compile error with gcc2.95

[Frank Liu]

when I compile the latest released version of ddd (3.3.1) using
gcc2.95 on qnx rtp OS, it gives:
...
strclass.h:456: use of `string' is ambiguous
strclass.h:451:   first declared as `class string' here
strclass.h:460: syntax error before `&'
strclass.h:465: parse error before `&'
strclass.h:466: parse error before `&'
strclass.h:476: parse error before `&'
strclass.h:476: `subString::operator =(...)' must take exactly one argument
strclass.h:484: parse error before `&'
strclass.h:502: confused by earlier errors, bailing out

any ideas how to fix it?
Thanks!
Frank