Как указать размер стэка в мб для программы на qt?

set(CMAKE_BUILD_TYPE DEBUG)
set(CMAKE_C_FLAGS "-Wl,--stack,4194304")
set(CMAKE_C_FLAGS_DEBUG "-Wl,--stack,4194304")
set(CMAKE_C_FLAGS_RELEASE "-Wl,--stack,4194304")
set(CMAKE_CXX_FLAGS "-Wl,--stack,4194304")
set(CMAKE_CXX_FLAGS_DEBUG "-Wl,--stack,4194304")
set(CMAKE_CXX_FLAGS_RELEASE "-Wl,--stack,4194304")

#include <sys/resource.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
 
.............
#define NUMBER_OF_BYTES 10000000 // about 10 megs
struct rlimit lim;
.............
 
    lim.rlim_cur = 10000000;
    lim.rlim_max = 10000000;
    setrlimit(NUMBER_OF_BYTES,&lim);

#include <QCoreApplication>
#include <iostream>
 
//void StackDepth(char *i, char j) // result is 1024k
//void StackDepth(int *i, int j) // result is 256k
void StackDepth(unsigned long long *i, unsigned long long j) // result is 128k
{
    std::cout << i << " - " << &j << " = " << i - &j << std::endl;
    StackDepth(i, j);
}
 
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
 
    //char i;
    //char j=0;
    //int i;
    //int j=0;
    unsigned long long i;
    unsigned long long j=0;
    StackDepth(&i, j);
 
    return a.exec();
}