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# SPDX-License-Identifier: Apache-2.0
# Copyright © 2024 Intel Corporation
"""Provides mixins for Apple compilers."""
from __future__ import annotations
import typing as T
from ...mesonlib import MesonException
if T.TYPE_CHECKING:
from ..._typing import ImmutableListProtocol
from ...environment import Environment
from ..compilers import Compiler
else:
# This is a bit clever, for mypy we pretend that these mixins descend from
# Compiler, so we get all of the methods and attributes defined for us, but
# for runtime we make them descend from object (which all classes normally
# do). This gives up DRYer type checking, with no runtime impact
Compiler = object
class AppleCompilerMixin(Compiler):
"""Handle differences between Vanilla Clang and the Clang shipped with XCode."""
__BASE_OMP_FLAGS: ImmutableListProtocol[str] = ['-Xpreprocessor', '-fopenmp']
def openmp_flags(self, env: Environment) -> T.List[str]:
"""Flags required to compile with OpenMP on Apple.
The Apple Clang Compiler doesn't have builtin support for OpenMP, it
must be provided separately. As such, we need to add the -Xpreprocessor
argument so that an external OpenMP can be found.
:return: A list of arguments
"""
m = env.machines[self.for_machine]
assert m is not None, 'for mypy'
if m.cpu_family.startswith('x86'):
root = '/usr/local'
else:
root = '/opt/homebrew'
return self.__BASE_OMP_FLAGS + [f'-I{root}/opt/libomp/include']
def openmp_link_flags(self, env: Environment) -> T.List[str]:
m = env.machines[self.for_machine]
assert m is not None, 'for mypy'
if m.cpu_family.startswith('x86'):
root = '/usr/local'
else:
root = '/opt/homebrew'
link = self.find_library('omp', env, [f'{root}/opt/libomp/lib'])
if not link:
raise MesonException("Couldn't find libomp")
return self.__BASE_OMP_FLAGS + link
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