Declaration of pointer variable with qualifier "const" in C.

pointer_const.c

/* gcc 4.7.2 */

#include <stdlib.h>

void f(int** const a)
{
  a = malloc(5 * sizeof(int)); // compile error
  a[0] = malloc(sizeof(int));
  *a[0] = 100;
}

void g(int* const * a)
{
  a = malloc(5 * sizeof(int));
  a[0] = malloc(sizeof(int)); // compile error
  *a[0] = 100;
}

void h(int const ** a)
{
  a = malloc(5 * sizeof(int));
  a[0] = malloc(sizeof(int));
  *a[0] = 100; // compile error
}

void h2(const int ** a)
{
  a = malloc(5 * sizeof(int));
  a[0] = malloc(sizeof(int));
  *a[0] = 100; // compile error
}

/*
  multi qualify
*/

void f_h(int const ** const a)
{
  a = malloc(5 * sizeof(int)); // compile error
  a[0] = malloc(sizeof(int));
  *a[0] = 100; // compile error
}


/*
  using []
*/

void x(int * const a[])
{
  a = malloc(5 * sizeof(int));
  a[0] = malloc(sizeof(int)); // compile error
  *a[0] = 100;
}

void y(int const * a[])
{
  a = malloc(5 * sizeof(int));
  a[0] = malloc(sizeof(int));
  *a[0] = 100; // compile error
}

void y2(const int * a[])
{
  a = malloc(5 * sizeof(int));
  a[0] = malloc(sizeof(int));
  *a[0] = 100; // compile error
}