How to solve the shared error problem in swig for ld -shared command ?

[swasthi]

when i tried the following commands:
swig -python example.i
gcc -c example.c example_wrap.c -I/usr/include/python2.3
ld -shared example.o example_wrap.o -o _example.so
i get:
relocation R_X86_64_32 against `a local symbol' can not be used when making a shared object; recompile with -fPIC.
how to resolve this