Не получается присоединиться к рабочему процессу в gdb

вот код:

#include <iostream>
#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>


int main()
{

        int i{};
        std::cout<<"pid = "<<getpid()<<std::endl;
        while(1)
        {
                sleep(1);
                std::cout<<i<<std::endl;
        }

        return 0;
}

компилирую вот так: g++ -Wall -g3 -O0 main2.cpp -o qq Запускаю программу и пытаюсь присоединиться к работающей программе через gdb с помощью строки gdb -p 9073. Вот что выдаёт:

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Attaching to process 9241
Reading symbols from /home/ivan/first/qq...
Reading symbols from /lib/x86_64-linux-gnu/libstdc++.so.6...
(No debugging symbols found in /lib/x86_64-linux-gnu/libstdc++.so.6)
Reading symbols from /lib/x86_64-linux-gnu/libc.so.6...
Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/libc-2.31.so...
Reading symbols from /lib/x86_64-linux-gnu/libm.so.6...
Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/libm-2.31.so...
Reading symbols from /lib64/ld-linux-x86-64.so.2...
(No debugging symbols found in /lib64/ld-linux-x86-64.so.2)
Reading symbols from /lib/x86_64-linux-gnu/libgcc_s.so.1...
(No debugging symbols found in /lib/x86_64-linux-gnu/libgcc_s.so.1)
0x00007f29f9c8d334 in __GI___clock_nanosleep (clock_id=<optimized out>, clock_id@entry=0, flags=flags@entry=0, req=req@entry=0x7ffd35a33510, rem=rem@entry=0x7ffd35a33510)
    at ../sysdeps/unix/sysv/linux/clock_nanosleep.c:78
78  ../sysdeps/unix/sysv/linux/clock_nanosleep.c: No such file or directory.
(gdb) 

если пытаюсь присоединиться с помощью gdb /путь/к/файлу 9073 или (gdb) attach 9073, то показывает то же самое