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Revert "IRGen: Weakly link symbols for unavailable declarations" #64384

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Merged
merged 1 commit into from
Mar 15, 2023
Merged

Revert "IRGen: Weakly link symbols for unavailable declarations" #64384

merged 1 commit into from
Mar 15, 2023

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compnerd
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Reverts #64353

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@swift-ci please test

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CC: @tshortli

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CC: @Azoy

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Error message for ease of finding:

DateComponentsFormatter.swift.obj : fatal error LNK1227: conflicting weak extern definition for '$s10Foundation9FormatterC11objectValueyypSgSSKF'.  New default '.weak.$s10Foundation9FormatterC11objectValueyypSgSSKF.default.$s10Foundation23DateComponentsFormatterC10UnitsStyleO8rawValueAESgSi_tcfC' conflicts with old default '.weak.$s10Foundation9FormatterC11objectValueyypSgSSKF.default.$s10Foundation18ByteCountFormatterC5UnitsV8rawValueSuvg' in ByteCountFormatter.swift.obj

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Sorry about that. Looks like I'll need to avoid making unavailable declarations weak on Windows.

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@tshortli - another option would be to fix up the symbols so that they are coalesced properly through the application of COMDATs. There are examples in IRGen where we do this.

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Azoy commented Mar 15, 2023

This good to go?

@compnerd compnerd merged commit b49f2ef into main Mar 15, 2023
@compnerd compnerd deleted the revert-64353-weak-link-unavailable-symbols branch March 15, 2023 20:09
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@tshortli tshortli tshortli approved these changes

@hborla hborla Awaiting requested review from hborla hborla is a code owner

@slavapestov slavapestov Awaiting requested review from slavapestov slavapestov is a code owner

@xedin xedin Awaiting requested review from xedin xedin is a code owner

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@compnerd @tshortli @Azoy