iamf-tools cross building

[yilun-zhangs]

@jwcullen
iamf-tools is compiled via bazel, could it support cross building with specified toolchain?
e.g. compile iamf-tool with mingw toolchain, generate windows target under ubuntu.

Thanks.

[jwcullen]

I see. I think it makes sense. Not sure when we can do it.

Bazel does support cross-compiling (see platforms). Maybe trying with --platforms or the legacy --crosstool_top flags it could be configured to do that type of build.

I'm not sure exactly what needs to change to make it work, but if you get something working we would accept a PR.

[nullr0ute]

Given libiamf uses CMake does it make sense to also use CMake for iamf-tools too as it supported cross compiling well and it would make for a consistent user experience.