Merge 88e473433b into 9b0a0a3fbb

Add a note that only `bootloader v0.9` is compatible

blog/content/edition-2/posts/02-minimal-rust-kernel/index.md

@@ -406,6 +406,8 @@ Instead of writing our own bootloader, which is a project on its own, we use the
 bootloader = "0.9"
 ```
 
+**Note:** This post is only compatible with `bootloader v0.9`. Newer versions use a different build system and will result in build errors when following this post.
+
 Adding the bootloader as a dependency is not enough to actually create a bootable disk image. The problem is that we need to link our kernel with the bootloader after compilation, but cargo has no support for [post-build scripts].
 
 [post-build scripts]: https://github.com/rust-lang/cargo/issues/545

blog/content/edition-2/posts/02-minimal-rust-kernel/index.zh-CN.md

@@ -368,6 +368,8 @@ pub extern "C" fn _start() -> ! {
 bootloader = "0.9"
 ```
 
+** 注意：** 当前环境仅兼容 `bootloader v0.9` 版本。较新的版本需考虑使用其他的构建工具，否则会导致构建出现未知错误。
+
 只添加引导程序为依赖项，并不足以创建一个可引导的磁盘映像；我们还需要内核编译完成之后，将内核和引导程序组合在一起。然而，截至目前，原生的 cargo 并不支持在编译完成后添加其它步骤（详见[这个 issue](https://github.com/rust-lang/cargo/issues/545)）。
 
 为了解决这个问题，我们建议使用 `bootimage` 工具——它将会在内核编译完毕后，将它和引导程序组合在一起，最终创建一个能够引导的磁盘映像。我们可以使用下面的命令来安装这款工具：