Slackware Current updated to flex-2.6.3.
https://forums.sifive.com/t/arch-linux-and-the-hifive1/212 https://github.com/riscv/riscv-gnu-toolchain/issues/212 http://stackoverflow.com/questions/1811125/undefined-reference-to-yywrap https://github.com/dangerousben/jsonval/issues/5