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* New feature <relevant> which is automatically deduced in most cases. * Features which are not relevant do not affect target paths and do not prevent merging of virtual targets. * generators.jam: generator.run always returns usage-requirements to allow usage-requirements in non-top-level generators. This is necessary because we're using usage-requirements to track relevance from flags. * New rule toolset.uses-features to specify features that the rule checks manually, instead of using toolset.flags. In the future, we should consider restricting the properties actually passed, to detect errors. * Adjust tests to handle the new paths (verified by inspection). * Add temporary option --ignore-relevance to consider all features relevant to aid migration. * New rule property.evaluate-conditional-relevance which helps tracking relevance in <conditional>. * Widely scattered changes to use the new interfaces.
30 lines
775 B
Plaintext
30 lines
775 B
Plaintext
# Copyright 2017 Alexander Karzhenkov
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# Distributed under the Boost Software License, Version 1.0.
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# (See accompanying file LICENSE_1_0.txt or copy at
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# http://www.boost.org/LICENSE_1_0.txt)
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# TODO: Documentation.
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import property-set ;
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import feature : feature ;
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if ! [ feature.valid threadapi ]
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{
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feature threadapi : win32 pthread : optional propagated ;
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}
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rule get-default ( property-set )
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{
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local api = pthread ;
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if [ $(property-set).get <target-os> ] = windows { api = win32 ; }
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return $(api) ;
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}
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rule detect ( properties * )
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{
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local ps = [ property-set.create $(properties) ] ;
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local api = [ $(ps).get <threadapi> ] ;
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if ! $(api) { api = [ get-default $(ps) ] ; }
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return <threadapi>$(api) <relevant>threadapi:<relevant>target-os ;
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}
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