okay, thanks for your help/time.
at least now I have learnt something for my future projects
ps: I have not used 'ldconfig', but I have been using 'ld' specifically. I've been browsing the manual but I don't even know what I really did (like I said earlier, 'random' commands). Maybe I have misguided you by not mentioning this before, and perhaps you might come up with something we left unchecked. If not, too bad, and I will leave apache as it is.