I was able to emerge newlib-1.18.0 for CTARGET=arm-elf using crossdev by copying the 1.16.0 ebuild, without modification.
# cp ../sys-libs/newlib/newlib-1.16.0.ebuild sys-libs/newlib/newlib-1.18.0.ebuild
# crossdev -t arm-elf --gcc 4.4.3 --libc 1.18.0 --without-headers
It is broken at least for the target spu-elf, do you have specific needs to have it bumped?
(In reply to comment #1)
> It is broken at least for the target spu-elf, do you have specific needs to
> have it bumped?
Yes. See bug #290793 "sys-libs/newlib-1.16.0 fails for thumbless elf targets"
seems that .18 has a parallel make issue, maybe the same as the .16
I couldn't reproduce the issue, newlib-1.18.0 in portage