`utils/build-script --release-debuginfo` on Ubuntu 24.04 with Swift installed with `swiftly` fails

[valeriyvan]

Description

utils/build-script --release-debuginfo on Ubuntu 24.04 with Swift installed with swiftly fails with error:

ninja: error: '/root/.local/share/swiftly/lib/swift/linux/x86_64/swiftrt.o', needed by 'lib/libswiftDemangle.so', missing and 
no known rule to make it                                                                                                      

swiftrt.o is there, but not at the place build-script is looking for it:

find /root/.local/share/swiftly/  -type f -name swiftrt.o
/root/.local/share/swiftly/toolchains/6.1.2/usr/lib/swift/linux/x86_64/swiftrt.o
/root/.local/share/swiftly/toolchains/6.1.2/usr/lib/swift_static/linux/x86_64/swiftrt.o

Reproduction

• make Ubuntu 24.04 e.g. on Digital ocean
• install swiftly
• clone swift
• run cloning script
• launch utils/build-script --release-debuginfo

Expected behavior

If swiftly now is recommended way of installing Swift, build-script should be able to build Swift with it.

Environment

swiftc --version
Swift version 6.1.2 (swift-6.1.2-RELEASE)
Target: x86_64-unknown-linux-gnu

Additional information

No response

[xavgru12]

Could you please try swiftly main branch? I have seen discussions about it before.

[valeriyvan]

Might be a problem of swiftly itself swiftlang/swiftly#333.

[finagolfin]

Are you able to reproduce if you manually unpack the toolchain tarball and add it to your PATH? If not, this is a swiftly incompatibility with the build-script, which you should take up there.