Specifications

CAVR-4
184
Descriptions of options
AVR® IAR C/C++ Compiler
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.
Data Default -y --initializers_in_flash
auto aggregates NEAR_C NEAR_F NEAR_F
Table 46: Accessing variables with aggregate initializers