Use waf to link boost on ubuntu

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http://stackoverflow.com – I'm using waf to build a C++ project on ubuntu 13.10. I try conf.load(boost) in configuration function in wscript, but the result shows it cannot find boost in /lib64. I use apt-get to install libboost. It was installed on /usr/lib/x86_64-gnu-linux. It seems that waf cannot automatically search this directory. How to specify the location when load or check a library in waf. (HowTos)