PSA: target pragmas won't work on the new g++-13 compiler on CF
A PSA about GCC 13 on Codeforces rejecting target pragmas, why the issue appears, and what changed in later GCC versions.
compilers
On using C on Codeforces (and some compiler update requests)
A discussion of using C on Codeforces.
GCC Optimization Pragmas
An explanation of GCC optimization and target pragmas, what common fake pragmas do not do, and when these flags help or hurt.