VMS Help CC, Messages, PRAGMA  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Message        Strict standard C extension:  A #pragma directive was
                encountered.

 Description    As the purpose of a #pragma directive is to specify
                implementation-defined behavior, it is likely that
                other C compilers will not treat this pragma in the
                same way Compaq C/C++ will.

 User Action    Be aware of this if you wish to port the program.