Bug#933045: release.debian.org: rustc can only be cross-compiled on mips; please override "Not built on buildd" blocker

Aurelien Jarno:
> Hi,
> 
> On 2019-07-25 18:47, Ximin Luo wrote:
>> Package: release.debian.org
>> Severity: normal
>>
>> Hi, rustc is currently blocked from migration: 
>>
>> https://qa.debian.org/excuses.php?package=rustc
>>
>> <adsb> no, the issue is
>> <adsb>     Not built on buildd: arch mips binaries uploaded by infinity0
>> <adsb>     Not built on buildd: arch mipsel binaries uploaded by infinity0
>> <kibi> if in doubt → https://release.debian.org/britney/excuses.yaml look for source: rustc and verdicts for that stanza.
> 
> FTR, we are going to remove the mips architecture in the next weeks [1],
> so the problem will be limited to mipsel soon.
> 
> [1] https://lists.debian.org/debian-mips/2019/07/msg00010.html
> 

OK great.

>> <_rene_> infinity0: can't you make it not built with -g or do -g1 or disable some features on mipsen?
>> * _rene_ does the -g1 thingy too, for LO
>> <_rene_> for anything except amd64 (and i386, but I probably should make it for i386, too, given I also ignore test suite failures there by now...)
>> <infinity0> _rene_: i've already tried all of those things
>> <_rene_> mmh, ok
>> <infinity0> and various other llvm options, it's detailed in some thread on pkg-rust-maintainers
>>
>> https://alioth-lists.debian.net/pipermail/pkg-rust-maintainers/2019-January/004844.html
>> https://alioth-lists.debian.net/pipermail/pkg-rust-maintainers/2019-January/004887.html
>> https://github.com/rust-lang/rust/issues/56888
> 
> Reducing the number of threads won't help, as the issue there is not the
> memory available on the buildds (they have 8GB RAM), but the virtual
> memory address space which on 32-bit mips limits the allocated memory
> per process to 2GB. Other 32-bit architectures usually have a 3GB limit
> instead.
> 
> I wonder how much memory is required to build rustc, if we are just
> above 2GB, or already close to 3GB. Depending on that we might need to
> find a solution or add an exception for mipsel only or also for the
> other 32-bit architectures (armel, armhf, i386).
> 

We don't see OOMs on any other architecture, only 32-bit mips. It is only necessary to add an exception for 32-bit mips.

(We already reduce the amount of debuginfo generated on armhf armel mips mipsel powerpc powerpcspe, it seems to help arm* but not mips*.)

X