One thing I might do as well is add hardlinks in $TOOLDIR/foo--netbsd/bin,
   like binutils and gcc do, for unprefixed names.  This would provide a
   $PATH-able location for getting a cross compiler.


not to make any value- or otherwise judgement on this, but, only some
of the binutils are placed in this directory, and none of GCC:

crocodile-dances ~> ls /usr/local/cross/arm-elf/bin/
ar      as      ld      nm      ranlib  strip



.mrg.