atlas-3.8.3 fails to properly detect core i7 cpu

[jameskyle@…]

Atlas fails to detect the core i7 CPU and uses default, core Pentium opts instead.

This is indicated by:

ERROR: enum fam=3, chip=2, mach=0
make[3]: *** [atlas_run] Error 44
make[2]: *** [IRunArchInfo_x86] Error 2
ERROR: enum fam=3, chip=2, mach=0
make[3]: *** [atlas_run] Error 44
make[2]: *** [IRunArchInfo_x86] Error 2
ERROR: enum fam=3, chip=2, mach=0
make[3]: *** [atlas_run] Error 44
make[2]: *** [IRunArchInfo_x86] Error 2
ERROR: enum fam=3, chip=2, mach=0
make[3]: *** [atlas_run] Error 44
make[2]: *** [IRunArchInfo_x86] Error 2

[Veence (Vincent)]

Please see #24869. Atlas seems to require gcc45 (gcc44?) in order to work properly on Arrandale CPUs.

[jameskyle@…]

I'm currently building on my new macbook i7 with gcc45, if it builds I'll make 4.5 the default variant and close the ticket.

[jameskyle@…]

Ok, I had a malfunction with my macbook (power cable thing). Anyway, I didnt' finish the build on that platform. However, atlas builds fine with gcc45 on my Mac Pro, so I've added the gcc45 variant, set it as default, and pushing the changes.

[jmroot (Joshua Root)]

Please don't make gcc45 the default variant except in the specific cases where you are sure it's needed. We don't want to end up with #25081 all over again.