• Fenghua Yu's avatar
    arch/ia64/Makefile: Remove -mtune=merced in IA64 kernel build · bf2a4c72
    Fenghua Yu authored
    Between GCC version 3.4.0 and 4.3.3 (including 3.4.0 and 4.3.3), -mtune=merced
    is implemented in GCC. Starting from 4.4.0, -mtune=merced is deprecated.
    Even implemented in versions between 3.4.0 and 4.3.3, the -mtune=merced
    feature has been broken in some of the versions. For example, GCC 4.1.2 reports
    interanl tuning function errors during kernel building with -mtune=merced. Or
    GCC Bugzilla 16130 reports another -mtune=merced issue on GCC 3.4.1.
    So I would remove the -mtune=merced from IA64 kernel build. Without this option,
    kernel on Merced will remain the same except losing an unstable and out-of-date
    performance tunning feature.
    Since GCC version 3.4.0, -mtune=mckinley has been implemented. The
    -mtune=mckinley option functions the same as mtune=itanium2. And mtune=itanium2
    is the default option. So we don't need to add mtune=mckinley either since its
    been the default option in any GCC version which implements this option.
    Signed-off-by: default avatarFenghua Yu <fenghua.yu@intel.com>