macro_rules! key {
($key_name:ident) => { ... };
($key_name:ident = $json_name:expr) => { ... };
($key_name:ident, bool) => { ... };
($key_name:ident = $json_name:expr, bool) => { ... };
($key_name:ident, u64) => { ... };
($key_name:ident, u32) => { ... };
($key_name:ident, Option<u64>) => { ... };
($key_name:ident, MergeFunctions) => { ... };
($key_name:ident, RelocModel) => { ... };
($key_name:ident, CodeModel) => { ... };
($key_name:ident, TlsModel) => { ... };
($key_name:ident, PanicStrategy) => { ... };
($key_name:ident, RelroLevel) => { ... };
($key_name:ident, DebuginfoKind) => { ... };
($key_name:ident, SplitDebuginfo) => { ... };
($key_name:ident, list) => { ... };
($key_name:ident, opt_list) => { ... };
($key_name:ident, falliable_list) => { ... };
($key_name:ident, optional) => { ... };
($key_name:ident = $json_name:expr, LldFlavor) => { ... };
($key_name:ident = $json_name:expr, LinkerFlavor) => { ... };
($key_name:ident, StackProbeType) => { ... };
($key_name:ident, SanitizerSet) => { ... };
($key_name:ident = $json_name:expr, link_self_contained) => { ... };
($key_name:ident = $json_name:expr, link_objects) => { ... };
($key_name:ident = $json_name:expr, link_args) => { ... };
($key_name:ident, env) => { ... };
($key_name:ident, Option<Abi>) => { ... };
($key_name:ident, TargetFamilies) => { ... };
($key_name:ident, Conv) => { ... };
}