Hello @tooz,
The problem is it should be rk3399pro-tinker_edge_r.img instead of tinker_edge_r
and also there are errors compiling scripts/dtc/dtc-lexer.lex.c_shipped because of multiple definitions of yyalloc on main branch
5). make ARCH=arm64 tinker_edge_r.img CROSS_COMPILE=/media/edger/gcc-linaro-6.3.1-2017.05-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu- -j32
I get an error no rule to make tinker_edge_r this did u mean Image?