By writing code that adheres to the ARM Architecture Procedure Call Standard (AAPCS), you can ensure that separately compiled and assembled modules can work together. The AAPCS forms part of the Base Standard Application Binary Interface for the ARM Architecture specification.
Interworking qualifiers associated with the --apcs compiler
command-line option control interworking. Position independence
qualifiers, also associated with the --apcs compiler command-line
option, control position independence, and affect the creation of
reentrant and thread-safe code.
Note
This does not mean that you must use the same --apcs command-line
options to get your modules to work together. You must be familiar
with the AAPCS.
See also- Reference
Compiler Reference:
- Other information
PDF version