Compile static gdbserver for MIPS with Nix

I’ve tested the following instructions using GDB 15.2 and NixOS 24.11.

About gdbserver

When you run GDB to debug a process, two things happen:

1. GDB starts or attaches to a process that you want to debug.
2. GDB provides you a user interface so that you can control and inspect that process.

The GDB user interface itself typically runs on your own machine. You can start or attach to processes even outside of your own machine. GDB provides a program called gdbserver for this task. gdbserver manages process execution without providing a user interface itself. GDB then attaches to gdbserver over the network using a TCP socket.

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