Re: [PROPOSAL] Builder, a build system integration for Emacs

[Gregory Heytings <gregory@heytings.org>]

>
> For mandatory dependencies, the only important aspect is whether I'd 
> need to upgrade libraries I already have to newer versions, and if so, 
> whether those newer versions will cause compatibility problems with 
> programs I have installed that use those libraries.
>

This is the misconception I pointed to in my previous post: Rust libraries 
are not dynamic libraries, they are compiled into the program.  This 
eliminates all compatibility problems: you can have as many programs as 
you want on your computer, each one compiled with a different version of a 
given library.  And the point of the crates.io repository is to ensure 
that all versions of all libraries will forever be available, to ensure 
that a Rust program that depends on a specific version of a library will 
remain compilable.

>
> This is also something a typical package installation will not let me 
> control: they will just upgrade the other programs as well, whether I 
> want that or not.
>

This is a separate question, and I don't know which package manager you 
have in mind, but at least with Debian's package manager what you describe 
doesn't happen.  You can always review what will be upgraded.