@mfalkvidd Ahhhh, that was it. I was still on 2.3.0 of the esp8266 core. Once I upgraded to 2.4.2 it compiled fine and was able to find gdb_hooks.h. I think I was on the older version due to some compatibility issues I had when I was making a WiFi Jammer for a buddy of mine some time ago. Hey thanks for your help @mfalkvidd . You are the man!