I have altetred some CFLAGS and was doing a emerge -e world when imagemagick failed to compile. After I fixed that, doing emerge -e world wants to rebuild all the ~100 packages that was already emerged when imagemagick failed. Is there any way to continue where it failed?
--resume (and --skipfirst) option doesn't depend on terminals. Not on 2.1, at least. You just need not to start any new emerge, for it is the just last emerge what can be resumed.