Hi,
     
     I was able to compile your 6.4.2 version on HP/UX 10.20. I had to use 
     the options with-template=hpux_cc and without-cxx. I also had to use 
     flex, because the compile failed with the native lex. I had to 
     hand-edit the makefile to use flex.
     
     Thanks for all your effort!
     
     Sridhar