rust 在 x86_64 机器上编译 x86 库

Question

我有 ubuntu x86_64 个容器并且 cargo build 运行良好。但我也需要构建 x86 库版本。据我了解，我需要添加 i686 工具链和目标。

rustup target add i686-unknown-linux-gnu done successful

rustup toolchain install stable-i686-unknown-linux-gnu finished with error

$ rustup toolchain install stable-i686-unknown-linux-gnu
info: syncing channel updates for 'stable-i686-unknown-linux-gnu'
info: latest update on 2018-11-08, rust version 1.30.1 (1433507eb 2018-11-07)
info: downloading component 'rustc'
info: downloading component 'rust-std'
info: downloading component 'cargo'
info: downloading component 'rust-docs'
info: installing component 'rustc'
info: installing component 'rust-std'
info: installing component 'cargo'
info: installing component 'rust-docs'

  stable-i686-unknown-linux-gnu installed - (error reading rustc version)

和

$ rustup  default stable-i686
info: using existing install for 'stable-i686-unknown-linux-gnu'
info: default toolchain set to 'stable-i686-unknown-linux-gnu'

  stable-i686-unknown-linux-gnu unchanged - (error reading rustc version)

我是否遗漏了什么或采取了错误的方法？

Answer 1

无需更改工具链，您必须将目标添加到当前工具链（确保先切换回原始工具链）。

$ rustup target install i686-unknown-linux-gnu
$ cargo build --target=i686-unknown-linux-gnu

当然，您还需要在您的系统上安装 32 位库，例如在 ubuntu 上，您通过

安装它们

$ sudo apt install gcc-multilib

（有关详细信息，请参阅 How to Compile 32-bit Apps on 64-bit Ubuntu?）

rust 在 x86_64 机器上编译 x86 库

rust compile x86 library on x86_64 machine

cross-compiling

rust

rust-cargo