c warning: use of const variable in a constant expression is non-standard in C

Question

I\'m getting this warning when trying to initialize an array to a constant size.

#2170-D use of a const variable in a constant expression is nonstandard in C

Answer 1

A const object is not a constant in C but a read-only object. An array declared at file scope (or any array with static storage duration) has to have a constant expression as its number of elements.

This is valid:

#define MAXERRORS 4
LEDSeq errors[MAXERRORS];