Today I was trying to update FireFox on my Gentoo box and failed with error:
0:06.75 checking rustc version... 1.30.1
0:06.75 ERROR: Cargo package manager not found.
0:06.75 To compile Rust language sources, you must have 'cargo' in your path.
0:06.75 See https://www.rust-lang.org/ for more information.
0:06.75
0:06.75 You can install cargo by running './mach bootstrap'
0:06.75 or by directly running the installer from https://rustup.rs/
0:06.75
0:06.79 *** Fix above errors and then restart with\
0:06.79 "/usr/bin/gmake -f client.mk build"
0:06.79 gmake: *** [client.mk:127: configure] Error 1
I have already installed virtual/cargo and dev-lang/rust. Also I found where cargo was already installed:
equery f dev-lang/rust|grep cargo
/usr/bin/cargo-1.30.1
So the solution was simple:
sudo eselect rust update
This creates link required for build:
ls -l $(which cargo)
lrwxrwxrwx 1 root root 21 Nov 21 08:03 /usr/bin/cargo -> /usr/bin/cargo-1.30.1