Hello Kashif,
Instead of running ./ace toolkit, please try the following:
Source the mqsiprofile e.g . ./<install>/server/bin/mqsiprofile
change directory into the tools directory and run ./eclipse
That may give us a better of idea of what is going wrong.
You could be missing some of the GTK libraries that 4.15 eclipse level requires.
Regards Paul.
------------------------------
Paul Lacy
------------------------------