[avr-gcc-list] Re: Allocation of large globals in external RAM

[Ludovic COURTES]

Hi !
 
> How can I tell the linker that I have 32K external RAM?
> How can I tell the linker where to put the stack (--defsym __stack=0x08000 
> returns 'No such file or directory').
> 
> Does anybody have working makefiles for early MCUCR, stack initialization?

'--defsym' is the option to tell avr-ld to redefine a symbol location. But when
compiling with avr-gcc, there is a special option to make it pass arguments to
avr-ld which is '-Xlinker'. Therefore, you could try :
        avr-gcc $(CFLAGS) -Xlinker --defsym -Xlinker __stack=0x8000 -c foo.c -o 
foo.o .
Note that ld's option have to be cut into to parts ('-Xlinker "--defsym 
__stack=0x8000"'
won't work).

Ludovic.

--
Ludovic Courtes
  University of Technology of Belfort-Montbeliard
  Unitec (UTBM's students Robotics Club)