>> If useful, here is my mk.conf (also tried everything here, including 
>> not having one
>> at all):
>>
>> CFLAGS=-O -march=pentium4 -mfpmath=sse -pipe
>> WRKOBJDIR=/var/tmp/pkg
>> X11_TYPE=xorg
>
> Here's a bunch of quick hacks :)
>
> First of all, I don't use tools, so in etc/mk.conf I have:
> MKTOOLS=no
> USETOOLS=never
>
> Second, try to build and install flex:
> cd /usr/src/usr.bin/lex
> make dependall MKSHARE=no
> make install MKSHARE=no
>
> If that does not work, first try:
> cd /usr/src/share/mk
> make install
> cd /usr/src
> make includes
>
> Let me know where these get you
>
> Kind regards,
> Adam
>
>
> P.S.: As for CFLAGS, I recommend:
> COPTS+=-Os -pipe -mcpu=pentium4 -fomit-frame-pointer
> CFLAGS+=${COPTS}

tho sparc(64), amiga, macppc, arm, sgimips and next68k on my side only:

try to omit -pipe... ;)

-- 
:x!

timo