compile error on raspberry (ARM): unrecognized command line option ‘-msse4’

[philippkeller]

What did you do?

pip3 install -U --force-reinstall pillow-simd on a raspberry pi zero

What did you expect to happen?

Compile and install pillow-simd

What actually happened?

the compile step failed. I think the relevant section is arm-linux-gnueabihf-gcc: error: unrecognized command line option ‘-msse4’: in this context:

 arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DHAVE_LIBJPEG -DHAVE_LIBZ -DPILLOW_VERSION="7.
0.0.post3" -I/usr/include/freetype2 -I/tmp/pip-install-c7i2f9uv/pillow-simd/src/libImaging -I/tmp/pip-install-c7i2f9uv/pillow-simd -I/usr/include -I/usr/local/include -I/usr/include/python3.7m -c src/_imaging.c
-o build/temp.linux-armv6l-3.7/src/_imaging.o -msse4
  arm-linux-gnueabihf-gcc: error: unrecognized command line option ‘-msse4’

Here is the full error.

my first attempt was to use CC="cc -mavx2" pip install -U --force-reinstall pillow-simd but -maxvx2 seems not to be available on arm so I skipped it

What are your OS, Python and Pillow versions?

• OS: Linux raspberrypi 4.19.75+ #1270 Tue Sep 24 18:38:54 BST 2019 armv6l GNU/Linux
• Python: Python 3.7.3
• Pillow: latest from pip (Pillow-SIMD 7.0.0.post3)

[philippkeller]

I just realize that there is also this open issue to add arm support, so it might just not be done yet. Although, reading through some stackoverflow posts it seems that people got that running on a raspberry.

[homm]

Pillow-SIMD is not intended for ARM