Added QMysql plugin to Qt Creator project on MacOS Ventura 13.4

[BushyAxis793]

@SGaist I think I did.

Copied files from

/Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/sqldrivers/build-sqldrivers/plugins/sqldrivers

to

/Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/sqldrivers

Builded debug and release

[SGaist]

As already requested, stop working in the installation tree, create the build dir completely outside of it.

Start your application with the QT_DEBUG_PLUGINS environment variable set to 1 to see what is happening with the plugins.

[BushyAxis793]

@SGaist Ok sorry. I delete build-sqldrivers from Qt directory and build one more time on my desktop. I input QT_DEBUG_PLUGINS in my code and I got this:

qt.core.plugin.factoryloader: checking directory path "/Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/platforms" ...
qt.core.plugin.factoryloader: looking at "/Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/platforms/libqoffscreen.dylib"
qt.core.plugin.loader: Found metadata in lib /Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/platforms/libqoffscreen.dylib, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "offscreen"
        ]
    },
    "archlevel": 0,
    "className": "QOffscreenIntegrationPlugin",
    "debug": false,
    "version": 394496
}


qt.core.plugin.factoryloader: Got keys from plugin meta data QList("offscreen")
qt.core.plugin.factoryloader: looking at "/Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/platforms/libqminimal.dylib"
qt.core.plugin.loader: Found metadata in lib /Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/platforms/libqminimal.dylib, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimal"
        ]
    },
    "archlevel": 0,
    "className": "QMinimalIntegrationPlugin",
    "debug": false,
    "version": 394496
}


qt.core.plugin.factoryloader: Got keys from plugin meta data QList("minimal")
qt.core.plugin.factoryloader: looking at "/Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/platforms/libqcocoa.dylib"
qt.core.plugin.loader: Found metadata in lib /Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/platforms/libqcocoa.dylib, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "cocoa"
        ]
    },
    "archlevel": 0,
    "className": "QCocoaIntegrationPlugin",
    "debug": false,
    "version": 394496
}


qt.core.plugin.factoryloader: Got keys from plugin meta data QList("cocoa")
qt.core.plugin.factoryloader: checking directory path "/Users/mikolajnawrocki/Documents/GitHub/build-ATLAS-Qt_6_5_0_for_macOS-Release/platforms" ...
qt.core.library: "/Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/platforms/libqcocoa.dylib" loaded library
qt.core.plugin.factoryloader: checking directory path "/Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/platformthemes" ...
qt.core.plugin.factoryloader: checking directory path "/Users/mikolajnawrocki/Documents/GitHub/build-ATLAS-Qt_6_5_0_for_macOS-Release/platformthemes" ...
qt.core.plugin.factoryloader: checking directory path "/Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/styles" ...
qt.core.plugin.factoryloader: looking at "/Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/styles/libqmacstyle.dylib"
qt.core.plugin.loader: Found metadata in lib /Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/styles/libqmacstyle.dylib, metadata=
{
    "IID": "org.qt-project.Qt.QStyleFactoryInterface",
    "MetaData": {
        "Keys": [
            "macOS"
        ]
    },
    "archlevel": 0,
    "className": "QMacStylePlugin",
    "debug": false,
    "version": 394496
}


qt.core.plugin.factoryloader: Got keys from plugin meta data QList("macos")
qt.core.plugin.factoryloader: checking directory path "/Users/mikolajnawrocki/Documents/GitHub/build-ATLAS-Qt_6_5_0_for_macOS-Release/styles" ...
qt.core.library: "/Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/styles/libqmacstyle.dylib" loaded library
qt.qpa.fonts: Populating font family aliases took 50 ms. Replace uses of missing font family "Roboto" with one that exists to avoid this cost. 
qt.core.plugin.factoryloader: checking directory path "/Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/networkaccess" ...
qt.core.plugin.factoryloader: checking directory path "/Users/mikolajnawrocki/Documents/GitHub/build-ATLAS-Qt_6_5_0_for_macOS-Release/networkaccess" ...
qt.core.library: "resolv" loaded library
qt.core.plugin.factoryloader: checking directory path "/Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/sqldrivers" ...
qt.core.plugin.factoryloader: looking at "/Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/sqldrivers/libqsqlite.dylib"
qt.core.plugin.loader: Found metadata in lib /Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/sqldrivers/libqsqlite.dylib, metadata=
{
    "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
    "MetaData": {
        "Keys": [
            "QSQLITE"
        ]
    },
    "archlevel": 0,
    "className": "QSQLiteDriverPlugin",
    "debug": false,
    "version": 394496
}


qt.core.plugin.factoryloader: Got keys from plugin meta data QList("QSQLITE")
qt.core.plugin.factoryloader: looking at "/Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/sqldrivers/libqsqlmysql.dylib"
qt.core.plugin.loader: Failed to find metadata in lib /Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/sqldrivers/libqsqlmysql.dylib: '/Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/sqldrivers/libqsqlmysql.dylib' is not a valid Mach-O binary (wrong architecture)
qt.core.plugin.factoryloader: "Failed to extract plugin meta data from '/Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/sqldrivers/libqsqlmysql.dylib': '/Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/sqldrivers/libqsqlmysql.dylib' is not a valid Mach-O binary (wrong architecture)" 
         not a plugin
qt.core.plugin.factoryloader: looking at "/Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/sqldrivers/libqsqlodbc.dylib"
qt.core.plugin.loader: Found metadata in lib /Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/sqldrivers/libqsqlodbc.dylib, metadata=
{
    "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
    "MetaData": {
        "Keys": [
            "QODBC"
        ]
    },
    "archlevel": 0,
    "className": "QODBCDriverPlugin",
    "debug": false,
    "version": 394496
}


qt.core.plugin.factoryloader: Got keys from plugin meta data QList("QODBC")
qt.core.plugin.factoryloader: looking at "/Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/sqldrivers/libqsqlpsql.dylib"
qt.core.plugin.loader: Found metadata in lib /Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/sqldrivers/libqsqlpsql.dylib, metadata=
{
    "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
    "MetaData": {
        "Keys": [
            "QPSQL"
        ]
    },
    "archlevel": 0,
    "className": "QPSQLDriverPlugin",
    "debug": false,
    "version": 394496
}


qt.core.plugin.factoryloader: Got keys from plugin meta data QList("QPSQL")
qt.core.plugin.factoryloader: checking directory path "/Users/mikolajnawrocki/Documents/GitHub/build-ATLAS-Qt_6_5_0_for_macOS-Release/sqldrivers" ...
QSqlDatabase: QMYSQL driver not loaded
QSqlDatabase: available drivers: QSQLITE QODBC QPSQL
qt.core.plugin.factoryloader: checking directory path "/Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/accessible" ...
qt.core.plugin.factoryloader: checking directory path "/Users/mikolajnawrocki/Documents/GitHub/build-ATLAS-Qt_6_5_0_for_macOS-Release/accessible" ...

[SGaist]

@BushyAxis793 check the file type and architecture of the plugin you created. There's something wrong with it.

[BushyAxis793]

@SGaist OK. I decided to delete and build plugin one more time and I still got no errors but I noticed few warnings:

ld: warning: dylib (/usr/local/mysql/lib/libmysqlclient.dylib) was built for newer macOS version (12.0) than being linked (11.0)
ld: warning: linking against a dylib which is not safe for use in application extensions: /usr/local/mysql/lib/libmysqlclient.dylib

The file type of my libmysqlclient.dylib seems be ok and the architecture is universal (x86 + amr64) via lipo.

[SGaist]

What about libqsqlmysql.dylib ?

[BushyAxis793]

@SGaist I checked libqsqlmysql.dylib architecture:

mikolajnawrocki@MacBook-Pro-Mikoaj ~ % lipo -info /Users/mikolajnawrocki/Desktop/build-sqldrivers/plugins/sqldrivers/libqsqlmysql.dylib
Non-fat file: /Users/mikolajnawrocki/Desktop/build-sqldrivers/plugins/sqldrivers/libqsqlmysql.dylib is architecture: x86_64

[SGaist]

Looks like it still is single architecture.

[BushyAxis793]

@SGaist As I said before libmysqlclient.dylib is universal

mikolajnawrocki@MacBook-Pro-Mikoaj ~ % lipo -info /Users/mikolajnawrocki/Desktop/universal/libmysqlclient.dylib
Architectures in the fat file: /Users/mikolajnawrocki/Desktop/universal/libmysqlclient.dylib are: x86_64 arm64 

So the question is why libqsqlmysql.dylib is still x86?

in this command

/Users/mikolajnawrocki/Qt/6.5.0/macos/bin/qt-cmake /Users/mikolajnawrocki/Qt/6.5.0/Src/qtbase/src/plugins/sqldrivers -DCMAKE_INSTALL_PREFIX=/Users/mikolajnawrocki/Qt/6.5.0/macos -DMySQL_INCLUDE_DIR="/usr/local/mysql/include" -DMySQL_LIBRARY="/usr/local/mysql/lib/libmysqlclient.dylib"

libmysqlclient.dylib has correctly architecture

Maybe something with this warnings?

ld: warning: dylib (/usr/local/mysql/lib/libmysqlclient.dylib) was built for newer macOS version (12.0) than being linked (11.0)
ld: warning: linking against a dylib which is not safe for use in application extensions: /usr/local/mysql/lib/libmysqlclient.dylib

I think I am very close to fix my problem but still needs some help.

[hskoglund]

Hi, to be sure you build for the correct architecture, you can specify it on qt-cmake's command line, like this:

/Users/mikolajnawrocki/Qt/6.5.0/macos/bin/qt-cmake /Users/mikolajnawrocki/Qt/6.5.0/Src/qtbase/src/plugins/sqldrivers -DCMAKE_INSTALL_PREFIX=/Users/mikolajnawrocki/Qt/6.5.0/macos -DMySQL_INCLUDE_DIR="/usr/local/mysql/include" -DMySQL_LIBRARY="/usr/local/mysql/lib/libmysqlclient.dylib" -DCMAKE_OSX_ARCHITECTURES="arm64" .

[BushyAxis793]

@hskoglund Thanks for reply. I was follow your tip and the architecture is:

mikolajnawrocki@MacBook-Pro-Mikoaj ~ % lipo -info /Users/mikolajnawrocki/Desktop/build-sqldrivers/plugins/sqldrivers/libqsqlmysql.dylib
Non-fat file: /Users/mikolajnawrocki/Desktop/build-sqldrivers/plugins/sqldrivers/libqsqlmysql.dylib is architecture: x86_64

[hskoglund]

Hi, if you're running QT an M1 MacBook Pro then the architecture should be "arm64".

[BushyAxis793]

@hskoglund I know but my architecture is x86_64/arm64 so I need universal plugin. No idea how to install arm only version of QT.

[hskoglund]

Building wrih universal architecture is a good idea if you plan to distribute the .dylib to other Mac computers, but Oracle only allows a build for a single compurer anyway:

[BushyAxis793]

@hskoglund OK. So, can You tell me what is in you opinion best way to add qmysql plugin to qt creator?

[hskoglund]

If you do that qt-cmake command again with the architecture specified (same as I posted 7 hours ago):

/Users/mikolajnawrocki/Qt/6.5.0/macos/bin/qt-cmake ... -DCMAKE_OSX_ARCHITECTURES="arm64"

and then try the lipo command:

lipo -info /Users/mikolajnawrocki/Desktop/build-sqldrivers/plugins/sqldrivers/libqsqlmysql.dylib

if it still says "x86_64" then try nuking the build directory :-)

[BushyAxis793]

@hskoglund Same result :(

I have no idea why I still got x86_64 architecture...

All I want is just add QMySQL plugin to my Qt Creator project nothing more.

[hskoglund]

The stackoverflow post you linked to 9 days ago, I looked at it now and it is a very good instruction how to build the MySQL plugin.
Pleas try it again and remember to erase all build directories and download a fresh copy of Qt”s sources every time you complie/build the plugin.

[BushyAxis793]

@hskoglund I did it but when I input

cmake --build .

I got:

[9/11] Linking CXX shared module plugins/sqldrivers/libqsqlmysql.dylib
FAILED: plugins/sqldrivers/libqsqlmysql.dylib 
: && /usr/bin/clang++ -g -DNDEBUG -O2 -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX13.3.sdk -mmacosx-version-min=11.0 -bundle -Wl,-headerpad_max_install_names -Wl,-undefined,error -fapplication-extension -o plugins/sqldrivers/libqsqlmysql.dylib mysql/CMakeFiles/QMYSQLDriverPlugin.dir/QMYSQLDriverPlugin_autogen/mocs_compilation.cpp.o mysql/CMakeFiles/QMYSQLDriverPlugin.dir/main.cpp.o mysql/CMakeFiles/QMYSQLDriverPlugin.dir/qsql_mysql.cpp.o -F/Users/mikolajnawrocki/Qt/6.5.0/macos/lib -Wl,-rpath,/usr/local/mysql/lib -Wl,-rpath,/Users/mikolajnawrocki/Qt/6.5.0/macos/lib  /usr/local/mysql/lib/libmysqlclient.dylib  /Users/mikolajnawrocki/Qt/6.5.0/macos/lib/QtSql.framework/Versions/A/QtSql  /Users/mikolajnawrocki/Qt/6.5.0/macos/lib/QtCore.framework/Versions/A/QtCore  -framework IOKit  -framework DiskArbitration && cd /Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/sqldrivers/build_sqldrivers/mysql && /opt/homebrew/Cellar/cmake/3.26.4/bin/cmake -E make_directory /Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/sqldrivers/build_sqldrivers/plugins/sqldrivers/libqsqlmysql.dylib.dSYM/Contents/Resources/DWARF && /opt/homebrew/Cellar/cmake/3.26.4/bin/cmake -E copy Info.dSYM.plist /Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/sqldrivers/build_sqldrivers/plugins/sqldrivers/libqsqlmysql.dylib.dSYM/Contents/Info.plist && /usr/bin/dsymutil /Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/sqldrivers/build_sqldrivers/plugins/sqldrivers/libqsqlmysql.dylib --flat -o /Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/sqldrivers/build_sqldrivers/plugins/sqldrivers/libqsqlmysql.dylib.dSYM/Contents/Resources/DWARF/qsqlmysql && /usr/bin/strip -S /Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/sqldrivers/build_sqldrivers/plugins/sqldrivers/libqsqlmysql.dylib && chmod -x /Users/mikolajnawrocki/Qt/6.5.0/macos/plugins/sqldrivers/build_sqldrivers/plugins/sqldrivers/libqsqlmysql.dylib.dSYM/Contents/Resources/DWARF/qsqlmysql
ld: warning: ignoring file /usr/local/mysql/lib/libmysqlclient.dylib, building for macOS-x86_64 but attempting to link with file built for macOS-arm64
Undefined symbols for architecture x86_64:
  "_mysql_affected_rows", referenced from:
      QMYSQLResult::reset(QString const&) in qsql_mysql.cpp.o
      QMYSQLResult::nextResult() in qsql_mysql.cpp.o
  "_mysql_character_set_name", referenced from:
      QMYSQLDriver::open(QString const&, QString const&, QString const&, QString const&, int, QString const&) (.cold.1) in qsql_mysql.cpp.o
  "_mysql_close", referenced from:
      QMYSQLDriver::open(QString const&, QString const&, QString const&, QString const&, int, QString const&) in qsql_mysql.cpp.o
      QMYSQLDriver::close() in qsql_mysql.cpp.o
  "_mysql_data_seek", referenced from:
      QMYSQLResult::fetch(int) in qsql_mysql.cpp.o
  "_mysql_errno", referenced from:
      qMakeError(QString const&, QSqlError::ErrorType, QMYSQLDriverPrivate const*) in qsql_mysql.cpp.o
      QMYSQLResult::record() const in qsql_mysql.cpp.o
  "_mysql_error", referenced from:
      qMakeError(QString const&, QSqlError::ErrorType, QMYSQLDriverPrivate const*) in qsql_mysql.cpp.o
      QMYSQLDriver::open(QString const&, QString const&, QString const&, QString const&, int, QString const&) (.cold.1) in qsql_mysql.cpp.o
  "_mysql_fetch_field", referenced from:
      QMYSQLResultPrivate::bindInValues() in qsql_mysql.cpp.o
      QMYSQLResult::record() const in qsql_mysql.cpp.o
      QMYSQLDriver::record(QString const&) const in qsql_mysql.cpp.o
  "_mysql_fetch_field_direct", referenced from:
      QMYSQLResult::reset(QString const&) in qsql_mysql.cpp.o
      QMYSQLResult::nextResult() in qsql_mysql.cpp.o
  "_mysql_fetch_lengths", referenced from:
      QMYSQLResult::data(int) in qsql_mysql.cpp.o
  "_mysql_fetch_row", referenced from:
      QMYSQLResult::fetch(int) in qsql_mysql.cpp.o
      QMYSQLResult::fetchNext() in qsql_mysql.cpp.o
  "_mysql_field_count", referenced from:
      QMYSQLResult::reset(QString const&) in qsql_mysql.cpp.o
      QMYSQLResult::nextResult() in qsql_mysql.cpp.o
  "_mysql_field_seek", referenced from:
      QMYSQLResult::record() const in qsql_mysql.cpp.o
  "_mysql_free_result", referenced from:
      QMYSQLResult::cleanup() in qsql_mysql.cpp.o
      QMYSQLResult::nextResult() in qsql_mysql.cpp.o
      QMYSQLDriver::record(QString const&) const in qsql_mysql.cpp.o
  "_mysql_init", referenced from:
      QMYSQLDriver::open(QString const&, QString const&, QString const&, QString const&, int, QString const&) in qsql_mysql.cpp.o
  "_mysql_insert_id", referenced from:
      QMYSQLResult::lastInsertId() const in qsql_mysql.cpp.o
  "_mysql_list_fields", referenced from:
      QMYSQLDriver::record(QString const&) const in qsql_mysql.cpp.o
  "_mysql_next_result", referenced from:
      QMYSQLResult::cleanup() in qsql_mysql.cpp.o
      QMYSQLResult::nextResult() in qsql_mysql.cpp.o
  "_mysql_num_fields", referenced from:
      QMYSQLResultPrivate::bindInValues() in qsql_mysql.cpp.o
  "_mysql_num_rows", referenced from:
      QMYSQLResult::fetchLast() in qsql_mysql.cpp.o
      QMYSQLResult::size() in qsql_mysql.cpp.o
  "_mysql_options", referenced from:
      setOptionString(MYSQL*, mysql_option, QStringView) in qsql_mysql.cpp.o
      setOptionInt(MYSQL*, mysql_option, QStringView) in qsql_mysql.cpp.o
      setOptionBool(MYSQL*, mysql_option, QStringView) in qsql_mysql.cpp.o
  "_mysql_query", referenced from:
      QMYSQLDriver::beginTransaction() in qsql_mysql.cpp.o
      QMYSQLDriver::commitTransaction() in qsql_mysql.cpp.o
      QMYSQLDriver::rollbackTransaction() in qsql_mysql.cpp.o
  "_mysql_real_connect", referenced from:
      QMYSQLDriver::open(QString const&, QString const&, QString const&, QString const&, int, QString const&) in qsql_mysql.cpp.o
  "_mysql_real_escape_string", referenced from:
      QMYSQLDriver::formatValue(QSqlField const&, bool) const in qsql_mysql.cpp.o
  "_mysql_real_query", referenced from:
      QMYSQLResult::reset(QString const&) in qsql_mysql.cpp.o
  "_mysql_select_db", referenced from:
      QMYSQLDriver::open(QString const&, QString const&, QString const&, QString const&, int, QString const&) in qsql_mysql.cpp.o
  "_mysql_server_end", referenced from:
      QMYSQLDriver::~QMYSQLDriver() in qsql_mysql.cpp.o
      QMYSQLDriver::~QMYSQLDriver() in qsql_mysql.cpp.o
      QMYSQLDriver::~QMYSQLDriver() in qsql_mysql.cpp.o
  "_mysql_server_init", referenced from:
      QMYSQLDriver::QMYSQLDriver(QObject*) in qsql_mysql.cpp.o
      QMYSQLDriver::QMYSQLDriver(MYSQL*, QObject*) in qsql_mysql.cpp.o
  "_mysql_set_character_set", referenced from:
      QMYSQLDriver::open(QString const&, QString const&, QString const&, QString const&, int, QString const&) in qsql_mysql.cpp.o
  "_mysql_stmt_affected_rows", referenced from:
      QMYSQLResult::exec() in qsql_mysql.cpp.o
  "_mysql_stmt_attr_set", referenced from:
      QMYSQLResult::exec() in qsql_mysql.cpp.o
  "_mysql_stmt_bind_param", referenced from:
      QMYSQLResult::exec() in qsql_mysql.cpp.o
  "_mysql_stmt_bind_result", referenced from:
      QMYSQLResult::exec() in qsql_mysql.cpp.o
  "_mysql_stmt_close", referenced from:
      QMYSQLResult::cleanup() in qsql_mysql.cpp.o
      QMYSQLDriver::open(QString const&, QString const&, QString const&, QString const&, int, QString const&) in qsql_mysql.cpp.o
  "_mysql_stmt_data_seek", referenced from:
      QMYSQLResult::fetch(int) in qsql_mysql.cpp.o
  "_mysql_stmt_errno", referenced from:
      qMakeStmtError(QString const&, QSqlError::ErrorType, MYSQL_STMT*) in qsql_mysql.cpp.o
  "_mysql_stmt_error", referenced from:
      qMakeStmtError(QString const&, QSqlError::ErrorType, MYSQL_STMT*) in qsql_mysql.cpp.o
  "_mysql_stmt_execute", referenced from:
      QMYSQLResult::exec() in qsql_mysql.cpp.o
  "_mysql_stmt_fetch", referenced from:
      QMYSQLResult::fetch(int) in qsql_mysql.cpp.o
      QMYSQLResult::fetchNext() in qsql_mysql.cpp.o
  "_mysql_stmt_free_result", referenced from:
      QMYSQLResult::detachFromResultSet() in qsql_mysql.cpp.o
  "_mysql_stmt_init", referenced from:
      QMYSQLResult::prepare(QString const&) in qsql_mysql.cpp.o
      QMYSQLDriver::open(QString const&, QString const&, QString const&, QString const&, int, QString const&) in qsql_mysql.cpp.o
  "_mysql_stmt_insert_id", referenced from:
      QMYSQLResult::lastInsertId() const in qsql_mysql.cpp.o
  "_mysql_stmt_num_rows", referenced from:
      QMYSQLResult::fetchLast() in qsql_mysql.cpp.o
      QMYSQLResult::size() in qsql_mysql.cpp.o
  "_mysql_stmt_param_count", referenced from:
      QMYSQLResult::prepare(QString const&) in qsql_mysql.cpp.o
      QMYSQLResult::exec() in qsql_mysql.cpp.o
      QMYSQLDriver::open(QString const&, QString const&, QString const&, QString const&, int, QString const&) in qsql_mysql.cpp.o
  "_mysql_stmt_prepare", referenced from:
      QMYSQLResult::prepare(QString const&) in qsql_mysql.cpp.o
      QMYSQLDriver::open(QString const&, QString const&, QString const&, QString const&, int, QString const&) in qsql_mysql.cpp.o
  "_mysql_stmt_reset", referenced from:
      QMYSQLResult::exec() in qsql_mysql.cpp.o
  "_mysql_stmt_result_metadata", referenced from:
      QMYSQLResultPrivate::bindInValues() in qsql_mysql.cpp.o
  "_mysql_stmt_store_result", referenced from:
      QMYSQLResult::exec() in qsql_mysql.cpp.o
  "_mysql_store_result", referenced from:
      QMYSQLResult::cleanup() in qsql_mysql.cpp.o
      QMYSQLResult::reset(QString const&) in qsql_mysql.cpp.o
      QMYSQLResult::nextResult() in qsql_mysql.cpp.o
  "_mysql_thread_end", referenced from:
      QMYSQLDriver::close() in qsql_mysql.cpp.o
  "_mysql_thread_init", referenced from:
      QMYSQLDriver::open(QString const&, QString const&, QString const&, QString const&, int, QString const&) in qsql_mysql.cpp.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
[10/11] Building C object sqlite/CMakeFiles/QSQLit...t/6.5.0/Src/qtbase/src/3rdparty/sqlite/sqlite3.c.o
ninja: build stopped: subcommand failed.

What now?

[hskoglund]

You got to step 7 ok in that post https://stackoverflow.com/questions/73908494/qmysql-driver-not-loaded-on-mac-os-for-mac-m1-m2-users/73908495 but in step 8 you forgot to type:
-DCMAKE_OSX_ARCHITECTURES="arm64"

Remember to erase the build folders and download a fresh copy of Qt's sources before building again :-)