зеркало из https://github.com/mozilla/gecko-dev.git
314 строки
12 KiB
Python
314 строки
12 KiB
Python
# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
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# vim: set filetype=python:
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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# cbindgen is needed by the style system build.
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cbindgen = check_prog('CBINDGEN', ['cbindgen'], paths=toolchain_search_path,
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when=depends(build_project)
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(lambda build_project: build_project != 'js'))
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@depends_if(cbindgen)
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@checking('cbindgen version')
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@imports(_from='textwrap', _import='dedent')
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def cbindgen_version(cbindgen):
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cbindgen_min_version = Version('0.7.1')
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# cbindgen x.y.z
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version = Version(check_cmd_output(cbindgen, '--version').strip().split(" ")[1])
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if version < cbindgen_min_version:
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die(dedent('''\
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cbindgen version {} is too old. At least version {} is required.
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Please update using 'cargo install cbindgen --force' or running
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'./mach bootstrap', after removing the existing executable located at
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{}.
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'''.format(version, cbindgen_min_version, cbindgen)))
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return version
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# Bindgen can use rustfmt to format Rust file, but it's not required.
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js_option(env='RUSTFMT', nargs=1, help='Path to the rustfmt program')
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rustfmt = check_prog('RUSTFMT', ['rustfmt'], paths=toolchain_search_path,
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input='RUSTFMT', allow_missing=True)
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# We support setting up the appropriate options for bindgen via setting
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# LLVM_CONFIG or by providing explicit configure options. The Windows
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# installer of LLVM/Clang doesn't provide llvm-config, so we need both
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# methods to support all of our tier-1 platforms.
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@depends(host)
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@imports('os')
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def llvm_config_paths(host):
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llvm_supported_versions = ['6.0', '5.0', '4.0', '3.9']
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llvm_config_progs = []
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for version in llvm_supported_versions:
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llvm_config_progs += [
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'llvm-config-%s' % version,
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'llvm-config-mp-%s' % version, # MacPorts' chosen naming scheme.
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'llvm-config%s' % version.replace('.', ''),
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]
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llvm_config_progs.append('llvm-config')
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# Homebrew on macOS doesn't make clang available on PATH, so we have to
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# look for it in non-standard places.
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if host.kernel == 'Darwin':
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brew = find_program('brew')
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if brew:
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brew_config = check_cmd_output(brew, 'config').strip()
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for line in brew_config.splitlines():
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if line.startswith('HOMEBREW_PREFIX'):
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fields = line.split(None, 2)
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prefix = fields[1] if len(fields) == 2 else ''
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path = ['opt', 'llvm', 'bin', 'llvm-config']
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llvm_config_progs.append(os.path.join(prefix, *path))
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break
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# Also add in the location to which `mach bootstrap` or
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# `mach artifact toolchain` installs clang.
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mozbuild_state_dir = os.environ.get('MOZBUILD_STATE_PATH',
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os.path.expanduser(os.path.join('~', '.mozbuild')))
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bootstrap_llvm_config = os.path.join(mozbuild_state_dir, 'clang', 'bin', 'llvm-config')
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llvm_config_progs.append(bootstrap_llvm_config)
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return llvm_config_progs
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js_option(env='LLVM_CONFIG', nargs=1, help='Path to llvm-config')
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llvm_config = check_prog('LLVM_CONFIG', llvm_config_paths, input='LLVM_CONFIG',
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what='llvm-config', allow_missing=True)
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js_option('--with-libclang-path', nargs=1,
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help='Absolute path to a directory containing Clang/LLVM libraries for bindgen (version 3.9.x or above)')
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js_option('--with-clang-path', nargs=1,
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help='Absolute path to a Clang binary for bindgen (version 3.9.x or above)')
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def invoke_llvm_config(llvm_config, *options):
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'''Invoke llvm_config with the given options and return the first line of
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output.'''
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lines = check_cmd_output(llvm_config, *options).splitlines()
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return lines[0]
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@imports(_from='textwrap', _import='dedent')
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def check_minimum_llvm_config_version(llvm_config):
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version = Version(invoke_llvm_config(llvm_config, '--version'))
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min_version = Version('3.9.0')
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if version < min_version:
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die(dedent('''\
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llvm installation {} is incompatible with bindgen.
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Please install version {} or greater of Clang + LLVM
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and ensure that the 'llvm-config' from that
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installation is first on your path.
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You can verify this by typing 'llvm-config --version'.
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'''.format(version, min_version)))
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@depends(llvm_config, '--with-libclang-path', '--with-clang-path',
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host_library_name_info, host, build_project)
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@imports('os.path')
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@imports('glob')
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@imports(_from='textwrap', _import='dedent')
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def bindgen_config_paths(llvm_config, libclang_path, clang_path,
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library_name_info, host, build_project):
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def search_for_libclang(path):
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# Try to ensure that the clang shared library that bindgen is going
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# to look for is actually present. The files that we search for
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# mirror the logic in clang-sys/build.rs.
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libclang_choices = []
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if host.os == 'WINNT':
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libclang_choices.append('libclang.dll')
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libclang_choices.append('%sclang%s' % (library_name_info.dll.prefix,
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library_name_info.dll.suffix))
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if host.kernel == 'Linux':
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libclang_choices.append('libclang.so.1')
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if host.os == 'OpenBSD':
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libclang_choices = glob.glob(path + '/libclang.so.*.*')
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# At least one of the choices must be found.
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for choice in libclang_choices:
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libclang = os.path.join(path, choice)
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if os.path.exists(libclang):
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return (True, None)
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else:
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return (False, list(set(libclang_choices)))
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# XXX: we want this code to be run for both Gecko and JS, but we don't
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# necessarily want to force a bindgen/Rust dependency on JS just yet.
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# Actually, we don't want to force an error if we're not building the
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# browser generally. We therefore whitelist the projects that require
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# bindgen facilities at this point and leave it at that.
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bindgen_projects = ('browser', 'mobile/android')
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if not libclang_path and not clang_path:
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# We must have LLVM_CONFIG in this case.
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if not llvm_config:
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if build_project not in bindgen_projects:
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return namespace()
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die(dedent('''\
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Could not find LLVM/Clang installation for compiling bindgen.
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Please specify the 'LLVM_CONFIG' environment variable
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(recommended), pass the '--with-libclang-path' and '--with-clang-path'
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options to configure, or put 'llvm-config' in your PATH. Altering your
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PATH may expose 'clang' as well, potentially altering your compiler,
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which may not be what you intended.'''))
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check_minimum_llvm_config_version(llvm_config)
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libclang_arg = '--bindir' if host.os == 'WINNT' else '--libdir'
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libclang_path = invoke_llvm_config(llvm_config, libclang_arg)
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clang_path = os.path.join(invoke_llvm_config(llvm_config, '--bindir'),
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'clang')
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libclang_path = normsep(libclang_path)
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clang_path = normsep(clang_path)
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# Debian-based distros, at least, can have llvm-config installed
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# but not have other packages installed. Since the user is trying
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# to use their system packages, we can't be more specific about what
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# they need.
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clang_resolved = find_program(clang_path)
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if not clang_resolved:
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die(dedent('''\
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The file {} returned by `llvm-config {}` does not exist.
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clang is required to build Firefox. Please install the
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necessary packages, or run `mach bootstrap`.
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'''.format(clang_path, '--bindir')))
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if not os.path.exists(libclang_path):
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die(dedent('''\
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The directory {} returned by `llvm-config {}` does not exist.
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clang is required to build Firefox. Please install the
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necessary packages, or run `mach bootstrap`.
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'''.format(libclang_path, libclang_arg)))
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(found, searched) = search_for_libclang(libclang_path)
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if not found:
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die(dedent('''\
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Could not find the clang shared library in the path {}
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returned by `llvm-config {}` (searched for files {}).
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clang is required to build Firefox. Please install the
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necessary packages, or run `mach bootstrap`.
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'''.format(libclang_path, libclang_arg, searched)))
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return namespace(
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libclang_path=libclang_path,
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clang_path=clang_resolved,
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)
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if (not libclang_path and clang_path) or \
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(libclang_path and not clang_path):
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if build_project not in bindgen_projects:
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return namespace()
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die(dedent('''\
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You must provide both of --with-libclang-path and --with-clang-path
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or neither of them.'''))
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libclang_path = libclang_path[0]
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clang_path = clang_path[0]
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if not os.path.exists(libclang_path) or \
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not os.path.isdir(libclang_path):
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die(dedent('''\
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The argument to --with-libclang-path is not a directory: {}
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'''.format(libclang_path)))
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(found, searched) = search_for_libclang(libclang_path)
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if not found:
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die(dedent('''\
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Could not find the clang shared library in the path {}
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specified by --with-libclang-path (searched for files {}).
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'''.format(libclang_path, searched)))
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clang_resolved = find_program(clang_path)
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if not clang_resolved:
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die(dedent('''\
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The argument to --with-clang-path is not a file: {}
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'''.format(clang_path)))
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return namespace(
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libclang_path=libclang_path,
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clang_path=clang_resolved,
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)
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set_config('MOZ_LIBCLANG_PATH', bindgen_config_paths.libclang_path)
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set_config('MOZ_CLANG_PATH', bindgen_config_paths.clang_path)
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@depends(target, target_is_unix, cxx_compiler, bindgen_cflags_android,
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bindgen_config_paths.clang_path)
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def basic_bindgen_cflags(target, is_unix, compiler_info, android_cflags, clang_path):
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args = [
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'-x', 'c++', '-fno-sized-deallocation',
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'-DTRACING=1', '-DIMPL_LIBXUL', '-DMOZILLA_INTERNAL_API',
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'-DRUST_BINDGEN'
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]
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if is_unix:
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args += ['-DOS_POSIX=1']
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if target.os == 'Android':
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args += android_cflags
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args += {
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'Android': ['-DOS_ANDROID=1'],
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'DragonFly': ['-DOS_BSD=1', '-DOS_DRAGONFLY=1'],
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'FreeBSD': ['-DOS_BSD=1', '-DOS_FREEBSD=1'],
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'GNU': ['-DOS_LINUX=1'],
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'NetBSD': ['-DOS_BSD=1', '-DOS_NETBSD=1'],
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'OpenBSD': ['-DOS_BSD=1', '-DOS_OPENBSD=1'],
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'OSX': ['-DOS_MACOSX=1', '-stdlib=libc++'],
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'SunOS': ['-DOS_SOLARIS=1'],
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'WINNT': [
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'-DOS_WIN=1',
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'-DWIN32=1',
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],
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}.get(target.os, [])
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if compiler_info.type in ('msvc', 'clang-cl'):
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args += [
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# To enable the builtin __builtin_offsetof so that CRT wouldn't
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# use reinterpret_cast in offsetof() which is not allowed inside
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# static_assert().
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'-D_CRT_USE_BUILTIN_OFFSETOF',
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# Enable hidden attribute (which is not supported by MSVC and
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# thus not enabled by default with a MSVC-compatibile build)
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# to exclude hidden symbols from the generated file.
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'-DHAVE_VISIBILITY_HIDDEN_ATTRIBUTE=1',
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]
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# We want to pass the same base flags as we'd pass clang.
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# check_compiler from toolchain.configure gives us that.
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# XXX: We should actually use the compiler from toolchain.configure.
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# See bug 1526857.
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info = check_compiler([clang_path], 'C++', target)
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args += info.flags
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return args
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js_option(env='BINDGEN_CFLAGS',
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nargs=1,
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help='Options bindgen should pass to the C/C++ parser')
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@depends(basic_bindgen_cflags, 'BINDGEN_CFLAGS')
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@checking('bindgen cflags', lambda s: s if s else 'no')
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def bindgen_cflags(base_flags, extra_flags):
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flags = base_flags
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if extra_flags and len(extra_flags):
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flags += extra_flags[0].split()
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return ' '.join(flags)
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add_old_configure_assignment('_BINDGEN_CFLAGS', bindgen_cflags)
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