[asterisk-dev] Module to Asterisk function Compiler Issue question

[Mike Myhre]

> Your module is not included in the Asterisk main binary; it's a 
> dynamic module loaded at run time. The symbol visibility is controlled 
> by the module loader, via the flags that I mentioned above.

I think my confusion came from the assumption that the channels/*.c 
files were part of the asterisk binary and they aren't. They are modules 
themselves. For that reason, it is probably a big no-no to try to call a 
function in a loadable module (chan_sip.so) from a res module that I am 
creating. There is the possibility that the module may not be loaded and 
asterisk probably doesn't allow that anyway. Is that true? Or can I call 
a function that checks to see if that module is present and still be 
able to call a function as long as in the load_module function, I use a 
function like ast_custom_function_register that points to a structure 
defining the function (dial plan functions)?

I now see why my functions were not visible to my res module and I think 
the whole picture is starting to come to light.

     Mike