[SR-7959] Error building Swift compiler using Xcode 10

[swift-ci]

Previous ID	SR-7959
Radar	rdar://problem/45590840
Original Reporter	MonocularVision (JIRA User)
Type	Bug

Environment

• Xcode 10.0 - Build version 10L176w

• Tried on macOS High Sierra 10.13.4 and 10.13.5

• cmake version 3.11.3 (installed via Homebrew)

• ninja version 1.8.2 (installed via Homebrew)

Additional Detail from JIRA

Votes	0
Component/s	Compiler
Labels	Bug
Assignee	None
Priority	Medium

md5: 3bd01874af13837cda50533bb500a2a6

is duplicated by:

• SR-9538 Can't build compiler for Xcode

Issue Description:

When building the Swift compiler with with debug symbols for Xcode using the following command:

utils/build-script --debug --xcode

I get the following error:

error: Build input file cannot be found: '/Users/mcmcguir/github/swift-source/build/Xcode-DebugAssert/swift-macosx-x86_64/stdlib/public/stubs/8/SwiftNativeNSXXXBase.mm'

Excluding the --xcode parameter builds successfully:

utils/build-script --debug

[CodaFi]

There may be a race condition with gyb build products. If you re-run the build you should not see this error again.

[swift-ci]

Comment by Michael McGuire (JIRA)

I ran it several times. I also did it on multiple machines and got the same error.

[CodaFi]

Remove the entirety of /Users/mcmcguir/github/swift-source/build/Xcode-DebugAssert/swift-macosx-x86_64/stdlib/public/stubs/8 and re-run.

[swift-ci]

Comment by Giuseppe Lanza (JIRA)

It happened to me too. After checking that the folder exists, I re-run the build and it passed the error point. The build got stuck for other reasons toh. Opened a new bug for those: https://bugs.swift.org/browse/SR-7961

[swift-ci]

Comment by Michael McGuire (JIRA)

I removed /Users/mcmcguir/github/swift-source/build/Xcode-DebugAssert/swift-macosx-x86_64/stdlib/public/stubs/8 and tried again and failed at the same place. I've re-run it several times and now get the error in SR-7961 mentioned above.