[test] Mark tests unsupported on all Linux flavors

[modocache]

Autolinking was added to the frontend in 22912bc. It was disabled on Linux in 198402d, and further constrained to be disabled on "linux-gnu" in 83b4384. Since then, more flavors of Linux have become supported by Swift: "linux-gnueabihf" in 4bf81e0, and "freebsd" in f41b791.

Autolinking most likely does not work on any of these platforms, so mark it as unsupported for now.

---

Why this test is not supported on Linux is beyond my depth. Advice on how to support this test in the future would be greatly appreciated!

/cc @hpux735

[gribozavr]

That's because Linux uses a different autolinking mechanism, based on swift-autolink-extract.

[gribozavr]

@modocache Could you add that as a comment to the test near the lines that disable it? It would help future maintainers.

[hpux735]

Nice work! I just finished running the test suite on linux-gnueabihf and it works as expected.

[modocache]

@gribozavr Updated! Thanks for the advice.

It might be useful to expand test/lit.cfg to make it easier to disable tests on all non-Darwin machines. Perhaps something like REQUIRES: OS=darwin?

[hpux735]

I noticed a few more similar cases, and added your fix to them.

wdillon@tegra-ubuntu:~/swift$ ack-grep "UNSUPPORTED: OS=linux-gnu"
test/Interpreter/repl_autolinking.swift
10:// UNSUPPORTED: OS=linux-gnu
11:// UNSUPPORTED: OS=linux-gnueabihf

test/ClangModules/autolinking.swift
14:// UNSUPPORTED: OS=linux-gnu
15:// UNSUPPORTED: OS=linux-gnueabihf

test/Serialization/autolinking.swift
23:// UNSUPPORTED: OS=linux-gnu
24:// UNSUPPORTED: OS=linux-gnueabihf

test/Frontend/embed-bitcode.swift
7:// UNSUPPORTED: OS=linux-gnu
8:// UNSUPPORTED: OS=linux-gnueabihf

test/DebugInfo/ASTSection_ObjC.swift
14:// UNSUPPORTED: OS=linux-gnu
15:// UNSUPPORTED: OS=linux-gnueabihf

Adding these brings the failing tests on arm-linux+gold to 9.

[modocache]

@hpux735 Awesome! test/ClangModules/autolinking.swift and test/DebugInfo/ASTSection_ObjC.swift were failing for me on linux-androideabi. Adding those brings me down to 11 failing tests. Would you like to send a pull request for the other files?

[modocache]

It seems like test/DebugInfo/ASTSection_ObjC.swift should have REQUIRES: objc_interop, though. I suppose it's intended to work on any system that supports Objective-C.

[hpux735]

If you need me to, I can send you a PR. However, my repos are in a state of chaos, so it's probably easier for you to do it, if you don't mind.

[modocache]

Can do! 👍

[gribozavr]

Well, it is not strictly dependent on Objective-C interop. It depends on platforms that support autolinking through LLVM. For example, MSVC linker also supports autolinking. I don't know if LLVM can provide the autolinking information in appropriate format.

[modocache]

@gribozavr I amended the commit to incorporate @hpux735's suggestions. It turns out I had already marked ASTSection_ObjC.swift as REQUIRES: objc_interop, though. 😉 326e01b

[modocache]

Thanks!