linux安装mongo c++ driver，出现Checking for C++ library boost_thread-mt

• build mongo-cxx-driver-v2.2

从mongodb官方网站下载mongo c++ driver程序包：mongodb-linux-x86_64-2.2.0.tar。解压后运行scons。

$ cd mongo-cxx-driver-v2.2

$ scons

scons: Reading SConscript files ...

Checking for C++ library boost_thread-mt... no

Checking for C++ library boost_thread... no

出现问题。可见它依赖于boost库。

• 用apt-get安装boost开发和文档库

$ sudo apt-get install libboost-dev libboost-doc

安装成功后，回到mongo-cxx-driver-v2.2目录再次运行scons，现象依旧。

• 用apt-get安装全部boost库

$ sudo apt-get install libboost*

…

The following packages have unmet dependencies:

 libboost-date-time1.42-dev : Conflicts: libboost-date-time1.40-dev but 1.40.0-6ubuntu1 is to be installed

 libboost-filesystem1.42-dev : Conflicts: libboost-filesystem1.40-dev but 1.40.0-6ubuntu1 is to be installed

…

libboost1.42-dbg : Conflicts: libboost1.40-dbg but 1.40.0-6ubuntu1 is to be installed

 libboost1.42-dev : Conflicts: bcp

                    Conflicts: libboost1.40-dev but 1.40.0-6ubuntu1 is to be installed

 libboost1.42-doc : Conflicts: libboost1.40-doc but 1.40.0-6ubuntu1 is to be installed

E: Broken packages

Boost内部依赖出问题，干脆下载源文件自己build。

• 下载boost 1.51版本并build

$ cd boost_1_51_0

$ ./bootstrap.sh

…

$ ./b2

…

$ sudo ./b2 install

…

这个过程很长，需要耐心等待。

• 再次build mongo-cxx-driver-v2.2

build成功后，回到mongo-cxx-driver-v2.2目录再次运行scons，现象依旧。

$ cd mongo-cxx-driver-v2.2

$ scons

…

In file included from /usr/local/include/boost/filesystem/path.hpp:24,

                 from src/mongo/util/paths.h:26,

                 from src/mongo/db/client.h:38,

                 from src/mongo/db/curop.h:23,

                 from src/mongo/db/curop-inl.h:1,

                 from src/mongo/db/instance.h:23,

                 from src/mongo/db/dbmessage.h:25,

                 from src/mongo/client/dbclient_rs.cpp:27:

/usr/local/include/boost/filesystem/config.hpp:16: error: #error Compiling Filesystem version 3 file with BOOST_FILESYSTEM_VERSION defined != 3

scons: *** [build/mongo/client/dbclient_rs.o] Error 1

scons: building terminated because of errors.

看来是文件系统版本不兼容。查阅了资料，mongo c++ driver只支持boost filesystem V2。

Boost官网http://www.boost.org/doc/libs/1_51_0/libs/filesystem/doc/index.htm有这么一段话：

This is Version 3 of the Filesystem library. Version 2 is not longer supported. 1.49.0 was the last release of Boost to supply Version 2。

于是决定安装boost 1.49的版本

• 下载boost 1.49版本并build

成功

• 再次build mongo-cxx-driver-v2.2

$ cd mongo-cxx-driver-v2.2

$ scons

$ sudo scons install

大功告成。现在你可以开始用c++编写操作mongoDB的程序了。