Help with ccall to a clib function

[yuyichao]

@sdanisch

ptr = Base.unsafe_convert(Ptr{cc_t}, array ) # unsafe! make sure to keep a reference to array alive

Basically don’t call unsafe_convert manually like this. The code here is allowed to crash.

Also this appears to be duplicated at Help with ccall to clib functions Note that this is not the correct way to declare inline array member (and note that C arrays are NOT pointer).