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# Copyright 2019 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.
"""Mixins for compilers that *are* linkers.
While many compilers (such as gcc and clang) are used by meson to dispatch
linker commands and other (like MSVC) are not, a few (such as DMD) actually
are both the linker and compiler in one binary. This module provides mixin
classes for those cases.
"""
import os
import typing as T
from ... import mesonlib
if T.TYPE_CHECKING:
from ...coredata import OptionDictType
from ...environment import Environment
class LinkerEnvVarsMixin:
"""Mixin reading LDFLAGS from the environment."""
def get_linker_args_from_envvars(self) -> T.List[str]:
flags = os.environ.get('LDFLAGS')
if not flags:
return []
return mesonlib.split_args(flags)
class BasicLinkerIsCompilerMixin:
"""Provides a baseline of methods that a linker would implement.
In every case this provides a "no" or "empty" answer. If a compiler
implements any of these it needs a different mixin or to override that
functionality itself.
"""
def sanitizer_link_args(self, value: str) -> T.List[str]:
return []
def get_lto_link_args(self) -> T.List[str]:
return []
def can_linker_accept_rsp(self) -> bool:
return mesonlib.is_windows()
def get_linker_exelist(self) -> T.List[str]:
return self.exelist.copy()
def get_linker_output_args(self, output: str) -> T.List[str]:
return []
def get_linker_always_args(self) -> T.List[str]:
return []
def get_linker_lib_prefix(self) -> str:
return ''
def get_option_link_args(self, options: 'OptionDictType') -> T.List[str]:
return []
def has_multi_link_args(self, args: T.List[str], env: 'Environment') -> T.Tuple[bool, bool]:
return False, False
def get_link_debugfile_args(self, targetfile: str) -> T.List[str]:
return []
def get_std_shared_lib_link_args(self) -> T.List[str]:
return []
def get_std_shared_module_args(self, options: 'OptionDictType') -> T.List[str]:
return self.get_std_shared_lib_link_args()
def get_link_whole_for(self, args: T.List[str]) -> T.List[str]:
raise mesonlib.EnvironmentException(
'Linker {} does not support link_whole'.format(self.id))
def get_allow_undefined_link_args(self) -> T.List[str]:
raise mesonlib.EnvironmentException(
'Linker {} does not support allow undefined'.format(self.id))
def get_pie_link_args(self) -> T.List[str]:
m = 'Linker {} does not support position-independent executable'
raise mesonlib.EnvironmentException(m.format(self.id))
def get_undefined_link_args(self) -> T.List[str]:
return []
def get_coverage_link_args(self) -> T.List[str]:
m = "Linker {} doesn't implement coverage data generation.".format(self.id)
raise mesonlib.EnvironmentException(m)
def no_undefined_link_args(self) -> T.List[str]:
return []
def bitcode_args(self) -> T.List[str]:
raise mesonlib.MesonException("This linker doesn't support bitcode bundles")
def get_soname_args(self, for_machine: 'mesonlib.MachineChoice',
prefix: str, shlib_name: str, suffix: str, soversion: str,
darwin_versions: T.Tuple[str, str],
is_shared_module: bool) -> T.List[str]:
raise mesonlib.MesonException("This linker doesn't support soname args")
def build_rpath_args(self, env: 'Environment', build_dir: str, from_dir: str,
rpath_paths: str, build_rpath: str,
install_rpath: str) -> T.List[str]:
return []
def get_linker_debug_crt_args(self) -> T.List[str]:
return []
def get_asneeded_args(self) -> T.List[str]:
return []
def get_buildtype_linker_args(self, buildtype: str) -> T.List[str]:
return []
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