* Library routines
*
CRC-CCITT functions (CRC_CCITT) [N/m/y/?] (NEW) n
CRC32 functions (CRC32) [Y/?] y
CRC32c (Castagnoli, et al) Cyclic Redundancy-Check (LIBCRC32C) [M/n/y/?] m
  SPLIT   include/linux/autoconf.h -> include/config/*
  CC      scripts/mod/empty.o
scripts/mod/empty.c:1: error: CPU you selected does not support x86-64 instruction set
scripts/mod/empty.c:1: error: CPU you selected does not support x86-64 instruction set
make[2]: *** [scripts/mod/empty.o] Error 1
make[1]: *** [scripts/mod] Error 2
make: *** [scripts] Error 2

!!! ERROR: sys-kernel/linux-headers-2.6.11-r2 failed.
Call stack:
  ebuild.sh, line 1539:   Called dyn_compile
  ebuild.sh, line 939:   Called src_compile
  ebuild.sh, line 1248:   Called kernel-2_src_compile
  kernel-2.eclass, line 1046:   Called compile_headers
  kernel-2.eclass, line 458:   Called die

!!! prepare failed
!!! If you need support, post the topmost build error, and the call stack if relevant.

Exception received:
Stage1Error :FATAL: stage1: Bootstrapping failed!
Please submit a bug report (after searching to make sure it's not a known issue and verifying you didn't do something stupid) with the contents of /var/log/install.log and /tmp/installprofile.xml and the version of the installer you used