wget https://cmake.org/files/v3.12/cmake-3.12.3.tar.gz

tar -xzf cmake-3.12.3.tar.gz
cd cmake-3.12.

./configure

sudo make && make install

cmake --version    

wget https://github.com/mongodb/mongo-c-driver/releases/download/1.13.0/mongo-c-driver-1.13.0.tar.gz

tar -xzf mongo-c-driver-1.13..tar.gz
mkdir cmake-build
cd cmake-build

cmake -DENABLE_AUTOMATIC_INIT_AND_CLEANUP=OFF -DCMAKE_BUILD_TYPE=Release ..

-- Could NOT find OpenSSL, try to set the path to OpenSSL root folder in the system variable OPENSSL_ROOT_DIR (missing: OPENSSL_CRYPTO_LIBRARY OPENSSL_INCLUDE_DIR)

-- Searching for sasl/sasl.h

--   Found in /usr/include

-- Searching for libsasl2

--   Found /usr/lib/x86_64-linux-gnu/libsasl2.so

-- Detected parameters: accept (int, struct sockaddr *, socklen_t *)

-- Searching for compression library header snappy-c.h
--   Not found (specify -DCMAKE_INCLUDE_PATH=/path/to/snappy/include for Snappy compression)
-- No ICU library found, SASLPrep disabled for SCRAM-SHA- authentication.

-- If ICU is installed in a non-standard directory, define ICU_ROOT as the ICU installation path.
-- SSL disabled
-- Compiling against Cyrus SASL

-- Configuring done

-- Generating done
-- Build files have been written to: /home/yyln2745/studyplace/mongo-c-driver-1.13.0/cmake-build

export OPENSSL_ROOT_DIR=/usr/local/ssl

export OPENSSL_CRYPTO_LIBRARY=/usr/local/ssl/lib

export OPENSSL_INCLUDE_DIR=/usr/local/ssl/include/

1.1.4 安装snappy

snappy用来压缩的。虽然不知道不安装会有什么问题，但是不想像SSL一样，遇到问题了再回头来修，将上面cmake提到的not found的都解决。安装命令：

wget https://github.com/google/snappy/tarball/master

tar -xzf master

cd google-snappy-ea660b5/cmake

cmake ..
// 暂停一下
make

sudo make install

在make前，我们需要先编辑一下CMakeCache.txt，修改CMAKE_CXX_FLAGS:STRING=-fPIC 。为什么要加 -fPIC 呢？因为不这样的话，待会mongo-c-driver执行make时，应该会报以下错误：

/usr/bin/ld: /usr/local/lib/libsnappy.a(snappy.cc.o): relocation R_X86_64_32 against `.rodata' can not be used when making a shared object; recompile with -fPIC

/usr/local/lib/libsnappy.a: error adding symbols: Bad value

collect2: error: ld returned  exit status

src/libmongoc/CMakeFiles/mongoc_shared.dir/build.make:: recipe for target 'src/libmongoc/libmongoc-1.0.so.0.0.0' failed

make[]: *** [src/libmongoc/libmongoc-1.0.so.0.0.] Error

CMakeFiles/Makefile2:: recipe for target 'src/libmongoc/CMakeFiles/mongoc_shared.dir/all' failed

make[]: *** [src/libmongoc/CMakeFiles/mongoc_shared.dir/all] Error

Makefile:: recipe for target 'all' failed

make: *** [all] Error 

关于更多 fPIC 的知识，可另行学习，建议了解一下。

1.1.5 安装ICU

官网：http://www.icu-project.org/download/4.2.html 安装步骤：

wget http://download.icu-project.org/files/icu4c/4.2.1/icu4c-4_2_1-src.tgz

tar -xzf icu4c-4_2_1-src.tgz

cd source

./configure

make

sudo make install

make

sudo make install

[66%]Linking C executable test-libmongoc
/usr/bin/ld: /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o): undefined reference to symbol 'dlclose@@GLIBC_2.2.5'

//lib/x86_64-linux-gnu/libdl.so.2: error adding symbols: DSO missing from command line

collect2: error: ld returned  exit status

src/libmongoc/CMakeFiles/test-libmongoc.dir/build.make:: recipe for target 'src/libmongoc/test-libmongoc' failed

make[]: *** [src/libmongoc/test-libmongoc] Error

CMakeFiles/Makefile2:: recipe for target 'src/libmongoc/CMakeFiles/test-libmongoc.dir/all' failed

make[]: *** [src/libmongoc/CMakeFiles/test-libmongoc.dir/all] Error

Makefile:: recipe for target 'all' failed

make: *** [all] Error 

cmake -DENABLE_AUTOMATIC_INIT_AND_CLEANUP=OFF -DCMAKE_BUILD_TYPE=Release -DENABLE_TESTS=OFF ..

wget -OL https://github.com/mongodb/mongo-cxx-driver/archive/r3.3.1.tar.gz

tar -xzf r3.3.1.tar.gz

cd mongo-cxx-driver-r3.3.1/build

cmake -DCMAKE_BUILD_TYPE=Release -DBSONCXX_POLY_USE_MNMLSTC= -DCMAKE_INSTALL_PREFIX=/usr/local ..

make EP_mnmlstc_core

make
sudo make install

#include <iostream>

#include <bsoncxx/builder/stream/document.hpp>

#include <bsoncxx/json.hpp>

#include <mongocxx/client.hpp>

#include <mongocxx/instance.hpp>

int main(int, char**)

{

    mongocxx::instance inst{};
    //下面uri 请替换成真实数值。

    mongocxx::uri yace_uri{"mongodb://test_username:test_pwd@test_ip:test_port/?authSource=test_db"}; 

    mongocxx::options::client client_options;

    if (yace_uri.ssl()) {

        std::cout << "ssl-----------\n";

    }

    else {

        std::cout << "no-ssl\n";

    }

    mongocxx::client conn{yace_uri};

    mongocxx::database db = conn["test_db"];

    mongocxx::collection gift_test = db["gift_test"];

    bsoncxx::stdx::optional<bsoncxx::document::value> res = gift_test.find_one({});

    if (res)

        std::cout << bsoncxx::to_json(*res) << std::endl;

    return ;

}

c++ --std=c++ test.cpp \

-I/usr/local/include/mongocxx/v_noabi -I/usr/local/include/libmongoc-1.0 \

-I/usr/local/include/bsoncxx/v_noabi -I/usr/local/include/libbson-1.0 \

-L/usr/local/lib -lmongocxx -lbsoncxx -Wl,-rpath,/usr/local/lib