Suppressing the warnings on 32-bit MSVC sounds like a reasonable
compromise. Is there an open PR for this (and what is the
corresponding Jira issue so we don't lose track of it)?

On Fri, Jul 22, 2022 at 1:23 PM Arkadiy Vertleyb (BLOOMBERG/ 120 PARK)
<avertl...@bloomberg.net> wrote:
>
> Or live with the warnings.  Or cast his sizes to _int64, if the warnings are 
> critical.
>
> From: dev@arrow.apache.org At: 07/22/22 14:06:34 UTC-4:00To:  Arkadiy 
> Vertleyb (BLOOMBERG/ 120 PARK ) ,  dev@arrow.apache.org
> Subject: Re: Help needed with PR #13659: Fixing build/unit test issues in 
> msvc/win32
>
> The problem with (2) is that a library user can only work around it by
> suppressing warnings with pragmas when including Arrow headers.
>
> This is somewhat unfriendly from a user perspective.
>
> On Fri., Jul. 22, 2022, 08:11 Arkadiy Vertleyb (BLOOMBERG/ 120 PARK), <
> avertl...@bloomberg.net> wrote:
>
> > This is what I would do:
> >
> > 1) Suppress warnings in cmake input file for this particular platform.
> > This will let the user build the arrow libs.
> >
> > 2) Let those users who care about 32 bits worry about the warnings in the
> > headers.
> >
> > Regards,
> > Arkadiy
> >
> > From: dev@arrow.apache.org At: 07/22/22 10:18:09 UTC-4:00To:
> > dev@arrow.apache.org
> > Subject: Re: Help needed with PR #13659: Fixing build/unit test issues in
> > msvc/win32
> >
> >
> > Ah, that's a good point. Then we should probably use explicit casts.
> >
> >
> > Le 22/07/2022 à 15:58, James Duong a écrit :
> > > Seems reasonable to suppress this warning on this single platform.
> > However
> > > if we do this using a compiler option, we may hide warnings in public
> > > headers from the build. This isn't great since library users may have
> > > policies that disallow warnings.
> > >
> > > On Fri., Jul. 22, 2022, 05:47 Antoine Pitrou, <anto...@python.org>
> > wrote:
> > >
> > >>
> > >> We could perhaps suppress the integer downcast warnings, but only on
> > >> 32-bit Windows (not 64-bit, not other platforms).
> > >>
> > >> Regards
> > >>
> > >> Antoine.
> > >>
> > >>
> > >> Le 22/07/2022 à 14:42, Arkadiy Vertleyb (BLOOMBERG/ 120 PARK) a écrit :
> > >>> Hi James.
> > >>>
> > >>> I don't have strong feelings about whose PR is used and how exactly the
> > >> issue is fixed.  All I care about at this point is working (and
> > maintained)
> > >> MSVC 32 bit version.  I need this for my project at work.
> > >>>
> > >>> If you feel that your PR will solve this issue, and is close to being
> > >> approved, please let me know and I will stop worrying about this.
> > >>>
> > >>> If you PR is not being approved any time soon, I will proceed with
> > mine,
> > >> and you can add your changes on top of it.  Should not be a big deal,
> > since
> > >> I only make a few small changes.
> > >>>
> > >>> Please let me know how you think we should proceed with this.
> > >>>
> > >>> Thanks,
> > >>> Arkadiy
> > >>>
> > >>> From: dev@arrow.apache.org At: 07/21/22 18:29:33 UTC-4:00To:  Arkadiy
> > >> Vertleyb (BLOOMBERG/ 120 PARK ) ,  dev@arrow.apache.org
> > >>> Subject: Re: Help needed with PR #13659: Fixing build/unit test issues
> > >> in msvc/win32
> > >>>
> > >>> Feedback I got here was to use static_cast:
> > >>> https://github.com/apache/arrow/pull/13532#issuecomment-1177488433
> > >>>
> > >>> I'm indifferent as to whether we want to do the static_casts or just
> > >>> suppress the warning as you've done.
> > >>>
> > >>> Your PR isn't building the 32-bit build in CI btw. It fails finding
> > >> OpenSSL:
> > >>>
> > >>
> >
> >
> https://github.com/apache/arrow/runs/7432759888?check_suite_focus=true#step:7:20
> > >>> 1
> > >>>
> > >>> I've fixed this in the changes to the github workflow in my PR.
> > >>>
> > >>>
> > >>> On Thu, Jul 21, 2022 at 12:47 PM Arkadiy Vertleyb (BLOOMBERG/ 120
> > PARK) <
> > >>> avertl...@bloomberg.net> wrote:
> > >>>
> > >>>> Hi James.
> > >>>>
> > >>>> My PR makes the compiler ignore the warnings.
> > >>>>
> > >>>> As far as I understand, this issue cannot be consistently resolved
> > >> within
> > >>>> the Google paradigm arrow follows on this subject.  The google
> > paradigm
> > >>>> requires to treat all the sizes as signed 64 bit integers, regardless
> > of
> > >>>> the architecture.  This paradigm is obviously at odds with the
> > standard
> > >> C++
> > >>>> paradigm.
> > >>>>
> > >>>> Changing of the paradigm is obviously not anything I want to propose
> > at
> > >>>> this point, hence I don't see any other way as to just switch off the
> > >>>> warnings.
> > >>>>
> > >>>> Thanks,
> > >>>> Arkadiy
> > >>>>
> > >>>>
> > >>>> From: dev@arrow.apache.org At: 07/21/22 13:59:51 UTC-4:00To:
> > >>>> dev@arrow.apache.org
> > >>>> Cc:  Arkadiy Vertleyb (BLOOMBERG/ 120 PARK )
> > >>>> Subject: Re: Help needed with PR #13659: Fixing build/unit test issues
> > >> in
> > >>>> msvc/win32
> > >>>>
> > >>>> Hi Arkadiy,
> > >>>>
> > >>>> I've been working on a PR for fixing 32-bit Visual Studio here which
> > has
> > >>>> some of the same changes.
> > >>>> It also enables the 32-bit VS build in CI, which fails due to a ton of
> > >>>> integer implicit cast warnings:
> > >>>> https://github.com/apache/arrow/pull/13532
> > >>>>
> > >>>> Most of this commit is fixing 32-bit cast errors, along with a few
> > >> changes
> > >>>> to call bit_util::PopCount instead of ARROW_POPCOUNT64()
> > >>>>
> > >>>> On Thu, Jul 21, 2022 at 7:22 AM Raul Cumplido Dominguez
> > >>>> <r...@voltrondata.com.invalid> wrote:
> > >>>>
> > >>>>> Yes, issues 1-3 are not related to your PR.
> > >>>>>
> > >>>>> On Thu, Jul 21, 2022 at 4:04 PM Arkadiy Vertleyb (BLOOMBERG/ 120
> > PARK)
> > >> <
> > >>>>> avertl...@bloomberg.net> wrote:
> > >>>>>
> > >>>>>> Thanks Raul.
> > >>>>>>
> > >>>>>> Does this mean issues 1-3 are not really caused by my PR and I just
> > >>>> need
> > >>>>>> to wait for them to be fixed?
> > >>>>>>
> > >>>>>>
> > >>>>>> From: dev@arrow.apache.org At: 07/21/22 09:51:09 UTC-4:00To:
> > Arkadiy
> > >>>>>> Vertleyb (BLOOMBERG/ 120 PARK ) ,  dev@arrow.apache.org
> > >>>>>> Subject: Re: Help needed with PR #13659: Fixing build/unit test
> > issues
> > >>>> in
> > >>>>>> msvc/win32
> > >>>>>>
> > >>>>>> Hi Arkadiy,
> > >>>>>>
> > >>>>>> For issues 2 and 3 there is currently an issue [1] with the protobuf
> > >>>>>> version [2] distributed with homebrew [3] happening on master. These
> > >>>> ones
> > >>>>>> should be fixed once the upstream homebrew package is distributed.
> > >>>>>> Issue 1 is also happening on master and I am not sure whether the
> > >> issue
> > >>>>> is
> > >>>>>> tracked independently but there was a fix [4] on a PR [5]. I'll
> > follow
> > >>>>> that
> > >>>>>> one up.
> > >>>>>>
> > >>>>>> Thanks,
> > >>>>>> Raúl
> > >>>>>>
> > >>>>>> [1] https://issues.apache.org/jira/browse/ARROW-17162
> > >>>>>> [2] https://github.com/protocolbuffers/protobuf/pull/10271
> > >>>>>> [3] https://github.com/Homebrew/homebrew-core/pull/106252
> > >>>>>> [4]
> > >>>>>>
> > >>>>>>
> > >>>>>
> > >>>>
> > >>>>
> > >>>
> > >>
> >
> >
> https://github.com/apache/arrow/pull/13634/commits/9e10f6c3399d83ebce5af551561fa
> > >>>>>> 3a16da9cd5e
> > >>>>>> <
> > >>>>>
> > >>>>
> > >>>>
> > >>>
> > >>
> >
> >
> https://github.com/apache/arrow/pull/13634/commits/9e10f6c3399d83ebce5af551561fa
> > >>>> 3a16da9cd5e
> > >>>>
> > >>> <
> > >>
> >
> >
> https://github.com/apache/arrow/pull/13634/commits/9e10f6c3399d83ebce5af551561fa
> > 3a16da9cd5e
> >
> <https://github.com/apache/arrow/pull/13634/commits/9e10f6c3399d83ebce5af551561fa3a16da9cd5e>
> > >>>
> > >>>>>>
> > >>>>>> [5] https://github.com/apache/arrow/pull/13634
> > >>>>>>
> > >>>>>> On Thu, Jul 21, 2022 at 3:24 PM Arkadiy Vertleyb (BLOOMBERG/ 120
> > PARK)
> > >>>> <
> > >>>>>> avertl...@bloomberg.net> wrote:
> > >>>>>>
> > >>>>>>> Hi all.
> > >>>>>>>
> > >>>>>>> Can someone help me understand how the changes in this PR (
> > >>>>>>>
> > >>>>>>
> > >>>>>>
> > >>>>>
> > >>>>
> > >>>>
> > >>>
> > >>
> >
> >
> https://github.com/apache/arrow/pull/13659/commits/e77ec9a84dab750bf016f9f5bd02e
> > >>>>>> a48f2c8d77f
> > >>>>>> <
> > >>>>>
> > >>>>
> > >>>>
> > >>>
> > >>
> >
> >
> https://github.com/apache/arrow/pull/13659/commits/e77ec9a84dab750bf016f9f5bd02e
> > >>>> a48f2c8d77f
> > >>>>
> > >>> <
> > >>
> >
> >
> https://github.com/apache/arrow/pull/13659/commits/e77ec9a84dab750bf016f9f5bd02e
> > a48f2c8d77f
> >
> <https://github.com/apache/arrow/pull/13659/commits/e77ec9a84dab750bf016f9f5bd02ea48f2c8d77f>
> > >>>
> > >>>>>>
> > >>>>>> )
> > >>>>>>> caused the following build failures?
> > >>>>>>>
> > >>>>>>> Thanks,
> > >>>>>>> Arkadiy
> > >>>>>>>
> > >>>>>>> Here are the failures:
> > >>>>>>>
> > >>>>>>> 1) AMD64 MacOS 10.15 GLib & Ruby
> > >>>>>>>
> > >>>>>>> c_glib/arrow-glib/meson.build:216:0: ERROR: Program 'glib-mkenums
> > >>>>>> mkenums'
> > >>>>>>> not found or not executable
> > >>>>>>>
> > >>>>>>> 2) AMD64 MacOS 10.15 Python 3
> > >>>>>>>
> > >>>>>>> E   ImportError:
> > >>>> dlopen(/usr/local/lib/python3.9/site-packages/pyarrow/
> > >>>>>>> lib.cpython-39-darwin.so, 2): Symbol not found:
> > >>>>>>> __ZN6google8protobuf8internal16InternalMetadataD1Ev
> > >>>>>>> E     Referenced from: /usr/local/lib/libarrow.900.dylib
> > >>>>>>> E     Expected in: flat namespace
> > >>>>>>> E    in /usr/local/lib/libarrow.900.dylib
> > >>>>>>>
> > >>>>>>> 3) AMD64 MacOS 10.15 C++
> > >>>>>>>
> > >>>>>>> Undefined symbols for architecture x86_64:
> > >>>>>>>
> > >>>>
> > "google::protobuf::internal::InternalMetadata::~InternalMetadata()",
> > >>>>>>> referenced from:
> > >>>>>>>         google::protobuf::MessageLite::~MessageLite() in
> > >>>>>>> libopentelemetry_proto.a(trace_service.pb.cc.o)
> > >>>>>>>         google::protobuf::MessageLite::~MessageLite() in
> > >>>>>>> libopentelemetry_proto.a(trace.pb.cc.o)
> > >>>>>>>         google::protobuf::MessageLite::~MessageLite() in
> > >>>>>>> libopentelemetry_proto.a(common.pb.cc.o)
> > >>>>>>>         google::protobuf::MessageLite::~MessageLite() in
> > >>>>>>> libopentelemetry_proto.a(resource.pb.cc.o)
> > >>>>>>> ld: symbol(s) not found for architecture x86_64
> > >>>>>>>
> > >>>>>>> 4) AMD64 Windows 2019 Win32 C++17
> > >>>>>>>
> > >>>>>>> -- Could NOT find SnappyAlt (missing: Snappy_LIB
> > Snappy_INCLUDE_DIR)
> > >>>>>>> -- Building snappy from source
> > >>>>>>> CMake Error at C:/Program
> > >>>>>>>
> > >>>>>>
> > >>>>>
> > >>>>
> > >>
> > Files/CMake/share/cmake-3.23/Modules/FindPackageHandleStandardArgs.cmake:230
> > >>>>>>> (message):
> > >>>>>>>     Could NOT find OpenSSL, try to set the path to OpenSSL root
> > folder
> > >>>> in
> > >>>>>> the
> > >>>>>>>     system variable OPENSSL_ROOT_DIR (missing:
> > OPENSSL_CRYPTO_LIBRARY)
> > >>>>>> (found
> > >>>>>>>     suitable version "1.1.1i", minimum required is "1.0.2")
> > >>>>>>> Call Stack (most recent call first):
> > >>>>>>>     C:/Program
> > >>>>>>>
> > >>>>>>
> > >>>>>
> > >>>>
> > >>
> > Files/CMake/share/cmake-3.23/Modules/FindPackageHandleStandardArgs.cmake:594
> > >>>>>>> (_FPHSA_FAILURE_MESSAGE)
> > >>>>>>>     C:/Program
> > >>>> Files/CMake/share/cmake-3.23/Modules/FindOpenSSL.cmake:578
> > >>>>>>> (find_package_handle_standard_args)
> > >>>>>>>     cmake_modules/ThirdpartyToolchain.cmake:1253 (find_package)
> > >>>>>>>     CMakeLists.txt:575 (include)
> > >>>>>>>
> > >>>>>>>
> > >>>>>>>
> > >>>>>>
> > >>>>>>
> > >>>>>>
> > >>>>>
> > >>>>
> > >>>>
> > >>>> --
> > >>>>
> > >>>> *James Duong*
> > >>>> Lead Software Developer
> > >>>> Bit Quill Technologies Inc.
> > >>>> Direct: +1.604.562.6082 | jam...@bitquilltech.com
> > >>>> https://www.bitquilltech.com
> > >>>>
> > >>>> This email message is for the sole use of the intended recipient(s)
> > and
> > >> may
> > >>>> contain confidential and privileged information.  Any unauthorized
> > >> review,
> > >>>> use, disclosure, or distribution is prohibited.  If you are not the
> > >>>> intended recipient, please contact the sender by reply email and
> > destroy
> > >>>> all copies of the original message.  Thank you.
> > >>>>
> > >>>>
> > >>>>
> > >>>
> > >>
> > >
> >
> >
> >
>
>

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