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# -*- 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/.
option('--enable-rust', help='Include Rust language sources')
@depends('--enable-rust')
def rust_compiler_names(value):
if value:
return ['rustc']
@depends('--enable-rust')
def cargo_binary_names(value):
if value:
return ['cargo']
rustc = check_prog('RUSTC', rust_compiler_names, allow_missing=True)
cargo = check_prog('CARGO', cargo_binary_names, allow_missing=True)
@depends_if(rustc)
@checking('rustc version', lambda info: info.version)
def rustc_info(rustc):
out = check_cmd_output(rustc, '--version', '--verbose').splitlines()
info = dict((s.strip() for s in line.split(':', 1)) for line in out[1:])
return namespace(
version=Version(info.get('release', '0')),
commit=info.get('commit-hash', 'unknown'),
)
@depends_if(cargo)
@checking('cargo support for --frozen')
@imports('subprocess')
@imports('os')
def cargo_supports_frozen(cargo):
try:
lines = subprocess.check_output(
[cargo, 'help', 'build']
).splitlines()
supported = any(' --frozen' in l for l in lines)
if 'MOZ_AUTOMATION' in os.environ and not supported:
die('cargo in automation must support --frozen')
return supported
except subprocess.CalledProcessError as e:
die('Failed to call cargo: %s', e.message)
set_config('MOZ_CARGO_SUPPORTS_FROZEN', cargo_supports_frozen)
@depends('--enable-rust', rustc, rustc_info)
@imports(_from='textwrap', _import='dedent')
def rust_compiler(value, rustc, rustc_info):
if value:
if not rustc:
die(dedent('''\
Rust compiler not found.
To compile rust language sources, you must have 'rustc' in your path.
See https//www.rust-lang.org/ for more information.
'''))
version = rustc_info.version
min_version = Version('1.10')
if version < min_version:
die(dedent('''\
Rust compiler {} is too old.
To compile Rust language sources please install at least
version {} of the 'rustc' toolchain and make sure it is
first in your path.
You can verify this by typing 'rustc --version'.
'''.format(version, min_version)))
return True
set_config('MOZ_RUST', rust_compiler)
@depends(rust_compiler, rustc, target, cross_compiling)
@imports('os')
@imports('subprocess')
@imports(_from='mozbuild.configure.util', _import='LineIO')
@imports(_from='mozbuild.shellutil', _import='quote')
@imports(_from='tempfile', _import='mkstemp')
def rust_target(rust_compiler, rustc, target, cross_compiling):
if rust_compiler:
# Rust's --target options are similar to, but not exactly the same
# as, the autoconf-derived targets we use. An example would be that
# Rust uses distinct target triples for targetting the GNU C++ ABI
# and the MSVC C++ ABI on Win32, whereas autoconf has a single
# triple and relies on the user to ensure that everything is
# compiled for the appropriate ABI. We need to perform appropriate
# munging to get the correct option to rustc.
#
# The canonical list of targets supported can be derived from:
#
# https://github.com/rust-lang/rust/tree/master/mk/cfg
# Avoid having to write out os+kernel for all the platforms where
# they don't differ.
os_or_kernel = target.kernel if target.kernel == 'Linux' and target.os != 'Android' else target.os
rustc_target = {
# DragonFly
('x86_64', 'DragonFly'): 'x86_64-unknown-dragonfly',
# FreeBSD
('x86', 'FreeBSD'): 'i686-unknown-freebsd',
('x86_64', 'FreeBSD'): 'x86_64-unknown-freebsd',
# NetBSD
('x86_64', 'NetBSD'): 'x86_64-unknown-netbsd',
# OpenBSD
('x86_64', 'OpenBSD'): 'x86_64-unknown-openbsd',
# Linux
('x86', 'Linux'): 'i586-unknown-linux-gnu',
# Linux
('x86_64', 'Linux'): 'x86_64-unknown-linux-gnu',
# OS X and iOS
('x86', 'OSX'): 'i686-apple-darwin',
('x86', 'iOS'): 'i386-apple-ios',
('x86_64', 'OSX'): 'x86_64-apple-darwin',
# Android
('x86', 'Android'): 'i686-linux-android',
('arm', 'Android'): 'armv7-linux-androideabi',
# Windows
# XXX better detection of CXX needed here, to figure out whether
# we need i686-pc-windows-gnu instead, since mingw32 builds work.
('x86', 'WINNT'): 'i686-pc-windows-msvc',
('x86_64', 'WINNT'): 'x86_64-pc-windows-msvc',
}.get((target.cpu, os_or_kernel), None)
if rustc_target is None:
die("Don't know how to translate {} for rustc".format(target.alias))
# Check to see whether our rustc has a reasonably functional stdlib
# for our chosen target.
target_arg = '--target=' + rustc_target
in_fd, in_path = mkstemp(prefix='conftest', suffix='.rs')
out_fd, out_path = mkstemp(prefix='conftest', suffix='.rlib')
os.close(out_fd)
try:
source = 'pub extern fn hello() { println!("Hello world"); }'
log.debug('Creating `%s` with content:', in_path)
with LineIO(lambda l: log.debug('| %s', l)) as out:
out.write(source)
os.write(in_fd, source)
os.close(in_fd)
cmd = [
rustc,
'--crate-type', 'staticlib',
target_arg,
'-o', out_path,
in_path,
]
def failed():
die('Cannot compile for {} with {}'.format(target.alias, rustc))
check_cmd_output(*cmd, onerror=failed)
if not os.path.exists(out_path) or os.path.getsize(out_path) == 0:
failed()
finally:
os.remove(in_path)
os.remove(out_path)
# This target is usable.
return rustc_target
set_config('RUST_TARGET', rust_target)
# Until we remove all the other Rust checks in old-configure.
add_old_configure_assignment('MOZ_RUST', rust_compiler)
add_old_configure_assignment('RUSTC', rustc)
add_old_configure_assignment('RUST_TARGET', rust_target)
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