topic Using Not used variables in Classic/Legacy CodeWarrior

Using Not used variables

BAN — Wed, 22 Oct 2008 21:11:08 GMT

Hi!

I'm using a lot of constant variables in a table and the code is written in a way that the linker cannot see that they are used and hence they will not be linked into the application. To avoid this I'm forced to do a dummy read for each variable.

Is there a way to tell the linker that the variables inside this segment must be linked even if they seem to be unused??

//Bengt

Re: Using Not used variables

Lundin — Thu, 29 Oct 2020 09:51:33 GMT

In the .prm file, add each variable name below "ENTRIES":

ENTRIES
  x
END

/* C file */

#pragma CONST_SEG MY_CONST_DATA

int x my_table[N] = {...};

#pragma CONST_SEG DEFAULT

Re: Using Not used variables

stanish — Wed, 22 Oct 2008 22:07:59 GMT

Hi BAN,

This depends on CodeWarrior you are using. Could you specify which CodeWarrior you mean?

e.g. 8/16 bits CW: in linker parameter file (.prm) you can use:

ENTRIES   /* switch off smart linking to get unreferenced vector table */
vectab
END

in other CW e.g. CW for MPC55xx you can use FORCEACTIVE keyword in the linker command file .lcf:

FORCEACTIVE { symbol1 symbol2 ... }

For more information I'd suggest you to see appropriate Build tools manual

Stanish