1. get Boost source code from its official web site.
2. download bjam source codes, which is required to build Boost binaries.
3. build bjam. In my environment, mingw compiler is used. type:
 build.bat mingw
 actually the build.bat is smart enough to detect the right compiler
 at this point, we get bjam at it’s bin.ntx86 dir.
4. build boost. enter boost’s source dir, type:
  bjam –toolset=gcc
  make bjam compiled above, can be accessedwe should specifiy toolset as
  it will be msvc by default that’s not what we expect.
5. to enable content assist, it would better change indexer to full.