Boost provides free peer-reviewed portable C++ source libraries. In a word, Productivity. Use of high-quality libraries like Boost speeds initial development, results in fewer bugs, reduces reinvention-of-the-wheel, and cuts long-term maintenance costs. And since Boost libraries tend to become de facto or de jure standards, many programmers are already familiar with them.
How to install?
2../bootstrap.sh; ./b2 -j12 install –prefix=/path/to/your/directory (link=shared)
5.编译：gcc/g++ -L/path/to/your/directory/lib -lxxx a.cpp -o a