emerge emacs 出错

brightcxl

错误信息如下：
Finding pointers to doc strings...
Finding pointers to doc strings...done
Wrote /var/tmp/portage/emacs-21.4-r3/work/emacs-21.4/lib-src/fns-21.4.1.el
Dumping under names emacs and emacs-21.4.1
make[1]: *** [emacs] 段错误
make[1]: *** 正在删除文件“emacs”
make[1]: Leaving directory `/var/tmp/portage/emacs-21.4-r3/work/emacs-21.4/src'
make: *** [src] 错误 2

!!! ERROR: app-editors/emacs-21.4-r3 failed.
Call stack:
  ebuild.sh, line 1539:   Called dyn_compile
  ebuild.sh, line 939:   Called src_compile
  emacs-21.4-r3.ebuild, line 118:   Called die

!!! (no error message)
!!! If you need support, post the topmost build error, and the call stack if relevant.

请高手指点，谢谢