I compiled version 2.3.4 on hp-ux 11i, with shared and 
threads enabled, using Gnu c 3.3.3.
'make test' fails on all tests that use readline() and/or 
readlines() and test_univnewlines fails with a memory 
fault and core dump. All other tests pass that I expect 
to pass.
If I hand modify pyconfig.h to comment out with 
universal newline support and recompile (after a make 
clean) then the readline(s) failures go away.
I have also compiled without thread support and got the 
same failures as with using universal newlines.