fnmain(){// Emit cfg flags for SIMD detection at build time
println!("cargo:rerun-if-changed=build.rs");#[cfg(target_arch ="x86_64")]{ifstd::env::var("CARGO_CFG_TARGET_FEATURE").is_ok_and(|f|f.contains("avx2")){println!("cargo:rustc-cfg=has_avx2");}ifstd::env::var("CARGO_CFG_TARGET_FEATURE").is_ok_and(|f|f.contains("avx512f")){println!("cargo:rustc-cfg=has_avx512");}}}