** https://www.gnu.org/software/autoconf/[GNU Autoconf]{nbsp}≥{nbsp}2.69
** https://www.gnu.org/software/libtool/[GNU Libtool]{nbsp}≥{nbsp}2.2
** https://github.com/westes/flex[flex]{nbsp}≥{nbsp}2.5.35
- ** https://www.gnu.org/software/bison/bison.html[GNU Bison]{nbsp}≥{nbsp}2.4
+ ** https://www.gnu.org/software/bison/bison.html[GNU Bison]{nbsp}≥{nbsp}2.5
Libraries::
* A C library (for example,