Add support for Arm

[zytanic]

No description provided.

[rapiz1]

aarch64-unknown-linux-musl stands for ARM64 Linux with MUSL, which is already supported. Is it what you need?

[phyng]

@rapiz1 Maybe he needs Apple M1(arm64) version just like me, I will try to compile it by myself late.

[rapiz1]

@phyng That's not easy to set up :) Since Github Action doesn't provide M1 runner, we have to do cross build. CI uses cross to cross build and M1 is not supported for now.

[jasonlearst]

The aarch64-unknown-linux-musl does not work on my Pi Zero. I expect that the aarch64-unknown-linux-musl is compiled for ARMv7.

I am currently attempting to compile it on the Pi Zero to see if it will work.

pi@pizero:/tmp $ ./rathole 
-bash: ./rathole: cannot execute binary file: Exec format error

[rapiz1]

The aarch64-unknown-linux-musl does not work on my Pi Zero. I expect that the aarch64-unknown-linux-musl is compiled for ARMv7.

ARMv7 is actually 32bits :)

Anyway I'm glad to provide releases for more architectures.

@jasonlearst Can you checkout rustc Platform Support to pick ARM ones that you think will be very useful for you and other users? I don't know much about ARM and there are so many targets 😅

[zytanic]

I tried to run it on my raspberry PI 3 and it doesnt work

[jasonlearst]

I did some reading and found that these targets are needed to support the current Raspberry Pis

• arm-unknown-linux-gnueabihf
• arm-unknown-linux-musleabihf
• armv7-unknown-linux-gnueabihf
• armv7-unknown-linux-musleabihf

Source: https://piers.rocks/docker/containers/raspberry/pi/rust/cross/compile/compilation/2018/12/16/rust-compilation-for-raspberry-pi.html

[rapiz1]

@jasonlearst Thank you very much! I will try to include these targets

[rapiz1]

I built some binaries in a ci test repo. Can you try this out? https://github.com/yssjglg/rathole/actions/runs/1661695534 @jasonlearst @zytanic

[phyng]

@rapiz1
It can be compiled successfully on Apple M1, I have no problem 😄

➜  rathole git:(main) file target/release/rathole    
target/release/rathole: Mach-O 64-bit executable arm64

[zytanic]

Works on the raspberry pi now

[rapiz1]

Works on the raspberry pi now

Glad to hear that :)

[jasonlearst]

Thanks for the new binaries!

Using rathole-armv7-unknown-linux-musleabihf.zip on my Pi 4 and rathole-arm-unknown-linux-musleabihf.zip on my Pi Zero I am able to create a working rathole connection.

[tonyho]

@rapiz1 The size of the armv7 version is about 2MB, this is too big for embedded devices. Any plan to reduce the size in following release?

[rapiz1]

Any plan to reduce the size in following release?

Currently binaries of some platforms(including arm) are not stripped. #71 tracks the cross-platform strip effort.

But you can always strip manually, if you have the arm toolchain. See strip. This may reduce the binary by ~1MiB.

And if that's not enough, you can build rathole without some features. See the build guide. If you want certain feature combinations to be build with each release, you can give some feedback under #70

[tonyho]

Any plan to reduce the size in following release?

Currently binaries of some platforms(including arm) are not stripped. #71 tracks the cross-platform strip effort.

But you can always strip manually, if you have the arm toolchain. See strip. This may reduce the binary by ~1MiB.

And if that's not enough, you can build rathole without some features. See the build guide. If you want certain feature combinations to be build with each release, you can give some feedback under #70

It has been stripped already for the armv7 elf (rathole-armv7-unknown-linux-musleabihf.zip):

file rathole
rathole: ELF 32-bit LSB executable, ARM, EABI5 version 1 (GNU/Linux), statically linked, stripped

$ arm-linux-gnueabihf-strip -S rathole.armv7 
arm-linux-gnueabihf-strip: error: the input file 'rathole.armv7' has no sections


$ du -sh rathole
2.1M	rathole

[rapiz1]

@tonyho Oh. It has been already compressed by upx so the strip cannot find the sections that it needs to strip, while actually it can be stripped. You can checkout the strip status here to know if a binary is successfully stripped.

In this case, you need to build a binary by yourself, then run strip and upx :)

[rapiz1]

It seems like nobody requests for more ARM binaries of other different targets. Closed.

Feel free to open an issue if anyone has other questions.