解决Ubuntu16.04上QT5.7开发QMYSQL数据库 mysql drivers not loaded问题

Qmsql not loaded ：平台 qt5.7  Ubuntu16.04

no@no-70MYA004CN:~$ cd /home/no/Qt5.7.0/5.7/gcc_64/plugins/sqldrivers

no@no-70MYA004CN:~/Qt5.7.0/5.7/gcc_64/plugins/sqldrivers$ ldd libqsqlmysql.so

（上面指令查看所有依赖关系）

./libqsqlmysql.so: /lib/x86_64-linux-gnu/libmysqlclient_r.so.16: no version information available (required by ./libqsqlmysql.so)

linux-vdso.so.1 => (0x00007fffdd4d8000)

libmysqlclient_r.so.16 => /lib/x86_64-linux-gnu/libmysqlclient_r.so.16 (0x00007f0090e49000)

libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f0090c2f000)

libcrypt.so.1 => /lib/x86_64-linux-gnu/libcrypt.so.1 (0x00007f00909f7000)

libnsl.so.1 => /lib/x86_64-linux-gnu/libnsl.so.1 (0x00007f00907de000)

libssl.so.10 => /lib/x86_64-linux-gnu/libssl.so.10 (0x00007f0090575000)

libcrypto.so.10 => /lib/x86_64-linux-gnu/libcrypto.so.10 (0x00007f0090131000)

libQt5Sql.so.5 => /home/no/Qt5.7.0/5.7/gcc_64/plugins/sqldrivers/./../../lib/libQt5Sql.so.5 (0x00007f008feec000)

libQt5Core.so.5 => /home/no/Qt5.7.0/5.7/gcc_64/plugins/sqldrivers/./../../lib/libQt5Core.so.5 (0x00007f008f7d1000)

libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f008f5b4000)

libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f008f232000)

libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f008ef29000)

libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f008ed13000)

libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f008e949000)

libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f008e745000)

libicui18n.so.56 => /home/no/Qt5.7.0/5.7/gcc_64/plugins/sqldrivers/./../../lib/libicui18n.so.56 (0x00007f008e2ab000)

libicuuc.so.56 => /home/no/Qt5.7.0/5.7/gcc_64/plugins/sqldrivers/./../../lib/libicuuc.so.56 (0x00007f008def3000)

libicudata.so.56 => /home/no/Qt5.7.0/5.7/gcc_64/plugins/sqldrivers/./../../lib/libicudata.so.56 (0x00007f008c510000)

libgthread-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgthread-2.0.so.0 (0x00007f008c30e000)

librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f008c106000)

libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007f008bdf5000)

/lib64/ld-linux-x86-64.so.2 (0x00007f00915a0000)

libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007f008bb85000)

一般会有三个文件not found （即上边加粗的）后两个可以使用终端直接安装（具体方法百度），第一个需要手动下载并移动到/usr/lib/x86_64-linux-gnu/下（这里使用终端移动时加上sudo），所有文件安装完毕就可以，重启qt运行程序就可以正常打开链接上mysql，若还是not loaded错误，就需要重新编译libqsqlmysql.so（这种情况就异常麻烦，我使用这种方法各种出错）

libmysqlclient_r.so.16 下载地址https://download.csdn.net/download/jingtaoqian8521/10695078

 

参考方法如下：

1、安装libmysqlclient-dev

sudo apt-get install libmysqlclient-dev
sudo apt-get install libqt5sql5-mysql

2、进入qt安装目录，/home/zmw/Qt5.6.0/5.6/gcc_64/plugins/sqldrivers

            ldd libqsqlmysql.so

发现问题

libmysqlclient_r.so.16 => not found

libssl.so.10 => not found

libcrypto.so.10 => not found

3、解决问题libmysqlclient_r.so.16 => not found

下载 libmysqlclient.so.16，地址： http://files.directadmin.com/services/debian_5.0_64/libmysqlclient.so.16

下载后将该文件拷贝至/usr/lib/x86_64-linux-gnu，并重命名为libmysqlclient_r.so.16  

sudo cp /home/zmw/libmysqlclient.so.16 /usr/lib/x86_64-linux-gnu

cd /usr/lib/x86_64-linux-gnu

sudo mv libmysqlclient.so.16 libmysqlclient_r.so.16

4、解决问题libssl.so.10 => not found和libcrypto.so.10 => not found

sudo apt-get install libssl1.0.0 libssl-dev

cd /lib/x86_64-linux-gnu

sudo ln -s libssl.so.1.0.0 libssl.so.10 //建立软连接

sudo ln -s libcrypto.so.1.0.0 libcrypto.so.10 //建立软连接

5、再次ldd libqsqlmysql.so，问题不复存在。