latest repo not building?

[Thomas Stüfe]

Hi Rachel, David,

unfortunately a similar issue is hitting us on our Linux powerpc build
machines, which are running Suse Linux Enterprise Server 10. We do not have
support for dynamically sized cpu-sets, so no CPU_ALLOC etc.

Any chance we could make the coding in os::active_processor_count()
dependend on #ifdef CPU_ALLOC, and if not present, fall back to
"sysconf(_SC_NPROCESSORS_ONLN)" ?

Kind Regards, Thomas




On Sat, Jan 30, 2016 at 12:06 AM, David Holmes <david.holmes at oracle.com>
wrote:

> On 30/01/2016 8:43 AM, David Holmes wrote:
>
>> Sorry Rachel, the latest changes I pushed for sched_getaffinity do rely
>> on using at least our official gcc version for building - which is
>> 4.9.2. I was under the (perhaps mistaken) impression that there was
>> already something that prevented us using the older 4.8.x version.
>>
>
> Sorry this is incorrect information. Internally we use devkits which
> combine a specific gcc version with a specific OS version. Our current
> devkit is using gcc 4.9.2, but the sched_getaffinity code depends on the OS
> header files to support dynamic cpu sets (man CPU_SET). I can't say exactly
> which OS versions support this but Linux distributions post 2010 should be
> fine.
>
> So older gcc may be fine, but you need the later OS.
>
> David
>
>
> David
>>
>> On 30/01/2016 4:13 AM, Rachel Protacio wrote:
>>
>>> Hi,
>>>
>>> I just updated a blank repo and tried to build it, but got this error:
>>>
>>>
>>>
>>> /scratch/rprotaci/repos/startuptime/hotspot/src/os/linux/vm/os_linux.cpp:4821:48:
>>>
>>>     error: 'CPU_COUNT_S' was not declared in this scope
>>>             cpu_count = CPU_COUNT_S(cpus_size, cpus_p);
>>>                                                      ^
>>>
>>>
>>> /scratch/rprotaci/repos/startuptime/hotspot/src/os/linux/vm/os_linux.cpp:4824:35:
>>>
>>>     error: 'CPU_COUNT' was not declared in this scope
>>>             cpu_count = CPU_COUNT(cpus_p);
>>>                                         ^
>>>
>>>
>>> /scratch/rprotaci/repos/startuptime/hotspot/src/os/linux/vm/os_linux.cpp:4835:20:
>>>
>>>     error: 'CPU_FREE' was not declared in this scope
>>>           CPU_FREE(cpus_p);
>>>                          ^
>>>
>>> It looks from the history that David edited this file today, but maybe
>>> it's just my problem? Is anyone else running into this?
>>>
>>> Thanks,
>>> RAchel
>>>
>>>