Hi Arthur, > On 9 Apr 2024, at 13:01, Arthur Cohen <arthur.co...@embecosm.com> wrote: >
> On 4/9/24 10:55, Iain Sandoe wrote: >> Hi Arthur, >>> On 9 Apr 2024, at 11:40, Arthur Cohen <arthur.co...@embecosm.com> wrote: >>> On 4/9/24 09:47, John Paul Adrian Glaubitz wrote: >>>> Hello, >>>> On Mon, 2024-04-08 at 18:33 +0200, pierre-emmanuel.pa...@embecosm.com >>>> wrote: >>>>> The rust frontend requires cargo to build some of it's components, >>>>> it's presence was not checked during configuration. >>>> Isn't this creating a hen-and-egg problem? How am I supposed to build a >>>> Rust >>>> compiler for a target which is not supported by rustc (yet) when gccrs is >>>> supposed to build-depend on cargo which requires rustc? >>>> Adrian >>> >>> Quick reminder in case you haven't seen our Request for Comments on the >>> main ML that this is only a temporary solution. Once gccrs can compile its >>> dependencies, we'll go through a more "classical" bootstrapping chain. >> I don’t suppose there’s some way to make a “download prerequisites” action >> for this? > > Do you mean downloading cargo/Rust as a prerequisite? I don't believe this is > being done for GNAT/GDC, but I might be wrong. No, you are quite correct, but the critical difference is that Ada and D both make use of earlier versions of GCC - so that (if one wished to be particular) it is possible to start with an earlier version of GCC and work forwards (in fact that’s what I’ve [I guess all of us] have done for D … and did a looong time ago for Ada). The difference here is that we need to install an executable from somewhere else - and making that as simple and trustworthy as possible seems like a good move to encourage folks to build & test rust. > If you mean the dependencies for our Rust components, those are currently > being vendored so that we're able to build them offline. I'll push the > commits soon. OK.. I’m sorry to say this - but what’s actually needed is still a little fuzzy to me - but I am happy to wait to read the documentation patch and comment then. thanks Iain > >> (I realise that the prerequisite might not be available for a given platform >> - but then the configure will then just fail to detect them and carry on). >> At the least the build documentation requested should (ideally) try to lower >> the barrier to finding the deps and give reliable sources for them. >>> rustc_codegen_gcc can probably already be used for building these >>> dependencies however, if you'd like to have a look at that. >> Detailing the verious options would also be a helpful part of the build doc. >> thanks >> Iain > > Best, > > Arthur
