cross compilation requirements

[avin-hailo]

The documentation is a bit lacking about this... What variables should be set during cross compilation?

I'm using a cmake toolchain file and I found that the result library is using the native processor name, even though my toolchain file defined the following:

set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_SYSTEM_PROCESSOR aarch64)

set(CMAKE_C_COMPILER aarch64-linux-gnu-gcc)
set(CMAKE_CXX_COMPILER aarch64-linux-gnu-g++)
set(CMAKE_STRIP aarch64-linux-gnu-strip CACHE FILEPATH "Strip")

To combat that, I defined set(PYTHON_MODULE_EXTENSION ...) using CMAKE_SYSTEM_PROCESSOR

Another issue is about python package. Is it enough to set PYTHON_EXECUTABLE? What should that value be when cross compling? I found that using the native (x64) python and cross compiling (aarch64) works - does that make sense?

So, to summarize - what cmake variables should I pass for a complete cross compilation