error: command '/usr/bin/aarch64-linux-gnu-gcc'

[DezzardHD]

I am trying to install ems_bus on my raspberry pi 4:
Specs:
Revision: c03114
OS description: Debian GNU/Linux 11 (bullseye)
Architecture: arm64

pi@raspberrypi:~/EMSbus/ems_bus-master $ python3 setup.py build install --user
/usr/lib/python3.9/distutils/dist.py:274: UserWarning: Unknown distribution option: 'python_requires'
  warnings.warn(msg)
/usr/lib/python3.9/distutils/dist.py:274: UserWarning: Unknown distribution option: 'install_requires'
  warnings.warn(msg)
running build
running build_py
running build_ext
building 'ems_bus.ems_serio' extension
aarch64-linux-gnu-gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O2 -Wall -g -ffile-prefix-map=/build/python3.9-PN012d/python3.9-3.9.2=. -fstack-protector-strong -Wformat -Werror=format-security -g -fwrapv -O2 -g -ffile-prefix-map=/build/python3.9-PN012d/python3.9-3.9.2=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DPYTHON_MODULE=1 -I/usr/include/python3.9 -c ems_serio/crc.c -o build/temp.linux-aarch64-3.9/ems_serio/crc.o
Assembler messages:
Fatal error: can't create build/temp.linux-aarch64-3.9/ems_serio/crc.o: Keine Berechtigung
error: command '/usr/bin/aarch64-linux-gnu-gcc' failed with exit code 1

Following the installation instructions for aarch64-linux-gnu-gcc I've figured that I had already installed the compiler.
So why do I get the error: command '/usr/bin/aarch64-linux-gnu-gcc' failed with exit code 1?

Another thing I couldn't figure out was, why there are these warnings:

pi@raspberrypi:~/EMSbus/ems_bus-master $ python3 setup.py build install --user
/usr/lib/python3.9/distutils/dist.py:274: UserWarning: Unknown distribution option: 'python_requires'
  warnings.warn(msg)
/usr/lib/python3.9/distutils/dist.py:274: UserWarning: Unknown distribution option: 'install_requires'
  warnings.warn(msg)

Aside from these problems:
Does somebody know if I can read data from "Buderus RC20" using ems_bus?
I'm not sure if it even uses EMS bus version 1 and wasn't able to figure that one out.

I appreciate any hints to get it to work. :)

[CreaValix]

Hi Moritz,
check out ems_bus/ems_devices.py, you'll see that the RC20 uses EMS. However, I tested it only with my RC20, so you may find issues, as it was never tested with an RC20.

For the warning, try this: google/gdata-python-client#66
It seems that Python changed the setup tool.

Lastly, your build fails with an access error. Check your permissions, maybe you checked out as root? Better try again with a clean environment...
I also do not understand why setup.py chooses a cross compiler, as you are already ON the RPi 4.

[DezzardHD]

Hi CreaValix,

thanks for responding. Just wanted to let you know that I appreciate your help, but I decided to gave up on getting it running.

Best regards
Moritz