gecko-dev/build/moz.configure/bindgen.configure

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Python

# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
# vim: set filetype=python:
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
# cbindgen is needed by the style system build and webrender.
cbindgen_is_needed = depends(build_project)(lambda build_project: build_project != 'js')
option(env='CBINDGEN', nargs=1, when=cbindgen_is_needed,
help='Path to cbindgen')
@imports(_from='textwrap', _import='dedent')
def check_cbindgen_version(cbindgen, fatal=False):
log.debug("trying cbindgen: %s" % cbindgen)
cbindgen_min_version = Version('0.9.1')
# cbindgen x.y.z
version = Version(check_cmd_output(cbindgen, '--version').strip().split(" ")[1])
log.debug("%s has version %s" % (cbindgen, version))
if version >= cbindgen_min_version:
return True
if not fatal:
return False
die(dedent('''\
cbindgen version {} is too old. At least version {} is required.
Please update using 'cargo install cbindgen --force' or running
'./mach bootstrap', after removing the existing executable located at
{}.
'''.format(version, cbindgen_min_version, cbindgen)))
@depends_if('CBINDGEN', toolchain_search_path, when=cbindgen_is_needed)
@checking('for cbindgen')
@imports(_from='textwrap', _import='dedent')
def cbindgen(cbindgen_override, toolchain_search_path):
if cbindgen_override:
check_cbindgen_version(cbindgen_override[0], fatal=True)
return cbindgen_override[0]
candidates = []
for path in toolchain_search_path:
candidate = find_program('cbindgen', [path])
if not candidate:
continue
if check_cbindgen_version(candidate):
return candidate
candidates.append(candidate)
if not candidates:
raise FatalCheckError(dedent('''\
Cannot find cbindgen. Please run `mach bootstrap`,
`cargo install cbindgen`, ensure that `cbindgen` is on your PATH,
or point at an executable with `CBINDGEN`.
'''))
check_cbindgen_version(candidates[0], fatal=True)
set_config('CBINDGEN', cbindgen)
# Bindgen can use rustfmt to format Rust file, but it's not required.
js_option(env='RUSTFMT', nargs=1, help='Path to the rustfmt program')
rustfmt = check_prog('RUSTFMT', ['rustfmt'], paths=toolchain_search_path,
input='RUSTFMT', allow_missing=True)
js_option('--with-libclang-path', nargs=1,
help='Absolute path to a directory containing Clang/LLVM libraries for bindgen (version 3.9.x or above)')
js_option('--with-clang-path', nargs=1,
help='Absolute path to a Clang binary for bindgen (version 3.9.x or above)')
@depends('--with-clang-path', c_compiler, cxx_compiler, toolchain_search_path,
target, macos_sdk)
@checking('for clang for bindgen', lambda x: x.path if x else 'not found')
def bindgen_clang_compiler(clang_path, c_compiler, cxx_compiler,
toolchain_search_path, target, macos_sdk):
# When the target compiler is clang, use that, including flags.
if cxx_compiler.type == 'clang':
if clang_path and clang_path[0] not in (c_compiler.compiler,
cxx_compiler.compiler):
die('--with-clang-path is not valid when the target compiler is %s',
cxx_compiler.type)
return namespace(
path=cxx_compiler.compiler,
flags=cxx_compiler.flags,
)
# When the target compiler is clang-cl, use clang in the same directory,
# and figure the right flags to use.
if cxx_compiler.type == 'clang-cl':
if clang_path and os.path.dirname(clang_path[0]) != \
os.path.dirname(cxx_compiler.compiler):
die('--with-clang-path must point to clang in the same directory '
'as the target compiler')
if not clang_path:
clang_path = [os.path.join(os.path.dirname(cxx_compiler.compiler),
'clang')]
clang_path = find_program(clang_path[0] if clang_path else 'clang++',
toolchain_search_path)
if not clang_path:
return
flags = prepare_flags(target, macos_sdk)
info = check_compiler([clang_path] + flags, 'C++', target)
return namespace(
path=clang_path,
flags=flags + info.flags,
)
@depends('--with-libclang-path', bindgen_clang_compiler,
host_library_name_info, host)
@checking('for libclang for bindgen', lambda x: x if x else 'not found')
@imports('glob')
@imports(_from='os', _import='pathsep')
@imports(_from='os.path', _import='split', _as='pathsplit')
@imports('re')
def bindgen_libclang_path(libclang_path, clang, library_name_info, host):
if not clang:
if libclang_path:
die('--with-libclang-path is not valid without a clang compiler '
'for bindgen')
return
# Try to ensure that the clang shared library that bindgen is going
# to look for is actually present. The files that we search for
# mirror the logic in clang-sys/build.rs.
libclang_choices = []
if host.os == 'WINNT':
libclang_choices.append('libclang.dll')
libclang_choices.append('%sclang%s' % (library_name_info.dll.prefix,
library_name_info.dll.suffix))
if host.kernel == 'Linux':
libclang_choices.append('libclang.so.1')
if host.os == 'OpenBSD':
libclang_choices.append('libclang.so.*.*')
candidates = []
if not libclang_path:
# Try to find libclang_path based on clang search dirs.
clang_search_dirs = check_cmd_output(clang.path, '-print-search-dirs')
for line in clang_search_dirs.splitlines():
name, _, value = line.partition(': =')
if host.os == 'WINNT' and name == 'programs':
# On Windows, libclang.dll is in bin/ rather than lib/,
# so scan the programs search dirs.
# To make matters complicated, clang before version 9 uses `:`
# separate between paths (and `;` in newer versions)
if pathsep in value:
candidates.extend(value.split(pathsep))
else:
for part in value.split(':'):
# Assume that if previous "candidate" was of length 1,
# it's a drive letter and the current part is the rest of
# the corresponding full path.
if candidates and len(candidates[-1]) == 1:
candidates[-1] += ':' + part
else:
candidates.append(part)
elif host.os != 'WINNT' and name == 'libraries':
# On other platforms, use the directories from the libraries
# search dirs that looks like $something/clang/$version.
for dir in value.split(pathsep):
dir, version = pathsplit(dir)
if re.match(r'[0-9.]+', version):
dir, name = pathsplit(dir)
if name == 'clang':
candidates.append(dir)
else:
candidates.append(libclang_path[0])
for dir in candidates:
for pattern in libclang_choices:
log.debug('Trying "%s" in "%s"', pattern, dir)
libs = glob.glob(os.path.join(dir, pattern))
if libs:
return libs[0]
@depends(bindgen_clang_compiler, bindgen_libclang_path, build_project)
def bindgen_config_paths(clang, libclang, build_project):
# XXX: we want this code to be run for both Gecko and JS, but we don't
# necessarily want to force a bindgen/Rust dependency on JS just yet.
# Actually, we don't want to force an error if we're not building the
# browser generally. We therefore whitelist the projects that require
# bindgen facilities at this point and leave it at that.
if build_project in ('browser', 'mobile/android'):
if not clang:
die('Could not find clang to generate run bindings for C/C++. '
'Please install the necessary packages, run `mach bootstrap`, '
'or use --with-clang-path to give the location of clang.')
if not libclang:
die('Could not find libclang to generate rust bindings for C/C++. '
'Please install the necessary packages, run `mach bootstrap`, '
'or use --with-libclang-path to give the path containing it.')
if clang and libclang:
return namespace(
libclang=libclang,
libclang_path=os.path.dirname(libclang),
clang_path=clang.path,
clang_flags=clang.flags,
)
@depends(bindgen_config_paths.libclang, when=bindgen_config_paths)
@checking('that libclang is new enough', lambda s: 'yes' if s else 'no')
@imports(_from='ctypes', _import='CDLL')
@imports(_from='textwrap', _import='dedent')
def min_libclang_version(libclang):
try:
lib = CDLL(libclang.encode('utf-8'))
# We want at least 4.0. The API we test below is enough for that.
# Just accessing it should throw if not found.
fun = lib.clang_EvalResult_getAsLongLong
return True
except:
die(dedent('''\
The libclang located at {} is too old (need at least 4.0).
Please make sure to update it or point to a newer libclang using
--with-libclang-path.
'''.format(libclang)))
return False
set_config('MOZ_LIBCLANG_PATH', bindgen_config_paths.libclang_path)
set_config('MOZ_CLANG_PATH', bindgen_config_paths.clang_path)
@depends(target, target_is_unix, cxx_compiler, bindgen_cflags_android,
bindgen_config_paths.clang_flags)
def basic_bindgen_cflags(target, is_unix, compiler_info, android_cflags,
clang_flags):
args = [
'-x', 'c++', '-fno-sized-deallocation', '-fno-aligned-new',
'-DTRACING=1', '-DIMPL_LIBXUL', '-DMOZILLA_INTERNAL_API',
'-DRUST_BINDGEN'
]
if is_unix:
args += ['-DOS_POSIX=1']
if target.os == 'Android':
args += android_cflags
args += {
'Android': ['-DOS_ANDROID=1'],
'DragonFly': ['-DOS_BSD=1', '-DOS_DRAGONFLY=1'],
'FreeBSD': ['-DOS_BSD=1', '-DOS_FREEBSD=1'],
'GNU': ['-DOS_LINUX=1'],
'NetBSD': ['-DOS_BSD=1', '-DOS_NETBSD=1'],
'OpenBSD': ['-DOS_BSD=1', '-DOS_OPENBSD=1'],
'OSX': ['-DOS_MACOSX=1', '-stdlib=libc++'],
'SunOS': ['-DOS_SOLARIS=1'],
'WINNT': [
'-DOS_WIN=1',
'-DWIN32=1',
],
}.get(target.os, [])
if compiler_info.type == 'clang-cl':
args += [
# To enable the builtin __builtin_offsetof so that CRT wouldn't
# use reinterpret_cast in offsetof() which is not allowed inside
# static_assert().
'-D_CRT_USE_BUILTIN_OFFSETOF',
# Enable hidden attribute (which is not supported by MSVC and
# thus not enabled by default with a MSVC-compatibile build)
# to exclude hidden symbols from the generated file.
'-DHAVE_VISIBILITY_HIDDEN_ATTRIBUTE=1',
]
return args + (clang_flags or [])
js_option(env='BINDGEN_CFLAGS',
nargs=1,
help='Options bindgen should pass to the C/C++ parser')
@depends(basic_bindgen_cflags, 'BINDGEN_CFLAGS')
@checking('bindgen cflags', lambda s: s if s else 'no')
def bindgen_cflags(base_flags, extra_flags):
flags = base_flags
if extra_flags and len(extra_flags):
flags += extra_flags[0].split()
return ' '.join(flags)
add_old_configure_assignment('_BINDGEN_CFLAGS', bindgen_cflags)