The reasons why 64-bit programs require more stack memory(viva64.com)

  g++ stackuse_simple.cpp -o stackuse64
  g++ -m32 stackuse_simple.cpp -o stackuse32
  ---------------------------------------------------------
  //stackuse_simple.cpp
  #include <iostream>
  using namespace std;
  
  void StackUse(size_t *depth)
  {
    volatile size_t *ptr = 0;
    if (depth != NULL)
      ptr = depth;
    cout << *ptr << endl;
    (*ptr)++;
    StackUse(depth);
    (*ptr)--;
  }
  
  int main() {
      size_t d = 0;
      StackUse(&d);
  }