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54 lines
1.8 KiB
54 lines
1.8 KiB
5 years ago
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# 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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"""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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if T.TYPE_CHECKING:
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from ..environment import Environment
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class EmscriptenMixin:
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def _get_compile_output(self, dirname, mode):
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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 = 'wasm'
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return os.path.join(dirname, 'output.' + suffix)
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def thread_flags(self, env: 'Environment') -> T.List[str]:
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return ['-s', 'USE_PTHREADS=1']
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def get_options(self):
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opts = super().get_options()
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opts.update({
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'{}_thread_count'.format(self.language): 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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