Anyone Know how to solve this??

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~$ sdcc -mpic16 -p18f442 led.c
Processor: 18f442
warning: processor mismatch in "/usr/bin/../share/sdcc/lib/pic16/crt0i.o"
message: using default linker script "/usr/share/gputils/lkr/18f442.lkr"
error: missing definition for symbol "_stack_end", required by "/usr/bin/../share/sdcc/lib/pic16/crt0i.o"

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Maybe I did forget any compile opts??

Thank you again,
Manuel.