sparc64-unknown-linux-gnu crashes in QEMU

[asomers]

rust-lang/libc#1235 added an integration test with the test harness enabled. It's libc's first integration test that uses the test harness, and it's failing on sparc with a SIGILL even though there are no tests enabled for that architecture. @gnzlbg thinks that the bug might lie in rustc, not QEMU.

[nagisa]

This is a QEMU issue. rustc works fine on real hardware.

Tested by your’s truly.

[gnzlbg]

@nagisa thank you !

do you happen to know if there is a bug open in qemu upstream ? @asomers we might want to track that, and re-enable the tests once we upgrade the Docker containers to a newer version of qemu with the fix.

[nagisa]

Don't know any bugs upstream, now I have looked for any, nor I have investigated what exactly makes it not work.