Bug#881845: rustc: FTBFS on mips*: test failures

On 17/11/17 13:25, James Cowgill wrote:
> Hi,
> 
> On 15/11/17 17:30, Emilio Pozuelo Monfort wrote:
>> Source: rustc
>> Version: 1.21.0+dfsg1-3
>> Severity: important
>>
>> Hi,
>>
>> Sometime ago I asked about rustc bootstrap status on mips*:
>>
>> 17:08 < infinity0> mips* fail many tests last time i tried, ~3 months ago, i didn't want to ship it, i haven't had time to check since
>>
>> >From https://buildd.debian.org/status/fetch.php?pkg=rustc&arch=mips&ver=1.14.0%2Bdfsg1-3&stamp=1484077706&raw=0
>>
>> test net::tcp::tests::timeouts ... FAILED
>> test net::udp::tests::timeouts ... FAILED
>> test sys::imp::ext::net::test::timeouts ... FAILED
>>
>> Looks like timeouts are broken on rust/mips?
>>
>> mips64el has different errors:
>>
>> test f32::f32::tanh_0 ... FAILED
>> test f64::f64::tanh_0 ... FAILED
>> test io::error::Error::from_raw_os_error_0 ... FAILED
>>
>> Maybe the mips porters can take a look? (debian-mips@ on Cc). Note those
>> errors are for 1.14.0, you'll want to try with a newer version first and
>> see what's the current status.
> 
> I just tried building the latest rustc on mips64el. As I expected, I hit
> this LLVM bug again where any code using atomics will hang:
> 
> https://bugs.llvm.org/show_bug.cgi?id=32020
> 
> I'll see if I can get Simon to have a look at it again.

FTR:

According to our conversation over IRC, there's a patch for the above bug, but
mips64el is now affected by https://github.com/rust-lang/rust/issues/47290

mips(el) may be fine now with that patch, or they may not :P

Cheers,
Emilio