I would like to build some code which calls some code on loadup of the shared library. I thought i would do it like this:

#pragma init(my_init)

static void my_init () {
//do-something } int add (int a,int b) {
return a+b; }

So when i build that code with

gcc -fPIC -g -c -Wall tt.c

It returns

 gcc -fPIC -g -c -Wall tt.c 
tt.c:2: warning: ignoring #pragma init 
tt.c:4: warning: ‘my_init’ defined but not used

So its warning my #pragmas. I tried this in real code and my code aborted because a function hadn't been called in the pragma section because it was ignored.

How do i get gcc to use these #pragma init and fini statemets?