Re: [sdcc-devel] compiling crt0.s for z80

[Philipp K. K. <pk...@sp...>]

On 01.03.2015 13:44, José Bray wrote:
> Hello,
> 
> I'm developping for a z80 system with sdcc.
> My system needs some modifications on the crt file, namely,  a vectorized maskable interrupt, and a retn at the 66 
> address point.
> This, I can do...
> But, when I try to compile the file with
> 
> sdasz80 -l -o -s crt0.rel crt0.asm <- the modified one
> 
> I get errors about the undefined symbols
> l_INITIALIZER,
> s_INITIALIZED,
> s_INITIALIZER
> 
> I guess these are defined by sdcc itself, but I can't figure out how to make the assembler aware of their definition.
> 
> Any help would be welcome about this point.
> 
> Thanks,
> 
> J.Bray

These symbols are defined by the linker: The l__X symbols are the length
of the corresponding area X, while the s__X symbols are the start of the
correspondign area X.
The quick and dirty way is to just assemble this file with the -g
option. I guess using .globl directives should work and would be a
better way.

Philipp