[Help-gsl] symbol lookup error, using non-defaul installation path

[Altro]

Hi,
I installed the gsl v 1.15 in my home.
As the documentation suggests, I compile the program using

gcc -Wall codice.c -L/home/altro/gsl/lib -I/home/altro/gsl/include -lgsl 
-lgslcblas -lm -o c.out

I don't receive any warning o error, but when  I launch the executable, 
I receive:

./c.out: symbol lookup error: ./c.out: undefined symbol: 
gsl_ovediv2_step_rk4

Do you know the solution to this problem?
Please help me.

Regards,

A.