зеркало из https://github.com/mozilla/gecko-dev.git
307 строки
12 KiB
Python
307 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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@depends(build_project, '--enable-smoosh')
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def cbindgen_is_needed(build_project, js_enable_smoosh):
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if build_project != 'js':
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# cbindgen is needed by the style system build and webrender.
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return True
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# cbindgen is needed by SmooshMonkey.
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return js_enable_smoosh
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option(env='CBINDGEN', nargs=1, when=cbindgen_is_needed,
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help='Path to cbindgen')
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@imports(_from='textwrap', _import='dedent')
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def check_cbindgen_version(cbindgen, fatal=False):
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log.debug("trying cbindgen: %s" % cbindgen)
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cbindgen_min_version = Version('0.14.1')
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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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log.debug("%s has version %s" % (cbindgen, version))
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if version >= cbindgen_min_version:
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return True
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if not fatal:
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return False
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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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@depends_if('CBINDGEN', toolchain_search_path, when=cbindgen_is_needed)
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@checking('for cbindgen')
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@imports(_from='textwrap', _import='dedent')
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def cbindgen(cbindgen_override, toolchain_search_path):
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if cbindgen_override:
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check_cbindgen_version(cbindgen_override[0], fatal=True)
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return cbindgen_override[0]
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candidates = []
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for path in toolchain_search_path:
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candidate = find_program('cbindgen', [path])
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if not candidate:
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continue
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if check_cbindgen_version(candidate):
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return candidate
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candidates.append(candidate)
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if not candidates:
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raise FatalCheckError(dedent('''\
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Cannot find cbindgen. Please run `mach bootstrap`,
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`cargo install cbindgen`, ensure that `cbindgen` is on your PATH,
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or point at an executable with `CBINDGEN`.
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'''))
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check_cbindgen_version(candidates[0], fatal=True)
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set_config('CBINDGEN', cbindgen)
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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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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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@depends('--with-clang-path', c_compiler, cxx_compiler, toolchain_search_path,
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target, macos_sdk)
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@checking('for clang for bindgen', lambda x: x.path if x else 'not found')
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def bindgen_clang_compiler(clang_path, c_compiler, cxx_compiler,
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toolchain_search_path, target, macos_sdk):
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# When the target compiler is clang, use that, including flags.
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if cxx_compiler.type == 'clang':
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if clang_path and clang_path[0] not in (c_compiler.compiler,
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cxx_compiler.compiler):
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die('--with-clang-path is not valid when the target compiler is %s',
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cxx_compiler.type)
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return namespace(
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path=cxx_compiler.compiler,
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flags=cxx_compiler.flags,
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)
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# When the target compiler is clang-cl, use clang in the same directory,
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# and figure the right flags to use.
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if cxx_compiler.type == 'clang-cl':
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if clang_path and os.path.dirname(clang_path[0]) != \
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os.path.dirname(cxx_compiler.compiler):
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die('--with-clang-path must point to clang in the same directory '
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'as the target compiler')
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if not clang_path:
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clang_path = [os.path.join(os.path.dirname(cxx_compiler.compiler),
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'clang')]
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clang_path = find_program(clang_path[0] if clang_path else 'clang++',
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toolchain_search_path)
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if not clang_path:
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return
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# Hack before bug 1617793: if the compiler is clang-cl, hack the target
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if cxx_compiler.type == 'clang-cl':
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target = split_triplet('%s-pc-windows-msvc' % target.raw_cpu, allow_msvc=True)
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flags = prepare_flags(target, macos_sdk)
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info = check_compiler([clang_path] + flags, 'C++', target)
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return namespace(
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path=clang_path,
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flags=flags + info.flags,
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)
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@depends('--with-libclang-path', bindgen_clang_compiler,
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host_library_name_info, host)
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@checking('for libclang for bindgen', lambda x: x if x else 'not found')
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@imports('glob')
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@imports(_from='os', _import='pathsep')
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@imports(_from='os.path', _import='split', _as='pathsplit')
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@imports('re')
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def bindgen_libclang_path(libclang_path, clang, library_name_info, host):
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if not clang:
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if libclang_path:
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die('--with-libclang-path is not valid without a clang compiler '
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'for bindgen')
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return
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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.*')
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if host.os == 'OpenBSD':
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libclang_choices.append('libclang.so.*.*')
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candidates = []
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if not libclang_path:
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# Try to find libclang_path based on clang search dirs.
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clang_search_dirs = check_cmd_output(clang.path, '-print-search-dirs')
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for line in clang_search_dirs.splitlines():
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name, _, value = line.partition(': =')
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if host.os == 'WINNT' and name == 'programs':
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# On Windows, libclang.dll is in bin/ rather than lib/,
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# so scan the programs search dirs.
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# To make matters complicated, clang before version 9 uses `:`
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# separate between paths (and `;` in newer versions)
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if pathsep in value:
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candidates.extend(value.split(pathsep))
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else:
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for part in value.split(':'):
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# Assume that if previous "candidate" was of length 1,
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# it's a drive letter and the current part is the rest of
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# the corresponding full path.
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if candidates and len(candidates[-1]) == 1:
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candidates[-1] += ':' + part
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else:
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candidates.append(part)
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elif host.os != 'WINNT' and name == 'libraries':
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# On other platforms, use the directories from the libraries
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# search dirs that looks like $something/clang/$version.
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for dir in value.split(pathsep):
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dir, version = pathsplit(dir)
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if re.match(r'[0-9.]+', version):
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dir, name = pathsplit(dir)
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if name == 'clang':
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candidates.append(dir)
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else:
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candidates.append(libclang_path[0])
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for dir in candidates:
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for pattern in libclang_choices:
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log.debug('Trying "%s" in "%s"', pattern, dir)
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libs = glob.glob(os.path.join(dir, pattern))
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if libs:
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return libs[0]
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@depends(bindgen_clang_compiler, bindgen_libclang_path, build_project)
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def bindgen_config_paths(clang, libclang, build_project):
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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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if build_project in ('browser', 'mobile/android'):
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if not clang:
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die('Could not find clang to generate run bindings for C/C++. '
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'Please install the necessary packages, run `mach bootstrap`, '
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'or use --with-clang-path to give the location of clang.')
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if not libclang:
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die('Could not find libclang to generate rust bindings for C/C++. '
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'Please install the necessary packages, run `mach bootstrap`, '
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'or use --with-libclang-path to give the path containing it.')
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if clang and libclang:
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return namespace(
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libclang=libclang,
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libclang_path=os.path.dirname(libclang),
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clang_path=clang.path,
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clang_flags=clang.flags,
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)
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@depends(bindgen_config_paths.libclang, when=bindgen_config_paths)
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@checking('that libclang is new enough', lambda s: 'yes' if s else 'no')
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@imports(_from='ctypes', _import='CDLL')
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@imports(_from='textwrap', _import='dedent')
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def min_libclang_version(libclang):
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try:
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lib = CDLL(libclang)
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# We want at least 4.0. The API we test below is enough for that.
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# Just accessing it should throw if not found.
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fun = lib.clang_EvalResult_getAsLongLong
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return True
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except:
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die(dedent('''\
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The libclang located at {} is too old (need at least 4.0).
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Please make sure to update it or point to a newer libclang using
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--with-libclang-path.
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'''.format(libclang)))
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return False
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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_flags)
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def basic_bindgen_cflags(target, is_unix, compiler_info, android_cflags,
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clang_flags):
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args = [
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'-x', 'c++', '-fno-sized-deallocation', '-fno-aligned-new',
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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 == '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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return args + (clang_flags or [])
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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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