gcc-200009xx bootstrap comparison failure on i686-linux since 20000906

[Horst von Brand <vonbrand at sleipnir dot valparaiso dot cl>]

i686, Red Hat 6.9.5, linux-2.4.0-testX, binutils-2.10.0.24 from H. J. Lu's
sources.

Full build from CVS sources using "-O2 -fomit-frame-pointer -march=i686",
configured with --enable-{shared,haifa,threads}. Perhaps I'm configuring
something wrong?

[Yes, I know about "don't use non-standard build flags". I also know my
 setup is far from standard.]

I'm seeing the following comparison failures between stages 2 and 3 on
20000909 (problem started between 04 and 06):

c-lex.o differs
combine.o differs
c-parse.o differs
cse.o differs
dce.o differs
dependence.o differs
doloop.o differs
dwarf2out.o differs
dwarfout.o differs
emit-rtl.o differs
except.o differs
expmed.o differs
expr.o differs
fold-const.o differs
function.o differs
gcov.o differs
genattrtab.o differs
genrecog.o differs
ggc-common.o differs
i386.o differs
ifcvt.o differs
insn-emit.o differs
insn-output.o differs
jump.o differs
local-alloc.o differs
loop.o differs
optabs.o differs
profile.o differs
real.o differs
recog.o differs
reg-stack.o differs
sbitmap.o differs
simplify-rtx.o differs
ssa.o differs
tradcif.o differs
tradcpp.o differs
varasm.o differs
ch/parse.o differs
cp/class.o differs
cp/error.o differs
cp/mangle.o differs
cp/optimize.o differs
cp/parse.o differs
cp/pt.o differs
cp/tree.o differs
f/bad.o differs
f/fini.o differs
f/intrin.o differs
java/jcf-write.o differs
java/parse.o differs
java/parse-scan.o differs
java/xref.o differs
-- 
Horst von Brand                             vonbrand@sleipnir.valparaiso.cl
Casilla 9G, Vin~a del Mar, Chile                               +56 32 672616