latest repo not building?

[David Holmes]

Hi Thomas,

On 4/02/2016 12:58 AM, Thomas Stüfe wrote:
> 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)" ?

I will file a bug for this, mainly because it will then allow the code 
to be directly backported to 8u - where the official build platforms 
also do not support this.

How old is SLES 10?

David
-----

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