Help me!!! Pleass

PGHOME/src/tutorial/funcs.c .....

I compiled it by GCC ,but not excutable

command: gcc -fPIC -c funcs.c
ld -G -Bdynamic -o funcs.so funcs.o

I met errer mesage ==> " stat failed on file /../../../*.so"
++++++++
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QUERY: CREATE FUNCTION c_overpaid(EMP, int4) RETURNS bool
AS '/user1/grad/whtak/postgres/src/funcs.so' LANGUAGE 'c';

*******************************************************************************

press return to continue ..

CREATE

*******************************************************************************

QUERY: SELECT add_one(3) AS four;

*******************************************************************************

press return to continue ..

ERROR: stat failed on file /user1/grad/whtak/postgres/src/funcs.so

++++++

Let me know what means errer message.

Good Luck!!
.