* config/avr/avr.c (avr_option_override): Warn if asked to generate
        position independent code.
        * config/avr/avr.h: Modify LINK_SPEC to reject -shared.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@205633 138bc75d-0d04-0410-961f-82ee72b054a4