I think the SHA in versions.txt is for the tarball specifically (prior to
decompression), so I think it'll complain if you set it to a repository
directory instead.

Jeroen


On Mon, 18 Jul 2022 at 20:40, Yaron Gvili <rt...@hotmail.com> wrote:

> ARROW_SUBSTRAIT_URL works for both a *.tar.gz file and a repository
> directory. In my experience, there is no need to also set any
> sha256-related setting.
>
>
> Yaron.
> ________________________________
> From: Li Jin <ice.xell...@gmail.com>
> Sent: Monday, July 18, 2022 2:34 PM
> To: dev@arrow.apache.org <dev@arrow.apache.org>
> Subject: Re: [C++] Question about substrait dependency in C++
>
> Thanks both! Let me try changing ARROW_SUBSTRAIT_URL. Should I set
> ARROW_SUBSTRAIT_URL just to local substrait tarball or sth else?
>
> On Mon, Jul 18, 2022 at 2:28 PM Yaron Gvili <rt...@hotmail.com> wrote:
>
> > Hi Li,
> >
> > I was just writing this.
> >
> > AFAIK, currently the Arrow C++ build system does not take prebuilt
> > Substrait C++ classes. The usual way is rebuilding Arrow C++ with a
> custom
> > Substrait repository, which is done by setting ARROW_SUBSTRAIT_URL to a
> > local Substrait repository. You can download this repository offline and
> > make it available to your internal build system. With this, the Arrow C++
> > build system auto-generates the Substrait C++ classes for the local
> > Substrait repository and builds into "libarrow_bundled_dependencies.a". I
> > wouldn't recommend doing these auto-generation and build steps on your
> own,
> > as you'd have to change the Arrow C++ build system, and specifically
> > "cpp/cmake_modules/ThirdpartyToolchain.cmake", to enable this.
> >
> >
> > Yaron.
> > ________________________________
> > From: Jeroen van Straten <jeroen.van.stra...@gmail.com>
> > Sent: Monday, July 18, 2022 2:27 PM
> > To: dev@arrow.apache.org <dev@arrow.apache.org>
> > Subject: Re: [C++] Question about substrait dependency in C++
> >
> > Hi,
> >
> > I'm not sure I completely understand what you're trying to do, but if
> lack
> > of internet access is the only problem, I think you should just be able
> to
> > override the URL it tries to download by setting the ARROW_SUBSTRAIT_URL
> > environment variable to some local file:// URL. I think it should work as
> > long as the hash matches what Arrow's build system expects from
> > thirdparty/versions.txt.
> >
> > I'm not sure why you're not seeing the library. With `--preset
> > ninja-debug`, I'm getting a libsubstrait.a in build/debug. I'm not
> familiar
> > enough with Arrow's build system to provide more help there.
> >
> > Regards,
> > Jeroen
> >
> > On Mon, 18 Jul 2022 at 18:00, Li Jin <ice.xell...@gmail.com> wrote:
> >
> > > Hello!
> > >
> > > I am working on integrating the latest Arrow C++ into our internal
> build
> > > system. Currently I am planning to build substrait C++ classes
> > > independently and provide header locations and so files to the Arrow
> > > Cmakefile - I wonder if that is a good approach? (We cannot download
> the
> > > substrait tarball in the internal build system when building Arrow)
> > >
> > > Also, I don't see a libsubstrait.so or libsubstrait.a in the build
> > > directory - is that statically linked?
> > >
> > > Thanks,
> > > Li
> > >
> >
>

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