Should core.stdc.signal.signal be nothrow @nogc??

[Bottled Genie via Digitalmars-d]

Hello All

I am trying to make use of function signal from module 
core.stdc.signal.

The function needs a function pointer as an argument and since 
signal has been marked with attributes @nogc and nothrow, the 
function I pass to it as an argument also has to be nothrow and 
@nogc. Are these attributes intended on signal? If yes, how does 
it help.

Why should C functions in core.stdc be marked nothrow and @nogc? 
And how do I overcome the restriction imposed on function pointer 
that I want to pass to signal? In my case the function I want to 
pass as argument to signal is actually not @nogc nothrow. What 
should I do?

Regards
- Genie