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Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
From: zhangdandan <zhangdandan@loongson.cn>
Subject: python-hdf5plugin: Use the -margin=native parameter
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Date: Tue, 16 Dec 2025 17:31:00 +0800
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Delivered-To: submit@bugs.debian.org

Source: python-hdf5plugin
Version: 5.1.0-1

Hello maintainer,
I recently discovered that python-hdf5plugin is built with the 
-march=native GCC option.
Some of the logs are follows,
```
INFO:root:x86_64-linux-gnu-gcc -g -O2 
-Werror=implicit-function-declaration 
-ffile-prefix-map=/build/reproducible-path/python-hdf5plugin-5.1.0=. 
-fstack-protector-strong -fstack-clash-protection -Wformat 
-Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 
-fPIC -I/usr/include/python3.13 -c /tmp/tmpdka9vugw/source.c -o 
/tmp/tmpdka9vugw/tmp/tmpdka9vugw/source.o -march=native
```
The details can be found at 
https://buildd.debian.org/status/fetch.php?pkg=python-hdf5plugin&arch=all&ver=5.1.0-1&stamp=1745501392&raw=0.

I checked that many packages disable -march=native.

Please pay attention to the above phenomenon.

Best regards,
Dandan Zhang
]