ISO C90 forbids variable length array

Question

I\'m dynamically calculating the size of an array. Something like:

void foo(size_t limit)
{
  char buffer[limit * 14 + 1];
}

But just GCC c

Answer 1

A const qualified variable is not an integer constant expression in the sense of the standard. This has to be a literal constant, an enumeration constant, sizeof or some expression composed with these.

Switch to C99 if you may. The gcc option is -std=c99 (or gnu99 if you want gnu extension.)