Austin Seipp

The inability to write directly into the raw homedir is *not* actually that unusual and will probably become more common I'm afraid thanks to the rise of things like systemd-homed,...

> If anything it's much better to say "Get your XDG_RUNTIME_DIR setup appropriately and buck2 will use it." Just to be clear here, I mean we should literally just *mandate*...

> > I literally can't think of a single modern distro that hasn't hopped on this train > > I googled "XDG_RUNTIME_DIR not set", it is a lot of people...

Having such a target would also be useful for `bxl` scripts where I want to hardcode a name referring to every target pattern, without needing to repeat all the cell...

> You could imagine supporting syntax like `...//...` for it. I'd be perfectly happy with that, in this case; the syntax is perhaps a little less nice than `buck2 build...

I believe the existing prelude does actually have some support for BOLT already, so presumably it could work e.g. with `cxx_binary`. I don't know how to enable it, though, someone...

If you need some toolchains with glibc prebuilt and equipped along with some dependencies (zlib, python, etc), [you can get them here](https://toolchains.bootlin.com/). That's what's used by [gcc-toolchain](https://github.com/aspect-build/gcc-toolchain) for Bazel. I...

And that's of course still not enough to make things truly hermetic. Some things will be sanitized (like env variables), but you'll want to be super sure you aren't, for...

> Do you package up libs and headers too? If so, how do you actually do this, specifically? Most of the time with things like [Buildroot](https://buildroot.org)-based cross compilers (including x86_64-Linux...

This would also be really useful for platform-specific tests. For example I just got an AVX-512 machine, and I would need something like this to say "This test or binary...