besides
we are experimenting problems supporting Ada's exceptions on Irix with
gcc v4.7.1
http://www.downthebunker.xyz/wonderland/reloaded/bazaar/viewtopic.php?f=33&…
it's not clear if the problem is related to gcc, rather than to binutils
here some hints found on the internet (but it's an old news, 2005)
http://93.55.217.0/wonderland/chunk_of/stuff/public/retrocomputing/sgi/dev/…