Defined in rt_sys.h, this is the library
exit function. All exits from the library eventually call _sys_exit().
SyntaxThis function must not return. You can intercept application exit at a higher level by either:
Implementing the C library function
exit()as part of your application. You loseatexit()processing and library shutdown if you do this.Implementing the function
__rt_exit(int n)as part of your application. You lose library shutdown if you do this, butatexit()processing is still performed whenexit()is called ormain()returns.
The return code is advisory. An implementation might attempt to pass it to the execution environment.
- Reference
Using ARM® C and C++ Libraries and Floating-Point Support:
PDF version