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[SR-9974] Block copy/destroy helper is multiply defined on PE/COFF #52378

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compnerd opened this issue Feb 22, 2019 · 1 comment
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[SR-9974] Block copy/destroy helper is multiply defined on PE/COFF #52378

compnerd opened this issue Feb 22, 2019 · 1 comment
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compiler The Swift compiler in itself

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Previous ID SR-9974
Radar None
Original Reporter @compnerd
Type Sub-task
Status Resolved
Resolution Done
Additional Detail from JIRA
Votes 0
Component/s Compiler
Labels Sub-task
Assignee @compnerd
Priority Medium

md5: 388e8402d1c5ac51cb1a71486a8f1dd1

Parent-Task:

Issue Description:

The block copy/destroy helper was reworked by Akira to de-duplicate definitions. The use of the LinkOnceODR ensures a definition and preservation but does not generate a deduplicated version for PE/COFF. This causes multiply defined symbols as it relies on weak symbol semantics which do not exist in PE/COFF.
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apple/swift-clang#261

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
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