1

In Chromium, we're building a bunch of interop tests just fine with Swift5.7. However, when I switch the toolchain to the latest Trunk toolchain, I get a bunch of link errors:

ld64.lld: error: library not found for -lswiftstd
ld64.lld: error: library not found for -lswiftCxx
ld64.lld: error: library not found for -lswiftCompatibility56
ld64.lld: error: library not found for -lswiftstd
ld64.lld: error: library not found for -lswiftCxx
ld64.lld: error: library not found for -lswiftCompatibility56
ld64.lld: error: library not found for -lswiftstd
ld64.lld: error: library not found for -lswiftCxx
ld64.lld: error: library not found for -lswiftCompatibility56
ld64.lld: error: library not found for -lswiftstd
ld64.lld: error: library not found for -lswiftCxx
ld64.lld: error: library not found for -lswiftCompatibility56
ld64.lld: error: library not found for -lswiftstd
ld64.lld: error: library not found for -lswiftCxx
ld64.lld: error: library not found for -lswiftCompatibility56
ld64.lld: error: library not found for -lswiftstd
ld64.lld: error: library not found for -lswiftCxx
ld64.lld: error: library not found for -lswiftCompatibility56
ld64.lld: error: library not found for -lswiftstd
ld64.lld: error: library not found for -lswiftCxx
ld64.lld: error: too many errors emitted, stopping now (use --error-limit=0 to see all errors)

Has anyone seen anything like this? We're definitely not directly including any of these libraries.

2

We figured it out partially, our build system was looking in the wrong place for compat libraries.

https://chromium-review.googlesource.com/c/chromium/src/+/3930584

That said, this still breaks our catalyst build because the compat libraries are not present in the ToT snapshot when building for catalyst. Is this just an oversight?

3

Could you post the error you get when building for Mac Catalyst?

4 
ld64.lld: error: ../../third_party/swift-toolchain/usr/lib/swift/macosx/libswiftCompatibilityConcurrency.a(CompatibilityConcurrency.cpp.o) has platform macOS, which is different from target platform macCatalyst

(Cribbed from chromium | buildbucket/cr-buildbucket/8801593085733033281/+/u/compile/raw_io.output_text_failure_summary_ | LogDog )

5

Hmm, I'm not sure if the open source toolchain builds the Mac Catalyst enabled slices for the compatibility libraries. @edymtt do you happen to know where we stand with Mac Catalyst support?

6

I confirmed that that's indeed the case (i.e. we do not build the Mac Catalyst builds in the open source toolchain yet). I will check to see what we can do to unblock your testing to avoid this issue.

7

Thanks Alex. Should I bother filing a bug at github?

8

For sure, it would be helpful as then we could update it when it's resolved.

9

Filed Open source builds do not support MacCatalyst target · Issue #61418 · apple/swift · GitHub

1 Like
10

There hasn't been any update on the bug, when we might see this in the upstream toolchain?