AIX 4.3 and COLLECT_EXPORT_LIST

[David Edelsohn]

>>>>> "Smithers, Kit" writes:

Kit> We have both aix 4.2.1 machines and 4.3 machines - is the patch only for 4.3
Kit> onwards?

	This change *could* work on AIX 4.2, but AIX compilers do not make
a distinction for AIX 4.2 (not even an _AIX42 macro), so GCC does not.
Because GCC does not distinguish AIX 4.2 from AIX 4.1, supporting this
interface in AIX 4.2 and above is difficult and cumbersome to implement.

	This change will break backward compatibility, so I am only
planning to make this functionality the default in gcc-3.0 which is
planning to break C++ linkage compatibility anyway.  AIX 4.3 will be
predominant release of AIX by that time.

David