On i386 with source of Oct  7 07:36 GMT, I get

/usr/src/tools/obj.i386/tools.NetBSD-1.6I-i386/bin/i386--netbsdelf-gcc  -ffreestanding  -pipe -Werror -Wall -Wno-main -Wno-format-zero-length -Wpointer-arith -Wmissing-prototypes -Wstrict-prototypes -Wno-uninitialized  -Di386 -I.  -I/usr/src/sys/arch -I/usr/src/sys -nostdinc -DLKM -DMAXUSERS=32 -D_KERNEL -D_KERNEL_OPT   -c /usr/src/sys/dev/pci/if_pcn.c
/usr/src/sys/dev/pci/if_pcn.c: In function `pcn_init':
/usr/src/sys/dev/pci/if_pcn.c:1767: internal error--unrecognizable insn:
(insn 644 643 646 (set (reg:SI 170)
        (unspec:SI[ 
                (const_int 512 [0x200])
            ]  5)) -1 (nil)
    (nil))
cpp0: output pipe has been closed


while trying to build.sh -R /release/i386. This is on a system running a kernel
and world of this vintage - make build just worked fine. ISTR someone having
had that and "it going away after a cvs update", but that is a while ago now..

Any thoughts? (The successfully running kernel doesn't have AMD PCnet-PCI
Ethernet enabled)

Cheers,

Patrick