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Re: OCaml and running shipped binaries (was Re: multiarch and interpreters/runtimes)

Le 05/05/2013 03:50, Adam Borowski a écrit :
> On Sun, May 05, 2013 at 12:08:06AM +0200, Stéphane Glondu wrote:
>> As far as bootstrapping is concerned, the OCaml sources include
>> precompiled (bytecode) executables that are used in a first stage of the
>> build process (i.e. ocaml doesn't build-depend on itself). So no need
>> for cross-compilation there. OCaml has very few build-dependencies
>> (there are Tcl/Tk/libX11, but they are optional) and should always be
>> buildable natively.
> Wait, wait, wait... so OCaml ships precompiled binaries and runs them during
> the build?  It seems so, as it FTBFSes if you remove the binaries from boot/.

They are used only for the first phase of bootstrapping. Then,
everything is recompiled using the newly compiled binaries. And again.
Until there is a fixpoint. Everything that eventually ends up in binary
packages has been compiled from source, and using binaries that have
been compiled from source.

> That's RC, I think.

With the way I explained above, I disagree.

Also, there is no guarantee that one version of ocaml can compile the
next one: a new version of the compiler is free to use the new features
it introduces. Upstream only supports compiling one version with itself.



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