PKG_CONFIG_SYSROOT_DIR=/opt/cross/sysroot
PKG_CONFIG_PATH=
PKG_CONFIG_LIBDIR=/opt/cross/sysroot/usr/lib/aarch64-linux-gnu/pkgconfig
CC=aarch64-linux-gnu-gcc --sysroot=/opt/cross/sysroot
CXX=aarch64-linux-gnu-g++ --sysroot=/opt/cross/sysroot