Does anybody know of a pthread library that works on mac68k-netbsd 1.3.3?

I've tried to build the one from

    ftp://sipb.mit.edu/pub/pthreads/pthreads-1_60_beta6.tar.gz

but this is not happy about 'mac68k-unknown-netbsd1.3.3', does not look like
any 68k ports are in the build.

I have also tried the PTL2 one,

    ftp://ftp.media.osaka-cu.ac.jp/pub/PTL/PTL2/PTL2-current-990319.tar.gz

however this fails during the 'configure' during some 'sed' expansions and
hence leaves the generated
'Makefile's as empty.

Are there any other packages that are known to work?

Regards

Roger Brown