Interworking

(Project Properties window)

*.prj\ASSEMBLE\Assembly\
APCS\Interworking

Select enabled if you are writing ARM code that you want to interwork with Thumb code, or Thumb code that you want to work with ARM code. The linker generates suitable interworking veneers when the assembler output is linked.

The default setting assumes that there is no interworking.

default
enabled
disabled

See –-apcs in the documentation for your toolchain.