QT5.15.0, MySQL database, msvc2015_64 and Windows 10

[Marcus Barnet]

May be I'm on the right road, I run x64 VS2019 Native tools and now it finds the MySQL!

But I get an error when I launch nmake install:

*******************************************************************
** Visual Studio 2019 Developer Command Prompt v16.6.5
** Copyright (c) 2020 Microsoft Corporation
**********************************************************************
[vcvarsall.bat] Environment initialized for: 'x64'

C:\Program Files (x86)\Microsoft Visual Studio\2019\Community>C:\Qt\5.15.0\msvc2019_64\bin\qtenv2.bat
Setting up environment for Qt usage...
Remember to call vcvarsall.bat to complete environment setup!

C:\Qt\5.15.0\msvc2019_64>cd C:\Users\39328\Downloads\qt-everywhere-src-5.15.0 (1)\qt-everywhere-src-5.15.0\qtbase\src\plugins\sqldrivers

C:\Users\39328\Downloads\qt-everywhere-src-5.15.0 (1)\qt-everywhere-src-5.15.0\qtbase\src\plugins\sqldrivers>qmake -- MYSQL_INCDIR="C:/Program Files/MySQL/MySQL Connector C 6.1/include" MYSQL_LIBDIR="C:/Program Files/MySQL/MySQL Connector C 6.1/lib"

Running configuration tests...
Checking for DB2 (IBM)... no
Checking for InterBase... no
Checking for MySQL... yes
Checking for OCI (Oracle)... no
Checking for ODBC... yes
Checking for PostgreSQL... no
Checking for SQLite (version 2)... no
Checking for TDS (Sybase)... no
Done running configuration tests.

Configure summary:

Qt Sql Drivers:
  DB2 (IBM) .............................. no
  InterBase .............................. no
  MySql .................................. yes
  OCI (Oracle) ........................... no
  ODBC ................................... yes
  PostgreSQL ............................. no
  SQLite2 ................................ no
  SQLite ................................. yes
    Using system provided SQLite ......... no
  TDS (Sybase) ........................... no

Qt is now configured for building. Just run 'nmake'.
Once everything is built, you must run 'nmake install'.
Qt will be installed into 'C:\Qt\5.15.0\msvc2019_64'.

Prior to reconfiguration, make sure you remove any leftovers from
the previous build.


C:\Users\39328\Downloads\qt-everywhere-src-5.15.0 (1)\qt-everywhere-src-5.15.0\qtbase\src\plugins\sqldrivers>nmake sub-mysql

Microsoft (R) Program Maintenance Utility Version 14.26.28806.0
Copyright (C) Microsoft Corporation.  All rights reserved.

        cd mysql\ && ( if not exist Makefile C:\Qt\5.15.0\msvc2019_64\bin\qmake.exe -o Makefile "C:\Users\39328\Downloads\qt-everywhere-src-5.15.0 (1)\qt-everywhere-src-5.15.0\qtbase\src\plugins\sqldrivers\mysql\mysql.pro" ) && "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.26.28801\bin\HostX64\x64\nmake.exe" -f Makefile

Microsoft (R) Program Maintenance Utility Version 14.26.28806.0
Copyright (C) Microsoft Corporation.  All rights reserved.

        "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.26.28801\bin\HostX64\x64\nmake.exe" -f Makefile.Release all

Microsoft (R) Program Maintenance Utility Version 14.26.28806.0
Copyright (C) Microsoft Corporation.  All rights reserved.

        cl -BxC:\Qt\5.15.0\msvc2019_64\bin\qmake.exe -nologo -Zc:wchar_t -FS -Zc:rvalueCast -Zc:inline -Zc:strictStrings -Zc:throwingNew -O2 -Zi -MD -utf-8 /wd4530 /wd4577 -W3 -w34100 -w34189 -w44996 -w44456 -w44457 -w44458 -wd4577 -wd4467 -E C:\Qt\5.15.0\msvc2019_64\mkspecs\features\data\dummy.cpp 2>NUL >.moc\release\moc_predefs.h
        C:\Qt\5.15.0\msvc2019_64\bin\moc.exe -DUNICODE -D_UNICODE -DWIN32 -D_ENABLE_EXTENDED_ALIGNED_STORAGE -DWIN64 -DQT_NO_LINKED_LIST -DQT_NO_JAVA_STYLE_ITERATORS -DQT_DEPRECATED_WARNINGS -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_ASCII -DNDEBUG -DQT_NO_EXCEPTIONS -DQT_NO_DEBUG -DQT_PLUGIN -DQT_SQL_LIB -DQT_CORE_LIB -D_WINDLL --compiler-flavor=msvc --include "C:/Users/39328/Downloads/qt-everywhere-src-5.15.0 (1)/qt-everywhere-src-5.15.0/qtbase/src/plugins/sqldrivers/mysql/.moc/release/moc_predefs.h" -IC:/Qt/5.15.0/msvc2019_64/mkspecs/win32-msvc -I"C:/Users/39328/Downloads/qt-everywhere-src-5.15.0 (1)/qt-everywhere-src-5.15.0/qtbase/src/plugins/sqldrivers/mysql" -IC:/Qt/5.15.0/msvc2019_64/include/QtSql/5.15.0 -IC:/Qt/5.15.0/msvc2019_64/include/QtSql/5.15.0/QtSql -IC:/Qt/5.15.0/msvc2019_64/include/QtCore/5.15.0 -IC:/Qt/5.15.0/msvc2019_64/include/QtCore/5.15.0/QtCore -IC:/Qt/5.15.0/msvc2019_64/include -IC:/Qt/5.15.0/msvc2019_64/include/QtSql -IC:/Qt/5.15.0/msvc2019_64/include/QtCore -I"C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\INCLUDE" -I"C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\ATLMFC\INCLUDE" -I"C:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\ucrt" -I"C:\Program Files (x86)\Windows Kits\NETFXSDK\4.6.1\include\um" -I"C:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\shared" -I"C:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\um" -I"C:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\winrt" main.cpp -o .moc\release\main.moc
        C:\Qt\5.15.0\msvc2019_64\bin\moc.exe -DUNICODE -D_UNICODE -DWIN32 -D_ENABLE_EXTENDED_ALIGNED_STORAGE -DWIN64 -DQT_NO_LINKED_LIST -DQT_NO_JAVA_STYLE_ITERATORS -DQT_DEPRECATED_WARNINGS -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_ASCII -DNDEBUG -DQT_NO_EXCEPTIONS -DQT_NO_DEBUG -DQT_PLUGIN -DQT_SQL_LIB -DQT_CORE_LIB -D_WINDLL --compiler-flavor=msvc --include "C:/Users/39328/Downloads/qt-everywhere-src-5.15.0 (1)/qt-everywhere-src-5.15.0/qtbase/src/plugins/sqldrivers/mysql/.moc/release/moc_predefs.h" -IC:/Qt/5.15.0/msvc2019_64/mkspecs/win32-msvc -I"C:/Users/39328/Downloads/qt-everywhere-src-5.15.0 (1)/qt-everywhere-src-5.15.0/qtbase/src/plugins/sqldrivers/mysql" -IC:/Qt/5.15.0/msvc2019_64/include/QtSql/5.15.0 -IC:/Qt/5.15.0/msvc2019_64/include/QtSql/5.15.0/QtSql -IC:/Qt/5.15.0/msvc2019_64/include/QtCore/5.15.0 -IC:/Qt/5.15.0/msvc2019_64/include/QtCore/5.15.0/QtCore -IC:/Qt/5.15.0/msvc2019_64/include -IC:/Qt/5.15.0/msvc2019_64/include/QtSql -IC:/Qt/5.15.0/msvc2019_64/include/QtCore -I"C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\INCLUDE" -I"C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\ATLMFC\INCLUDE" -I"C:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\ucrt" -I"C:\Program Files (x86)\Windows Kits\NETFXSDK\4.6.1\include\um" -I"C:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\shared" -I"C:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\um" -I"C:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\winrt" qsql_mysql_p.h -o .moc\release\moc_qsql_mysql_p.cpp
        rc /NOLOGO -DUNICODE -D_UNICODE -DWIN32 -D_ENABLE_EXTENDED_ALIGNED_STORAGE -DWIN64 -DQT_NO_LINKED_LIST -DQT_NO_JAVA_STYLE_ITERATORS -DQT_DEPRECATED_WARNINGS -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_ASCII -DNDEBUG -DQT_NO_EXCEPTIONS -DQT_NO_DEBUG -DQT_PLUGIN -DQT_SQL_LIB -DQT_CORE_LIB -D_WINDLL -fo .obj\release\qsqlmysql_resource.res qsqlmysql_resource.rc
        cl -c -nologo -Zc:wchar_t -FS -Zc:rvalueCast -Zc:inline -Zc:strictStrings -Zc:throwingNew -O2 -Zi -MD -utf-8 /wd4530 /wd4577 -W3 -w34100 -w34189 -w44996 -w44456 -w44457 -w44458 -wd4577 -wd4467 /Fd.obj\release\qsqlmysql.vc.pdb -DUNICODE -D_UNICODE -DWIN32 -D_ENABLE_EXTENDED_ALIGNED_STORAGE -DWIN64 -DQT_NO_LINKED_LIST -DQT_NO_JAVA_STYLE_ITERATORS -DQT_DEPRECATED_WARNINGS -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_ASCII -DNDEBUG -DQT_NO_EXCEPTIONS -DQT_NO_DEBUG -DQT_PLUGIN -DQT_SQL_LIB -DQT_CORE_LIB -D_WINDLL -I. -IC:\Qt\5.15.0\msvc2019_64\include\QtSql\5.15.0 -IC:\Qt\5.15.0\msvc2019_64\include\QtSql\5.15.0\QtSql -IC:\Qt\5.15.0\msvc2019_64\include\QtCore\5.15.0 -IC:\Qt\5.15.0\msvc2019_64\include\QtCore\5.15.0\QtCore -IC:\Qt\5.15.0\msvc2019_64\include -IC:\Qt\5.15.0\msvc2019_64\include\QtSql -IC:\Qt\5.15.0\msvc2019_64\include\QtCore -I.moc\release -I"C:\Program Files\MySQL\MySQL Connector C 6.1\include" -IC:\openssl\include -IC:\Utils\my_sql\mysql-5.7.25-winx64\include -IC:\Utils\postgresql\pgsql\include -IC:\Qt\5.15.0\msvc2019_64\mkspecs\win32-msvc -Fo.obj\release\ @C:\Users\39328\AppData\Local\Temp\nm8072.tmp
qsql_mysql.cpp
main.cpp
Generating Code...
        cl -c -nologo -Zc:wchar_t -FS -Zc:rvalueCast -Zc:inline -Zc:strictStrings -Zc:throwingNew -O2 -Zi -MD -utf-8 /wd4530 /wd4577 -W3 -w34100 -w34189 -w44996 -w44456 -w44457 -w44458 -wd4577 -wd4467 /Fd.obj\release\qsqlmysql.vc.pdb -DUNICODE -D_UNICODE -DWIN32 -D_ENABLE_EXTENDED_ALIGNED_STORAGE -DWIN64 -DQT_NO_LINKED_LIST -DQT_NO_JAVA_STYLE_ITERATORS -DQT_DEPRECATED_WARNINGS -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_ASCII -DNDEBUG -DQT_NO_EXCEPTIONS -DQT_NO_DEBUG -DQT_PLUGIN -DQT_SQL_LIB -DQT_CORE_LIB -D_WINDLL -I. -IC:\Qt\5.15.0\msvc2019_64\include\QtSql\5.15.0 -IC:\Qt\5.15.0\msvc2019_64\include\QtSql\5.15.0\QtSql -IC:\Qt\5.15.0\msvc2019_64\include\QtCore\5.15.0 -IC:\Qt\5.15.0\msvc2019_64\include\QtCore\5.15.0\QtCore -IC:\Qt\5.15.0\msvc2019_64\include -IC:\Qt\5.15.0\msvc2019_64\include\QtSql -IC:\Qt\5.15.0\msvc2019_64\include\QtCore -I.moc\release -I"C:\Program Files\MySQL\MySQL Connector C 6.1\include" -IC:\openssl\include -IC:\Utils\my_sql\mysql-5.7.25-winx64\include -IC:\Utils\postgresql\pgsql\include -IC:\Qt\5.15.0\msvc2019_64\mkspecs\win32-msvc -Fo.obj\release\ @C:\Users\39328\AppData\Local\Temp\nm8AB4.tmp
moc_qsql_mysql_p.cpp
        link /NOLOGO /DYNAMICBASE /NXCOMPAT /DEBUG /OPT:REF /INCREMENTAL:NO /DLL /SUBSYSTEM:WINDOWS /VERSION:5.15 /OUT:..\plugins\sqldrivers\qsqlmysql.dll @C:\Users\39328\AppData\Local\Temp\nm8E7E.tmp
   Creating library ..\plugins\sqldrivers\qsqlmysql.lib and object ..\plugins\sqldrivers\qsqlmysql.exp
        "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.26.28801\bin\HostX64\x64\nmake.exe" -f Makefile.Debug all

Microsoft (R) Program Maintenance Utility Version 14.26.28806.0
Copyright (C) Microsoft Corporation.  All rights reserved.

        cl -BxC:\Qt\5.15.0\msvc2019_64\bin\qmake.exe -nologo -Zc:wchar_t -FS -Zc:rvalueCast -Zc:inline -Zc:strictStrings -Zc:throwingNew -Zi -MDd -utf-8 /wd4530 /wd4577 -W3 -w34100 -w34189 -w44996 -w44456 -w44457 -w44458 -wd4577 -wd4467 -E C:\Qt\5.15.0\msvc2019_64\mkspecs\features\data\dummy.cpp 2>NUL >.moc\debug\moc_predefs.h
        C:\Qt\5.15.0\msvc2019_64\bin\moc.exe -DUNICODE -D_UNICODE -DWIN32 -D_ENABLE_EXTENDED_ALIGNED_STORAGE -DWIN64 -DQT_NO_LINKED_LIST -DQT_NO_JAVA_STYLE_ITERATORS -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 -D_WINDLL --compiler-flavor=msvc --include "C:/Users/39328/Downloads/qt-everywhere-src-5.15.0 (1)/qt-everywhere-src-5.15.0/qtbase/src/plugins/sqldrivers/mysql/.moc/debug/moc_predefs.h" -IC:/Qt/5.15.0/msvc2019_64/mkspecs/win32-msvc -I"C:/Users/39328/Downloads/qt-everywhere-src-5.15.0 (1)/qt-everywhere-src-5.15.0/qtbase/src/plugins/sqldrivers/mysql" -IC:/Qt/5.15.0/msvc2019_64/include/QtSql/5.15.0 -IC:/Qt/5.15.0/msvc2019_64/include/QtSql/5.15.0/QtSql -IC:/Qt/5.15.0/msvc2019_64/include/QtCore/5.15.0 -IC:/Qt/5.15.0/msvc2019_64/include/QtCore/5.15.0/QtCore -IC:/Qt/5.15.0/msvc2019_64/include -IC:/Qt/5.15.0/msvc2019_64/include/QtSql -IC:/Qt/5.15.0/msvc2019_64/include/QtCore -I"C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\INCLUDE" -I"C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\ATLMFC\INCLUDE" -I"C:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\ucrt" -I"C:\Program Files (x86)\Windows Kits\NETFXSDK\4.6.1\include\um" -I"C:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\shared" -I"C:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\um" -I"C:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\winrt" main.cpp -o .moc\debug\main.moc
        C:\Qt\5.15.0\msvc2019_64\bin\moc.exe -DUNICODE -D_UNICODE -DWIN32 -D_ENABLE_EXTENDED_ALIGNED_STORAGE -DWIN64 -DQT_NO_LINKED_LIST -DQT_NO_JAVA_STYLE_ITERATORS -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 -D_WINDLL --compiler-flavor=msvc --include "C:/Users/39328/Downloads/qt-everywhere-src-5.15.0 (1)/qt-everywhere-src-5.15.0/qtbase/src/plugins/sqldrivers/mysql/.moc/debug/moc_predefs.h" -IC:/Qt/5.15.0/msvc2019_64/mkspecs/win32-msvc -I"C:/Users/39328/Downloads/qt-everywhere-src-5.15.0 (1)/qt-everywhere-src-5.15.0/qtbase/src/plugins/sqldrivers/mysql" -IC:/Qt/5.15.0/msvc2019_64/include/QtSql/5.15.0 -IC:/Qt/5.15.0/msvc2019_64/include/QtSql/5.15.0/QtSql -IC:/Qt/5.15.0/msvc2019_64/include/QtCore/5.15.0 -IC:/Qt/5.15.0/msvc2019_64/include/QtCore/5.15.0/QtCore -IC:/Qt/5.15.0/msvc2019_64/include -IC:/Qt/5.15.0/msvc2019_64/include/QtSql -IC:/Qt/5.15.0/msvc2019_64/include/QtCore -I"C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\INCLUDE" -I"C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\ATLMFC\INCLUDE" -I"C:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\ucrt" -I"C:\Program Files (x86)\Windows Kits\NETFXSDK\4.6.1\include\um" -I"C:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\shared" -I"C:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\um" -I"C:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\winrt" qsql_mysql_p.h -o .moc\debug\moc_qsql_mysql_p.cpp
        rc /NOLOGO -D_DEBUG -DUNICODE -D_UNICODE -DWIN32 -D_ENABLE_EXTENDED_ALIGNED_STORAGE -DWIN64 -DQT_NO_LINKED_LIST -DQT_NO_JAVA_STYLE_ITERATORS -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 -D_WINDLL -fo .obj\debug\qsqlmysqld_resource.res qsqlmysqld_resource.rc
        cl -c -nologo -Zc:wchar_t -FS -Zc:rvalueCast -Zc:inline -Zc:strictStrings -Zc:throwingNew -Zi -MDd -utf-8 /wd4530 /wd4577 -W3 -w34100 -w34189 -w44996 -w44456 -w44457 -w44458 -wd4577 -wd4467 /Fd.obj\debug\qsqlmysqld.vc.pdb -DUNICODE -D_UNICODE -DWIN32 -D_ENABLE_EXTENDED_ALIGNED_STORAGE -DWIN64 -DQT_NO_LINKED_LIST -DQT_NO_JAVA_STYLE_ITERATORS -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 -D_WINDLL -I. -IC:\Qt\5.15.0\msvc2019_64\include\QtSql\5.15.0 -IC:\Qt\5.15.0\msvc2019_64\include\QtSql\5.15.0\QtSql -IC:\Qt\5.15.0\msvc2019_64\include\QtCore\5.15.0 -IC:\Qt\5.15.0\msvc2019_64\include\QtCore\5.15.0\QtCore -IC:\Qt\5.15.0\msvc2019_64\include -IC:\Qt\5.15.0\msvc2019_64\include\QtSql -IC:\Qt\5.15.0\msvc2019_64\include\QtCore -I.moc\debug -I"C:\Program Files\MySQL\MySQL Connector C 6.1\include" -IC:\openssl\include -IC:\Utils\my_sql\mysql-5.7.25-winx64\include -IC:\Utils\postgresql\pgsql\include -IC:\Qt\5.15.0\msvc2019_64\mkspecs\win32-msvc -Fo.obj\debug\ @C:\Users\39328\AppData\Local\Temp\nm965B.tmp
qsql_mysql.cpp
main.cpp
Generating Code...
        cl -c -nologo -Zc:wchar_t -FS -Zc:rvalueCast -Zc:inline -Zc:strictStrings -Zc:throwingNew -Zi -MDd -utf-8 /wd4530 /wd4577 -W3 -w34100 -w34189 -w44996 -w44456 -w44457 -w44458 -wd4577 -wd4467 /Fd.obj\debug\qsqlmysqld.vc.pdb -DUNICODE -D_UNICODE -DWIN32 -D_ENABLE_EXTENDED_ALIGNED_STORAGE -DWIN64 -DQT_NO_LINKED_LIST -DQT_NO_JAVA_STYLE_ITERATORS -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 -D_WINDLL -I. -IC:\Qt\5.15.0\msvc2019_64\include\QtSql\5.15.0 -IC:\Qt\5.15.0\msvc2019_64\include\QtSql\5.15.0\QtSql -IC:\Qt\5.15.0\msvc2019_64\include\QtCore\5.15.0 -IC:\Qt\5.15.0\msvc2019_64\include\QtCore\5.15.0\QtCore -IC:\Qt\5.15.0\msvc2019_64\include -IC:\Qt\5.15.0\msvc2019_64\include\QtSql -IC:\Qt\5.15.0\msvc2019_64\include\QtCore -I.moc\debug -I"C:\Program Files\MySQL\MySQL Connector C 6.1\include" -IC:\openssl\include -IC:\Utils\my_sql\mysql-5.7.25-winx64\include -IC:\Utils\postgresql\pgsql\include -IC:\Qt\5.15.0\msvc2019_64\mkspecs\win32-msvc -Fo.obj\debug\ @C:\Users\39328\AppData\Local\Temp\nm9F17.tmp
moc_qsql_mysql_p.cpp
        link /NOLOGO /DYNAMICBASE /NXCOMPAT /DEBUG /DLL /SUBSYSTEM:WINDOWS /VERSION:5.15 /OUT:..\plugins\sqldrivers\qsqlmysqld.dll @C:\Users\39328\AppData\Local\Temp\nmA2E1.tmp
   Creating library ..\plugins\sqldrivers\qsqlmysqld.lib and object ..\plugins\sqldrivers\qsqlmysqld.exp

C:\Users\39328\Downloads\qt-everywhere-src-5.15.0 (1)\qt-everywhere-src-5.15.0\qtbase\src\plugins\sqldrivers>nmake install

Microsoft (R) Program Maintenance Utility Version 14.26.28806.0
Copyright (C) Microsoft Corporation.  All rights reserved.

        cd mysql\ && ( if not exist Makefile C:\Qt\5.15.0\msvc2019_64\bin\qmake.exe -o Makefile "C:\Users\39328\Downloads\qt-everywhere-src-5.15.0 (1)\qt-everywhere-src-5.15.0\qtbase\src\plugins\sqldrivers\mysql\mysql.pro" ) && "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.26.28801\bin\HostX64\x64\nmake.exe" -f Makefile install

Microsoft (R) Program Maintenance Utility Version 14.26.28806.0
Copyright (C) Microsoft Corporation.  All rights reserved.

        "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.26.28801\bin\HostX64\x64\nmake.exe" -f Makefile.Release install

Microsoft (R) Program Maintenance Utility Version 14.26.28806.0
Copyright (C) Microsoft Corporation.  All rights reserved.

        copy /y ..\plugins\sqldrivers\qsqlmysql.dll C:\Qt\5.15.0\msvc2019_64\plugins\sqldrivers\qsqlmysql.dll
        1 file(s) copied.
        copy /y ..\plugins\sqldrivers\qsqlmysql.pdb C:\Qt\5.15.0\msvc2019_64\plugins\sqldrivers\qsqlmysql.pdb
        1 file(s) copied.
        C:\Qt\5.15.0\msvc2019_64\bin\qmake.exe -install qinstall "C:\Users\39328\Downloads\qt-everywhere-src-5.15.0 (1)\qt-everywhere-src-5.15.0\qtbase\src\plugins\sqldrivers\lib\cmake\Qt5Sql\Qt5Sql_QMYSQLDriverPlugin.cmake" C:\Qt\5.15.0\msvc2019_64\lib\cmake\Qt5Sql\Qt5Sql_QMYSQLDriverPlugin.cmake
        "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.26.28801\bin\HostX64\x64\nmake.exe" -f Makefile.Debug install

Microsoft (R) Program Maintenance Utility Version 14.26.28806.0
Copyright (C) Microsoft Corporation.  All rights reserved.

        copy /y ..\plugins\sqldrivers\qsqlmysqld.dll C:\Qt\5.15.0\msvc2019_64\plugins\sqldrivers\qsqlmysqld.dll
        1 file(s) copied.
        copy /y ..\plugins\sqldrivers\qsqlmysqld.pdb C:\Qt\5.15.0\msvc2019_64\plugins\sqldrivers\qsqlmysqld.pdb
        1 file(s) copied.
        C:\Qt\5.15.0\msvc2019_64\bin\qmake.exe -install qinstall "C:\Users\39328\Downloads\qt-everywhere-src-5.15.0 (1)\qt-everywhere-src-5.15.0\qtbase\src\plugins\sqldrivers\lib\cmake\Qt5Sql\Qt5Sql_QMYSQLDriverPlugin.cmake" C:\Qt\5.15.0\msvc2019_64\lib\cmake\Qt5Sql\Qt5Sql_QMYSQLDriverPlugin.cmake
        cd odbc\ && ( if not exist Makefile C:\Qt\5.15.0\msvc2019_64\bin\qmake.exe -o Makefile "C:\Users\39328\Downloads\qt-everywhere-src-5.15.0 (1)\qt-everywhere-src-5.15.0\qtbase\src\plugins\sqldrivers\odbc\odbc.pro" ) && "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.26.28801\bin\HostX64\x64\nmake.exe" -f Makefile install
Microsoft (R) Program Maintenance Utility Version 14.26.28806.0
Copyright (C) Microsoft Corporation.  All rights reserved.

        "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.26.28801\bin\HostX64\x64\nmake.exe" -f Makefile.Release install

Microsoft (R) Program Maintenance Utility Version 14.26.28806.0
Copyright (C) Microsoft Corporation.  All rights reserved.

        link /NOLOGO /DYNAMICBASE /NXCOMPAT /DEBUG /OPT:REF /INCREMENTAL:NO /DLL /SUBSYSTEM:WINDOWS /VERSION:5.15 /OUT:..\plugins\sqldrivers\qsqlodbc.dll @C:\Users\39328\AppData\Local\Temp\nmC7EB.tmp
Qt5Sql.lib(Qt5Sql.dll) : fatal error LNK1112: module machine type 'x64' conflicts with target machine type 'x86'
NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.26.28801\bin\HostX64\x64\link.EXE"' : return code '0x458'
Stop.
NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.26.28801\bin\HostX64\x64\nmake.exe"' : return code '0x2'
Stop.
NMAKE : fatal error U1077: 'cd' : return code '0x2'
Stop.

This is the output of the log file:

Command line: "MYSQL_INCDIR=C:/Program Files/MySQL/MySQL Connector C 6.1/include" "MYSQL_LIBDIR=C:/Program Files/MySQL/MySQL Connector C 6.1/lib"
Global lib dirs: [C:\\openssl\\lib C:\\Utils\\my_sql\\mysql-5.7.25-winx64\\lib C:\\Utils\\postgresql\\pgsql\\lib] ["C:\\Program Files (x86)\\Microsoft Visual Studio 14.0\\VC\\LIB\\amd64" "C:\\Program Files (x86)\\Microsoft Visual Studio 14.0\\VC\\ATLMFC\\LIB\\amd64" "C:\\Program Files (x86)\\Windows Kits\\10\\lib\\10.0.17763.0\\ucrt\\x64" "C:\\Program Files (x86)\\Windows Kits\\NETFXSDK\\4.6.1\\lib\\um\\x64" "C:\\Program Files (x86)\\Windows Kits\\10\\lib\\10.0.17763.0\\um\\x64"]
Global inc dirs: [C:\\openssl\\include C:\\Utils\\my_sql\\mysql-5.7.25-winx64\\include C:\\Utils\\postgresql\\pgsql\\include] ["C:\\Program Files (x86)\\Microsoft Visual Studio 14.0\\VC\\INCLUDE" "C:\\Program Files (x86)\\Microsoft Visual Studio 14.0\\VC\\ATLMFC\\INCLUDE" "C:\\Program Files (x86)\\Windows Kits\\10\\include\\10.0.17763.0\\ucrt" "C:\\Program Files (x86)\\Windows Kits\\NETFXSDK\\4.6.1\\include\\um" "C:\\Program Files (x86)\\Windows Kits\\10\\include\\10.0.17763.0\\shared" "C:\\Program Files (x86)\\Windows Kits\\10\\include\\10.0.17763.0\\um" "C:\\Program Files (x86)\\Windows Kits\\10\\include\\10.0.17763.0\\winrt"]
looking for library db2
Trying source 0 (type inline) of library db2 ...
sqlcli.h not found in [] and global paths.
sqlcli1.h not found in [] and global paths.
  => source produced no result.
Trying source 1 (type inline) of library db2 ...
  => source failed condition '!config.win32'.
test config.sqldrivers.libraries.db2 FAILED
looking for library ibase
Trying source 0 (type inline) of library ibase ...
ibase.h not found in [] and global paths.
  => source produced no result.
Trying source 1 (type inline) of library ibase ...
  => source failed condition '!config.win32'.
test config.sqldrivers.libraries.ibase FAILED
looking for library mysql
Trying source 0 (type mysqlConfig) of library mysql ...
mysql_config not found.
  => source produced no result.
Trying source 1 (type mysqlConfig) of library mysql ...
mysql_config not found.
  => source produced no result.
Trying source 2 (type mysqlConfig) of library mysql ...
mysql_config not found.
  => source produced no result.
Trying source 3 (type mysqlConfig) of library mysql ...
mysql_config not found.
  => source produced no result.
Trying source 4 (type inline) of library mysql ...
  => source failed condition '!config.win32'.
Trying source 5 (type inline) of library mysql ...
+ cd /d "C:\Users\39328\Downloads\qt-everywhere-src-5.15.0 (1)\qt-everywhere-src-5.15.0\qtbase\src\plugins\sqldrivers\config.tests\mysql" && C:\Qt\5.15.0\msvc2019_64\bin\qmake.exe "CONFIG -= qt debug_and_release app_bundle lib_bundle" "CONFIG += shared warn_off console single_arch" "QMAKE_LIBDIR += C:\\openssl\\lib C:\\Utils\\my_sql\\mysql-5.7.25-winx64\\lib C:\\Utils\\postgresql\\pgsql\\lib" "INCLUDEPATH += C:\\openssl\\include C:\\Utils\\my_sql\\mysql-5.7.25-winx64\\include C:\\Utils\\postgresql\\pgsql\\include" "QMAKE_USE += mysql" "QMAKE_LIBS_MYSQL = \"-LC:/Program Files/MySQL/MySQL Connector C 6.1/lib\" -llibmariadb" "QMAKE_INCDIR_MYSQL = \"C:/Program Files/MySQL/MySQL Connector C 6.1/include\"" "C:/Users/39328/Downloads/qt-everywhere-src-5.15.0 (1)/qt-everywhere-src-5.15.0/qtbase/src/plugins/sqldrivers/config.tests/mysql"
+ cd /d "C:\Users\39328\Downloads\qt-everywhere-src-5.15.0 (1)\qt-everywhere-src-5.15.0\qtbase\src\plugins\sqldrivers\config.tests\mysql" && set MAKEFLAGS=& nmake clean && set MAKEFLAGS=& nmake
> Microsoft (R) Program Maintenance Utility Version 14.26.28806.0
> Copyright (C) Microsoft Corporation.  All rights reserved.
> 	del main.obj
> Microsoft (R) Program Maintenance Utility Version 14.26.28806.0
> Copyright (C) Microsoft Corporation.  All rights reserved.
> 	cl -c -nologo -Zc:wchar_t -FS -Zc:rvalueCast -Zc:inline -Zc:strictStrings -Zc:throwingNew -O2 -MD -W0 -EHsc -DUNICODE -D_UNICODE -DWIN32 -D_ENABLE_EXTENDED_ALIGNED_STORAGE -DWIN64 -DNDEBUG -I. -IC:\openssl\include -IC:\Utils\my_sql\mysql-5.7.25-winx64\include -IC:\Utils\postgresql\pgsql\include -I"C:\Program Files\MySQL\MySQL Connector C 6.1\include" -IC:\Qt\5.15.0\msvc2019_64\mkspecs\win32-msvc -Fo @C:\Users\39328\AppData\Local\Temp\nm1D24.tmp
> main.cpp
> 	link /NOLOGO /DYNAMICBASE /NXCOMPAT /OPT:REF /INCREMENTAL:NO /SUBSYSTEM:CONSOLE "/MANIFESTDEPENDENCY:type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' publicKeyToken='6595b64144ccf1df' language='*' processorArchitecture='*'" /MANIFEST:embed /OUT:mysql.exe @C:\Users\39328\AppData\Local\Temp\nm2023.tmp
> LINK : fatal error LNK1181: cannot open input file 'libmariadb.lib'
> NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.26.28801\bin\HostX64\x64\link.EXE"' : return code '0x49d'
> Stop.
 => source failed verification.
Trying source 6 (type inline) of library mysql ...
+ cd /d "C:\Users\39328\Downloads\qt-everywhere-src-5.15.0 (1)\qt-everywhere-src-5.15.0\qtbase\src\plugins\sqldrivers\config.tests\mysql" && C:\Qt\5.15.0\msvc2019_64\bin\qmake.exe "CONFIG -= qt debug_and_release app_bundle lib_bundle" "CONFIG += shared warn_off console single_arch" "QMAKE_LIBDIR += C:\\openssl\\lib C:\\Utils\\my_sql\\mysql-5.7.25-winx64\\lib C:\\Utils\\postgresql\\pgsql\\lib" "INCLUDEPATH += C:\\openssl\\include C:\\Utils\\my_sql\\mysql-5.7.25-winx64\\include C:\\Utils\\postgresql\\pgsql\\include" "QMAKE_USE += mysql" "QMAKE_LIBS_MYSQL = \"-LC:/Program Files/MySQL/MySQL Connector C 6.1/lib\" -llibmysql" "QMAKE_INCDIR_MYSQL = \"C:/Program Files/MySQL/MySQL Connector C 6.1/include\"" "C:/Users/39328/Downloads/qt-everywhere-src-5.15.0 (1)/qt-everywhere-src-5.15.0/qtbase/src/plugins/sqldrivers/config.tests/mysql"
+ cd /d "C:\Users\39328\Downloads\qt-everywhere-src-5.15.0 (1)\qt-everywhere-src-5.15.0\qtbase\src\plugins\sqldrivers\config.tests\mysql" && set MAKEFLAGS=& nmake clean && set MAKEFLAGS=& nmake
> Microsoft (R) Program Maintenance Utility Version 14.26.28806.0
> Copyright (C) Microsoft Corporation.  All rights reserved.
> 	del main.obj
> Microsoft (R) Program Maintenance Utility Version 14.26.28806.0
> Copyright (C) Microsoft Corporation.  All rights reserved.
> 	cl -c -nologo -Zc:wchar_t -FS -Zc:rvalueCast -Zc:inline -Zc:strictStrings -Zc:throwingNew -O2 -MD -W0 -EHsc -DUNICODE -D_UNICODE -DWIN32 -D_ENABLE_EXTENDED_ALIGNED_STORAGE -DWIN64 -DNDEBUG -I. -IC:\openssl\include -IC:\Utils\my_sql\mysql-5.7.25-winx64\include -IC:\Utils\postgresql\pgsql\include -I"C:\Program Files\MySQL\MySQL Connector C 6.1\include" -IC:\Qt\5.15.0\msvc2019_64\mkspecs\win32-msvc -Fo @C:\Users\39328\AppData\Local\Temp\nm213B.tmp
> main.cpp
> 	link /NOLOGO /DYNAMICBASE /NXCOMPAT /OPT:REF /INCREMENTAL:NO /SUBSYSTEM:CONSOLE "/MANIFESTDEPENDENCY:type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' publicKeyToken='6595b64144ccf1df' language='*' processorArchitecture='*'" /MANIFEST:embed /OUT:mysql.exe @C:\Users\39328\AppData\Local\Temp\nm22E2.tmp
 => source accepted.
test config.sqldrivers.libraries.mysql succeeded
looking for library oci
Trying source 0 (type inline) of library oci ...
oci.h not found in [] and global paths.
  => source produced no result.
Trying source 1 (type inline) of library oci ...
  => source failed condition '!config.win32'.
test config.sqldrivers.libraries.oci FAILED
looking for library odbc
Trying source 0 (type inline) of library odbc ...
+ cd /d "C:\Users\39328\Downloads\qt-everywhere-src-5.15.0 (1)\qt-everywhere-src-5.15.0\qtbase\src\plugins\sqldrivers\config.tests\odbc" && C:\Qt\5.15.0\msvc2019_64\bin\qmake.exe "CONFIG -= qt debug_and_release app_bundle lib_bundle" "CONFIG += shared warn_off console single_arch" "QMAKE_LIBDIR += C:\\openssl\\lib C:\\Utils\\my_sql\\mysql-5.7.25-winx64\\lib C:\\Utils\\postgresql\\pgsql\\lib" "INCLUDEPATH += C:\\openssl\\include C:\\Utils\\my_sql\\mysql-5.7.25-winx64\\include C:\\Utils\\postgresql\\pgsql\\include" "QMAKE_USE += odbc" "QMAKE_LIBS_ODBC = -lodbc32" "C:/Users/39328/Downloads/qt-everywhere-src-5.15.0 (1)/qt-everywhere-src-5.15.0/qtbase/src/plugins/sqldrivers/config.tests/odbc"
+ cd /d "C:\Users\39328\Downloads\qt-everywhere-src-5.15.0 (1)\qt-everywhere-src-5.15.0\qtbase\src\plugins\sqldrivers\config.tests\odbc" && set MAKEFLAGS=& nmake clean && set MAKEFLAGS=& nmake
> Microsoft (R) Program Maintenance Utility Version 14.26.28806.0
> Copyright (C) Microsoft Corporation.  All rights reserved.
> 	del main.obj
> Microsoft (R) Program Maintenance Utility Version 14.26.28806.0
> Copyright (C) Microsoft Corporation.  All rights reserved.
> 	cl -c -nologo -Zc:wchar_t -FS -Zc:rvalueCast -Zc:inline -Zc:strictStrings -Zc:throwingNew -O2 -MD -W0 -EHsc -DUNICODE -D_UNICODE -DWIN32 -D_ENABLE_EXTENDED_ALIGNED_STORAGE -DWIN64 -DNDEBUG -I. -IC:\openssl\include -IC:\Utils\my_sql\mysql-5.7.25-winx64\include -IC:\Utils\postgresql\pgsql\include -IC:\Qt\5.15.0\msvc2019_64\mkspecs\win32-msvc -Fo @C:\Users\39328\AppData\Local\Temp\nm2458.tmp
> main.cpp
> 	link /NOLOGO /DYNAMICBASE /NXCOMPAT /OPT:REF /INCREMENTAL:NO /SUBSYSTEM:CONSOLE "/MANIFESTDEPENDENCY:type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' publicKeyToken='6595b64144ccf1df' language='*' processorArchitecture='*'" /MANIFEST:embed /OUT:odbc.exe @C:\Users\39328\AppData\Local\Temp\nm25EF.tmp
 => source accepted.
test config.sqldrivers.libraries.odbc succeeded
looking for library psql
Trying source 0 (type pkgConfig) of library psql ...
pkg-config use disabled globally.
  => source produced no result.
Trying source 1 (type psqlConfig) of library psql ...
pg_config not found.
  => source produced no result.
Trying source 2 (type psqlEnv) of library psql ...
libpq-fe.h not found in [] and global paths.
  => source produced no result.
Trying source 3 (type psqlEnv) of library psql ...
  => source failed condition '!config.win32'.
test config.sqldrivers.libraries.psql FAILED
looking for library sqlite2
Trying source 0 (type inline) of library sqlite2 ...
sqlite.h not found in [] and global paths.
  => source produced no result.
test config.sqldrivers.libraries.sqlite2 FAILED
looking for library tds
Trying source 0 (type sybaseEnv) of library tds ...
+ cd /d "C:\Users\39328\Downloads\qt-everywhere-src-5.15.0 (1)\qt-everywhere-src-5.15.0\qtbase\src\plugins\sqldrivers\config.tests\tds" && C:\Qt\5.15.0\msvc2019_64\bin\qmake.exe "CONFIG -= qt debug_and_release app_bundle lib_bundle" "CONFIG += shared warn_off console single_arch" "QMAKE_LIBDIR += C:\\openssl\\lib C:\\Utils\\my_sql\\mysql-5.7.25-winx64\\lib C:\\Utils\\postgresql\\pgsql\\lib" "INCLUDEPATH += C:\\openssl\\include C:\\Utils\\my_sql\\mysql-5.7.25-winx64\\include C:\\Utils\\postgresql\\pgsql\\include" "QMAKE_USE += tds" "QMAKE_LIBS_TDS = -lNTWDBLIB" "C:/Users/39328/Downloads/qt-everywhere-src-5.15.0 (1)/qt-everywhere-src-5.15.0/qtbase/src/plugins/sqldrivers/config.tests/tds"
+ cd /d "C:\Users\39328\Downloads\qt-everywhere-src-5.15.0 (1)\qt-everywhere-src-5.15.0\qtbase\src\plugins\sqldrivers\config.tests\tds" && set MAKEFLAGS=& nmake clean && set MAKEFLAGS=& nmake
> Microsoft (R) Program Maintenance Utility Version 14.26.28806.0
> Copyright (C) Microsoft Corporation.  All rights reserved.
> 	del main.obj
> Could Not Find C:\Users\39328\Downloads\qt-everywhere-src-5.15.0 (1)\qt-everywhere-src-5.15.0\qtbase\src\plugins\sqldrivers\config.tests\tds\main.obj
> Microsoft (R) Program Maintenance Utility Version 14.26.28806.0
> Copyright (C) Microsoft Corporation.  All rights reserved.
> 	cl -c -nologo -Zc:wchar_t -FS -Zc:rvalueCast -Zc:inline -Zc:strictStrings -Zc:throwingNew -O2 -MD -W0 -EHsc -DUNICODE -D_UNICODE -DWIN32 -D_ENABLE_EXTENDED_ALIGNED_STORAGE -DWIN64 -DNDEBUG -I. -IC:\openssl\include -IC:\Utils\my_sql\mysql-5.7.25-winx64\include -IC:\Utils\postgresql\pgsql\include -IC:\Qt\5.15.0\msvc2019_64\mkspecs\win32-msvc -Fo @C:\Users\39328\AppData\Local\Temp\nm2736.tmp
> main.cpp
> .\main.cpp(2): fatal error C1083: Cannot open include file: 'sybfront.h': No such file or directory
> NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.26.28801\bin\HostX64\x64\cl.EXE"' : return code '0x2'
> Stop.
 => source failed verification.
Trying source 1 (type sybaseEnv) of library tds ...
  => source failed condition '!config.win32'.
test config.sqldrivers.libraries.tds FAILED

P.S. do I need to run vcvarsall.bat after qtenv2.bat?

[Bonnie]

P.S. do I need to run vcvarsall.bat after qtenv2.bat?

No, Native tools command prompt have called vcvarsall.bat so you don't need to run it again.

C:\Program Files (x86)\Windows Kits\10\bin\x64;C:\Program Files (x86)\Windows Kits\10\bin\x86;

This seems not right.
There should not be x64 and x86 bin in the PATH at the same time.
And your PATH value seems quite messed up...I'm not sure where do they come from...
What is the path output from a normal command prompt?
You may need to do some cleanup and delete some values...

[Marcus Barnet]

output from normal command prompt:

C:\Program Files\VCG\MeshLab>path
PATH=C:\Program Files (x86)\Common Files\Oracle\Java\javapath;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\iCLS\;C:\Program Files\Intel\Intel(R) Management Engine Components\iCLS\;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Windows\System32\OpenSSH\;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Program Files\dotnet\;C:\Program Files\Point Grey Research\FlyCapture2\bin64;C:\Program Files\Point Grey Research\FlyCapture2\bin64\vs2013;C:\Program Files\Point Grey Research\FlyCapture2\bin64\vs2015;C:\Program Files\Microsoft SQL Server\Client SDK\ODBC\110\Tools\Binn\;C:\Program Files (x86)\Microsoft SQL Server\120\Tools\Binn\;C:\Program Files\Microsoft SQL Server\120\Tools\Binn\;C:\Program Files\Microsoft SQL Server\120\DTS\Binn\;C:\Program Files (x86)\Windows Kits\8.1\Windows Performance Toolkit\;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;C:\Program Files\Intel\WiFi\bin\;C:\Program Files\Common Files\Intel\WirelessCommon\;C:\Program Files (x86)\Sontheim\MT_Api;C:\Program Files (x86)\Sontheim\MT_Api\;C:\Server\PHP;C:\WINDOWS\system32\config\systemprofile\.dnx\bin;C:\Program Files\Microsoft DNX\Dnvm\;C:\Program Files (x86)\nodejs\;C:\Program Files\Git\cmd;C:\Program Files\Microsoft SQL Server\130\Tools\Binn\;C:\Program Files (x86)\Windows Kits\10\Windows Performance Toolkit\;C:\Program Files\Microsoft SQL Server\Client SDK\ODBC\170\Tools\Binn\;C:\Program Files\MySQL\MySQL Shell 8.0\bin\;C:\Users\39328\AppData\Local\Microsoft\WindowsApps;C:\Users\39328\AppData\Roaming\npm;C:\Users\39328\.dotnet\tools

output from x64 VS2019 native tools:

**********************************************************************
** Visual Studio 2019 Developer Command Prompt v16.6.5
** Copyright (c) 2020 Microsoft Corporation
**********************************************************************
[vcvarsall.bat] Environment initialized for: 'x64'

C:\Program Files (x86)\Microsoft Visual Studio\2019\Community>path
PATH=C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\\Extensions\Microsoft\IntelliCode\CLI;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.26.28801\bin\HostX64\x64;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\VC\VCPackages;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\CommonExtensions\Microsoft\TestWindow;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\CommonExtensions\Microsoft\TeamFoundation\Team Explorer;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\bin\Roslyn;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Team Tools\Performance Tools\x64;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Team Tools\Performance Tools;C:\Program Files (x86)\Microsoft Visual Studio\Shared\Common\VSPerfCollectionTools\vs2019\\x64;C:\Program Files (x86)\Microsoft Visual Studio\Shared\Common\VSPerfCollectionTools\vs2019\;C:\Program Files (x86)\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.8 Tools\x64\;C:\Program Files (x86)\HTML Help Workshop;C:\Program Files (x86)\Windows Kits\10\bin\10.0.19041.0\x64;C:\Program Files (x86)\Windows Kits\10\bin\x64;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\\MSBuild\Current\Bin;C:\WINDOWS\Microsoft.NET\Framework64\v4.0.30319;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\Tools\;C:\Program Files (x86)\Common Files\Oracle\Java\javapath;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\iCLS\;C:\Program Files\Intel\Intel(R) Management Engine Components\iCLS\;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Windows\System32\OpenSSH\;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Program Files\dotnet\;C:\Program Files\Point Grey Research\FlyCapture2\bin64;C:\Program Files\Point Grey Research\FlyCapture2\bin64\vs2013;C:\Program Files\Point Grey Research\FlyCapture2\bin64\vs2015;C:\Program Files\Microsoft SQL Server\Client SDK\ODBC\110\Tools\Binn\;C:\Program Files (x86)\Microsoft SQL Server\120\Tools\Binn\;C:\Program Files\Microsoft SQL Server\120\Tools\Binn\;C:\Program Files\Microsoft SQL Server\120\DTS\Binn\;C:\Program Files (x86)\Windows Kits\8.1\Windows Performance Toolkit\;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;C:\Program Files\Intel\WiFi\bin\;C:\Program Files\Common Files\Intel\WirelessCommon\;C:\Program Files (x86)\Sontheim\MT_Api;C:\Program Files (x86)\Sontheim\MT_Api\;C:\Server\PHP;C:\WINDOWS\system32\config\systemprofile\.dnx\bin;C:\Program Files\Microsoft DNX\Dnvm\;C:\Program Files (x86)\nodejs\;C:\Program Files\Git\cmd;C:\Program Files\Microsoft SQL Server\130\Tools\Binn\;C:\Program Files (x86)\Windows Kits\10\Windows Performance Toolkit\;C:\Program Files\Microsoft SQL Server\Client SDK\ODBC\170\Tools\Binn\;C:\Program Files\MySQL\MySQL Shell 8.0\bin\;C:\Users\39328\AppData\Local\Microsoft\WindowsApps;C:\Users\39328\AppData\Roaming\npm;C:\Users\39328\.dotnet\tools;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\CommonExtensions\Microsoft\CMake\CMake\bin;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\CommonExtensions\Microsoft\CMake\Ninja

[Bonnie]

@Marcus-Barnet
Ok, there is not x86 and x64 bin in the normal PATH, I'm a little confused...
But I've checked your vs2019 output.
It seems the mysql plugins have already been copied to the plugin folder.
So you should have done the job.
Check C:\Qt\5.15.0\msvc2019_64\plugins\sqldrivers, do you have qsqlmysql.dll and qsqlmysqld.dll there?
If yes, just copy libmysql.dll from "MySQL Connector C 6.1\lib" (or bin, I'm not sure) to "C:\Qt\5.15.0\msvc2019_64\bin", then it is finished.

Ah, if you still want to try the vs2015_64 one.
I think maybe you could run "set PATH=C:\Program Files (x86)\Windows Kits\8.1\bin\x64;%PATH%" after qtenv2.bat.

[Marcus Barnet]

Finally, it works! Thank you!
I just followed your advice and I copied the libmysql.dll to "C:\Qt\5.15.0\msvc2019_64\bin" after checked the presence of qsqlmysql.dll and qsqlmysqld.dll in sqldrivers.

I tried to compile my project in QtCreator and it worked with mscv2019_64 so I think it's OK for me to use this one instead of the 2015 version.

The project compiles and it is able to connect to MySQL, I only get a warning from the Qtcreator console:

:-1: warning: "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\x86_amd64\cl.exe" is used by qmake, but "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\amd64\cl.exe" is configured in the kit.
Please update your kit (Desktop Qt 5.15.0 MSVC2019 64bit) or choose a mkspec for qmake that matches your target environment better.

[Bonnie]

@Marcus-Barnet
That's a little weird, that path seems to be vs2015 compiler.
Check the Kits setting of QtCreator, make sure you select the right C/C++ compiler.
For vs2019_64 that should be 16.x.xxxxx.xx (amd64)

[Marcus Barnet]

This is my current configuration:

and I can select Visual C++ compiler16.6.30320.27 (amd64)

Should I switch to this other one?

[Bonnie]

@Marcus-Barnet said in QT5.15.0, MySQL database, msvc2015_64 and Windows 10:

and I can select Visual C++ compiler16.6.30320.27 (amd64)
Should I switch to this other one?

Yes, change both C and C++ to 16.6.30320.27 (amd64)

[Marcus Barnet]

I switched it, it compiled the first time my project and everything was OK.

I tried to compile it again and it gives me this error:

:-1: error: LNK1104: cannot open file 'release\PUMP.exe'

where PUMP.exe is my project executable.

I never had this problem before.

I also get this other warning:

yvals_core.h:462:2: error: STL1000: Unexpected compiler version, expected Clang 9.0.0 or newer.
pump.h:1:1: note: in file included from C:\Qt\Examples\Qt-5.15.0\PUMP\pump.h:1:
pump.h:4:10: note: in file included from C:\Qt\Examples\Qt-5.15.0\PUMP\pump.h:4:
QMainWindow:1:10: note: in file included from C:\Qt\5.15.0\msvc2019_64\include\QtWidgets\QMainWindow:1:
qmainwindow.h:43:10: note: in file included from C:\Qt\5.15.0\msvc2019_64\include\QtWidgets\qmainwindow.h:43:
qtwidgetsglobal.h:43:10: note: in file included from C:\Qt\5.15.0\msvc2019_64\include\QtWidgets\qtwidgetsglobal.h:43:
qtguiglobal.h:43:10: note: in file included from C:\Qt\5.15.0\msvc2019_64\include\QtGui\qtguiglobal.h:43:
qglobal.h:45:12: note: in file included from C:\Qt\5.15.0\msvc2019_64\include\QtCore\qglobal.h:45:
type_traits:9:10: note: in file included from C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.26.28801\include\type_traits:9:

pump.h is very simple:

#ifndef PUMP_H
#define PUMP_H

#include <QMainWindow>
#include <QtSql>
#include <QSqlDatabase>

QT_BEGIN_NAMESPACE
namespace Ui { class Pump; }
QT_END_NAMESPACE

class Pump : public QMainWindow
{
    Q_OBJECT

public:
    Pump(QWidget *parent = nullptr);
    ~Pump();

private slots:
    void on_pushButton_clicked();

private:
    Ui::Pump *ui;
};
#endif // PUMP_H

[Marcus Barnet]

PUMP.exe is created during the first compilation (I can run it) and then when I click on build again, it disappears and I get that error.

[Bonnie]

Do you use shadow build? Delete your build folder and try again.

[Marcus Barnet]

@Bonnie said in QT5.15.0, MySQL database, msvc2015_64 and Windows 10:

Do you use shadow build? Delete your build folder and try again.

Thank you for your support, everything works fine now!

@hskoglund: thank you to you, too, for your support!