USE_SUDO="sudo" JOBS="10" LINUX_VER="git" BUILD_ROOT="${PWD}" TOOLCHAIN_ROOT="" BUILD_BINUTILS="${BUILD_ROOT}/build-binutils" BUILD_GCC_S1="${BUILD_ROOT}/build-gcc-s1" BUILD_GCC_S2="${BUILD_ROOT}/build-gcc-s2" BUILD_GLIBC_S1="${BUILD_ROOT}/build-glibc-s1" BUILD_GLIBC_S2="${BUILD_ROOT}/build-glibc-s2" BUILD_QEMU="${BUILD_ROOT}/build-qemu" ARCH="riscv" BITS="64" TAG="_1" ABI="lp64" ISA="rv64g" TARGET="${ARCH}${BITS}-unknown-linux-gnu" LIB_HEADER="linux.h" BUILD_LINUX_ARCH=$ARCH BUILD_LINUX="${BUILD_ROOT}/linux-${LINUX_VER}" BUILD_LINUX_HEADERS="${BUILD_ROOT}/build-${TARGET}-linux-headers" PREFIX="${TOOLCHAIN_ROOT}/opt/${ARCH}${BITS}${TAG}" SYSROOT="${PREFIX}/sysroot" PATH="${PREFIX}/bin:${PATH}"