hdf5_ep

[svn-r7277] Purpose:
    Bug Fix

Description:
    C++ on Irix 6.5 needs some special libraries (libCio or some such
    thing). These were defined using the DEFAULT_LIBS macro. However,
    they weren't being placed into the Makefiles since it wasn't
    AC_SUBST'ed in configure.in and wasn't declared in commence.in.

Solution:
    Added to configure.in and also added and commence.in

Platforms tested:
    Modi4 (C++, small change and only Irix specific)

Misc. update: