I believe your answer is here.
This will compile fine in C++, but not in C.
It has to do with C language. In C language objects with static
storage duration has to be initialized with constant expressions or
with aggregate initializers containing constant expressions.
A "large" object is never a constant expression in C, even if the
object is declared as const.
Moreover, in C language the term "constant" refers to literal
constants (like 1, 'a', 0xFF and so on) and enum members.
Const-qualified objects (of any type) are not constants in C language
terminology. They cannot be used in initializers of objects with
static storage duration, regardless of their type.
Like squeamish says, const int ROWS = 1 << MESH_K; will work, but:
int test = 10;
const int ROWS = 1 << test;
Will NOT work. My guess is that MESH_K is pasted into the code as a literal, and therefore resolves to a C constant.
