tce-load -i compiletc net-snmp-dev cups-dev libusb-dev dbus-python3.8-dev libtiff-dev

https://sourceforge.net/projects/hplip/files/hplip/3.18.6/hplip-3.18.6.tar.gz

cd hplip-3.18.6 [last version without libImageProcessor.so]

edit io/hpmud/musb.h
#include <libusb-1.0/libusb.h>

sudo ln -s /usr/local/include/python3.8/cpython /usr/local/include/cpython

CC="gcc -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -Os -pipe" CXX="g++ -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -Os -pipe -fno-exceptions -fno-rtti" ./configure --prefix=/usr/local --sysconfdir=/usr/local/etc --localstatedir=/var --disable-gui-build --disable-qt4 --disable-doc-build --with-cupsbackenddir=/usr/local/lib/cups/backend --with-cupsfilterdir=/usr/local/lib/cups/filter --with-icondir=/usr/local/share/applications --bindir=/usr/local/bin --with-mimedir=/usr/local/share/cups/mime --disable-scan-build

find . -name Makefile -type f -exec sed -i 's/-g -O2//g' {} \;
find . -name config.status -type f -exec sed -i 's/-g -O2//g' {} \;

make [3m 34.58s]
sudo make install

libtool: link: g++ -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -Os -pipe -fno-exceptions -fno-rtti -DAPDK_LITTLE_ENDIAN -I/usr/local/include/dbus-1.0 -I/usr/local/lib/dbus-1.0/include -DCONFDIR=\"/etc/hp\" -o hpcups hpcups-HPCupsFilter.o hpcups-dbuscomm.o hpcups-Compressor.o hpcups-Mode2.o hpcups-Mode3.o hpcups-Mode9.o hpcups-Mode10.o hpcups-ModeDeltaPlus.o hpcups-ModeJbig.o hpcups-ErnieFilter.o hpcups-EncapsulatorFactory.o hpcups-Encapsulator.o hpcups-Pcl3.o hpcups-Pcl3Gui.o hpcups-Pcl3Gui2.o hpcups-LJMono.o hpcups-LJColor.o hpcups-LJFastRaster.o hpcups-LJJetReady.o hpcups-LJZjStream.o hpcups-LJZxStream.o hpcups-Job.o hpcups-Pipeline.o hpcups-Processor.o hpcups-RasterSender.o hpcups-ColorMatcher.o hpcups-Halftoner.o hpcups-Scaler.o hpcups-dj400ColorMaps.o hpcups-dj600ColorMaps.o hpcups-dj970ColorMaps.o hpcups-dj8xxColorMaps.o hpcups-dj4100ColorMaps.o hpcups-BreakTables.o hpcups-Utils.o hpcups-SystemServices.o hpcups-QuickConnect.o hpcups-ModeJpeg.o jccolor.o jdatadbf.o hpcups-Lidil.o hpcups-LidilCompress.o hpcups-dj3320ColorMaps.o hpcups-dj3600ColorMaps.o hpcups-Hbpl1.o utils.o hpcups-Hbpl1_Wrapper.o hpcups-genPCLm.o hpcups-genJPEGStrips.o hpcups-RunLenEncoding.o  -L./prnt/hpcups/ /usr/local/lib/libjpeg.so -ldl -lImageProcessor -lcups -lcupsimage -lz -L/usr/local/lib /usr/local/lib/libdbus-1.so -lcrypto
/usr/local/bin/ld: skipping incompatible ./prnt/hpcups//libImageProcessor.so when searching for -lImageProcessor
/usr/local/bin/ld: cannot find -lImageProcessor
collect2: error: ld returned 1 exit status
make: *** [Makefile:5453: hpcups] Error 1

ls -l prnt/hpcups/libImageProcessor.so
lrwxrwxrwx    1 tc       staff           27 Sep 24 17:41 prnt/hpcups/libImageProcessor.so -> libImageProcessor-x86_32.so

/var/lib/hp
/var/log/hp/tmp

Edit /etc/hp/hplip.conf
bin=/usr/bin -> /usr/local/bin

Edit /etc/udev/rules.d/56-hpmud.rules
lp -> staff
/usr/bin/hp-config_usb_printer /usr/local/bin/hp-config_usb_printer

correct python location in:
/usr/local/share/hplip/base/magic.py
/usr/local/share/hplip/uninstall.py
/usr/local/share/hplip/upgrade.py
/usr/local/share/hplip/logcapture.py
/usr/local/share/hplip/doctor.py

$ hp-makeuri 192.168.1.170
...
CUPS URI: hp:/net/Officejet_6700?ip=192.168.1.170
SANE URI: hpaio:/net/Officejet_6700?ip=192.168.1.170
HP Fax URI: hpfax:/net/Officejet_6700?ip=192.168.1.170

$ hp-probe -bnet
...
Device URI                               Model           Name    
  ---------------------------------------  --------------  --------
  hp:/net/Officejet_6700?ip=192.168.1.170  Officejet_6700  HP86C02B

$ hp-info -dhp:/net/Officejet_6700?ip=192.168.1.170
...
error: No device found that support this feature