{"ast_node_type":"variable","tokens":[{"end":61,"kind":"keyword","start":0,"text":"if"}]}
        if let Some(cg_rustflags) = env.get("CG_RUSTFLAGS") {
        // only sent to rustc_codegen_gcc and not the LLVM backend.
            rustflags.extend_from_slice(&split_args(cg_rustflags)?);