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'
]).rstrip()
# Copy libstdc++.so.6 into the build dir so that the built binaries can find
# it. Binaries get their rpath set to $origin/../lib/. For clang, lld,
# etc. that live in the bin/ directory, this means they expect to find the .so
# in their neighbouring lib/ dir. For other tools however, this doesn't work
# since those exeuctables are spread out into different directories.
# TODO(hans): Unit tests don't get rpath set at all, unittests/ copying
# below doesn't help at the moment.
for d in [
'lib', 'test/tools/llvm-isel-fuzzer/lib',
'test/tools/llvm-opt-fuzzer/lib', 'unittests/CodeGen/lib',
'unittests/DebugInfo/lib', 'unittests/ExecutionEngine/lib',
'unittests/Support/lib', 'unittests/Target/lib',
'unittests/Transforms/lib', 'unittests/lib', 'unittests/tools/lib',
'unittests/tools/llvm-exegesis/lib'
]:
EnsureDirExists(os.path.join(build_dir, d))
CopyFile(libstdcpp, os.path.join(build_dir, d))
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 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('--disable-asserts',
action='store_true',
help='build with asserts disabled')
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('--lto-lld',
action='store_true',
help='build lld with LTO (only applies on Linux)')
parser.add_argument('--pgo', action='store_true', help='build with PGO')
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('--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('--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()
if args.lto_lld and not args.bootstrap:
print('--lto-lld requires --bootstrap')
return 1
if args.lto_lld and not sys.platform.startswith('linux'):
# TODO(hans): Use it on Windows too.
print('--lto-lld is only effective on Linux. Ignoring the option.')
args.lto_lld = False
if args.pgo and not args.bootstrap:
print('--pgo 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.llvm_force_head_revision:
# Don't build fuchsia runtime on ToT bots at all.
args.with_fuchsia = False
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/+/master/docs/fuchsia_build_instructions.md'
)
print('for general Fuchsia build instructions.')
return 1
# Don't buffer stdout, so that print statements are immediately flushed.
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/965937): Use urllib once our Python is recent enough, and
# move this down to where we fetch other build tools.
AddGnuWinToPath()
# TODO(crbug.com/929645): Remove once we build on host systems with a modern
# enough GCC to build Clang.
MaybeDownloadHostGcc(args)
global CLANG_REVISION, PACKAGE_VERSION
if args.llvm_force_head_revision:
CLANG_REVISION = GetLatestLLVMCommit()
if not args.skip_checkout:
CheckoutLLVM(CLANG_REVISION, LLVM_DIR)
if args.llvm_force_head_revision:
PACKAGE_VERSION = 'n%s-%s-0' % (GetCommitCount(CLANG_REVISION),
CLANG_REVISION[:8])
print('Locally building clang %s...' % PACKAGE_VERSION)
WriteStampFile('', STAMP_FILE)
WriteStampFile('', FORCE_HEAD_REVISION_FILE)
AddCMakeToPath(args)
DeleteChromeToolsShim()
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
if args.gcc_toolchain:
# 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: ' + args.gcc_toolchain)
return 1
cflags = []
cxxflags = []
ldflags = []
targets = 'AArch64;ARM;Mips;PowerPC;SystemZ;WebAssembly;X86'
projects = 'clang;compiler-rt;lld;chrometools'
if sys.platform == 'darwin':
# clang needs libc++, else -stdlib=libc++ won't find includes
# (this is needed for bootstrap builds and for building the fuchsia runtime)
projects += ';libcxx'
base_cmake_args = [
'-GNinja',
'-DCMAKE_BUILD_TYPE=Release',
'-DLLVM_ENABLE_ASSERTIONS=%s' %
('OFF' if args.disable_asserts else 'ON'),
'-DLLVM_ENABLE_PROJECTS=' + projects,
'-DLLVM_TARGETS_TO_BUILD=' + targets,
'-DLLVM_ENABLE_PIC=OFF',
'-DLLVM_ENABLE_UNWIND_TABLES=OFF',
'-DLLVM_ENABLE_TERMINFO=OFF',
'-DCLANG_PLUGIN_SUPPORT=OFF',
'-DCLANG_ENABLE_STATIC_ANALYZER=OFF',
'-DCLANG_ENABLE_ARCMT=OFF',
'-DBUG_REPORT_URL=' + BUG_REPORT_URL,
# See PR41956: Don't link libcxx into libfuzzer.
'-DCOMPILER_RT_USE_LIBCXX=NO',
# Don't run Go bindings tests; PGO makes them confused.
'-DLLVM_INCLUDE_GO_TESTS=OFF',
]
if args.gcc_toolchain:
# Don't use the custom gcc toolchain when building compiler-rt tests; those
# tests are built with the just-built Clang, and target both i386 and x86_64
# for example, so should ust the system's libstdc++.
base_cmake_args.append(
'-DCOMPILER_RT_TEST_COMPILER_CFLAGS=--gcc-toolchain=')
if sys.platform == 'win32':
base_cmake_args.append('-DLLVM_USE_CRT_RELEASE=MT')
if sys.platform == 'darwin':
# Use the system libc++abi.
# TODO(hans): use https://reviews.llvm.org/D62060 instead
base_cmake_args.append('-DLIBCXX_CXX_ABI=libcxxabi')
base_cmake_args.append('-DLIBCXX_CXX_ABI_SYSTEM=1')
if sys.platform != 'win32':
# libxml2 is required by the Win manifest merging tool used in cross-builds.
base_cmake_args.append('-DLLVM_ENABLE_LIBXML2=FORCE_ON')
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'
if args.pgo:
# Need libclang_rt.profile
projects += ';compiler-rt'
if sys.platform != 'darwin' or args.lto_lld:
projects += ';lld'
if sys.platform == 'darwin':
# Need libc++ and compiler-rt for the bootstrap compiler on mac.
projects += ';libcxx;compiler-rt'
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,
'-DCMAKE_INSTALL_PREFIX=' + LLVM_BOOTSTRAP_INSTALL_DIR,
'-DCMAKE_C_FLAGS=' + ' '.join(cflags),
'-DCMAKE_CXX_FLAGS=' + ' '.join(cxxflags),
# Ignore args.disable_asserts for the bootstrap compiler.
'-DLLVM_ENABLE_ASSERTIONS=ON',
]
if sys.platform == 'darwin':
# 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).
bootstrap_args.extend([
'-DDARWIN_osx_ARCHS=x86_64',
'-DCOMPILER_RT_BUILD_BUILTINS=ON',
'-DCOMPILER_RT_BUILD_CRT=OFF',
'-DCOMPILER_RT_BUILD_LIBFUZZER=OFF',
'-DCOMPILER_RT_BUILD_SANITIZERS=OFF',
'-DCOMPILER_RT_BUILD_XRAY=OFF',
'-DCOMPILER_RT_ENABLE_IOS=OFF',
'-DCOMPILER_RT_ENABLE_WATCHOS=OFF',
'-DCOMPILER_RT_ENABLE_TVOS=OFF',
])
elif args.pgo:
# PGO needs libclang_rt.profile but none of the other compiler-rt stuff.
bootstrap_args.extend([
'-DCOMPILER_RT_BUILD_BUILTINS=OFF',
'-DCOMPILER_RT_BUILD_CRT=OFF',
'-DCOMPILER_RT_BUILD_LIBFUZZER=OFF',
'-DCOMPILER_RT_BUILD_PROFILE=ON',
'-DCOMPILER_RT_BUILD_SANITIZERS=OFF',
'-DCOMPILER_RT_BUILD_XRAY=OFF',
])
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')
CopyLibstdcpp(args, LLVM_BOOTSTRAP_DIR)
CopyLibstdcpp(args, LLVM_BOOTSTRAP_INSTALL_DIR)
RunCommand(['ninja'], msvc_arch='x64')
if args.run_tests:
test_targets = ['check-all']
if sys.platform == 'darwin':
# TODO(crbug.com/731375): Run check-all on Darwin too.
test_targets = ['check-llvm', 'check-clang', 'check-builtins']
if sys.platform == 'win32':
CopyDiaDllTo(os.path.join(LLVM_BOOTSTRAP_DIR, 'bin'))
RunCommand(['ninja'] + test_targets, 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++')
if sys.platform.startswith('linux'):
base_cmake_args.append('-DLLVM_ENABLE_LLD=ON')
if args.gcc_toolchain:
# Tell the bootstrap compiler where to find the standard library headers
# and shared object files.
cflags.append('--gcc-toolchain=' + args.gcc_toolchain)
cxxflags.append('--gcc-toolchain=' + args.gcc_toolchain)
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'
if sys.platform == 'darwin':
projects += ';libcxx;compiler-rt'
instrument_args = base_cmake_args + [
'-DLLVM_ENABLE_THREADS=OFF',
'-DLLVM_ENABLE_PROJECTS=' + projects,
'-DCMAKE_C_FLAGS=' + ' '.join(cflags),
'-DCMAKE_CXX_FLAGS=' + ' '.join(cxxflags),
# 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')
CopyLibstdcpp(args, LLVM_INSTRUMENTED_DIR)
RunCommand(['ninja'], 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.
#
# 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, 'w') 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([
'-stdlib=libc++', '-isysroot',
subprocess.check_output(['xcrun', '--show-sdk-path']).rstrip()
])
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.')
compiler_rt_args = [
'-DCOMPILER_RT_BUILD_CRT=OFF',
'-DCOMPILER_RT_BUILD_LIBFUZZER=OFF',
'-DCOMPILER_RT_BUILD_PROFILE=ON',
'-DCOMPILER_RT_BUILD_SANITIZERS=ON',
'-DCOMPILER_RT_BUILD_XRAY=OFF',
]
if sys.platform == 'darwin':
compiler_rt_args.extend([
'-DCOMPILER_RT_BUILD_BUILTINS=ON',
'-DCOMPILER_RT_ENABLE_IOS=ON',
'-DCOMPILER_RT_ENABLE_WATCHOS=OFF',
'-DCOMPILER_RT_ENABLE_TVOS=OFF',
# armv7 is A5 and earlier, armv7s is A6+ (2012 and later, before 64-bit
# iPhones). armv7k is Apple Watch, which we don't need.
'-DDARWIN_ios_ARCHS=armv7;armv7s;arm64',
'-DDARWIN_iossim_ARCHS=i386;x86_64',
# We don't need 32-bit intel support for macOS, we only ship 64-bit.
'-DDARWIN_osx_ARCHS=x86_64',
])
else:
compiler_rt_args.append('-DCOMPILER_RT_BUILD_BUILTINS=OFF')
# 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'
# 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
# Build lld and code coverage tools. This is done separately from the rest of
# the build because these tools require threading support.
print('Building thread-enabled tools.')
tools_with_threading = ['dsymutil', 'lld', 'llvm-cov', 'llvm-profdata']
print('Building the following tools with threading support: %s' %
str(tools_with_threading))
if os.path.exists(THREADS_ENABLED_BUILD_DIR):
RmTree(THREADS_ENABLED_BUILD_DIR)
EnsureDirExists(THREADS_ENABLED_BUILD_DIR)
os.chdir(THREADS_ENABLED_BUILD_DIR)
threads_enabled_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)
]
if cc is not None:
threads_enabled_cmake_args.append('-DCMAKE_C_COMPILER=' + cc)
if cxx is not None:
threads_enabled_cmake_args.append('-DCMAKE_CXX_COMPILER=' + cxx)
if lld is not None:
threads_enabled_cmake_args.append('-DCMAKE_LINKER=' + lld)
if args.lto_lld:
# Build lld with LTO. That speeds up the linker by ~10%.
# We only use LTO for Linux now.
#
# The linker expects all archive members to have symbol tables, so the
# archiver needs to be able to create symbol tables for bitcode files.
# GNU ar and ranlib don't understand bitcode files, but llvm-ar and
# llvm-ranlib do, so use them.
ar = os.path.join(LLVM_BOOTSTRAP_INSTALL_DIR, 'bin', 'llvm-ar')
ranlib = os.path.join(LLVM_BOOTSTRAP_INSTALL_DIR, 'bin', 'llvm-ranlib')
threads_enabled_cmake_args += [
'-DCMAKE_AR=' + ar,
'-DCMAKE_RANLIB=' + ranlib,
'-DLLVM_ENABLE_LTO=thin',
]
RunCommand(['cmake'] + threads_enabled_cmake_args +
[os.path.join(LLVM_DIR, 'llvm')],
msvc_arch='x64',
env=deployment_env)
CopyLibstdcpp(args, THREADS_ENABLED_BUILD_DIR)
RunCommand(['ninja'] + tools_with_threading, msvc_arch='x64')
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 + compiler_rt_args + [
'-DLLVM_ENABLE_THREADS=OFF', '-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,
'-DCHROMIUM_TOOLS_SRC=%s' %
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 sys.platform == 'darwin':
cmake_args += [
'-DCOMPILER_RT_ENABLE_IOS=ON', '-DSANITIZER_MIN_OSX_VERSION=10.7'
]
# TODO(crbug.com/962988): Use -DLLVM_EXTERNAL_PROJECTS instead.
CreateChromeToolsShim()
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')
# Copy in the threaded versions of lld and other tools.
if sys.platform == 'win32':
CopyFile(
os.path.join(THREADS_ENABLED_BUILD_DIR, 'bin', 'lld-link.exe'),
os.path.join(LLVM_BUILD_DIR, 'bin'))
CopyFile(os.path.join(THREADS_ENABLED_BUILD_DIR, 'bin', 'lld.pdb'),
os.path.join(LLVM_BUILD_DIR, 'bin'))
else:
for tool in tools_with_threading:
CopyFile(os.path.join(THREADS_ENABLED_BUILD_DIR, 'bin', tool),
os.path.join(LLVM_BUILD_DIR, 'bin'))
if chrome_tools:
# If any Chromium tools were built, install those now.
RunCommand(['ninja', 'cr-install'], msvc_arch='x64')
VerifyVersionOfBuiltClangMatchesVERSION()
if sys.platform == 'win32':
platform = 'windows'
elif sys.platform == 'darwin':
platform = 'darwin'
else:
assert sys.platform.startswith('linux')
platform = 'linux'
rt_lib_dst_dir = os.path.join(LLVM_BUILD_DIR, 'lib', 'clang',
RELEASE_VERSION, 'lib', platform)
# Do an out-of-tree build of compiler-rt for 32-bit Win clang_rt.profile.lib.
if sys.platform == 'win32':
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)
if args.bootstrap:
# The bootstrap compiler produces 64-bit binaries by default.
cflags += ['-m32']
cxxflags += ['-m32']
compiler_rt_args = base_cmake_args + [
'-DLLVM_ENABLE_THREADS=OFF',
'-DCMAKE_C_FLAGS=' + ' '.join(cflags),
'-DCMAKE_CXX_FLAGS=' + ' '.join(cxxflags),
'-DCOMPILER_RT_BUILD_BUILTINS=OFF',
'-DCOMPILER_RT_BUILD_CRT=OFF',
'-DCOMPILER_RT_BUILD_LIBFUZZER=OFF',
'-DCOMPILER_RT_BUILD_PROFILE=ON',
'-DCOMPILER_RT_BUILD_SANITIZERS=OFF',
'-DCOMPILER_RT_BUILD_XRAY=OFF',
]
RunCommand(['cmake'] + compiler_rt_args +
[os.path.join(LLVM_DIR, 'llvm')],
msvc_arch='x86',
env=deployment_env)
RunCommand(['ninja', 'compiler-rt'], msvc_arch='x86')
# Copy select output to the main tree.
rt_lib_src_dir = os.path.join(COMPILER_RT_BUILD_DIR, 'lib', 'clang',
RELEASE_VERSION, 'lib', platform)
# Static and dynamic libraries:
CopyDirectoryContents(rt_lib_src_dir, rt_lib_dst_dir)
if args.with_android:
make_toolchain = os.path.join(ANDROID_NDK_DIR, 'build', 'tools',
'make_standalone_toolchain.py')
# TODO(thakis): Now that the NDK uses clang, try to build all archs in
# one LLVM build instead of making 3 different toolchains and building
# 3 times.
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)
api_level = '21' if target_arch == 'aarch64' else '19'
RunCommand([
make_toolchain, '--api=' + api_level, '--force',
'--install-dir=%s' % toolchain_dir, '--stl=libc++',
'--arch=' + {
'aarch64': 'arm64',
'arm': 'arm',
'i686': 'x86',
}[target_arch]
])
# Build compiler-rt runtimes needed 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)
target_triple = target_arch
if target_arch == 'arm':
target_triple = 'armv7'
target_triple += '-linux-android' + api_level
cflags = [
'--target=%s' % target_triple,
'--sysroot=%s/sysroot' % toolchain_dir,
'-B%s' % toolchain_dir
]
android_args = base_cmake_args + [
'-DLLVM_ENABLE_THREADS=OFF', '-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), '-DCMAKE_ASM_FLAGS=' + ' '.join(cflags),
'-DCOMPILER_RT_BUILD_BUILTINS=OFF',
'-DCOMPILER_RT_BUILD_CRT=OFF',
'-DCOMPILER_RT_BUILD_LIBFUZZER=OFF',
'-DCOMPILER_RT_BUILD_PROFILE=ON',
'-DCOMPILER_RT_BUILD_SANITIZERS=ON',
'-DCOMPILER_RT_BUILD_XRAY=OFF',
'-DSANITIZER_CXX_ABI=libcxxabi',
'-DCMAKE_SHARED_LINKER_FLAGS=-Wl,-u__cxa_demangle',
'-DANDROID=1'
]
RunCommand(['cmake'] + android_args + [COMPILER_RT_DIR])
# We use ASan i686 build for fuzzing.
libs_want = ['lib/linux/libclang_rt.asan-{0}-android.so']
if target_arch in ['aarch64', 'arm']:
libs_want += [
'lib/linux/libclang_rt.ubsan_standalone-{0}-android.so',
'lib/linux/libclang_rt.profile-{0}-android.a',
]
if target_arch == 'aarch64':
libs_want += ['lib/linux/libclang_rt.hwasan-{0}-android.so']
libs_want = [lib.format(target_arch) for lib in libs_want]
RunCommand(['ninja'] + libs_want)
# And copy them into the main build tree.
for p in libs_want:
shutil.copy(p, rt_lib_dst_dir)
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')
# Build clang_rt runtime for Fuchsia in a separate build tree.
build_dir = os.path.join(LLVM_BUILD_DIR, 'fuchsia-' + target_arch)
if not os.path.exists(build_dir):
os.mkdir(os.path.join(build_dir))
os.chdir(build_dir)
target_spec = target_arch + '-fuchsia'
# TODO(thakis): Might have to pass -B here once sysroot contains
# binaries (e.g. gas for arm64?)
fuchsia_args = base_cmake_args + [
'-DLLVM_ENABLE_THREADS=OFF',
'-DCMAKE_C_COMPILER=' +
os.path.join(LLVM_BUILD_DIR, 'bin/clang'),
'-DCMAKE_CXX_COMPILER=' +
os.path.join(LLVM_BUILD_DIR, 'bin/clang++'),
'-DCMAKE_LINKER=' + os.path.join(LLVM_BUILD_DIR, 'bin/clang'),
'-DCMAKE_AR=' + os.path.join(LLVM_BUILD_DIR, 'bin/llvm-ar'),
'-DLLVM_CONFIG_PATH=' +
os.path.join(LLVM_BUILD_DIR, 'bin/llvm-config'),
'-DCMAKE_SYSTEM_NAME=Fuchsia',
'-DCMAKE_C_COMPILER_TARGET=%s-fuchsia' % target_arch,
'-DCMAKE_ASM_COMPILER_TARGET=%s-fuchsia' % target_arch,
'-DCOMPILER_RT_BUILD_BUILTINS=ON',
'-DCOMPILER_RT_BUILD_CRT=OFF',
'-DCOMPILER_RT_BUILD_LIBFUZZER=OFF',
'-DCOMPILER_RT_BUILD_PROFILE=OFF',
'-DCOMPILER_RT_BUILD_SANITIZERS=OFF',
'-DCOMPILER_RT_BUILD_XRAY=OFF',
'-DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON',
'-DCMAKE_SYSROOT=%s' % toolchain_dir,
# TODO(thakis|scottmg): Use PER_TARGET_RUNTIME_DIR for all platforms.
# https://crbug.com/882485.
'-DLLVM_ENABLE_PER_TARGET_RUNTIME_DIR=ON',
# These are necessary because otherwise CMake tries to build an
# executable to test to see if the compiler is working, but in doing so,
# it links against the builtins.a that we're about to build.
'-DCMAKE_C_COMPILER_WORKS=ON',
'-DCMAKE_ASM_COMPILER_WORKS=ON',
]
RunCommand(['cmake'] + fuchsia_args +
[os.path.join(COMPILER_RT_DIR, 'lib', 'builtins')])
builtins_a = 'libclang_rt.builtins.a'
RunCommand(['ninja', builtins_a])
# And copy it into the main build tree.
fuchsia_lib_dst_dir = os.path.join(LLVM_BUILD_DIR, 'lib', 'clang',
RELEASE_VERSION, 'lib',
target_spec)
if not os.path.exists(fuchsia_lib_dst_dir):
os.makedirs(fuchsia_lib_dst_dir)
CopyFile(os.path.join(build_dir, 'lib', target_spec, builtins_a),
fuchsia_lib_dst_dir)
# Run tests.
if args.run_tests or args.llvm_force_head_revision:
RunCommand(['ninja', '-C', LLVM_BUILD_DIR, 'cr-check-all'],
msvc_arch='x64')
if args.run_tests:
if sys.platform == 'win32':
CopyDiaDllTo(os.path.join(LLVM_BUILD_DIR, 'bin'))
test_targets = ['check-all']
if sys.platform == 'darwin':
# TODO(thakis): Run check-all on Darwin too, https://crbug.com/959361
test_targets = ['check-llvm', 'check-clang', 'check-lld']
RunCommand(['ninja', '-C', LLVM_BUILD_DIR] + test_targets,
msvc_arch='x64')
if sys.platform == 'darwin':
for dylib in glob.glob(os.path.join(rt_lib_dst_dir, '*.dylib')):
# Fix LC_ID_DYLIB for the ASan dynamic libraries to be relative to
# @executable_path.
# Has to happen after running tests.
# 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
])
WriteStampFile(PACKAGE_VERSION, STAMP_FILE)
WriteStampFile(PACKAGE_VERSION, FORCE_HEAD_REVISION_FILE)
print('Clang build 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('--disable-asserts',
action='store_true',
help='build with asserts disabled')
parser.add_argument('--gcc-toolchain', help='(no longer used)')
parser.add_argument('--lto-lld',
action='store_true',
help='build lld with LTO')
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('--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('--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()
if args.lto_lld and not args.bootstrap:
print('--lto-lld requires --bootstrap')
return 1
if args.lto_lld and not sys.platform.startswith('linux'):
print('--lto-lld is only effective on Linux. Ignoring the option.')
args.lto_lld = False
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.llvm_force_head_revision:
# Don't build fuchsia runtime on ToT bots at all.
args.with_fuchsia = False
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/+/master/docs/fuchsia_build_instructions.md'
)
print('for general Fuchsia build instructions.')
return 1
# DEVELOPER_DIR needs to be set when Xcode isn't in a standard location
# and xcode-select wasn't run. This is needed for running clang and ld
# for the build done by this script, but it's also needed for running
# macOS system svn, so this needs to happen before calling functions using
# svn.
SetMacXcodePath()
AddSvnToPathOnWin()
global CLANG_REVISION, PACKAGE_VERSION
if args.llvm_force_head_revision:
CLANG_REVISION = GetSvnRevision(LLVM_REPO_URL)
PACKAGE_VERSION = CLANG_REVISION + '-0'
# Don't buffer stdout, so that print statements are immediately flushed.
sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 0)
print('Locally building clang %s...' % PACKAGE_VERSION)
WriteStampFile('', STAMP_FILE)
WriteStampFile('', FORCE_HEAD_REVISION_FILE)
AddCMakeToPath(args)
AddGnuWinToPath()
DeleteChromeToolsShim()
CheckoutRepos(args)
if args.skip_build:
return
cc, cxx = None, None
cflags = []
cxxflags = []
ldflags = []
targets = 'AArch64;ARM;Mips;PowerPC;SystemZ;WebAssembly;X86'
base_cmake_args = [
'-GNinja',
'-DCMAKE_BUILD_TYPE=Release',
'-DLLVM_ENABLE_ASSERTIONS=%s' %
('OFF' if args.disable_asserts else 'ON'),
'-DLLVM_ENABLE_PIC=OFF',
'-DLLVM_ENABLE_TERMINFO=OFF',
'-DLLVM_TARGETS_TO_BUILD=' + targets,
# Statically link MSVCRT to avoid DLL dependencies.
'-DLLVM_USE_CRT_RELEASE=MT',
'-DCLANG_PLUGIN_SUPPORT=OFF',
'-DCLANG_ENABLE_STATIC_ANALYZER=OFF',
'-DCLANG_ENABLE_ARCMT=OFF',
# TODO(crbug.com/929645): Use newer toolchain to host.
'-DLLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN=ON',
'-DBUG_REPORT_URL=' + BUG_REPORT_URL,
]
if sys.platform != 'win32':
# libxml2 is required by the Win manifest merging tool used in cross-builds.
base_cmake_args.append('-DLLVM_ENABLE_LIBXML2=FORCE_ON')
if args.bootstrap:
print('Building bootstrap compiler')
EnsureDirExists(LLVM_BOOTSTRAP_DIR)
os.chdir(LLVM_BOOTSTRAP_DIR)
bootstrap_args = base_cmake_args + [
'-DLLVM_TARGETS_TO_BUILD=X86;ARM;AArch64',
'-DCMAKE_INSTALL_PREFIX=' + LLVM_BOOTSTRAP_INSTALL_DIR,
'-DCMAKE_C_FLAGS=' + ' '.join(cflags),
'-DCMAKE_CXX_FLAGS=' + ' '.join(cxxflags),
# Ignore args.disable_asserts for the bootstrap compiler.
'-DLLVM_ENABLE_ASSERTIONS=ON',
]
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 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++')
print('Building final compiler')
# 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)
# 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
# Build lld and code coverage tools. This is done separately from the rest of
# the build because these tools require threading support.
tools_with_threading = ['dsymutil', 'lld', 'llvm-cov', 'llvm-profdata']
print('Building the following tools with threading support: %s' %
str(tools_with_threading))
if os.path.exists(THREADS_ENABLED_BUILD_DIR):
RmTree(THREADS_ENABLED_BUILD_DIR)
EnsureDirExists(THREADS_ENABLED_BUILD_DIR)
os.chdir(THREADS_ENABLED_BUILD_DIR)
threads_enabled_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)
]
if cc is not None:
threads_enabled_cmake_args.append('-DCMAKE_C_COMPILER=' + cc)
if cxx is not None:
threads_enabled_cmake_args.append('-DCMAKE_CXX_COMPILER=' + cxx)
if args.lto_lld:
# Build lld with LTO. That speeds up the linker by ~10%.
# We only use LTO for Linux now.
#
# The linker expects all archive members to have symbol tables, so the
# archiver needs to be able to create symbol tables for bitcode files.
# GNU ar and ranlib don't understand bitcode files, but llvm-ar and
# llvm-ranlib do, so use them.
ar = os.path.join(LLVM_BOOTSTRAP_INSTALL_DIR, 'bin', 'llvm-ar')
ranlib = os.path.join(LLVM_BOOTSTRAP_INSTALL_DIR, 'bin', 'llvm-ranlib')
threads_enabled_cmake_args += [
'-DCMAKE_AR=' + ar, '-DCMAKE_RANLIB=' + ranlib,
'-DLLVM_ENABLE_LTO=thin', '-DLLVM_USE_LINKER=lld'
]
RmCmakeCache('.')
RunCommand(['cmake'] + threads_enabled_cmake_args + [LLVM_DIR],
msvc_arch='x64',
env=deployment_env)
RunCommand(['ninja'] + tools_with_threading, msvc_arch='x64')
# Build clang and other tools.
CreateChromeToolsShim()
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)
default_tools = ['plugins', 'blink_gc_plugin', 'translation_unit']
chrome_tools = list(set(default_tools + args.extra_tools))
cmake_args += base_cmake_args + [
'-DLLVM_ENABLE_THREADS=OFF', '-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,
'-DCHROMIUM_TOOLS_SRC=%s' %
os.path.join(CHROMIUM_DIR, 'tools', 'clang'),
'-DCHROMIUM_TOOLS=%s' % ';'.join(chrome_tools)
]
EnsureDirExists(LLVM_BUILD_DIR)
os.chdir(LLVM_BUILD_DIR)
RmCmakeCache('.')
RunCommand(['cmake'] + cmake_args + [LLVM_DIR],
msvc_arch='x64',
env=deployment_env)
RunCommand(['ninja'], msvc_arch='x64')
# Copy in the threaded versions of lld and other tools.
if sys.platform == 'win32':
CopyFile(
os.path.join(THREADS_ENABLED_BUILD_DIR, 'bin', 'lld-link.exe'),
os.path.join(LLVM_BUILD_DIR, 'bin'))
CopyFile(os.path.join(THREADS_ENABLED_BUILD_DIR, 'bin', 'lld.pdb'),
os.path.join(LLVM_BUILD_DIR, 'bin'))
else:
for tool in tools_with_threading:
CopyFile(os.path.join(THREADS_ENABLED_BUILD_DIR, 'bin', tool),
os.path.join(LLVM_BUILD_DIR, 'bin'))
if chrome_tools:
# If any Chromium tools were built, install those now.
RunCommand(['ninja', 'cr-install'], msvc_arch='x64')
VerifyVersionOfBuiltClangMatchesVERSION()
# 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 + [
'-DLLVM_ENABLE_THREADS=OFF', '-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')
if sys.platform != 'win32':
RunCommand(['ninja', 'fuzzer'])
# 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'
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.
rt_lib_src_dir = os.path.join(COMPILER_RT_BUILD_DIR, 'lib', 'clang',
RELEASE_VERSION, 'lib', platform)
rt_lib_dst_dir = os.path.join(LLVM_BUILD_DIR, 'lib', 'clang',
RELEASE_VERSION, 'lib', platform)
# Blacklists:
CopyDirectoryContents(os.path.join(rt_lib_src_dir, '..', '..', 'share'),
os.path.join(rt_lib_dst_dir, '..', '..', 'share'))
# Headers:
if sys.platform != 'win32':
CopyDirectoryContents(
os.path.join(COMPILER_RT_BUILD_DIR, 'include/sanitizer'),
os.path.join(LLVM_BUILD_DIR, 'lib/clang', RELEASE_VERSION,
'include/sanitizer'))
# Static and dynamic libraries:
CopyDirectoryContents(rt_lib_src_dir, rt_lib_dst_dir)
if sys.platform == 'darwin':
for dylib in glob.glob(os.path.join(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 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)
api_level = '21' if target_arch == 'aarch64' else '19'
RunCommand([
make_toolchain, '--api=' + api_level, '--force',
'--install-dir=%s' % toolchain_dir, '--stl=libc++',
'--arch=' + {
'aarch64': 'arm64',
'arm': 'arm',
'i686': 'x86',
}[target_arch]
])
# NDK r16 "helpfully" installs libc++ as libstdc++ "so the compiler will
# pick it up by default". Only these days, the compiler tries to find
# libc++ instead. See https://crbug.com/902270.
shutil.copy(
os.path.join(toolchain_dir, 'sysroot/usr/lib/libstdc++.a'),
os.path.join(toolchain_dir, 'sysroot/usr/lib/libc++.a'))
shutil.copy(
os.path.join(toolchain_dir, 'sysroot/usr/lib/libstdc++.so'),
os.path.join(toolchain_dir, 'sysroot/usr/lib/libc++.so'))
# Build compiler-rt runtimes needed 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)
target_triple = target_arch
if target_arch == 'arm':
target_triple = 'armv7'
target_triple += '-linux-android' + api_level
cflags = [
'--target=%s' % target_triple,
'--sysroot=%s/sysroot' % toolchain_dir,
'-B%s' % toolchain_dir
]
android_args = base_cmake_args + [
'-DLLVM_ENABLE_THREADS=OFF', '-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), '-DCMAKE_ASM_FLAGS=' + ' '.join(cflags),
'-DSANITIZER_CXX_ABI=libcxxabi',
'-DCMAKE_SHARED_LINKER_FLAGS=-Wl,-u__cxa_demangle',
'-DANDROID=1'
]
RmCmakeCache('.')
RunCommand(['cmake'] + android_args + [COMPILER_RT_DIR])
# We use ASan i686 build for fuzzing.
libs_want = ['lib/linux/libclang_rt.asan-{0}-android.so']
if target_arch in ['aarch64', 'arm']:
libs_want += [
'lib/linux/libclang_rt.ubsan_standalone-{0}-android.so',
'lib/linux/libclang_rt.profile-{0}-android.a',
]
if target_arch == 'aarch64':
libs_want += ['lib/linux/libclang_rt.hwasan-{0}-android.so']
libs_want = [lib.format(target_arch) for lib in libs_want]
RunCommand(['ninja'] + libs_want)
# And copy them into the main build tree.
for p in libs_want:
shutil.copy(p, rt_lib_dst_dir)
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')
# Build clang_rt runtime for Fuchsia in a separate build tree.
build_dir = os.path.join(LLVM_BUILD_DIR, 'fuchsia-' + target_arch)
if not os.path.exists(build_dir):
os.mkdir(os.path.join(build_dir))
os.chdir(build_dir)
target_spec = target_arch + '-fuchsia'
# TODO(thakis): Might have to pass -B here once sysroot contains
# binaries (e.g. gas for arm64?)
fuchsia_args = base_cmake_args + [
'-DLLVM_ENABLE_THREADS=OFF',
'-DCMAKE_C_COMPILER=' +
os.path.join(LLVM_BUILD_DIR, 'bin/clang'),
'-DCMAKE_CXX_COMPILER=' +
os.path.join(LLVM_BUILD_DIR, 'bin/clang++'),
'-DCMAKE_LINKER=' + os.path.join(LLVM_BUILD_DIR, 'bin/clang'),
'-DCMAKE_AR=' + os.path.join(LLVM_BUILD_DIR, 'bin/llvm-ar'),
'-DLLVM_CONFIG_PATH=' +
os.path.join(LLVM_BUILD_DIR, 'bin/llvm-config'),
'-DCMAKE_SYSTEM_NAME=Fuchsia',
'-DCMAKE_C_COMPILER_TARGET=%s-fuchsia' % target_arch,
'-DCMAKE_ASM_COMPILER_TARGET=%s-fuchsia' % target_arch,
'-DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON',
'-DCMAKE_SYSROOT=%s' % toolchain_dir,
# TODO(thakis|scottmg): Use PER_TARGET_RUNTIME_DIR for all platforms.
# https://crbug.com/882485.
'-DLLVM_ENABLE_PER_TARGET_RUNTIME_DIR=ON',
# These are necessary because otherwise CMake tries to build an
# executable to test to see if the compiler is working, but in doing so,
# it links against the builtins.a that we're about to build.
'-DCMAKE_C_COMPILER_WORKS=ON',
'-DCMAKE_ASM_COMPILER_WORKS=ON',
]
RmCmakeCache('.')
RunCommand(['cmake'] + fuchsia_args +
[os.path.join(COMPILER_RT_DIR, 'lib', 'builtins')])
builtins_a = 'libclang_rt.builtins.a'
RunCommand(['ninja', builtins_a])
# And copy it into the main build tree.
fuchsia_lib_dst_dir = os.path.join(LLVM_BUILD_DIR, 'lib', 'clang',
RELEASE_VERSION, target_spec,
'lib')
if not os.path.exists(fuchsia_lib_dst_dir):
os.makedirs(fuchsia_lib_dst_dir)
CopyFile(os.path.join(build_dir, target_spec, 'lib', builtins_a),
fuchsia_lib_dst_dir)
# Run tests.
if args.run_tests or args.llvm_force_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, STAMP_FILE)
WriteStampFile(PACKAGE_VERSION, FORCE_HEAD_REVISION_FILE)
print('Clang build was successful.')
return 0