tar zxvf mpich2-1.5.tar.gz
cd mpich2-1.5
./configure --prefix=/path/to/mpich --enable-shared=yes --build=aarch64-unknown-linux-gnu make -j make -j install
export PATH=/path/to/mpich/bin:$PATH export LD_LIBRARY_PATH=/path/to/mpich/lib:$LD_LIBRARY_PATH