This is flex, the fast lexical analyzer.

Read the file "INSTALL" for general installation directives.  Peek near
the beginning of the file "Makefile.in" for special DEFS values.  On most
systems, you can just run the "configure" script and type "make" to build
flex; then "make check" to test whether it built correctly; and if it did,
then "make install" to install it.

If you're feeling adventurous, you can also issue "make bigcheck" (be
prepared to wait a while).

Note that flex is distributed under a copyright very similar to that of
BSD Unix, and not under the GNU General Public License (GPL).

Please send bug reports and feedback to help-flex@gnu.org.

The flex distribution contains the following files of interest:

README - This file

NEWS - Differences between the various releases

INSTALL - basic installation information

COPYING - flex's copyright and license

flex.1, flex.texi - user documentation

examples/ - containing examples of some possible flex scanners and a
few other things. See the file examples/README for more details.

TODO, to.do/ - outstanding bug reports, desired features, etc.

faqs/ - frequently asked questions

misc/ - assorted files which may be of interest when building flex on
platforms other than *nix ones. See misc/README for more information