[oe] busybox-static linking failed

[Steffen Sledz]

After a long time i tried to build an initramfs image containing
busybox-static which fails to link (besides some warnings) with these
errors:

/home/OE/tmp.3/work/armv5te-angstrom-linux-gnueabi/busybox-static-1.11.3-r22.1/busybox-1.11.3/networking/libiproute/iptunnel.c:189:
undefined reference to `__cpu_to_be16'
/home/OE/tmp.3/work/armv5te-angstrom-linux-gnueabi/busybox-static-1.11.3-r22.1/busybox-1.11.3/networking/libiproute/iptunnel.c:190:
undefined reference to `__cpu_to_be16'
/home/OE/tmp.3/work/armv5te-angstrom-linux-gnueabi/busybox-static-1.11.3-r22.1/busybox-1.11.3/networking/libiproute/iptunnel.c:202:
undefined reference to `__cpu_to_be16'
/home/OE/tmp.3/work/armv5te-angstrom-linux-gnueabi/busybox-static-1.11.3-r22.1/busybox-1.11.3/networking/libiproute/iptunnel.c:214:
undefined reference to `__cpu_to_be16'
/home/OE/tmp.3/work/armv5te-angstrom-linux-gnueabi/busybox-static-1.11.3-r22.1/busybox-1.11.3/networking/libiproute/iptunnel.c:224:
undefined reference to `__cpu_to_be16'
networking/libiproute/lib.a(iptunnel.o):/home/OE/tmp.3/work/armv5te-angstrom-linux-gnueabi/busybox-static-1.11.3-r22.1/busybox-1.11.3/networking/libiproute/iptunnel.c:225:
more undefined references to `__cpu_to_be16' follow

This is really obscure for me because i can't identify the code lines
responsible for them. :(

Steffen