Atmel CAVR-4 Manual De Usuario

CAVR-4

Descriptions of options

Reference Guide

Then the following directories are searched in the order listed below for the file 

config.h

, which in this example is located in the 

dir\debugconfig

 directory:

dir\include

Current file.

dir\src

File including current file.

dir\include

As specified with the first 

-I

 option.

dir\debugconfig

As specified with the second 

-I

 option.

Use angle brackets for standard header files, like 

stdio.h

, and double quotes for files 

that are part of your application.

Note: Both 

\

 and 

/

 can be used as directory delimiters.

To set the equivalent option in IAR Embedded Workbench, select 
Project>Options>C/C++ Compiler>Preprocessor.

--initializers_in_flash

--initializers_in_flash

Use this option to place aggregate initializers in flash memory. These initializers are 
otherwise placed either in the external segments 

_C

 or in the initialized data segments if 

the compiler option 

-y

 was also specified.

For example:

void foo ()

{

  char buf[4] = { '1', 'd', 'g', 't' };

  ...

}

In other words: An aggregate initializer—an array or a struct—is constant data that is 
copied to the stack dynamically at runtime, in this case every time a function is entered.

The drawback of placing data in flash memory is that it takes more time to copy it; the 
advantage is that it does not occupy memory in the data space.

Local variables with aggregate initializers are copied from the segments:

See -y, page 200, and the chapter Initialization of local aggregates at function 
invocation, page 40 for additional information.

This option is related to the Code options in the C/C++ Compiler category in IAR 
Embedded Workbench.

auto aggregates

NEAR_C

NEAR_F

NEAR_F