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printf 'Stage 1\n' make clean time -p make -f Makefile.old mv eshtrans.old eshtrans.stage1 printf 'Stage 2\n' make clean cp -p eshtrans.stage1 eshtrans time -p make mv eshtrans eshtrans.stage2 printf 'Stage 3\n' make clean cp -p eshtrans.stage2 eshtrans time -p make mv eshtrans eshtrans.stage3