'Rust - Finding out correct build target

I am trying to find correct build target for CradlePoint IBR200 router:
https://cradlepoint.com/product/endpoints/ibr200/

System info from python program looks like this:

System Linux 4.4.100-coconut+. 
Platform Linux-4.4.100-coconut+-mips-with-libc1
Machine mips
Architecture ('32bit', '') 

I have tried compiling with target mips-unknown-linux-gnu and linker mips-linux-gnu-gcc but the executable will not run on the system

How can I determine correct target / linker?



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