Provide linux-arm (32bit)?

[nils-werner]

Comment:

The way I read the build instructions you are using a Docker image that already contains QEMU for 32 and 64bit ARM.

Is there a reason you only build GNURadio for linux-aarm64, but not for linux-arm?

Although many modern ARM devices, like Raspberry Pi's, are 64bit, many Linux distros are prinmarily supporting 32bit on them [1] [2], so it would be really helpful to have a 32bit build to run GNURadio on them.

[ryanvolz]

Of course it's not just GNU Radio that would need to be built for 32-bit Linux ARM, but all of its dependencies as well. That means it really needs to be something that the conda-forge project supports, which it currently does not. I don't know for sure why it's not supported, but if I had to guess:

1. No easy access to native build hardware (might be slow anyway?), so emulation or cross-compilation is required. The infrastructure to do that came only a few years ago, so there's no momentum from when 32-bit ARM was more prevalent.
2. Not enough demand to make the effort (maintainer time and build time) worth it.
3. As you say, most modern ARM devices are 64-bit, and it's just the default operating system that is 32-bit. Users who really want it can replace the OS with a 64-bit one, then use the linux-aarch64 conda-forge packages.
4. Conda-forge is mostly a volunteer effort, and nobody has wanted to scratch that itch badly enough to make it happen.

Maybe that person is you? 😜

[nils-werner]

Oh right, I didn't catch that nothing on conda-forge is built for 32-bit ARM. Sorry for the confusion 😅