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早期freebsd实现

This is release 2.4 of flex.  See "version.h" for the exact patch-level.

See the file "NEWS" to find out what is new in this Flex release.

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), except for
the "configure" script, which is covered by the GPL.

Many thanks to the 2.4 pre-testers for finding a bunch of bugs and helping
increase/test portability: Francois Pinard, Nathan Zelle, Gavin Nicol,
Chris Thewalt, and Matthew Jacob.

Please send bug reports and feedback to:

	Vern Paxson
	ICSD, 46A/1123
	Lawrence Berkeley Laboratory
	1 Cyclotron Rd.
	Berkeley, CA 94720

	[e-mail]


The flex distribution consists of the following files:

	README		This message

	NEWS		Differences between the various releases

	INSTALL		General installation information

	COPYING		flex's copyright

	configure.in, configure, Makefile.in, install.sh, mkinstalldirs
			elements of the "autoconf" auto-configuration process

	flexdef.h, parse.y, scan.l, ccl.c, dfa.c, ecs.c, gen.c, main.c,
	misc.c, nfa.c, sym.c, tblcmp.c, yylex.c	 
			source files

	version.h	version of this flex release

	flex.skl	flex scanner skeleton
	mkskel.sh	script for converting flex.skl to C source file skel.c

	liballoc.c
	libmain.c	flex library (-lfl) sources
	libyywrap.c

	initscan.c	pre-flex'd version of scan.l

	FlexLexer.h	header file for C++ lexer class

	flexdoc.1	full user documentation
	flex.1		reference documentation

	MISC/		a directory containing miscellaneous contributions.
			See MISC/README for details.