(SYMLINK): Deleted; unused.

(oldobjext): Deleted; no longer used.
(FLAGS_TO_PASS): Include objext and exeext.
(STAGESTUFF, protoize.o, unprotoize.o): Use $(objext), not .o.
(test_protoize_simple, compare{,3}, gnucompare{,3}): Likewise.
(STAGESTUFF, specs, gcc-cross, collect2): Add missing $(exeext).
(libgcc1.null, libgcc[12].a, stage[1-4]): Likewise.
(xgcc, cc1, cc1obj, enquire): Use $@ instead of filename for -o value.
(collect2, mips-tfile, mips-tdump, gen*): Likewise.
(bi-arity, bi-opcode, bi-opname, cccp, cppmain): Likewise.
(protoize, unprotoize, gen-protos, fix-header): Likewise.
(crtbegin.o, crtend.o): Don't use -o; move output to proper
filename (using objext) instead.
(BI_ALL, BC_ALL, bytecode): Deleted; unused.
(bi-*.o, cexp.o, stamp-{proto,fixinc}): Remove unneeded $(srcdir).
(getopt{,1}.o, SYSCALLS.c.X): Likewise.
(install-driver): New target.
(install-normal): Depend on it.
(install-common): Don't depend on xgcc.
(maketest): Deleted; no longer used.
(stage[1-4]): Use name collect-ld, not real-ld.
(risky-stage[1-4]): Use stage[1-4] as dependencies; don't copy.

From-SVN: r9770