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https://issues.apache.org/jira/browse/ARROW-9744?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kouhei Sutou resolved ARROW-9744.
---------------------------------
Fix Version/s: 2.0.0
Resolution: Fixed
Issue resolved by pull request 7982
[https://github.com/apache/arrow/pull/7982]
> [Python] Failed to install on aarch64
> -------------------------------------
>
> Key: ARROW-9744
> URL: https://issues.apache.org/jira/browse/ARROW-9744
> Project: Apache Arrow
> Issue Type: Bug
> Components: Python
> Affects Versions: 0.17.1
> Environment: AWS m6g (ARM64 'Graviton2' CPU):
> Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp
> cpuid asimdrdm lrcpc dcpop asimddp ssbs
> CPU implementer : 0x41
> CPU architecture: 8
> CPU variant : 0x3
> CPU part : 0xd0c
> CPU revision : 1
> OS: Linux version 5.3.0-1032-aws (buildd@bos02-arm64-053) (gcc version 7.5.0
> (Ubuntu/Linaro 7.5.0-3ubuntu1~18.04)) #34~18.04.2-Ubuntu SMP Fri Jul 24
> 10:03:03 UTC 2020
> Reporter: Matthew Meen
> Assignee: Kouhei Sutou
> Priority: Major
> Labels: pull-request-available
> Fix For: 2.0.0
>
> Attachments: cmake-info.txt, pyarrow_017.txt
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> My team is attempting to migrate some workloads from x86-64 to ARM64, a
> blocker for this is PyArrow failing to install. `pip install pyarrow` fails
> to build the wheel as -march isn't correctly resolved:
> {noformat}
> -- System processor: aarch64
> -- Performing Test CXX_SUPPORTS_ARMV8_ARCH
> -- Performing Test CXX_SUPPORTS_ARMV8_ARCH - Failed
> -- Arrow build warning level: PRODUCTION
> CMake Error at cmake_modules/SetupCxxFlags.cmake:338 (message):
> Unsupported arch flag: -march=.
> {noformat}
> It's possible to get the build to work after editing
> `cmake_modules/SetupCxxFlags.cmake` to force ARROW_ARMV8_ARCH_FLAG to end up
> as an architecture such as 'armv8-a' - although some more elaborate logic is
> really needed to pick up the correct extensions.
> I can see that there have been a number of items discussed in the past both
> on Jira and in GitHub issues ranging from simple fixes to the cmake script to
> more elaborate fixes cross-product for arch detection - but I wasn't able to
> discern how the project wishes to proceed.
> With AWS pushing their ARM-based instances heavily at this point I would
> advocate for picking a direction before an influx of new issues.
>
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