Mysql Driver : Cannot write file /mkspecs/modules-inst/qt_plugin_qsqlmysql.pri

Hello,

I try to compile the driver mysql but I've a problem with where QT wants to write some files.

I'm working on : QT 5.9 under macOS

The steps I did :

- Download mysql connector and unpack it,
- Open with Qt Creator the project /Users/utilisateur/Qt/5.9/Src/qtbase/src/plugins/sqldrivers/mysql/mysql.pro
- Edit the file mysql.pro to add these lines :

INCLUDEPATH+=/Users/utilisateur/mysql-connector-c-6.1.10-macos10.12-x86_64/include
LIBS+=-L/Users/utilisateur/mysql-connector-c-6.1.10-macos10.12-x86_64/lib -lmysqlclient

Compile the project

Results :

Info: creating stash file /Users/utilisateur/Qt/5.9/Src/qtbase/src/plugins/sqldrivers/.qmake.stash
Cannot read /qtsqldrivers-config.pri: No such file or directory
/Users/utilisateur/Qt/5.9/clang_64/mkspecs/features/qt_plugin.prf:59: Cannot write file /mkspecs/modules-inst/qt_plugin_qsqlmysql.pri: Cannot create parent directory

It tries to create a file /mkspecs/modules-inst/qt_plugin_qsqlmysql.pri but it cannot because it can't create anything in the directory "/".

I think something is missing in the configuration like a variable to set a good folder.

Does anyone have an idea ?

Thank you for your help and enjoy your day !