We are trying to install jevois-inventor onto the ubuntu18.04 but we flashed the ubuntu18.04 onto a raspberry pi 4 which is an arm64 architecture(we think). We tried to install amd64 packages individually on ubuntu terminal, but we can not install build-essential, gcc, etc packages for amd64. We are new to ubuntu and raspberry pi so any information would be very helpful.
There would be no way to install amd64 packages directly on the PI4.
You might need to find a arm version of the packet or recompile it with the correct flags. I don't think I understood, but if you want to compile code for the amd64 architecture, it would be possible in the Pi. What you can't is run packages already compiled for amd64 on the PI.
If you absolutely need to run the amd64 packages on the PI Linux installation, the easiest solution is to install a minimal base machine on the board and install a hypervisor, as VirtualBox, Xen project or VMWare.
This will allow the creation of a abstraction layer from the arm to the amd64 architectures.
This will also create a huge overhead on the board, because it will need to sustain two kernels running at the same time, sharing process and memory.
What is this Multiarch?
Debian said: Multiarch lets you install library packages from multiple architectures on the same machine. This is useful in various ways, but the most common is installing both 64 and 32-bit software on the same machine and having dependencies correctly resolved automatically. In general, you can have libraries of more than one architecture installed together and applications from one architecture or another installed as alternatives. Note that it does not enable multiple architecture versions of applications to be installed simultaneously.
In addition, I didn't test but you can install
amd64 packages on a raspberry pi with