Gentoo's Bugzilla –
Attachment 336942 Details for
Bug 454228sys-kernel/hardened-sources-3.2.37-r2 fails to build for ia64: mm/mmap.c:1689:4: error: too few arguments to function ‘check_heap_stack_gap’, mm/mmap.c:1732:3: error: too few arguments to function ‘skip_heap_stack_gap’