egcs-980308 fails to build on Solaris 2.5

[Hyman Rosen]

Here's part of the error listing:

./frame.c: In function `execute_cfa_insn':
./frame.c:663: internal error--unrecognizable insn:
(jump_insn 615 614 616 (addr_diff_vec:SI (label_ref:SI 614)
        [ 
            (label_ref:SI 620)
	    ... (a bunch more)
            (label_ref:SI 576)
        ] 
        (const_int 0)
        (const_int 0) 0) -1 (nil)
    (expr_list:REG_BR_PRED (const_int 12)
        (nil)))
xgcc: Internal compiler error: program cc1 got fatal signal 6