Error QMYSQL Plugin on Windows

[Stelian]

@jsulm I've run the full path to mingw32-make c:\Qt\Qt5.12.1\Sources\qtbase\src\plugins\sqldrivers>c:\Qt\Qt5.12.1\Tools\mingw730_64\bin\mingw32-make

cd sqlite\ && ( if not exist Makefile C:\Qt\Qt5.12.1\5.12.1\mingw73_64\bin\qmake.exe -o Makefile C:\Qt\Qt5.12.1\Sources\qtbase\src\plugins\sqldrivers\sqlite\sqlite.pro ) && c:/Qt/Qt5.12.1/Tools/mingw730_64/bin/mingw32-make -f Makefile
mingw32-make[1]: Entering directory 'c:/Qt/Qt5.12.1/Sources/qtbase/src/plugins/sqldrivers/sqlite'
c:/Qt/Qt5.12.1/Tools/mingw730_64/bin/mingw32-make -f Makefile.Release all
mingw32-make[2]: Entering directory 'c:/Qt/Qt5.12.1/Sources/qtbase/src/plugins/sqldrivers/sqlite'
g++ -c -fno-keep-inline-dllexport -O2 -std=c++1z -fno-exceptions -Wall -W -Wextra -Wvla -Wdate-time -Wshift-overflow=2 -Wduplicated-cond -Wno-stringop-overflow -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DWINVER=0x0601 -D_WIN32_WINNT=0x0601 -DNDEBUG -DSQLITE_ENABLE_COLUMN_METADATA -DSQLITE_OMIT_LOAD_EXTENSION -DSQLITE_OMIT_COMPLETE -DSQLITE_ENABLE_FTS3 -DSQLITE_ENABLE_FTS3_PARENTHESIS -DSQLITE_ENABLE_FTS5 -DSQLITE_ENABLE_RTREE -DQT_DEPRECATED_WARNINGS -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_ASCII -DQT_NO_EXCEPTIONS -DQT_NO_DEBUG -DQT_PLUGIN -DQT_SQL_LIB -DQT_CORE_LIB -I. -IC:\Qt\Qt5.12.1\Sources\qtbase\src\3rdparty\sqlite -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtSql\5.12.1 -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtSql\5.12.1\QtSql -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtCore\5.12.1 -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtCore\5.12.1\QtCore -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtSql -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtCore -I.moc\release -IC:\openssl\include -IC:\Utils\my_sql\mysql-5.6.11-winx64\include -IC:\Utils\postgresql\pgsql\include -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\mkspecs\win32-g++  -o .obj\release\qsql_sqlite.o qsql_sqlite.cpp
g++: error: CreateProcess: No such file or directory
mingw32-make[2]: *** [Makefile.Release:377: .obj/release/qsql_sqlite.o] Error 1
mingw32-make[2]: Leaving directory 'c:/Qt/Qt5.12.1/Sources/qtbase/src/plugins/sqldrivers/sqlite'
mingw32-make[1]: *** [Makefile:42: release-all] Error 2
mingw32-make[1]: Leaving directory 'c:/Qt/Qt5.12.1/Sources/qtbase/src/plugins/sqldrivers/sqlite'
mingw32-make: *** [Makefile:43: sub-sqlite-make_first] Error 2

[Stelian]

Meanwhile, I added c:\Qt\Qt5.12.1\Tools\mingw730_64\bin\mingw32-make in PATH environment variable in the System Properties and restart the computer and I've run again

c:\Qt\Qt5.12.1\Sources\qtbase\src\plugins\sqldrivers>C:\Qt\Qt5.12.1\5.12.1\mingw73_64\bin\qmake -- MYSQL_INCDIR="C:/Program Files/MySQL/MySQL Server 8.0/include" MYSQL_LIBDIR="C:Program Files/MYSQL/MySQL Server 8.0/lib"

c:\Qt\Qt5.12.1\Sources\qtbase\src\plugins\sqldrivers>c:\Qt\Qt5.12.1\Tools\mingw730_64\bin\mingw32-make

and I get ...

cd sqlite\ && ( if not exist Makefile C:\Qt\Qt5.12.1\5.12.1\mingw73_64\bin\qmake.exe -o Makefile C:\Qt\Qt5.12.1\Sources\qtbase\src\plugins\sqldrivers\sqlite\sqlite.pro ) && c:/Qt/Qt5.12.1/Tools/mingw730_64/bin/mingw32-make -f Makefile
mingw32-make[1]: Entering directory 'c:/Qt/Qt5.12.1/Sources/qtbase/src/plugins/sqldrivers/sqlite'
c:/Qt/Qt5.12.1/Tools/mingw730_64/bin/mingw32-make -f Makefile.Release all
mingw32-make[2]: Entering directory 'c:/Qt/Qt5.12.1/Sources/qtbase/src/plugins/sqldrivers/sqlite'
g++ -c -fno-keep-inline-dllexport -O2 -std=c++1z -fno-exceptions -Wall -W -Wextra -Wvla -Wdate-time -Wshift-overflow=2 -Wduplicated-cond -Wno-stringop-overflow -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DWINVER=0x0601 -D_WIN32_WINNT=0x0601 -DNDEBUG -DSQLITE_ENABLE_COLUMN_METADATA -DSQLITE_OMIT_LOAD_EXTENSION -DSQLITE_OMIT_COMPLETE -DSQLITE_ENABLE_FTS3 -DSQLITE_ENABLE_FTS3_PARENTHESIS -DSQLITE_ENABLE_FTS5 -DSQLITE_ENABLE_RTREE -DQT_DEPRECATED_WARNINGS -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_ASCII -DQT_NO_EXCEPTIONS -DQT_NO_DEBUG -DQT_PLUGIN -DQT_SQL_LIB -DQT_CORE_LIB -I. -IC:\Qt\Qt5.12.1\Sources\qtbase\src\3rdparty\sqlite -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtSql\5.12.1 -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtSql\5.12.1\QtSql -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtCore\5.12.1 -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtCore\5.12.1\QtCore -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtSql -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtCore -I.moc\release -IC:\openssl\include -IC:\Utils\my_sql\mysql-5.6.11-winx64\include -IC:\Utils\postgresql\pgsql\include -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\mkspecs\win32-g++  -o .obj\release\qsql_sqlite.o qsql_sqlite.cpp
g++ -fno-keep-inline-dllexport -O2 -std=c++1z -fno-exceptions -Wall -W -Wextra -Wvla -Wdate-time -Wshift-overflow=2 -Wduplicated-cond -Wno-stringop-overflow -dM -E -o .moc\release\moc_predefs.h C:\Qt\Qt5.12.1\5.12.1\mingw73_64\mkspecs\features\data\dummy.cpp
C:\Qt\Qt5.12.1\5.12.1\mingw73_64\bin\moc.exe -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DWINVER=0x0601 -D_WIN32_WINNT=0x0601 -DNDEBUG -DSQLITE_ENABLE_COLUMN_METADATA -DSQLITE_OMIT_LOAD_EXTENSION -DSQLITE_OMIT_COMPLETE -DSQLITE_ENABLE_FTS3 -DSQLITE_ENABLE_FTS3_PARENTHESIS -DSQLITE_ENABLE_FTS5 -DSQLITE_ENABLE_RTREE -DQT_DEPRECATED_WARNINGS -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_ASCII -DQT_NO_EXCEPTIONS -DQT_NO_DEBUG -DQT_PLUGIN -DQT_SQL_LIB -DQT_CORE_LIB --include C:/Qt/Qt5.12.1/Sources/qtbase/src/plugins/sqldrivers/sqlite/.moc/release/moc_predefs.h -IC:/Qt/Qt5.12.1/5.12.1/mingw73_64/mkspecs/win32-g++ -IC:/Qt/Qt5.12.1/Sources/qtbase/src/plugins/sqldrivers/sqlite -IC:/Qt/Qt5.12.1/Sources/qtbase/src/3rdparty/sqlite -IC:/Qt/Qt5.12.1/5.12.1/mingw73_64/include/QtSql/5.12.1 -IC:/Qt/Qt5.12.1/5.12.1/mingw73_64/include/QtSql/5.12.1/QtSql -IC:/Qt/Qt5.12.1/5.12.1/mingw73_64/include/QtCore/5.12.1 -IC:/Qt/Qt5.12.1/5.12.1/mingw73_64/include/QtCore/5.12.1/QtCore -IC:/Qt/Qt5.12.1/5.12.1/mingw73_64/include -IC:/Qt/Qt5.12.1/5.12.1/mingw73_64/include/QtSql -IC:/Qt/Qt5.12.1/5.12.1/mingw73_64/include/QtCore -IC:/Qt/Qt5.12.1/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++ -IC:/Qt/Qt5.12.1/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/x86_64-w64-mingw32 -IC:/Qt/Qt5.12.1/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/backward -IC:/Qt/Qt5.12.1/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include -IC:/Qt/Qt5.12.1/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include-fixed -IC:/Qt/Qt5.12.1/Tools/mingw730_64/x86_64-w64-mingw32/include smain.cpp -o .moc\release\smain.moc
g++ -c -fno-keep-inline-dllexport -O2 -std=c++1z -fno-exceptions -Wall -W -Wextra -Wvla -Wdate-time -Wshift-overflow=2 -Wduplicated-cond -Wno-stringop-overflow -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DWINVER=0x0601 -D_WIN32_WINNT=0x0601 -DNDEBUG -DSQLITE_ENABLE_COLUMN_METADATA -DSQLITE_OMIT_LOAD_EXTENSION -DSQLITE_OMIT_COMPLETE -DSQLITE_ENABLE_FTS3 -DSQLITE_ENABLE_FTS3_PARENTHESIS -DSQLITE_ENABLE_FTS5 -DSQLITE_ENABLE_RTREE -DQT_DEPRECATED_WARNINGS -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_ASCII -DQT_NO_EXCEPTIONS -DQT_NO_DEBUG -DQT_PLUGIN -DQT_SQL_LIB -DQT_CORE_LIB -I. -IC:\Qt\Qt5.12.1\Sources\qtbase\src\3rdparty\sqlite -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtSql\5.12.1 -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtSql\5.12.1\QtSql -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtCore\5.12.1 -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtCore\5.12.1\QtCore -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtSql -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtCore -I.moc\release -IC:\openssl\include -IC:\Utils\my_sql\mysql-5.6.11-winx64\include -IC:\Utils\postgresql\pgsql\include -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\mkspecs\win32-g++  -o .obj\release\smain.o smain.cpp
gcc -c -fno-keep-inline-dllexport -O2 -std=gnu11 -fno-exceptions -Wall -W -Wextra -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DWINVER=0x0601 -D_WIN32_WINNT=0x0601 -DNDEBUG -DSQLITE_ENABLE_COLUMN_METADATA -DSQLITE_OMIT_LOAD_EXTENSION -DSQLITE_OMIT_COMPLETE -DSQLITE_ENABLE_FTS3 -DSQLITE_ENABLE_FTS3_PARENTHESIS -DSQLITE_ENABLE_FTS5 -DSQLITE_ENABLE_RTREE -DQT_DEPRECATED_WARNINGS -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_ASCII -DQT_NO_EXCEPTIONS -DQT_NO_DEBUG -DQT_PLUGIN -DQT_SQL_LIB -DQT_CORE_LIB -I. -IC:\Qt\Qt5.12.1\Sources\qtbase\src\3rdparty\sqlite -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtSql\5.12.1 -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtSql\5.12.1\QtSql -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtCore\5.12.1 -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtCore\5.12.1\QtCore -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtSql -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtCore -I.moc\release -IC:\openssl\include -IC:\Utils\my_sql\mysql-5.6.11-winx64\include -IC:\Utils\postgresql\pgsql\include -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\mkspecs\win32-g++  -o .obj\release\sqlite3.o C:\Qt\Qt5.12.1\Sources\qtbase\src\3rdparty\sqlite\sqlite3.c
C:\Qt\Qt5.12.1\Sources\qtbase\src\3rdparty\sqlite\sqlite3.c: In function 'sqlite3ThreadJoin':
C:\Qt\Qt5.12.1\Sources\qtbase\src\3rdparty\sqlite\sqlite3.c:29362:8: warning: variable 'bRc' set but not used [-Wunused-but-set-variable]
   BOOL bRc;
        ^~~
C:\Qt\Qt5.12.1\Sources\qtbase\src\3rdparty\sqlite\sqlite3.c: In function 'winUnfetch':
C:\Qt\Qt5.12.1\Sources\qtbase\src\3rdparty\sqlite\sqlite3.c:44948:45: warning: unused parameter 'iOff' [-Wunused-parameter]
 static int winUnfetch(sqlite3_file *fd, i64 iOff, void *p){
                                             ^~~~
C:\Qt\Qt5.12.1\Sources\qtbase\src\3rdparty\sqlite\sqlite3.c: In function 'sqlite3_db_status':
C:\Qt\Qt5.12.1\Sources\qtbase\src\3rdparty\sqlite\sqlite3.c:20744:10: warning: this statement may fall through [-Wimplicit-fallthrough=]
       op = SQLITE_DBSTATUS_CACHE_WRITE+1;
       ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
C:\Qt\Qt5.12.1\Sources\qtbase\src\3rdparty\sqlite\sqlite3.c:20746:5: note: here
     case SQLITE_DBSTATUS_CACHE_HIT:
     ^~~~
C:\Qt\Qt5.12.1\Sources\qtbase\src\3rdparty\sqlite\sqlite3.c: In function 'sqlite3_str_vappendf':
C:\Qt\Qt5.12.1\Sources\qtbase\src\3rdparty\sqlite\sqlite3.c:27452:19: warning: this statement may fall through [-Wimplicit-fallthrough=]
         flag_long = sizeof(char*)==sizeof(i64) ? 2 :
         ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                      sizeof(char*)==sizeof(long int) ? 1 : 0;
...
...
...
C:\Qt\Qt5.12.1\5.12.1\mingw73_64\bin\moc.exe -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DWINVER=0x0601 -D_WIN32_WINNT=0x0601 -DSQLITE_ENABLE_COLUMN_METADATA -DSQLITE_OMIT_LOAD_EXTENSION -DSQLITE_OMIT_COMPLETE -DSQLITE_ENABLE_FTS3 -DSQLITE_ENABLE_FTS3_PARENTHESIS -DSQLITE_ENABLE_FTS5 -DSQLITE_ENABLE_RTREE -DQT_DEPRECATED_WARNINGS -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_ASCII -DQT_NO_EXCEPTIONS -DQT_PLUGIN -DQT_SQL_LIB -DQT_CORE_LIB --include C:/Qt/Qt5.12.1/Sources/qtbase/src/plugins/sqldrivers/sqlite/.moc/debug/moc_predefs.h -IC:/Qt/Qt5.12.1/5.12.1/mingw73_64/mkspecs/win32-g++ -IC:/Qt/Qt5.12.1/Sources/qtbase/src/plugins/sqldrivers/sqlite -IC:/Qt/Qt5.12.1/Sources/qtbase/src/3rdparty/sqlite -IC:/Qt/Qt5.12.1/5.12.1/mingw73_64/include/QtSql/5.12.1 -IC:/Qt/Qt5.12.1/5.12.1/mingw73_64/include/QtSql/5.12.1/QtSql -IC:/Qt/Qt5.12.1/5.12.1/mingw73_64/include/QtCore/5.12.1 -IC:/Qt/Qt5.12.1/5.12.1/mingw73_64/include/QtCore/5.12.1/QtCore -IC:/Qt/Qt5.12.1/5.12.1/mingw73_64/include -IC:/Qt/Qt5.12.1/5.12.1/mingw73_64/include/QtSql -IC:/Qt/Qt5.12.1/5.12.1/mingw73_64/include/QtCore -IC:/Qt/Qt5.12.1/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++ -IC:/Qt/Qt5.12.1/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/x86_64-w64-mingw32 -IC:/Qt/Qt5.12.1/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/backward -IC:/Qt/Qt5.12.1/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include -IC:/Qt/Qt5.12.1/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include-fixed -IC:/Qt/Qt5.12.1/Tools/mingw730_64/x86_64-w64-mingw32/include qsql_sqlite_p.h -o .moc\debug\moc_qsql_sqlite_p.cpp
g++ -c -fno-keep-inline-dllexport -g -Og -std=c++1z -fno-exceptions -Wall -W -Wextra -Wvla -Wdate-time -Wshift-overflow=2 -Wduplicated-cond -Wno-stringop-overflow -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DWINVER=0x0601 -D_WIN32_WINNT=0x0601 -DSQLITE_ENABLE_COLUMN_METADATA -DSQLITE_OMIT_LOAD_EXTENSION -DSQLITE_OMIT_COMPLETE -DSQLITE_ENABLE_FTS3 -DSQLITE_ENABLE_FTS3_PARENTHESIS -DSQLITE_ENABLE_FTS5 -DSQLITE_ENABLE_RTREE -DQT_DEPRECATED_WARNINGS -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_ASCII -DQT_NO_EXCEPTIONS -DQT_PLUGIN -DQT_SQL_LIB -DQT_CORE_LIB -I. -IC:\Qt\Qt5.12.1\Sources\qtbase\src\3rdparty\sqlite -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtSql\5.12.1 -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtSql\5.12.1\QtSql -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtCore\5.12.1 -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtCore\5.12.1\QtCore -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtSql -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\include\QtCore -I.moc\debug -IC:\openssl\include -IC:\Utils\my_sql\mysql-5.6.11-winx64\include -IC:\Utils\postgresql\pgsql\include -IC:\Qt\Qt5.12.1\5.12.1\mingw73_64\mkspecs\win32-g++  -o .obj\debug\moc_qsql_sqlite_p.o .moc\debug\moc_qsql_sqlite_p.cpp
windres -i qsqlited_resource.rc -o .obj\debug\qsqlited_resource_res.o --include-dir=. -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DWINVER=0x0601 -D_WIN32_WINNT=0x0601 -DSQLITE_ENABLE_COLUMN_METADATA -DSQLITE_OMIT_LOAD_EXTENSION -DSQLITE_OMIT_COMPLETE -DSQLITE_ENABLE_FTS3 -DSQLITE_ENABLE_FTS3_PARENTHESIS -DSQLITE_ENABLE_FTS5 -DSQLITE_ENABLE_RTREE -DQT_DEPRECATED_WARNINGS -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_ASCII -DQT_NO_EXCEPTIONS -DQT_PLUGIN -DQT_SQL_LIB -DQT_CORE_LIB
g++ -shared -Wl,-subsystem,windows -Wl,--out-implib,C:\Qt\Qt5.12.1\Sources\qtbase\src\plugins\sqldrivers\plugins\sqldrivers\libqsqlited.a -o ..\plugins\sqldrivers\qsqlited.dll .obj/debug/qsql_sqlite.o .obj/debug/smain.o .obj/debug/sqlite3.o .obj/debug/moc_qsql_sqlite_p.o  -LC:\openssl\lib -LC:\Utils\my_sql\mysql-5.6.11-winx64\lib -LC:\Utils\postgresql\pgsql\lib -LC:\Qt\Qt5.12.1\5.12.1\mingw73_64\lib C:\Qt\Qt5.12.1\5.12.1\mingw73_64\lib\libQt5Sqld.a C:\Qt\Qt5.12.1\5.12.1\mingw73_64\lib\libQt5Cored.a .obj\debug\qsqlited_resource_res.o
mingw32-make[2]: Leaving directory 'c:/Qt/Qt5.12.1/Sources/qtbase/src/plugins/sqldrivers/sqlite'
mingw32-make[1]: Leaving directory 'c:/Qt/Qt5.12.1/Sources/qtbase/src/plugins/sqldrivers/sqlite'

[Stelian]

When I've run a simple program

#include <QCoreApplication>
#include <QtSql>
#include <QSqlDatabase>
#include <QtDebug>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    QSqlDatabase db = QSqlDatabase::addDatabase("QMYSQL");
    db.setHostName("localhost");
    db.setUserName("root");
    db.setPassword("DSa81&l12&z26");
    db.setDatabaseName("Employee_management");

    if (db.open())
    {
        qDebug() << "Database connected successfuly!";
    }
    else
    {
        qDebug() << "Database is not connected!";
    }

    return a.exec();
}

I receive the message "Database is not connected!", which means there are still some blurring about the QMYSQL driver.

[SGaist]

Did you call mingw32-make install after the build succeeded ?

[Stelian]

Yes, and I received the next message

cd odbc\ && ( if not exist Makefile C:\Qt\Qt5.12.1\5.12.1\mingw73_64\bin\qmake.exe -o Makefile C:\Qt\Qt5.12.1\Sources\qtbase\src\plugins\sqldrivers\odbc\odbc.pro ) && mingw32-make -f Makefile install
mingw32-make[1]: Entering directory 'c:/Qt/Qt5.12.1/Sources/qtbase/src/plugins/sqldrivers/odbc'
mingw32-make -f Makefile.Release install
mingw32-make[2]: Entering directory 'c:/Qt/Qt5.12.1/Sources/qtbase/src/plugins/sqldrivers/odbc'
copy /y ..\plugins\sqldrivers\qsqlodbc.dll C:\Qt\Qt5.12.1\5.12.1\mingw73_64\plugins\sqldrivers\qsqlodbc.dll
        1 file(s) copied.
C:\Qt\Qt5.12.1\5.12.1\mingw73_64\bin\qmake.exe -install qinstall C:\Qt\Qt5.12.1\Sources\qtbase\src\plugins\sqldrivers\lib\cmake\Qt5Sql\Qt5Sql_QODBCDriverPlugin.cmake C:\Qt\Qt5.12.1\5.12.1\mingw73_64\lib\cmake\Qt5Sql\Qt5Sql_QODBCDriverPlugin.cmake
mingw32-make[2]: Leaving directory 'c:/Qt/Qt5.12.1/Sources/qtbase/src/plugins/sqldrivers/odbc'
mingw32-make -f Makefile.Debug install
mingw32-make[2]: Entering directory 'c:/Qt/Qt5.12.1/Sources/qtbase/src/plugins/sqldrivers/odbc'
copy /y ..\plugins\sqldrivers\qsqlodbcd.dll C:\Qt\Qt5.12.1\5.12.1\mingw73_64\plugins\sqldrivers\qsqlodbcd.dll
        1 file(s) copied.
C:\Qt\Qt5.12.1\5.12.1\mingw73_64\bin\qmake.exe -install qinstall C:\Qt\Qt5.12.1\Sources\qtbase\src\plugins\sqldrivers\lib\cmake\Qt5Sql\Qt5Sql_QODBCDriverPlugin.cmake C:\Qt\Qt5.12.1\5.12.1\mingw73_64\lib\cmake\Qt5Sql\Qt5Sql_QODBCDriverPlugin.cmake
mingw32-make[2]: Leaving directory 'c:/Qt/Qt5.12.1/Sources/qtbase/src/plugins/sqldrivers/odbc'
mingw32-make[1]: Leaving directory 'c:/Qt/Qt5.12.1/Sources/qtbase/src/plugins/sqldrivers/odbc'
cd sqlite\ && ( if not exist Makefile C:\Qt\Qt5.12.1\5.12.1\mingw73_64\bin\qmake.exe -o Makefile C:\Qt\Qt5.12.1\Sources\qtbase\src\plugins\sqldrivers\sqlite\sqlite.pro ) && mingw32-make -f Makefile install
mingw32-make[1]: Entering directory 'c:/Qt/Qt5.12.1/Sources/qtbase/src/plugins/sqldrivers/sqlite'
mingw32-make -f Makefile.Release install
mingw32-make[2]: Entering directory 'c:/Qt/Qt5.12.1/Sources/qtbase/src/plugins/sqldrivers/sqlite'
copy /y ..\plugins\sqldrivers\qsqlite.dll C:\Qt\Qt5.12.1\5.12.1\mingw73_64\plugins\sqldrivers\qsqlite.dll
        1 file(s) copied.
C:\Qt\Qt5.12.1\5.12.1\mingw73_64\bin\qmake.exe -install qinstall C:\Qt\Qt5.12.1\Sources\qtbase\src\plugins\sqldrivers\lib\cmake\Qt5Sql\Qt5Sql_QSQLiteDriverPlugin.cmake C:\Qt\Qt5.12.1\5.12.1\mingw73_64\lib\cmake\Qt5Sql\Qt5Sql_QSQLiteDriverPlugin.cmake
mingw32-make[2]: Leaving directory 'c:/Qt/Qt5.12.1/Sources/qtbase/src/plugins/sqldrivers/sqlite'
mingw32-make -f Makefile.Debug install
mingw32-make[2]: Entering directory 'c:/Qt/Qt5.12.1/Sources/qtbase/src/plugins/sqldrivers/sqlite'
copy /y ..\plugins\sqldrivers\qsqlited.dll C:\Qt\Qt5.12.1\5.12.1\mingw73_64\plugins\sqldrivers\qsqlited.dll
        1 file(s) copied.
C:\Qt\Qt5.12.1\5.12.1\mingw73_64\bin\qmake.exe -install qinstall C:\Qt\Qt5.12.1\Sources\qtbase\src\plugins\sqldrivers\lib\cmake\Qt5Sql\Qt5Sql_QSQLiteDriverPlugin.cmake C:\Qt\Qt5.12.1\5.12.1\mingw73_64\lib\cmake\Qt5Sql\Qt5Sql_QSQLiteDriverPlugin.cmake
mingw32-make[2]: Leaving directory 'c:/Qt/Qt5.12.1/Sources/qtbase/src/plugins/sqldrivers/sqlite'
mingw32-make[1]: Leaving directory 'c:/Qt/Qt5.12.1/Sources/qtbase/src/plugins/sqldrivers/sqlite'

Part of this message is in my previous post

[Stelian]

When I run the code

QSqlDatabase: QMYSQL driver not loaded
QSqlDatabase: available drivers: QSQLITE QMYSQL QMYSQL3 QODBC QODBC3 QPSQL QPSQL7
Database is Not Connected!

[SGaist]

In Qt Creator's Run part of the Project panel, did you add the path to the MySQL dlls in the PATH environment variable ?

[Stelian]

@SGaist Let me understand.
First of all, do you mean I have to add that path "C:\Program Files (x86)\MySQL\MySQL Connector C 6.1\lib" or this path "C:\Program Files\MySQL\MySQL Server 8.0\lib"
Second of all, where do I have to add ? (see picture1 and picture2) ?

[jsulm]

@Stelian As @SGaist wrote: in QtCreator Run settings.
I think you need the MySQL connector libs (but you can simply put both).

[Stelian]

@jsulm Where do I have to add in the first picture or second ?

[jsulm]

@Stelian In the second of course as it is showing exactly what was suggested: Run settings in QtCreator.

[Stelian]

@jsulm I,ve added both C:\Program Files (x86)\MySQL\MySQL Connector C 6.1\lib" and this path "C:\Program Files\MySQL\MySQL Server 8.0\lib in Run Settings -> Run Environment -> Path, then restart Qt and run the code, Not connected.

[SGaist]

Then again, start your application with the QT_DEBUG_PLUGINS environment variable to see what is happening.

[Stelian]

@SGaist

QFactoryLoader::QFactoryLoader() checking directory path "C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers" ...
QFactoryLoader::QFactoryLoader() looking at "C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlite.dll"
Found metadata in lib C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlite.dll, metadata=
{
    "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
    "MetaData": {
        "Keys": [
            "QSQLITE"
        ]
    },
    "archreq": 0,
    "className": "QSQLiteDriverPlugin",
    "debug": false,
    "version": 330752
}


"The plugin 'C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlite.dll' uses incompatible Qt library. (Cannot mix debug and release libraries.)"
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlited.dll"
Found metadata in lib C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlited.dll, metadata=
{
    "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
    "MetaData": {
        "Keys": [
            "QSQLITE"
        ]
    },
    "archreq": 1,
    "className": "QSQLiteDriverPlugin",
    "debug": true,
    "version": 330752
}


Got keys from plugin meta data ("QSQLITE")
QFactoryLoader::QFactoryLoader() looking at "C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlmysql.dll"
Found metadata in lib C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlmysql.dll, metadata=
{
    "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
    "MetaData": {
        "Keys": [
            "QMYSQL3",
            "QMYSQL"
        ]
    },
    "archreq": 0,
    "className": "QMYSQLDriverPlugin",
    "debug": false,
    "version": 330752
}


"The plugin 'C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlmysql.dll' uses incompatible Qt library. (Cannot mix debug and release libraries.)"
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlmysqld.dll"
Found metadata in lib C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlmysqld.dll, metadata=
{
    "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
    "MetaData": {
        "Keys": [
            "QMYSQL3",
            "QMYSQL"
        ]
    },
    "archreq": 1,
    "className": "QMYSQLDriverPlugin",
    "debug": true,
    "version": 330752
}


Got keys from plugin meta data ("QMYSQL3", "QMYSQL")
QFactoryLoader::QFactoryLoader() looking at "C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlodbc.dll"
Found metadata in lib C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlodbc.dll, metadata=
{
    "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
    "MetaData": {
        "Keys": [
            "QODBC3",
            "QODBC"
        ]
    },
    "archreq": 0,
    "className": "QODBCDriverPlugin",
    "debug": false,
    "version": 330752
}


"The plugin 'C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlodbc.dll' uses incompatible Qt library. (Cannot mix debug and release libraries.)"
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlodbcd.dll"
Found metadata in lib C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlodbcd.dll, metadata=
{
    "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
    "MetaData": {
        "Keys": [
            "QODBC3",
            "QODBC"
        ]
    },
    "archreq": 1,
    "className": "QODBCDriverPlugin",
    "debug": true,
    "version": 330752
}


Got keys from plugin meta data ("QODBC3", "QODBC")
QFactoryLoader::QFactoryLoader() looking at "C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlpsql.dll"
Found metadata in lib C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlpsql.dll, metadata=
{
    "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
    "MetaData": {
        "Keys": [
            "QPSQL7",
            "QPSQL"
        ]
    },
    "archreq": 0,
    "className": "QPSQLDriverPlugin",
    "debug": false,
    "version": 330752
}


"The plugin 'C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlpsql.dll' uses incompatible Qt library. (Cannot mix debug and release libraries.)"
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlpsqld.dll"
Found metadata in lib C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlpsqld.dll, metadata=
{
    "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
    "MetaData": {
        "Keys": [
            "QPSQL7",
            "QPSQL"
        ]
    },
    "archreq": 1,
    "className": "QPSQLDriverPlugin",
    "debug": true,
    "version": 330752
}


Got keys from plugin meta data ("QPSQL7", "QPSQL")
QFactoryLoader::QFactoryLoader() checking directory path "E:/Qt Creator/build-sql_console_test-Desktop_Qt_5_12_1_MinGW_64_bit-Debug/debug/sqldrivers" ...
Cannot load library C:\Qt\Qt5.12.1\5.12.1\mingw73_64\plugins\sqldrivers\qsqlmysqld.dll: The specified module could not be found.
QLibraryPrivate::loadPlugin failed on "C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlmysqld.dll" : "Cannot load library C:\\Qt\\Qt5.12.1\\5.12.1\\mingw73_64\\plugins\\sqldrivers\\qsqlmysqld.dll: The specified module could not be found."
QSqlDatabase: QMYSQL driver not loaded
QSqlDatabase: available drivers: QSQLITE QMYSQL QMYSQL3 QODBC QODBC3 QPSQL QPSQL7
Database is Not Connected!

[SGaist]

Looks like you only built the plugin for release and not for debug and you are running a debug build of your application.

[Stelian]

@SGaist I do not know if I built the plugin for release and not for debug, but if you say that I did, ok, you are the champion.
Tell me what I have to do next.

[Stelian]

@SGaist Believe me, I don't know how to build a plugin in release mode or in debug mode, to my shame.
If I did that, I did it unconsciously.

[SGaist]

Add -debug to the qmake call

[Stelian]

@SGaist I've called the qmake in debug mode, run the code and again Database is Not Connected!
Then again, I have start the application with the QT_DEBUG_PLUGINS environment variable and I get the next message

QFactoryLoader::QFactoryLoader() checking directory path "C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers" ...
QFactoryLoader::QFactoryLoader() looking at "C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlite.dll"
Found metadata in lib C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlite.dll, metadata=
{
    "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
    "MetaData": {
        "Keys": [
            "QSQLITE"
        ]
    },
    "archreq": 0,
    "className": "QSQLiteDriverPlugin",
    "debug": false,
    "version": 330752
}


"The plugin 'C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlite.dll' uses incompatible Qt library. (Cannot mix debug and release libraries.)"
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlited.dll"
Found metadata in lib C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlited.dll, metadata=
{
    "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
    "MetaData": {
        "Keys": [
            "QSQLITE"
        ]
    },
    "archreq": 1,
    "className": "QSQLiteDriverPlugin",
    "debug": true,
    "version": 330752
}


Got keys from plugin meta data ("QSQLITE")
QFactoryLoader::QFactoryLoader() looking at "C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlmysql.dll"
Found metadata in lib C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlmysql.dll, metadata=
{
    "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
    "MetaData": {
        "Keys": [
            "QMYSQL3",
            "QMYSQL"
        ]
    },
    "archreq": 0,
    "className": "QMYSQLDriverPlugin",
    "debug": false,
    "version": 330752
}


"The plugin 'C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlmysql.dll' uses incompatible Qt library. (Cannot mix debug and release libraries.)"
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlmysqld.dll"
Found metadata in lib C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlmysqld.dll, metadata=
{
    "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
    "MetaData": {
        "Keys": [
            "QMYSQL3",
            "QMYSQL"
        ]
    },
    "archreq": 1,
    "className": "QMYSQLDriverPlugin",
    "debug": true,
    "version": 330752
}


Got keys from plugin meta data ("QMYSQL3", "QMYSQL")
QFactoryLoader::QFactoryLoader() looking at "C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlodbc.dll"
Found metadata in lib C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlodbc.dll, metadata=
{
    "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
    "MetaData": {
        "Keys": [
            "QODBC3",
            "QODBC"
        ]
    },
    "archreq": 0,
    "className": "QODBCDriverPlugin",
    "debug": false,
    "version": 330752
}


"The plugin 'C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlodbc.dll' uses incompatible Qt library. (Cannot mix debug and release libraries.)"
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlodbcd.dll"
Found metadata in lib C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlodbcd.dll, metadata=
{
    "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
    "MetaData": {
        "Keys": [
            "QODBC3",
            "QODBC"
        ]
    },
    "archreq": 1,
    "className": "QODBCDriverPlugin",
    "debug": true,
    "version": 330752
}


Got keys from plugin meta data ("QODBC3", "QODBC")
QFactoryLoader::QFactoryLoader() looking at "C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlpsql.dll"
Found metadata in lib C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlpsql.dll, metadata=
{
    "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
    "MetaData": {
        "Keys": [
            "QPSQL7",
            "QPSQL"
        ]
    },
    "archreq": 0,
    "className": "QPSQLDriverPlugin",
    "debug": false,
    "version": 330752
}


"The plugin 'C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlpsql.dll' uses incompatible Qt library. (Cannot mix debug and release libraries.)"
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlpsqld.dll"
Found metadata in lib C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlpsqld.dll, metadata=
{
    "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
    "MetaData": {
        "Keys": [
            "QPSQL7",
            "QPSQL"
        ]
    },
    "archreq": 1,
    "className": "QPSQLDriverPlugin",
    "debug": true,
    "version": 330752
}

Got keys from plugin meta data ("QPSQL7", "QPSQL")
QFactoryLoader::QFactoryLoader() checking directory path "E:/Qt Creator/build-sql_console_test-Desktop_Qt_5_12_1_MinGW_64_bit-Debug/debug/sqldrivers" ...
Cannot load library C:\Qt\Qt5.12.1\5.12.1\mingw73_64\plugins\sqldrivers\qsqlmysqld.dll: The specified module could not be found.
QLibraryPrivate::loadPlugin failed on "C:/Qt/Qt5.12.1/5.12.1/mingw73_64/plugins/sqldrivers/qsqlmysqld.dll" : "Cannot load library C:\\Qt\\Qt5.12.1\\5.12.1\\mingw73_64\\plugins\\sqldrivers\\qsqlmysqld.dll: The specified module could not be found."
QSqlDatabase: QMYSQL driver not loaded
QSqlDatabase: available drivers: QSQLITE QMYSQL QMYSQL3 QODBC QODBC3 QPSQL QPSQL7
Database is Not Connected!

[JonB]

@Stelian

Cannot load library C:\Qt\Qt5.12.1\5.12.1\mingw73_64\plugins\sqldrivers\qsqlmysqld.dll: The specified module could not be found.

Does the exact file specified by that path actually exist, or not? (Note that the file mentioned, qsqlmysqld.dll, has a d just before the ., presumably indicating it's a debug build; this is not the same as if it were qsqlmysql.dll.)