HI fmabrouk,
Whether the SDK code has these issues or not?
Do you try to clean the project, and build it again, whether the issue is resolved or not?
Are you sure, your old .ldt works?
As I know, the MCUXPresso IDE should use the .ld, not the ldt as linker files.
You can check the SDK code, all are using .ld.
Best Regards,
Kerry