Strange GDB behavior on macOS

Question

I am trying to get gdb to work on macOS. I followed the instructions here, and now no longer receive an error regarding the Code Signature.

However, when I try to use gdb, I consistently observe the following behavior.

1. I compile a hello.cpp file with g++ -g -o hello hello.cpp
2. I run gdb in the directory where I compiled the file.
3. I enter file hello into the (gdb) prompt.
4. I enter break main.
5. I enter run.

GDB now prints out

Starting program: (CWD)/hello
[New Thread 0xXXXXX of process DDDDD]

where

(CWD) is the current working directory (where the executable lives)

XXXXX is some hexadecimal number and

DDDDD is another number.

From here on, all I seem to be able to do is kill the terminal tab. Neither Ctrl-C, Ctrl-D nor anything else I enter seems to have any effect.

Some Details:

• I installed gdb using home-brew, the installed version is 8.2.1
• I did echo set startup-with-shell off >> ~/.gdbinit
• The same happens when using the built-in Terminal or iTerm2
• lldb works on the same executable

hello.cpp

#include <iostream>

int main()
{
    std::cout << "hello, world" << std::endl;

    return 0;
}