https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66022
--- Comment #1 from James Mason <jrm at exa dot com> --- Using the same machine and shell script (save changing the version variable from "gcc-4.8.4" to "gcc-4.9.2"), a nearly identical failure occurs: gmake[2]: Entering directory `/opt/BUILD-gcc-4.9.2' gmake[3]: Entering directory `/opt/BUILD-gcc-4.9.2' rm -f stage_current gmake[3]: Leaving directory `/opt/BUILD-gcc-4.9.2' Comparing stages 2 and 3 warning: gcc/cc1-checksum.o differs warning: gcc/cc1plus-checksum.o differs Bootstrap comparison failure! gcc/coverage.o differs gcc/asan.o differs gcc/gimple-ssa-strength-reduction.o differs gcc/graphite-poly.o differs gcc/plugin.o differs gcc/ipa-devirt.o differs gcc/sel-sched-ir.o differs gcc/graphite-dependences.o differs gcc/tree-ssa-phiopt.o differs gcc/passes.o differs gcc/graphite-scop-detection.o differs gcc/graphite-clast-to-gimple.o differs gcc/bitmap.o differs gcc/dwarf2cfi.o differs gcc/graphite.o differs gcc/sel-sched.o differs gcc/ggc-common.o differs gcc/store-motion.o differs gcc/graphite-sese-to-poly.o differs gcc/tree-sra.o differs gcc/tree-ssa-uncprop.o differs gcc/graphite-blocking.o differs gcc/ira-costs.o differs gcc/graphite-interchange.o differs gcc/lto/lto.o differs gcc/cfg.o differs gcc/postreload-gcse.o differs gcc/dse.o differs gcc/ira-color.o differs gcc/tree-ssa-sccvn.o differs gcc/graphite-optimize-isl.o differs gcc/tree-into-ssa.o differs gcc/cselib.o differs gcc/tree-ssa-structalias.o differs gcc/tree-ssa-dom.o differs gcc/tree-complex.o differs gcc/tree-eh.o differs gcc/tree-ssa-pre.o differs gcc/haifa-sched.o differs gcc/trans-mem.o differs gcc/tree-cfg.o differs gcc/var-tracking.o differs gcc/tree-ssa-loop-im.o differs gcc/sched-deps.o differs gcc/gcse.o differs gcc/tree-pretty-print.o differs gcc/tree-ssa-tail-merge.o differs gcc/lto-streamer-in.o differs gcc/cp/class.o differs gcc/cp/semantics.o differs gcc/cp/error.o differs gcc/vtable-verify.o differs gcc/alloc-pool.o differs gcc/tree-ssa-threadupdate.o differs gcc/tree-ssa-strlen.o differs gcc/loop-iv.o differs gmake[2]: *** [compare] Error 1 gmake[2]: Leaving directory `/opt/BUILD-gcc-4.9.2' gmake[1]: *** [stage3-bubble] Error 2 gmake[1]: Leaving directory `/opt/BUILD-gcc-4.9.2' gmake: *** [all] Error 2
