Need 'cargo' since commit d0609349e86997aedc1797876d3ae26fd2fcd873

[Rtoax]

$ cd bcc/libbpf-tools
$ make
/bin/sh: line 1: cargo: command not found
make: *** [Makefile:148: /home/rongtao/Git/rtoax/bcc/libbpf-tools/blazesym/target/release/libblazesym.a] Error 127

$ sudo dnf install cargo

since commit d060934

rpm: sudo dnf install cargo
deb: sudo apt-get install cargo

[chenhengqi]

Instead of having this change, maybe we can check whether cargo exists and disable the blazesym feature if not.

Like we do in libbpf-bootstrap:
https://github.com/libbpf/libbpf-bootstrap/blob/938651fcef787f3885b7c32792851f8423bf8421/examples/c/Makefile#L24-L32

[chantra]

Instead of having this change, maybe we can check whether cargo exists and disable the blazesym feature if not.

Like we do in libbpf-bootstrap: https://github.com/libbpf/libbpf-bootstrap/blob/938651fcef787f3885b7c32792851f8423bf8421/examples/c/Makefile#L24-L32

or if it was going to be required, we should make cmake fail early if cargo is not found. cc @davemarchevsky

[Rtoax]

@chenhengqi New PR #4227

[chenhengqi]

Just merged #4227. Since BCC core functionalities don't rely on Rust, let's don't force users to install Rust. Closing this.