从Windows交叉编译Rust到ARM Linux [英] Cross-compiling Rust from Windows to ARM Linux

问题描述

我正在使用Windows10。我想交叉编译一个Rust程序，使其在 armv7-unknown-linux-gnueabihf 上运行。 （ armv7-unknown-linux-muscl 也可以接受，但似乎不可用。）

I'm using Windows 10. I would like to cross-compile a Rust program to run on armv7-unknown-linux-gnueabihf. (armv7-unknown-linux-muscl would also be acceptable but it doesn't seem to be available.)

这是我的步骤：

1. 安装 rustup


2. rustup工具链安装稳定-x86_64-pc-windows-gnu


3. rustup工具链默认稳定-x86_64-pc-windows-gnu


4. rustup目标添加armv7-unknown-linux-gnueabihf



5. 编辑我的 ./ cargo / config 文件以包含：

1. Install rustup
2. rustup toolchain install stable-x86_64-pc-windows-gnu
3. rustup toolchain default stable-x86_64-pc-windows-gnu
4. rustup target add armv7-unknown-linux-gnueabihf

5. Edit my ./cargo/config file to contain:

[build]
target = "armv7-unknown-linux-gnueabihf"

货物建造

这可以编译一切正常，但是在链接时会出现此错误：

This compiles everything fine, but when it comes to linking it gives this error:

error: could not exec the linker `cc`: The system cannot find the file specified. (os error 2)

据我所能确定，这是因为Rust不会t有其自己的链接器，而是使用GCC。显然，我需要自己提供并将其添加到 ./ cargo / config 文件中：

As far as I have been able to determine, this is because Rust doesn't have its own linker and uses GCC instead. Apparently I need to provide this myself and add this to the ./cargo/config file:

[target.armv7-unknown-linux-gnueabihf]
linker = "c:/path/to/my/gcc/cross/compiler"

是吗？如果是这样，我可以在Windows的哪里下载这样的交叉编译器，为什么 rustup 不安装它？不得不自己编译GCC的交叉编译版本是交叉编译C / C ++程序的最大痛苦。 Rustup真的不会使它变得更简单吗？

Is that right? If so where on Earth can I download such a cross-compiler for Windows and why doesn't rustup install it? Having to compile a cross-compiling version of GCC yourself is the biggest pain of cross-compiling C/C++ programs. Does Rustup really not make this any easier?

推荐答案

感谢@Notlikethat的注释：

Thanks to @Notlikethat's comment:

a）是，您需要提供自己的GCC交叉编译器。

a) Yes you need to provide your own GCC cross-compiler.

b）您可以获得一个此处（选择 mingw32

b) You can get one here (select a mingw32 build).

只需解压缩linaro的GCC，然后将货物指向它：

Just unzip linaro's GCC then point cargo to it:

[target.armv7-unknown-linux-gnueabihf]
linker = "C:/Users/me/gcc-linaro-5.3.1-2016.05-i686-mingw32_arm-linux-gnueabihf/bin/arm-linux-gnueabihf-gcc.exe"

即使它是，它似乎也能正常工作arm-而不是 armv7-。我想链接不取决于ISA。其实我还没有运行它，但是它的构建没有错误！

It seems to work even though it is arm- and not armv7-. I guess linking doesn't depend on the ISA. Actually I haven't run it yet, but it builds without errors!

编辑：

您现在可以使用 armv7-unknown-linux-musleabihf 来获取实际可移植的二进制文件（即，它不依赖于经常导致兼容性问题）。

You can now use armv7-unknown-linux-musleabihf instead and get an actually portable binary (i.e. it doesn't depend on the GNU C library which often causes compatibility issues).

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