[TriLUG] OT: String.h in g++ around Redhat 5.0

[Guthrie, Joshua L CIV NAVAIRDEPOT]

Sorry for the ignorant off topic question.

Does anyone know if String.h for g++ is roughly the same in/around
Redhat 5.0 era as the more modern g++'s.  I'm getting stuff like
No member function 'String:find(char)' defined
I looked in String.h and didn't find it...
Or is this a symptom of my extremely poor programming... but it compiled
alright on my g++ 3.2
I'm noticing I have do use String instead of string for my
declarations...