Gnat 3.15p pragma issues

["Erik Woulfe" <DMBTonic@AOL.com>]

I am attempting to move a large amount of code from an Apex compiler
system to the Gnat 3.15p compiler in order to gain more flexibility in
mutli-language code interaction (namely between C++ and Ada). One of
the problems that I encounter when making this move is that the Gnat
compiler does not recognize many of the pragma statements that Apex had
no problems with. However, I do not think that any/all of these are
Apex specific, such as pragma "Inline" and pragma "Not_Elaborated". Has
anyone had any experience with having common pragmas not being
recognized? Am I perhaps not referencing the correct libraries in my
gnatmake call?

Thanks for any help.