Building from source fails: no associated item named `EPSILON` found for type `f64` in the current scope about eruption HOT 8 CLOSED

Hi, thanks for opening this issue!

This looks like an outdated version of Rust. Please try to upgrade at least to the latest stable release. If this is not possible for you, then you may still compile Eruption by applying a few tweaks to the build system.

Could you please provide the following information:

• What distro and which version of it are you using?
• Which version of rust are you using?

$ rustc --version

from eruption.

In case you are using Linux from Scratch, there exists a compatibility branch of Eruption in the branch lfs-compat, that should compile under LFS >= 9.1 using the old stable version of Rust.

$ cargo +stable-2020-03-12-x86_64-unknown-linux-gnu build

This successfully compiles the lfs-compat branch on my system.

from eruption.

I'm using Debian 10
And rustc --version outputs:

rustc 1.41.1

from eruption.

In case you are using Linux from Scratch, there exists a compatibility branch of Eruption in the branch lfs-compat, that should compile under LFS >= 9.1 using the old stable version of Rust.

$ cargo +stable-2020-03-12-x86_64-unknown-linux-gnu build

This successfully compiles the lfs-compat branch on my system.

I switched to that branch, but running cargo +stable-2020-03-12-x86_64-unknown-linux-gnu build just fails with

error: no such subcommand: `+stable-2020-03-12-x86_64-unknown-linux-gnu`

from eruption.

And running cargo build in the lfs-compat branch gives another error...

from eruption.

The version of Rust in Debian 10 is really old. Is it possible for you to install stable Rust via rustup? This is the recommended way to build Eruption.

https://www.rust-lang.org/tools/install

$ cargo +stable --version
cargo 1.47.0 (f3c7e066a 2020-08-28)

from eruption.

You do not have to build from source, btw. You can manually download the package from the Ubuntu bionic PPA.

https://launchpad.net/~x3n0m0rph59/+archive/ubuntu/eruption-roccat-vulcan/+files/eruption-roccat-vulcan-git_0.1.17-ubuntu4_amd64.deb

from eruption.

Thanks, its working now. Downloaded the deb

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