Mention that tests need a Python-enabled gdb.

[vext01]

As mentioned here:
rust-lang/rust#52452 (comment)

It would be good is the rust compiler guide mentioned that the compiler tests need gdb with Python support.

Are there any other test dependencies that we should mention? If there are a few, perhaps we'd even want a subsection listing them.

Thanks

[eddyb]

We should be detecting this. cc @michaelwoerister @tromey @Mark-Simulacrum

[vext01]

We should be detecting this

I think that's also a good idea.

[vext01]

The failure isn't mine, I don't think.

[Mark-Simulacrum]

We should point users to the config.toml, not configure -- configure is primarily intended for automated scripts, whereas the user should edit config.toml manually (copying fields from config.toml.example).

[vext01]

We should point users to the config.toml, not configure -- configure is primarily intended for automated scripts

I'm talking about the configure script distributed with the gdb source code.

[mark-i-m]

LGTM. I left one comment. I will wait for the discussion to converge on a decision, though.

[mark-i-m]

Also, I restarted the build. It looked like a transient failure...

[tromey]

We should be detecting this

I filed rust-lang/rust#56346 for this.

[vext01]

The last commit addresses @mark-i-m's comment.

[vext01]

Another transient test failure

[vext01]

Addressed @shepmaster's comment.

[mark-i-m]

Thanks!