Bug#849657: [Ceph-maintainers] Bug#849657: ceph: FTBFS on mips(el): g++: virtual memory exhausted: Cannot allocate memory

On 05/01/17 14:00, Gaudenz Steinlin wrote:
> 
> Hi
> 
> Aurelien Jarno <[email protected]> writes:
> 
>> On 2016-12-30 10:06, Emilio Pozuelo Monfort wrote:
>>> On 29/12/16 20:56, Gaudenz Steinlin wrote:
>>
>> The problem is indeed a memory issue, not that the buildd doesn't have
>> enough memory, but just that you can allocate only 2GB per process on a
>> 32-bit MIPS machine. As Emilio said, the above GCC flag should help to
>> reduce the memory usage by running the garbage collector more often.
>>
>> However gcc 6.3 seems to have improved the situation a bit, so I given
>> back the packages, I hope they will build now. Otherwise I have a patch
>> ready to change the GCC defaults. That said GCC upstream consider it's a
>> bug in the garbage collector [1], so that should be fixed instead and the
>> patch should be considered as a temporary workaround.
>>
> 
> Aurelien thanks for taking care and resheduling the build. Unfortunately
> this did not solve the problem. But setting the following variables
> solves the virtual memory issue for me on the mipsel porterbox (eller):
> 
> export DEB_CFLAGS_MAINT_APPEND= --param ggc-min-expand=10 -O1
> export DEB_CXXFLAGS_MAINT_APPEND= --param ggc-min-expand=10 -O1
> export DEB_CFLAGS_MAINT_STRIP= -O2
> export DEB_CXXFLAGS_MAINT_STRIP= -O2
> 
> But unfortunately the build fails at another point. See the log below.
> I'm not sure how to fix this. If I understand it right these atomic
> operations are just not supported on mipsel[1]. Or is there a way to make
> them work?

They are supported. You are probably missing -latomic.

Cheers,
Emilio