Re: [avr-gcc-list] Link Eorror in Combining C and assembly source files

[Dean Ferreyra]

Try using _sched_mode in your assembly code instead.  If I remember
correctly, the C compiler automatically prefixes symbols with an
underscore.

Dean

Shilin Yu wrote:
>    I met an link error when build a project with .c and .S files
> 
>    the c file  like this:
>          ...
>          volatile unsigned char     sched_mode;
>          ...
> 
> 
>    the assembly  file like this:
>          .extern    sched_mode
>          ...
>          LDS R18, sched_mode
>          ...
> 
> 
>    when I build the project. the link error about the assembly file output:
> 
>     (.text+0x32): undefined reference to `sched_mode'
> 
> 
>     Any reply is welcome! Thanks!
> 
> -- 
> Sincerely yours,
> Shilin Yu
>