Arm docker build

[ryoppippi]

No description provided.

[matu3ba]

Zig libstd has also support for using qemu runner. Not sure if that is simpler to use.

[ryoppippi]

@matu3ba
Thanks.
If you can do this, could you send us a PR?

[ryoppippi]

One thing I am curious about is opencv's dependence on blas, etc. it is hard to cross-compile all those libs

[matu3ba]

From what I know, ARM32 doesnt work due to one missing header in Zig (there is an open PR for it).
Otherwise, there are several guides like this one https://pranavnatekar.medium.com/cross-compile-opencv-for-risc-v-460305012adb or this one for embedded https://medium.com/analytics-vidhya/the-ultimate-opencv-cross-compilation-guide-for-embedded-processors-f2fdc8ccb7b2

Maybe I am too naive, but opencv should have a build system that supports cross-compilation of core dependencies.
Blas is also relative simple to cross-compile, if you know what your are doing: OpenMathLib/OpenBLAS#1810

Though I am not entirely sure, because the wiki of opencv appears to be outdated.

Can you list the dependencies, 1. which are required for cross-compilation and 2. which have no build system integration of opencv?

[ryoppippi]

@matu3ba
Thank you for suggesting a lot and sorry for my lateness.
Please give me time to investigate (unfortunately I do not have time so much in this month)