Could not find the following Boost libraries: boost_python3

安裝Boost.NumPy時報錯：

CMake Error at /usr/share/cmake/Modules/FindBoost.cmake:1794 (message):
  Unable to find the requested Boost libraries.

  Boost version: 1.61.0

  Boost include path: /usr/include

  Could not find the following Boost libraries:

          boost_python3

  Some (but not all) of the required Boost libraries were found.  You may
  need to install these additional Boost libraries.  Alternatively, set
  BOOST_LIBRARYDIR to the directory containing Boost libraries or BOOST_ROOT
  to the location of Boost.
Call Stack (most recent call first):
  ycm/CMakeLists.txt:202 (find_package)


Using external libclang: /usr/lib64/libclang.so.3.8
-- Found PythonInterp: /usr/bin/python3.5 (found version "3.5.2") 
-- Configuring incomplete, errors occurred!
See also "/home/bstaletic/ycmd/CMakeFiles/CMakeOutput.log".
See also "/home/bstaletic/ycmd/CMakeFiles/CMakeError.log".
其實是boost安裝的時候Python的環境變量不是python3.5
把環境變量改成python3.5后，再安裝Boost,然后安裝boost_numpy就不報這個錯了。
更改環境變量也很簡單。
ln -s Python3.5 /usr/bin/python