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/****************************************************************
Copyright (C) AT&T and Lucent Technologies 1996
All Rights Reserved
Permission to use, copy, modify, and distribute this software and
its documentation for any purpose and without fee is hereby
granted, provided that the above copyright notice appear in all
copies and that both that the copyright notice and this
permission notice and warranty disclaimer appear in supporting
documentation, and that the names of AT&T or Lucent Technologies
or any of their entities not be used in advertising or publicity
pertaining to distribution of the software without specific,
written prior permission.
AT&T AND LUCENT DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS. IN NO EVENT SHALL AT&T OR LUCENT OR ANY OF THEIR
ENTITIES BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE
USE OR PERFORMANCE OF THIS SOFTWARE.
****************************************************************/
This is the version of awk described in "The AWK Programming Language",
by A. V. Aho, B. W. Kernighan, and P. J. Weinberger
(Addison-Wesley, 1988, ISBN 0-201-07981-X).
Changes, mostly bug fixes and occasional enhancements, are listed
in FIXES. If you distribute this code further, please please please
distribute FIXES with it. If you find errors, please report them
to bwk@bell-labs.com. Thanks.
The program itself is created by
make
which should produce a longish sequence of messages roughly like this:
yacc -d awkgram.y
conflicts: 43 shift/reduce, 85 reduce/reduce
mv y.tab.c ytab.c
mv y.tab.h ytab.h
cc -O -c ytab.c
cmp -s ytab.h prevytab.h || (cp ytab.h prevytab.h; echo change maketab)
change maketab
cc -O -c b.c
cc -O -c main.c
cc -O -c parse.c
cc -O maketab.c -o maketab
./maketab >proctab.c
cc -O -c proctab.c
cc -O -c tran.c
cc -O -c lib.c
cc -O -c run.c
lex awklex.l
mv lex.yy.c lexyy.c
cc -O -c lexyy.c
cc -O ytab.o lexyy.o b.o main.o parse.o proctab.o tran.o lib.o run.o -lm
This produces an executable a.out; you will eventually
want to move this to some place like /usr/bin/awk.
If your system is missing some of the components, e.g., yacc or lex,
you should be able to compile the pieces manually. We have included
yacc output in ytab.c and ytab.h, and lex output in lexyy.c.
NOTE: This version uses ANSI C, as you should also.
The version of malloc that comes with some systems (e.g., IRIX) is
astonishly slow. If awk seems slow, you might try fixing that.
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