OriginallyDefinedIn: always use 1.0 as the starting platform version for $ld$previous directives #85600
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@swift-ci please smoke test |
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hey @swiftlang/standard-librarians , please notice that I need to update the ABI baseline for stdlib because of this change. |
…for $ld$previous directives Before this change, we were sometimes using introductory platform version as the starting version where a symbol is considered belonging to the original binary. However, this is insufficient because backdeploying to a platform version prior to a symbol's introductory version can happen. When it happens, we should expect the moved symbol to be found in the moved-from library, not the moved-to one. Expecting the symbol to be found in the moved-to library can lead to crasher. Resolves: rdar://159408187
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nkcsgexi
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nkcsgexi
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…85600 Resolves: rdar://165178683
rjmansfield
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test: update test TBD/linker-directives-ld-previous-ios.swift after #85600
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Before this change, we were sometimes using introductory platform version as the starting version where a symbol is considered belonging to the original binary. However, this is insufficient because backdeploying to a platform version prior to a symbol's introductory version can happen. When it happens, we should expect the moved symbol to be found in the moved-from library, not the moved-to one. Expecting the symbol to be found in the moved-to library can lead to crasher.
Resolves: rdar://159408187