RealView Compilation Tools Developer Guide - ARM Information ...

Embedded Software Development
Note
The linker does not report any semihosting functions in your application code. An error
only occurs if this type of function is linked in from the C library.
For a full list of C library functions that use semihosting, see Appendix A Semihosting.
2.3.3 Example code for Build 2
Build 2 of the Dhrystone benchmark uses the hardware of the Integrator platform for
clocking and string I/O. See the example build files in the main examples directory, in
...\emb_sw_dev\build2.
The following changes have been made to Build 1 of the example project:
C Library Retargeting
A retargeted layer of ISO C functions has been added. These include
standard I/O functions and clock functionality, some additional error
signaling, and program exit.
Target Dependent Device Driver
A device driver layer has been added that interacts directly with target
hardware peripherals.
See Running the Dhrystone builds on an Integrator on page 2-3.
The symbol __use_no_semihosting is not imported into this project. This is because a
semihosting call is executed during C library initialization to set up the application stack
and heap location. Retargeting stack and heap setup is described in detail in Placing the
stack and heap on page 2-20.
Note
To see the output, a terminal or terminal emulator must be connected to serial port A.
The serial port settings must be set to 38400 baud, no parity, 1 stop bit and no flow
control. The terminal must be configured to append line feeds to incoming line ends,
and echo typed characters locally.
2-14 Copyright © 2002-2007 ARM Limited. All rights reserved. ARM DUI 0203H
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