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# Copyright 2012-2022 The Meson development team
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# http://www.apache.org/licenses/LICENSE-2.0
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from __future__ import annotations
import subprocess, os.path
import textwrap
import re
import typing as T
from .. import coredata, mlog
from ..mesonlib import EnvironmentException, MesonException, Popen_safe, OptionKey, join_args
from .compilers import Compiler, rust_buildtype_args, clike_debug_args
if T.TYPE_CHECKING:
from ..coredata import MutableKeyedOptionDictType, KeyedOptionDictType
from ..envconfig import MachineInfo
from ..environment import Environment # noqa: F401
from ..linkers import DynamicLinker
from ..mesonlib import MachineChoice
from ..programs import ExternalProgram
from ..dependencies import Dependency
rust_optimization_args = {
'plain': [],
'0': [],
'g': ['-C', 'opt-level=0'],
'1': ['-C', 'opt-level=1'],
'2': ['-C', 'opt-level=2'],
'3': ['-C', 'opt-level=3'],
's': ['-C', 'opt-level=s'],
} # type: T.Dict[str, T.List[str]]
class RustCompiler(Compiler):
# rustc doesn't invoke the compiler itself, it doesn't need a LINKER_PREFIX
language = 'rust'
id = 'rustc'
_WARNING_LEVELS: T.Dict[str, T.List[str]] = {
'0': ['-A', 'warnings'],
'1': [],
'2': [],
'3': ['-W', 'warnings'],
}
def __init__(self, exelist: T.List[str], version: str, for_machine: MachineChoice,
is_cross: bool, info: 'MachineInfo',
exe_wrapper: T.Optional['ExternalProgram'] = None,
full_version: T.Optional[str] = None,
linker: T.Optional['DynamicLinker'] = None):
super().__init__([], exelist, version, for_machine, info,
is_cross=is_cross, full_version=full_version,
linker=linker)
self.exe_wrapper = exe_wrapper
self.base_options.update({OptionKey(o) for o in ['b_colorout', 'b_ndebug']})
if 'link' in self.linker.id:
self.base_options.add(OptionKey('b_vscrt'))
self.native_static_libs: T.List[str] = []
def needs_static_linker(self) -> bool:
return False
def sanity_check(self, work_dir: str, environment: 'Environment') -> None:
source_name = os.path.join(work_dir, 'sanity.rs')
output_name = os.path.join(work_dir, 'rusttest')
with open(source_name, 'w', encoding='utf-8') as ofile:
ofile.write(textwrap.dedent(
'''fn main() {
}
'''))
cmdlist = self.exelist + ['-o', output_name, source_name]
pc, stdo, stde = Popen_safe(cmdlist, cwd=work_dir)
mlog.debug('Sanity check compiler command line:', join_args(cmdlist))
mlog.debug('Sanity check compile stdout:')
mlog.debug(stdo)
mlog.debug('-----\nSanity check compile stderr:')
mlog.debug(stde)
mlog.debug('-----')
if pc.returncode != 0:
raise EnvironmentException(f'Rust compiler {self.name_string()} cannot compile programs.')
if self.is_cross:
if self.exe_wrapper is None:
# Can't check if the binaries run so we have to assume they do
return
cmdlist = self.exe_wrapper.get_command() + [output_name]
else:
cmdlist = [output_name]
pe = subprocess.Popen(cmdlist, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
pe.wait()
if pe.returncode != 0:
raise EnvironmentException(f'Executables created by Rust compiler {self.name_string()} are not runnable.')
# Get libraries needed to link with a Rust staticlib
cmdlist = self.exelist + ['--crate-type', 'staticlib', '--print', 'native-static-libs', source_name]
p, stdo, stde = Popen_safe(cmdlist, cwd=work_dir)
if p.returncode == 0:
match = re.search('native-static-libs: (.*)$', stde, re.MULTILINE)
if match:
# Exclude some well known libraries that we don't need because they
# are always part of C/C++ linkers. Rustc probably should not print
# them, pkg-config for example never specify them.
# FIXME: https://github.com/rust-lang/rust/issues/55120
exclude = {'-lc', '-lgcc_s', '-lkernel32', '-ladvapi32'}
self.native_static_libs = [i for i in match.group(1).split() if i not in exclude]
def get_dependency_gen_args(self, outtarget: str, outfile: str) -> T.List[str]:
return ['--dep-info', outfile]
def get_buildtype_args(self, buildtype: str) -> T.List[str]:
return rust_buildtype_args[buildtype]
def get_sysroot(self) -> str:
cmd = self.get_exelist(ccache=False) + ['--print', 'sysroot']
p, stdo, stde = Popen_safe(cmd)
return stdo.split('\n', maxsplit=1)[0]
def get_debug_args(self, is_debug: bool) -> T.List[str]:
return clike_debug_args[is_debug]
def get_optimization_args(self, optimization_level: str) -> T.List[str]:
return rust_optimization_args[optimization_level]
def compute_parameters_with_absolute_paths(self, parameter_list: T.List[str],
build_dir: str) -> T.List[str]:
for idx, i in enumerate(parameter_list):
if i[:2] == '-L':
for j in ['dependency', 'crate', 'native', 'framework', 'all']:
combined_len = len(j) + 3
if i[:combined_len] == f'-L{j}=':
parameter_list[idx] = i[:combined_len] + os.path.normpath(os.path.join(build_dir, i[combined_len:]))
break
return parameter_list
def get_output_args(self, outputname: str) -> T.List[str]:
return ['-o', outputname]
@classmethod
def use_linker_args(cls, linker: str, version: str) -> T.List[str]:
return ['-C', f'linker={linker}']
# Rust does not have a use_linker_args because it dispatches to a gcc-like
# C compiler for dynamic linking, as such we invoke the C compiler's
# use_linker_args method instead.
def get_options(self) -> 'MutableKeyedOptionDictType':
key = OptionKey('std', machine=self.for_machine, lang=self.language)
return {
key: coredata.UserComboOption(
'Rust edition to use',
['none', '2015', '2018', '2021'],
'none',
),
}
def get_dependency_compile_args(self, dep: 'Dependency') -> T.List[str]:
# Rust doesn't have dependency compile arguments so simply return
# nothing here. Dependencies are linked and all required metadata is
# provided by the linker flags.
return []
def get_option_compile_args(self, options: 'KeyedOptionDictType') -> T.List[str]:
args = []
key = OptionKey('std', machine=self.for_machine, lang=self.language)
std = options[key]
if std.value != 'none':
args.append('--edition=' + std.value)
return args
def get_crt_compile_args(self, crt_val: str, buildtype: str) -> T.List[str]:
# Rust handles this for us, we don't need to do anything
return []
def get_colorout_args(self, colortype: str) -> T.List[str]:
if colortype in {'always', 'never', 'auto'}:
return [f'--color={colortype}']
raise MesonException(f'Invalid color type for rust {colortype}')
def get_linker_always_args(self) -> T.List[str]:
args: T.List[str] = []
for a in super().get_linker_always_args():
args.extend(['-C', f'link-arg={a}'])
return args
def get_werror_args(self) -> T.List[str]:
# Use -D warnings, which makes every warning not explicitly allowed an
# error
return ['-D', 'warnings']
def get_warn_args(self, level: str) -> T.List[str]:
# TODO: I'm not really sure what to put here, Rustc doesn't have warning
return self._WARNING_LEVELS[level]
def get_no_warn_args(self) -> T.List[str]:
return self._WARNING_LEVELS["0"]
def get_pic_args(self) -> T.List[str]:
# relocation-model=pic is rustc's default already.
return []
def get_pie_args(self) -> T.List[str]:
# Rustc currently has no way to toggle this, it's controlled by whether
# pic is on by rustc
return []
def get_assert_args(self, disable: bool) -> T.List[str]:
action = "no" if disable else "yes"
return ['-C', f'debug-assertions={action}']
class ClippyRustCompiler(RustCompiler):
"""Clippy is a linter that wraps Rustc.
This just provides us a different id
"""
id = 'clippy-driver rustc'
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