Problème d'installation du driver QMySql

[hskoglund]

Hi, you still get the same error, most likely because of the cmake cache.
Try nuking (erasing) the build directory sqldrivers in Users/melvin_vga/Qt/6.2.3/Src/qtbase/src/plugins/ (easiest might be to download the Qt 6.2.3 source again).

[melvin_vga]

I uninstalled version 6.2.3 using the maintenance tool and I reinstalled it but it gives me the same errors after redoing the qtcmake and the build

[hskoglund]

This post is deleted!

[hskoglund]

I think I've found the answer, first, while -DCMAKE_OSX_ARCHITECTURES=arm64 works fine for building the sqllite and odbc plugins, it does not work for mysql :-(

Instead, you'll have to edit the link.txt command file manually.
So new instructions are:

1. Do the vanilla qt-cmake build command: /Users/melvin_vga/Qt/6.2.3/macos/bin/qt-cmake /Users/melvin_vga/Qt/6.2.3/Src/qtbase/src/plugins/sqldrivers -DCMAKE_INSTALL_PREFIX=/Users/melvin_vga/Qt/6.2.3/macos -DMySQL_INCLUDE_DIR="/usr/local/mysql/include" -DMySQL_LIBRARY="/usr/local/mysql/lib/libmysqlclient.dylib"

2. Go into the directory /Users/melvin_vga/Qt/6.2.3/Src/qtbase/src/plugins/sqldrivers/mysql/CMakeFiles/QMYSQLDriverPlugin.dir and look for a file called link.txt
   it should consist of one line beginning with:

/usr/bin/clang++ -g -DNDEBUG -O2 -arch x86_64 -isysroot /Applications/Xcode.app/Conten...

change x86_64 to arm64 like so:

/usr/bin/clang++ -g -DNDEBUG -O2 -arch arm64 -isysroot /Applications/Xcode.app/Conten...

then try the cmake --build . again

[melvin_vga]

I don't have a file name CMakeFiles in :

/Users/melvin_vga/Qt/6.2.3/Src/qtbase/src/plugins/sqldrivers/mysql

[hskoglund]

CMakeFiles is not a file, it's a subdirectory
Note I edited my post above, I think it suffices that you edit the link.txt file

[melvin_vga]

As you can see from the screenshot I posted above, I don't have the subdirectory named CMakeFiles in "mysql" and therefore not the link.txt in qt but it is in the build-sqldrivers after typing the command.

I still tried to make the changes in the link.txt of build-sqldrivers with arm and this gives this build which seems normal to me since I did not make any changes in the QT folder :

[hskoglund]

Nice, now cmake does not complain about linking with Homebrew's MySQL client (link.txt is ok with "... -arch arm64...")

One final step: fixing the 3 .o files so that they are built for arm64 (and not x86_64):
Go to the same directory as when you edited the link.txt file:
/Users/melvin_vga/Qt/6.2.3/Src/qtbase/src/plugins/sqldrivers/mysql/CMakeFiles/QMYSQLDriverPlugin.dir and look for a file called flags.make
It should have 11 lines (the first one says "DO NOT EDIT" we will do it anyway :-)
The last line in the file should begin with:

CXX_FLAGS = -g -DNDEBUG -O2 -arch x86_64 -isysroot /Applications/Xcode.app/Conten...

change x86_64 to arm64:

CXX_FLAGS = -g -DNDEBUG -O2 -arch arm64 -isysroot /Applications/Xcode.app/Conten...

then try the cmake --build . again

[melvin_vga]

Is this message good ?

[hskoglund]

Yes looks good, you have the plugin built for arm64.
Now you need to copy it into your Qt 6.2.3 installation.
You have done that bedore, see the post above for using the find command in Terminal to see where the .dylib is, snd then copy it into yout Qt.

[melvin_vga]

I need to install no ?

cmake --install .

[melvin_vga]

I don't have cmake install I just moved the build file into the qt file and it works perfectly! thank you very much!

[hskoglund]

Edit: Good! I made a post about copying but it was not needed :-)