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https://www.peterdavehello.org/2013/05/%e5%8e%9f%e4%be%86hiphop-vmhhvm%e4%b8%8d%e6%94%af%e6%8f%b4-32-bit-%e7%9a%84%e7%92%b0%e5%a2%83/
原來HipHop VM(HHVM)不支援 32-bit 的環境 ...