使用 MYSQL 服务器 (mingw32-make) 为 QT 构建驱动程序时出错

Question

Today, I want to ask you a question about building drivers. I have my little QT Database like this:

mainDB = QSqlDatabase::addDatabase("QMYSQL");
mainDB.setHostName("127.0.0.1");
mainDB.setPort(3306);
mainDB.setDatabaseName("Database_Name");
mainDB.setUserName("root"); //create editors account later
mainDB.setPassword("Password"); //so on :)
if(mainDB.open())
    qDebug() << "mainDB is open";
else
    qDebug() << "mainDB error";

However, then I tried to compile this, I received an error:

QSqlDatabase: QMYSQL driver not loaded             
QSqlDatabase: available drivers: QSQLITE QMYSQL QMYSQL3 QPSQL QPSQL7

I googled this thing a little bit, and realised, what I haven't build a driver for QT, using MySQL. So, I typed this at my cmd:

C:\Qt\5.6\Src\qtbase\src\plugins\sqldrivers\mysql>qmake "INCLUDEPATH += C:\Program Files\MySQL\MySQL Server 5.7\include" "LIBS+=C:\Program Files\MySQL\MySQL Server 5.7\lib\libmysql.lib" mysql.pro

(in includepath I used path to all includes in MySQL server (like, a hundred of h. files), and in LIBS I used path to my libmysql file). It compiled good, and I typed

mingw32-make

to finish my build. However it catches an error:

    In file included from main.cpp:36:0:
    ../../../sql/drivers/mysql/qsql_mysql_p.h:55:19: fatal error: mysql.h: No
   such file or directory
 #include <mysql.h>
                   ^
compilation terminated.
Makefile.Release:466: recipe for target '.obj/release/main.o' failed
mingw32-make[1]: *** [.obj/release/main.o] Error 1
mingw32-make[1]: Leaving directory 'C:/Qt/5.6/Src/qtbase/src/plugins/sqldrivers/
mysql'
makefile:38: recipe for target 'release-all' failed
mingw32-make: *** [release-all] Error 2

and, as a result, my C:\\Qt\\5.6\\Src\\qtbase\\plugins\\sqldrivers is empty.

So, I want to know, how to fix it?

And, yeah, I did include C:\\Qt\\5.6\\mingw49_32\\bin;C:\\Qt\\Tools\\mingw492_32\\bin; dirs in system as a "PATH" variable.

Thank you in advance!

Answer 1

当您在 Windows 上运行时，您必须安装MySQL C 客户端（这是mysql.h文件的来源）。