Hello, I was looking over the internet and am a bit confused about the mitigations that are provided by the gcc compiler for different variants of Spectre attack. So, I was wondering if there are any mitigations implemented for Specter v1 (Spectre-PHT), v2 (Spectre-BTB), v4 (Spectre-STL) and v5 (Spectre-RSB) at the compiler level for gcc? Looking forward to hearing from you. Warm regards, Amir