Sorry for relpying to myself.

I just tried that you *CAN* compile the tools when you're build from  
NetBSD 3.1:


===> Tools built to /usr/alphatools
===> build.sh ended:   Wed May 23 11:17:12 CEST 2007
===> Summary of results:
          build.sh command: ./build.sh -T /usr/alphatools -O /usr/ 
alphaobj -D /usr/alphabuild tools
          build.sh started: Wed May 23 10:04:20 CEST 2007
          NetBSD version:   4.0_BETA2
          MACHINE:          alpha
          MACHINE_ARCH:     alpha
          Build platform:   NetBSD 3.1_STABLE alpha
          HOST_SH:          /bin/sh
          No /usr/alphatools/bin/nbmake, needs building.
          Bootstrapping nbmake
          TOOLDIR path:     /usr/alphatools
          DESTDIR path:     /usr/alphabuild
          RELEASEDIR path:  /usr/alphaobj/releasedir
          Created /usr/alphatools/bin/nbmake
          makewrapper:      /usr/alphatools/bin/nbmake-alpha
          Updated /usr/alphatools/bin/nbmake-alpha
          Tools built to /usr/alphatools
          build.sh ended:   Wed May 23 11:17:12 CEST 2007
===> .

However, if you allready run NetBSD 4.0_BETA2, you still cannot (cvs  
update just an hour ago).

I files PR #36368 for this.

Cheers,

   Torsten

--
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
<>                                                              <>
<> Torsten Harenberg         harenberg@physik.uni-wuppertal.de  <>
<> Bergische Universitaet                                       <>
<> FB C - Physik             Tel.: +49 (0)202 439-3521          <>
<> Gaussstr. 20              Fax : +49 (0)202 439-2811          <>
<> 42097 Wuppertal                                              <>
<>                                                              <>
<><><><><><><>< Of course it runs NetBSD http://www.netbsd.org ><>