Beginning with Irix 6.4 (I think), SGI changed the default procedure
call protocol to the N64 ABI, as they call it.  SR was ported to SGI
using the original "O32" interface, and it does not work with N64.

You can get a working SR system on Irix 6.5 by setting the SGI_ABI
environment variable to "-32" and rebuilding from the beginning
after a "make clean".  The SGI_ABI setting is then also needed when
compiling and running SR programs.

    Gregg Townsend
    November 9, 1998