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

[Shilin Yu]

   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