the libbson and the MongoDB C driver is ok.
1.cd mongo-cxx-driver/build
2.cmake .. //got an error

=====================error=====output=======================
– The CXX compiler identification is GNU 5.3.1
– Check for working CXX compiler: /usr/bin/c++
– Check for working CXX compiler: /usr/bin/c++ – works
– Detecting CXX compiler ABI info
– Detecting CXX compiler ABI info - done
– Detecting CXX compile features
– Detecting CXX compile features - done
– No build type selected, default is Release
– The C compiler identification is GNU 5.3.1
– Check for working C compiler: /usr/bin/cc
– Check for working C compiler: /usr/bin/cc – works
– Detecting C compiler ABI info
– Detecting C compiler ABI info - done
– Detecting C compile features
– Detecting C compile features - done
– Checking for module 'libbson-1.0>=1.3.4'
–
CMake Error at /usr/share/cmake-3.5/Modules/FindPkgConfig.cmake:367 (message):
A required package was not found
Call Stack (most recent call first):
/usr/share/cmake-3.5/Modules/FindPkgConfig.cmake:532 (_pkg_check_modules_internal)
cmake/FindLibBSON.cmake:26 (pkg_check_modules)
src/bsoncxx/CMakeLists.txt:67 (find_package)

– Configuring incomplete, errors occurred!
See also "/home/archer/Downloads/mongo-cxx-driver-r3.0.1/build/CMakeFiles/CMakeOutput.log".

===============================end=======================