swiftlang/swift-package-manager

dsymutil emits warnings with experimental lto mode

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#6,890 建立於 2023年9月12日

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 (5 留言) (0 反應) (0 負責人)Swift (10,145 star) (1,462 fork)batch import
bughelp wanted

描述

When using --experimental-lto-mode=full dsymutil complains about not being able to find (intermediate?) object files created during the LTO process. Example:

$ git clone git@github.com:apple/swift-nio.git
$ cd swift-nio
$ swift build --configuration release --experimental-lto-mode=full --verbose
warning: (arm64) /tmp/lto.o unable to open object file: No such file or directory
warning: (arm64)  could not find object file symbol for symbol _$sSo14_sa_DoubleWordaMa
warning: (arm64)  could not find object file symbol for symbol _$sSo14_sa_DoubleWordaMaTm
...

貢獻者指南

技術棧
swift
領域
build systemcli
議題類型
bug
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
3
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
1-2 days
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
clear
前置要求
Swift programmingSwift package manager usageBasic understanding of LTO
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
45
研究方向
Investigate how the swift build command handles LTO mode and passes object files to dsymutil. Check the CI logs for similar warnings. Look at the BuildOptions handling in the Swift Package Manager source code to see if there is a missing step to preserve LTO object files.