MSRV 1.77.0 TODO

[Alan Somers]

Whenever we raise the MSRV to 1.77.0 for any reason, we should
[ ] Replace the memoffset::offset_of! macro with the builtin macro of the same name (https://blog.rust-lang.org/2024/03/21/Rust-1.77.0.html#offset_of)

[SteveLauC]

• for the following code snippet in build.rs, use cargo:: rather than cargo: in build.rs (new syntax introduced in 1.77)

    // Below are Nix's custom cfg values that we need to let the compiler know
    println!("cargo:rustc-check-cfg=cfg(apple_targets)");
    println!("cargo:rustc-check-cfg=cfg(bsd)");
    println!("cargo:rustc-check-cfg=cfg(bsd_without_apple)");
    println!("cargo:rustc-check-cfg=cfg(linux_android)");
    println!("cargo:rustc-check-cfg=cfg(freebsdlike)");
    println!("cargo:rustc-check-cfg=cfg(netbsdlike)");
    println!("cargo:rustc-check-cfg=cfg(solarish)");
    println!("cargo:rustc-check-cfg=cfg(fbsd14)");
    println!("cargo:rustc-check-cfg=cfg(qemu)");