what is the build environment?
it looks like you are building on linux, which would mean that a cross build isn't really needed.
you can just target the ia64 arch with a standard build rather than use cross-lfs for the build.
I'm currntly building an AMD 64bit lfs system, and using the livecd it's a standard lfs build on the hardware, no targeting needed for the compiling.
but this part here:
means that your build isn't finding libunwind.
all the error message lines are showing an "undefined reference" message, which means ld isn't loading something right.