macOS Strange Error

[Senor Cuete]

I have a project with this C code:

const unsigned long ARRAY_SIZE = 1000000;

unsigned long array[ARRAY_SIZE];

XCode posts a strange warning:

Variable length array folded to constant array as an extension

There is no warning if I remove the const declaration from the ARRAY_SIZE declaration.

What does this mean?

 

[darkblu]

It means the compiler realized ARRAY_SIZE is a compile-time constant (which is clearly what you mean) vis-a-vis a runtime constant.

Did you per-chance get this code from c++ (where the constant is both compile- and runtime)?

if the warning bothers you you can use a

#define ARRAY_SIZE 1000000

which leaves the c compiler no room for interpretation.