- **GNU Autotools** (**Automake >= 1.10**, **Autoconf >= 2.64**,
**Autoheader >= 2.50**; make sure your system-wide `automake` points
- to a recent version!)
+ to a recent version)
- **[GNU Libtool](http://www.gnu.org/software/autoconf/) >= 2.2**
- **Flex >= 2.5.35**
- **Bison >= 2.4**