Atmel CAVR-4 Manual De Usuario

CAVR-4

Part 2. Compiler reference

By default the compiler generates code for the Tiny memory model for all processor 
options except 

-v4

 and 

-v6

 where the Small memory model is the default.

Use the 

-m

 or the 

--memory_model

 option if you want to generate code for a different 

memory model. 

For example, to generate code for the Large memory model, give the command:

iccavr filename -ml

or:

iccavr filename --memory_model=large 

To read more about the available memory models, see Memory model, page 9.

These options are related to the Memory model option in the General Options 
category in IAR Embedded Workbench.

 --migration_preprocessor_

extensions

--migration_preprocessor_extensions

If you need to migrate code from an earlier IAR C or C/C++ compiler, you may want to 
use this option. With this option, the following can be used in preprocessor expressions:

●

Floating-point expressions

●

Basic type names and sizeof

●

All symbol names (including typedefs and variables).

Note: If you use this option, not only will the compiler accept code that is not standard 
conformant, but it will also reject some code that does conform to the standard.

Important! Do not depend on these extensions in newly written code, as support for 
them may be removed in future compiler versions.

--misrac

--misrac[={tag1,tag2-tag3,…|all|required}]

Use this option to enable the compiler to check for deviations from the rules described 
in the MISRA Guidelines for the Use of the C Language in Vehicle Based Software. By 
using one or more arguments with the option, you can restrict the checking to a specific 
subset of the MISRA C rules. The possible arguments are described in this table: 

--misrac

Enables checking for all MISRA C rules

--misrac=n

Enables checking for the MISRA C rule with number n

--misrac=m,n

Enables checking for the MISRA C rules with numbers m 

and n