libi2c-dev cannot be installed for multiple architectures

[Tom Hollis]

I am running ubunutu 20.04 on a 64bit ARM architecture.

When I try to install the armhf version of the libi2c-dev package, so I can cross compile with this library, apt removes the native version:

$sudo apt install libi2c-dev:armhf --no-install-recommends

Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
  i2c-tools libc6-dev:armhf libcrypt-dev:armhf libusb-0.1-4:armhf linux-libc-dev:armhf read-edid
Use 'sudo apt autoremove' to remove them.
Recommended packages:
  i2c-tools:armhf
The following packages will be REMOVED:
  libi2c-dev
The following NEW packages will be installed:
  libi2c-dev:armhf
0 upgraded, 1 newly installed, 1 to remove and 0 not upgraded.
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