Matthew Meen created ARROW-9744:
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Summary: [Python] aarch64 Installation Error
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
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:
{{ -- 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=.}}
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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