Did you do a Clean and Build ?
But I guess you did ... ;-)
Now I am (nearly) out of ideas ! Few remain.
It would be nice if I could get access to an (or yours) AIX server through SSH. Makes testing easier.
Second, I am preparing a new release of fpcupdeluxe. It will build a cross-compiler for AIX. With settings I know about. I would like you to try to use that to install FPC and Lazarus, and the AIX cross-compiler. But please be patient. The release will take another couple of hours. Will inform you !
Ps:
To add linker options, do:
-k-rpath-link -k/usr/lib