rk3588 交叉编译链

• 几个寻找的位置: build/envsetup.sh kernel/makefile ./build.sh

build/envsetup.sh和kernel/makefile中都没有明确的位置，那么可以确定编译时指定的交叉编译链路径是由./build.sh引入的，查看./build.sh有：

function build_check_cross_compile(){

	case $RK_ARCH in
	arm|armhf)
		if [ -d "$TOP_DIR/prebuilts/gcc/linux-x86/arm/gcc-arm-10.3-2021.07-x86_64-arm-none-linux-gnueabihf" ]; then
			CROSS_COMPILE=$(realpath $TOP_DIR)/prebuilts/gcc/linux-x86/arm/gcc-arm-10.3-2021.07-x86_64-arm-none-linux-gnueabihf/bin/arm-linux-gnueabihf-
		export CROSS_COMPILE=$CROSS_COMPILE
		fi
		;;
	arm64|aarch64)
		if [ -d "$TOP_DIR/prebuilts/gcc/linux-x86/aarch64/gcc-arm-10.3-2021.07-x86_64-aarch64-none-linux-gnu" ]; then
			CROSS_COMPILE=$(realpath $TOP_DIR)/prebuilts/gcc/linux-x86/aarch64/gcc-arm-10.3-2021.07-x86_64-aarch64-none-linux-gnu/bin/aarch64-none-linux-gnu-
		export CROSS_COMPILE=$CROSS_COMPILE
		fi
		;;
	*)
		echo "the $RK_ARCH not supported for now, please check it again\n"
		;;
	esac
}

那么可以确定ARM64的交叉编译器路径为 /prebuilts/gcc/linux-x86/aarch64/gcc-arm-10.3-2021.07-x86_64-aarch64-none-linux-gnu/bin/aarch64-none-linux-gnu-