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101 lines
4.0 KiB
101 lines
4.0 KiB
# Copyright 2019 The meson development team |
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# |
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# Licensed under the Apache License, Version 2.0 (the "License"); |
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# you may not use this file except in compliance with the License. |
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# You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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from __future__ import annotations |
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"""Provides a mixin for shared code between C and C++ Emscripten compilers.""" |
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import os.path |
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import typing as T |
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from ... import coredata |
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from ... import mesonlib |
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from ...mesonlib import OptionKey |
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from ...mesonlib import LibType |
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if T.TYPE_CHECKING: |
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from ...environment import Environment |
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from ...compilers.compilers import Compiler |
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from ...dependencies import Dependency |
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else: |
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# This is a bit clever, for mypy we pretend that these mixins descend from |
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# Compiler, so we get all of the methods and attributes defined for us, but |
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# for runtime we make them descend from object (which all classes normally |
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# do). This gives up DRYer type checking, with no runtime impact |
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Compiler = object |
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def wrap_js_includes(args: T.List[str]) -> T.List[str]: |
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final_args = [] |
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for i in args: |
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if i.endswith('.js') and not i.startswith('-'): |
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final_args += ['--js-library', i] |
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else: |
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final_args += [i] |
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return final_args |
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class EmscriptenMixin(Compiler): |
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def _get_compile_output(self, dirname: str, mode: str) -> str: |
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# In pre-processor mode, the output is sent to stdout and discarded |
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if mode == 'preprocess': |
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return None |
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# Unlike sane toolchains, emcc infers the kind of output from its name. |
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# This is the only reason why this method is overridden; compiler tests |
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# do not work well with the default exe/obj suffices. |
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if mode == 'link': |
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suffix = 'js' |
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else: |
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suffix = 'o' |
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return os.path.join(dirname, 'output.' + suffix) |
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def thread_link_flags(self, env: 'Environment') -> T.List[str]: |
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args = ['-pthread'] |
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count: int = env.coredata.options[OptionKey('thread_count', lang=self.language, machine=self.for_machine)].value |
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if count: |
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args.append(f'-sPTHREAD_POOL_SIZE={count}') |
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return args |
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def get_options(self) -> 'coredata.MutableKeyedOptionDictType': |
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opts = super().get_options() |
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key = OptionKey('thread_count', machine=self.for_machine, lang=self.language) |
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opts.update({ |
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key: coredata.UserIntegerOption( |
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'Number of threads to use in web assembly, set to 0 to disable', |
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(0, None, 4), # Default was picked at random |
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), |
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}) |
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return opts |
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@classmethod |
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def native_args_to_unix(cls, args: T.List[str]) -> T.List[str]: |
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return wrap_js_includes(super().native_args_to_unix(args)) |
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def get_dependency_link_args(self, dep: 'Dependency') -> T.List[str]: |
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return wrap_js_includes(super().get_dependency_link_args(dep)) |
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def find_library(self, libname: str, env: 'Environment', extra_dirs: T.List[str], |
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libtype: LibType = LibType.PREFER_SHARED, lib_prefix_warning: bool = True) -> T.Optional[T.List[str]]: |
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if not libname.endswith('.js'): |
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return super().find_library(libname, env, extra_dirs, libtype, lib_prefix_warning) |
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if os.path.isabs(libname): |
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if os.path.exists(libname): |
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return [libname] |
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if len(extra_dirs) == 0: |
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raise mesonlib.EnvironmentException('Looking up Emscripten JS libraries requires either an absolute path or specifying extra_dirs.') |
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for d in extra_dirs: |
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abs_path = os.path.join(d, libname) |
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if os.path.exists(abs_path): |
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return [abs_path] |
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return None
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