Homebrew-emacs-plus: Pending: `librsvg` option does not work for Apple Silicon (M1) due to Rust dependency

[dive]

Note: It is not really an issue. I am creating it to track the progress about the current state of Emacs Plus package on the latest Apple Silicon (M1) devices.

Homebrew state

Homebrew does not fully support Apple Silicon at the moment. They recommend using Rosetta 2 as a workaround.

• macOS 11 Big Sur compatibility on Apple Silicon #7857
• Homebrew installation on ARM MacBook with macOS 11.0

If you are brave enough, you can try arm64 Homebrew installation. To make it happen, you have to install Homebrew manually with something like this:

sudo rm -Rf /opt/homebrew || true
sudo mkdir -p /opt/homebrew
sudo chown -R $(whoami):staff /opt/homebrew
cd /opt
curl -L https://github.com/Homebrew/brew/tarball/master | tar xz --strip 1 -C homebrew

brew cleanup
brew update

Do not forget to add the /opt/homebrew/bin to your $PATH.

Emacs Plus state

I am using the following options to install, and I did not try the stable version yet.

brew install emacs-plus@28 --with-no-titlebar --without-imagemagick

Dependencies

Note: This is the current state of Homebrew bottles for arm64. Also, you can check this issue - The first ARM (Apple Silicon) bottles are here, help us test them #9488.

| State | Name | Version | Comments |
|:-----:|:-------|:--------|:-----------|
| ✅ | autoconf | 2.69 | Bottle |
| ✅ | gnu-sed | 4.8 | Source |
| ✅ | pkg-config | 0.29.2_3 | Bottle |
| ✅ | texinfo | 6.7 | Source |
| ✅ | gnutls | 3.6.15 | Source |
| 🛑 | librsvg | 2.50.2 | Source, Failed due to Rust dependency |
| ✅ | little-cms2 | 2-2.11 | Bottle |
| ✅ | jansson | 2.13.1 | Source |
| ✅ | imagemagick (recommended) | 7.0.10-48 | Source |
| ✅ | dbus (optional) | 1.12.20 | Source |
| ✅ | mailutils (optional) | 3.10 | Source |
| ✅ | freetype (x11) | 2.10.4 | Source |
| ✅ | fontconfig (x11) | 2.13.1 | Source |

So far, only Rust does not work. There is already a version with proper support of Apple Silicon (at Tier 2), perhaps, Rust team will release it in a few fix. After that, Emacs Plus has to compile on Apple Silicon as well.

[d12frosted]

Wow, nice! Thank you very much! 💯

Related #282

[hagmonk]

I got it going. It's 1.5x faster on an MacBook Air M1 than a top of the line Intel using the simple benchmark I found: https://twitter.com/hagmonk/status/1338955562084495360.

The trick so far was to install rust at --HEAD while also editing the recipe to ensure ninja is one of the build time dependencies. Everything proceeded smoothly after that.

[qazwsxpawel]

Nice! Thanks for this! @hagmonk do you have some pointers about how one would go about doing that for the Homebrew-formulae-editing-un-initiated?
Cheers!

[dive]

As a possible future-proof solution, emacs-mac formula, for example, does not use rsvg by default and provides an option to turn it on via --with-rsvg flag. That's why it is possible to compile the emacs-mac without any problems on Apple Silicon at the moment. Perhaps, we can do the same for emacs-plus.

[d12frosted]

We can allow to opt out from rsvg if that helps. Initially it was opt out, but since there were zero reasons for that, I decided to reduce the amount of indirections in the formula. WDYT?

[dive]

We can allow to opt out from rsvg if that helps. Initially it was opt out, but since there were zero reasons for that, I decided to reduce the amount of indirections in the formula. WDYT?

It is a fair point about simplicity and cost of support. If you think that the formula has to be as simple as possible, then I tend to believe you. You are maintaining it for a long time and in an excellent shape.

No rush with Apple Silicon support, there are plenty of options to make Emacs (including emacs-plus) work on M1. Enthusiasts can always play with it, but there are no benefits for all other users from the opt-out rsvg option, only the risk of unintended problems and side-effects.

[arjansingh]

I got it going. It's 1.5x faster on an MacBook Air M1 than a top of the line Intel using the simple benchmark I found: https://twitter.com/hagmonk/status/1338955562084495360.

The trick so far was to install rust at --HEAD while also editing the recipe to ensure ninja is one of the build time dependencies. Everything proceeded smoothly after that.

Could you post a diff @hagmonk (or a PR). I'd like to try this out.

[d12frosted]

@dive well, since there is an issue for some of the users, I'd rather provide help :) So now you can install emacs-plus@28 without librsvg:

$ brew install emacs-plus@28 --without-librsvg

Please let me know if that works for you.

[dive]

@d12frosted, thank you! I can confirm that it works as expected. The Emacs was installed with the following command:

brew install emacs-plus@28 --with-no-titlebar --without-imagemagick --without-librsvg

The binary information:

~/P/d/dotfiles $ file /opt/homebrew/opt/emacs-plus@28/Emacs.app/Contents/MacOS/Emacs
/opt/homebrew/opt/emacs-plus@28/Emacs.app/Contents/MacOS/Emacs: Mach-O 64-bit executable arm64

Emacs version:

GNU Emacs 28.0.50 (build 1, aarch64-apple-darwin20.2.0, NS appkit-2022.20 Version 11.1 (Build 20C69)) of 2020-12-22

[d12frosted]

@dive happy to hear! thanks for testing it 💯

[hjiang]

Rust and librsvg have been fixed for m1 in Homebrew as of now.

[d12frosted]

So that was the last bit, right? I reverted my commit allowing to opt-out since it should work now with librsvg.