aarch-linux-gnu-g++ install

# apt install g++-aarch64-linux-gnu

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Reading package lists... Done

aarch64-linux-gnu-g++ aarch64-linux-gnu-gcc-ar-5 aarch64-linux-gnu-gcov

aarch64-linux-gnu-g++-5 aarch64-linux-gnu-gcc-nm aarch64-linux-gnu-gcov-5

aarch64-linux-gnu-gcc aarch64-linux-gnu-gcc-nm-5 aarch64-linux-gnu-gcov-tool

aarch64-linux-gnu-gcc-5 aarch64-linux-gnu-gcc-ranlib aarch64-linux-gnu-gcov-tool-5

aarch64-linux-gnu-gcc-ar aarch64-linux-gnu-gcc-ranlib-5 aarch64-linux-gnu-gprof