1BR2_TOOLCHAIN_EXTERNAL=y 2BR2_TOOLCHAIN_EXTERNAL_CUSTOM=y 3BR2_TOOLCHAIN_EXTERNAL_PATH="$(TOPDIR)/../prebuilts/gcc/linux-x86/arm/gcc-arm-8.3-2019.03-x86_64-arm-linux-gnueabihf" 4BR2_TOOLCHAIN_EXTERNAL_CUSTOM_PREFIX="arm-linux-gnueabihf" 5BR2_TOOLCHAIN_EXTERNAL_GCC_8=y 6BR2_TOOLCHAIN_EXTERNAL_HEADERS_4_19=y 7BR2_TOOLCHAIN_EXTERNAL_CUSTOM_GLIBC=y 8BR2_TOOLCHAIN_EXTERNAL_CXX=y 9BR2_TOOLCHAIN_EXTRA_EXTERNAL_LIBS="libgomp.so" 10