTED_DIR, 'profiles', |
| '*.profraw')), msvc_arch='x64') |
| print('Profile generated.') |
| |
| deployment_target = '10.12' |
| |
| # 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 args.llvm_force_head_revision: |
| cflags += ['-DLLVM_FORCE_HEAD_REVISION'] |
| cxxflags += ['-DLLVM_FORCE_HEAD_REVISION'] |
| |
| # Build PDBs for archival on Windows. Don't use RelWithDebInfo since it |
| # has different optimization defaults than Release. |
| # Also disable stack cookies (/GS-) for performance. |
| if sys.platform == 'win32': |
| cflags += ['/Zi', '/GS-'] |
| cxxflags += ['/Zi', '/GS-'] |
| ldflags += ['/DEBUG', '/OPT:REF', '/OPT:ICF'] |
| |
| deployment_env = None |
| if deployment_target: |
| deployment_env = os.environ.copy() |
| deployment_env['MACOSX_DEPLOYMENT_TARGET'] = deployment_target |
| |
| print('Building final compiler.') |
| |
| default_tools = ['plugins', 'blink_gc_plugin', 'translation_unit'] |
| chrome_tools = list(set(default_tools + args.extra_tools)) |
| if cc is not None: base_cmake_args.append('-DCMAKE_C_COMPILER=' + cc) |
| if cxx is not None: base_cmake_args.append('-DCMAKE_CXX_COMPILER=' + cxx) |
| if lld is not None: base_cmake_args.append('-DCMAKE_LINKER=' + lld) |
| cmake_args = base_cmake_args + [ |
| '-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, |
| '-DLLVM_EXTERNAL_PROJECTS=chrometools', |
| '-DLLVM_EXTERNAL_CHROMETOOLS_SOURCE_DIR=' + |
| os.path.join(CHROMIUM_DIR, 'tools', 'clang'), |
| '-DCHROMIUM_TOOLS=%s' % ';'.join(chrome_tools)] |
| if args.pgo: |
| cmake_args.append('-DLLVM_PROFDATA_FILE=' + LLVM_PROFDATA_FILE) |
| if args.thinlto: |
| cmake_args.append('-DLLVM_ENABLE_LTO=Thin') |
| if sys.platform == 'win32': |
| cmake_args.append('-DLLVM_ENABLE_ZLIB=FORCE_ON') |
| |
| if args.build_mac_arm: |
| assert platform.machine() != 'arm64', 'build_mac_arm for cross build only' |
| cmake_args += [ |
| '-DCMAKE_OSX_ARCHITECTURES=arm64', '-DCMAKE_SYSTEM_NAME=Darwin' |
| ] |
| |
| # The default LLVM_DEFAULT_TARGET_TRIPLE depends on the host machine. |
| # Set it explicitly to make the build of clang more hermetic, and also to |
| # set it to arm64 when cross-building clang for mac/arm. |
| if sys.platform == 'darwin': |
| if args.build_mac_arm or platform.machine() == 'arm64': |
| cmake_args.append('-DLLVM_DEFAULT_TARGET_TRIPLE=arm64-apple-darwin') |
| else: |
| cmake_args.append('-DLLVM_DEFAULT_TARGET_TRIPLE=x86_64-apple-darwin') |
| elif sys.platform.startswith('linux'): |
| if platform.machine() == 'aarch64': |
| cmake_args.append( |
| '-DLLVM_DEFAULT_TARGET_TRIPLE=aarch64-unknown-linux-gnu') |
| elif platform.machine() == 'riscv64': |
| cmake_args.append( |
| '-DLLVM_DEFAULT_TARGET_TRIPLE=riscv64-unknown-linux-gnu') |
| else: |
| cmake_args.append('-DLLVM_DEFAULT_TARGET_TRIPLE=x86_64-unknown-linux-gnu') |
| cmake_args.append('-DLLVM_ENABLE_PER_TARGET_RUNTIME_DIR=ON') |
| elif sys.platform == 'win32': |
| cmake_args.append('-DLLVM_DEFAULT_TARGET_TRIPLE=x86_64-pc-windows-msvc') |
| |
| # List of (triple, list of CMake vars without '-D'). |
| runtimes_triples_args = [] |
| |
| if sys.platform.startswith('linux'): |
| runtimes_triples_args.append( |
| ('i386-unknown-linux-gnu', |
| compiler_rt_cmake_flags(sanitizers=True, profile=True) + [ |
| 'CMAKE_SYSROOT=%s' % sysroot_i386, |
| ])) |
| runtimes_triples_args.append( |
| ('x86_64-unknown-linux-gnu', |
| compiler_rt_cmake_flags(sanitizers=True, profile=True) + [ |
| 'CMAKE_SYSROOT=%s' % sysroot_amd64, |
| ])) |
| runtimes_triples_args.append( |
| # Using "armv7a-unknown-linux-gnueabhihf" confuses the compiler-rt |
| # builtins build, since compiler-rt/cmake/builtin-config-ix.cmake |
| # doesn't include "armv7a" in its `ARM32` list. |
| # TODO(thakis): It seems to work for everything else though, see try |
| # results on |
| # https://chromium-review.googlesource.com/c/chromium/src/+/3702739/4 |
| # Maybe it should work for builtins too? |
| ('armv7-unknown-linux-gnueabihf', |
| compiler_rt_cmake_flags(sanitizers=True, profile=True) + [ |
| 'CMAKE_SYSROOT=%s' % sysroot_arm, |
| ])) |
| runtimes_triples_args.append( |
| ('aarch64-unknown-linux-gnu', |
| compiler_rt_cmake_flags(sanitizers=True, profile=True) + [ |
| 'CMAKE_SYSROOT=%s' % sysroot_arm64, |
| ])) |
| elif sys.platform == 'win32': |
| runtimes_triples_args.append( |
| ('i386-pc-windows-msvc', |
| compiler_rt_cmake_flags(sanitizers=False, profile=True) + [ |
| 'LLVM_ENABLE_PER_TARGET_RUNTIME_DIR=OFF', |
| ])) |
| runtimes_triples_args.append( |
| ('x86_64-pc-windows-msvc', |
| compiler_rt_cmake_flags(sanitizers=True, profile=True) + [ |
| 'LLVM_ENABLE_PER_TARGET_RUNTIME_DIR=OFF', |
| ])) |
| elif sys.platform == 'darwin': |
| compiler_rt_args = [ |
| 'SANITIZER_MIN_OSX_VERSION=' + deployment_target, |
| 'COMPILER_RT_ENABLE_MACCATALYST=ON', |
| 'COMPILER_RT_ENABLE_IOS=ON', |
| 'COMPILER_RT_ENABLE_WATCHOS=OFF', |
| 'COMPILER_RT_ENABLE_TVOS=OFF', |
| 'DARWIN_ios_ARCHS=arm64', |
| 'DARWIN_iossim_ARCHS=arm64;x86_64', |
| 'DARWIN_osx_ARCHS=arm64;x86_64', |
| ] + compiler_rt_cmake_flags(sanitizers=True, profile=True) |
| # compiler-rt is built for all platforms/arches with a single |
| # configuration, we should only specify one target triple. 'default' is |
| # specially handled. |
| runtimes_triples_args.append(('default', compiler_rt_args)) |
| |
| if args.with_android: |
| toolchain_dir = ANDROID_NDK_DIR + '/toolchains/llvm/prebuilt/linux-x86_64' |
| for target_arch in ['aarch64', 'arm', 'i686', 'x86_64']: |
| target_triple = target_arch |
| if target_arch == 'arm': |
| target_triple = 'armv7' |
| api_level = '19' |
| if target_arch == 'aarch64' or target_arch == 'x86_64': |
| api_level = '21' |
| target_triple += '-linux-android' + api_level |
| cflags = [ |
| '--sysroot=%s/sysroot' % toolchain_dir, |
| |
| # We don't have an unwinder ready, and don't need it either. |
| '--unwindlib=none', |
| ] |
| |
| if target_arch == 'aarch64': |
| # Use PAC/BTI instructions for AArch64 |
| cflags += [ '-mbranch-protection=standard' ] |
| |
| android_args = compiler_rt_cmake_flags(sanitizers=True, profile=True) + [ |
| 'LLVM_ENABLE_RUNTIMES=compiler-rt', |
| # On Android, we want DWARF info for the builtins for unwinding. See |
| # crbug.com/1311807. |
| 'CMAKE_BUILD_TYPE=RelWithDebInfo', |
| 'CMAKE_C_FLAGS=' + ' '.join(cflags), |
| 'CMAKE_CXX_FLAGS=' + ' '.join(cflags), |
| 'CMAKE_ASM_FLAGS=' + ' '.join(cflags), |
| 'COMPILER_RT_USE_BUILTINS_LIBRARY=ON', |
| 'SANITIZER_CXX_ABI=libcxxabi', |
| 'CMAKE_SHARED_LINKER_FLAGS=-Wl,-u__cxa_demangle', |
| 'ANDROID=1', |
| 'LLVM_ENABLE_PER_TARGET_RUNTIME_DIR=OFF', |
| 'LLVM_INCLUDE_TESTS=OFF', |
| # This prevents static_asserts from firing in 32-bit builds. |
| # TODO: remove once we only support API >=24. |
| 'ANDROID_NATIVE_API_LEVEL=' + api_level, |
| ] |
| |
| runtimes_triples_args.append((target_triple, android_args)) |
| |
| if args.with_fuchsia: |
| # Fuchsia links against libclang_rt.builtins-<arch>.a instead of libgcc.a. |
| for target_arch in ['aarch64', 'x86_64']: |
| fuchsia_arch_name = {'aarch64': 'arm64', 'x86_64': 'x64'}[target_arch] |
| toolchain_dir = os.path.join( |
| FUCHSIA_SDK_DIR, 'arch', fuchsia_arch_name, 'sysroot') |
| target_triple = target_arch + '-unknown-fuchsia' |
| # Build the Fuchsia profile and asan runtimes. This is done after the rt |
| # builtins have been created because the CMake build runs link checks that |
| # require that the builtins already exist to succeed. |
| # TODO(thakis): Figure out why this doesn't build with the stage0 |
| # compiler in arm cross builds. |
| build_profile = target_arch == 'x86_64' and not args.build_mac_arm |
| # Build the asan runtime only on non-Mac platforms. Macs are excluded |
| # because the asan install changes library RPATHs which CMake only |
| # supports on ELF platforms and MacOS uses Mach-O instead of ELF. |
| build_sanitizers = build_profile and sys.platform != 'darwin' |
| # TODO(thakis): Might have to pass -B here once sysroot contains |
| # binaries (e.g. gas for arm64?) |
| fuchsia_args = compiler_rt_cmake_flags( |
| sanitizers=build_sanitizers, profile=build_profile |
| ) + [ |
| 'LLVM_ENABLE_RUNTIMES=compiler-rt', |
| 'CMAKE_SYSTEM_NAME=Fuchsia', |
| 'CMAKE_SYSROOT=%s' % toolchain_dir, |
| # TODO(thakis|scottmg): Use PER_TARGET_RUNTIME_DIR for all platforms. |
| # https://crbug.com/882485. |
| 'LLVM_ENABLE_PER_TARGET_RUNTIME_DIR=ON', |
| ] |
| if build_sanitizers: |
| fuchsia_args.append('SANITIZER_NO_UNDEFINED_SYMBOLS=OFF') |
| |
| runtimes_triples_args.append((target_triple, fuchsia_args)) |
| |
| # Convert FOO=BAR CMake flags per triple into |
| # -DBUILTINS_$triple_FOO=BAR/-DRUNTIMES_$triple_FOO=BAR and build up |
| # -DLLVM_BUILTIN_TARGETS/-DLLVM_RUNTIME_TARGETS. |
| all_triples = '' |
| for (triple, a) in runtimes_triples_args: |
| all_triples += ';' + triple |
| for arg in a: |
| assert not arg.startswith('-') |
| # 'default' is specially handled to pass through relevant CMake flags. |
| if triple == 'default': |
| cmake_args.append('-D' + arg) |
| else: |
| cmake_args.append('-DBUILTINS_' + triple + '_' + arg) |
| cmake_args.append('-DRUNTIMES_' + triple + '_' + arg) |
| cmake_args.append('-DLLVM_BUILTIN_TARGETS=' + all_triples) |
| cmake_args.append('-DLLVM_RUNTIME_TARGETS=' + all_triples) |
| |
| if os.path.exists(LLVM_BUILD_DIR): |
| RmTree(LLVM_BUILD_DIR) |
| EnsureDirExists(LLVM_BUILD_DIR) |
| os.chdir(LLVM_BUILD_DIR) |
| RunCommand(['cmake'] + cmake_args + [os.path.join(LLVM_DIR, 'llvm')], |
| msvc_arch='x64', |
| env=deployment_env) |
| CopyLibstdcpp(args, LLVM_BUILD_DIR) |
| RunCommand(['ninja'], msvc_arch='x64') |
| |
| if chrome_tools: |
| # If any Chromium tools were built, install those now. |
| RunCommand(['ninja', 'cr-install'], msvc_arch='x64') |
| |
| if not args.build_mac_arm: |
| VerifyVersionOfBuiltClangMatchesVERSION() |
| VerifyZlibSupport() |
| |
| # Run tests. |
| if (not args.build_mac_arm and |
| (args.run_tests or args.llvm_force_head_revision)): |
| RunCommand(['ninja', '-C', LLVM_BUILD_DIR, 'cr-check-all'], msvc_arch='x64') |
| |
| if not args.build_mac_arm and args.run_tests: |
| env = None |
| if sys.platform.startswith('linux'): |
| env = os.environ.copy() |
| # See SANITIZER_OVERRIDE_INTERCEPTORS above: We disable crypt_r() |
| # interception, so its tests can't pass. |
| env['LIT_FILTER_OUT'] = ('^SanitizerCommon-(a|l|m|ub|t)san-x86_64-Linux' + |
| ' :: Linux/crypt_r.cpp$') |
| RunCommand(['ninja', '-C', LLVM_BUILD_DIR, 'check-all'], |
| env=env, |
| msvc_arch='x64') |
| |
| WriteStampFile(PACKAGE_VERSION, STAMP_FILE) |
| WriteStampFile(PACKAGE_VERSION, FORCE_HEAD_REVISION_FILE) |
| print('Clang build was successful.') |
| return 0 |
| |
| |
| if __name__ == '__main__': |
| sys.exit(main()) |
