I emerged it on a 2.2GHz P4 earlier this week and it took longer than 4 hours. In fact, I think it took longer than my original `emerge system` based on my (purely subjective) recollection. Unfortunately I didn't keep track since I went to bed, but my SWIG is that it's somewhere between 4 and 8 hours.
You can check the compile times with genlop.
# emerge genlop # genlop -t openoffice
bye, christoph
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