> Is there something that GCC is doing wrong here?

That's probably because of bugs in the old toolchain.

I did a complete build for my LX with

CFLAGS += -mcpu=v8 -mtune=supersparc

in /etc/mk.conf and

makeoptions	COPTS="-O2 -pipe -mcpu=supersparc"

(Simply because I forgot to  update the kernel config after the latest news
in this thread)

and all works fine (though I didn't install a new bootloader). This is with
-current as of yesterday. 


Martin