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

On 29/12/16 20:56, Gaudenz Steinlin wrote:
> 
> Hi Emilio
> 
> Emilio Pozuelo Monfort <[email protected]> writes:
> 
>> Source: ceph
>> Version: 10.2.5-2
>> Severity: serious
>>
>> Your package failed to build on mips/el:
>>
>> g++ -DHAVE_CONFIG_H -I.  -D__CEPH__ -D_FILE_OFFSET_BITS=64 -D_THREAD_SAFE -D__STDC_FORMAT_MACROS -D_GNU_SOURCE -DCEPH_LIBDIR=\"/usr/lib/mipsel-linux-gnu\" -DCEPH_PKGLIBDIR=\"/usr/lib/mipsel-linux-gnu/ceph\" -DGTEST_USE_OWN_TR1_TUPLE=0 -D_REENTRANT    -Wdate-time -D_FORTIFY_SOURCE=2 -I/usr/include/nss -I/usr/include/nspr  -Wall -Wtype-limits -Wignored-qualifiers -Winit-self -Wpointer-arith -Werror=format-security -fno-strict-aliasing -fsigned-char -rdynamic -ftemplate-depth-1024 -Wnon-virtual-dtor -Wno-invalid-offsetof -O2 -g -pipe -Wall -Wp,-U_FORTIFY_SOURCE -Wp,-D_FORTIFY_SOURCE=2 -fexceptions --param=ssp-buffer-size=4 -fPIE -fstack-protector-strong      -Wstrict-null-sentinel -g -O2 -fdebug-prefix-map=/«PKGBUILDDIR»=. -fstack-protector-strong -Wformat -Werror=format-security -c -o t
 ools/rbd/action/Resize.o tools/rbd/action/Resize.cc
>> virtual memory exhausted: Cannot allocate memory
>> Makefile:24792: recipe for target
>> 'test/encoding/ceph_dencoder-ceph_dencoder.o' failed
> 
> I already noticed this and tried to contact [email protected] and
> [email protected]. Unfortunately nobody responded yet, so I don't
> know if the message was even received or not. AFAIK these are the
> correct contact points for buildd issues.

This is not a buildd issue but a porting issue. debian-mips@ldo is better for
this. Added to Cc.

> I don't think there is much I can do about this bug and I'm not
> convinced this is a issue in ceph. If the buildds are unable to build
> the package we can either completely remove ceph for mips/mipsel or try
> to only build the client part and have a reduced set of packages on
> these architectures.

IIRC there are some flags you can pass to reduce memory usage. Most notably
ggc-min-expand (which is going to be changed in GCC itself, but afaik it hasn't
happened yet). So you could try adding

--param ggc-min-expand=10

to CFLAGS/CXXFLAGS.

I'd try that before thinking about removing the package from mips.

Cheers,
Emilio

> The second option would have the advantage that no changes to the
> reverse dependencies (notably qemu) are needed.
> 
> Gaudenz
>