topic Re: What is yacc in Operating System - HP-UX

What is yacc

Cai Nan — Sat, 26 Jan 2002 06:02:12 GMT

Hi,all.
I use HP10.20,when successfuly finished ./configure wu-ftp-2.6.2, I make,but get following error message:
*****************************
Make: Cannot load yacc. Stop.

What is yacc and where is it in the system?

Thanks!
--Frank

Re: What is yacc

Pal Szabo_1 — Sat, 26 Jan 2002 10:17:36 GMT

Hi!

Yacc is an LALR(1) parser generator.Yacc can accept any input specification that conforms to the AT&T
Yacc documentation.
It reads the grammar specification and generates an LR(1) parser for it. The parsers consist of a set of LALR(1) parsing tables and a driver
routine in C (y.tab.c)

I found a new version:
http://hpux.asknet.de/hppd/hpux/Languages/byacc-3.0/

It is a Berkeley yacc, and it is compatible with AT&T yacc.

It isnt part of the operating system.May you configure script use it.

Re: What is yacc

Steven Sim Kok Leong — Sat, 26 Jan 2002 11:33:37 GMT

Hi,

In case you are wondering what it stands for,

YACC = Yet Another Compiler Compiler

Hope this helps. Regards.

Steven Sim Kok Leong

Re: What is yacc

harry d brown jr — Sat, 26 Jan 2002 14:06:10 GMT

Frank,

When I think of yacc, I have visions of a salesperson running their mouth about some product that I really don't want or need:

yacc, yacc, yacc :-))

if you do a google search for "examples yacc", you'll find a lot of stuff on it.

live free or die
harry

Re: What is yacc

A. Clay Stephenson — Sat, 26 Jan 2002 17:20:26 GMT

Hi:

As mentioned yacc is a compiler generator. You set a series of rules (myfile.y) and yacc will produce a parser. There is also another piece called lex whose job is to identify symbols. You don't get these unless you purchase sort sort of developer's bundle. You can also install the freely available Gnu versions.

Re: What is yacc

A. Clay Stephenson — Sat, 26 Jan 2002 22:37:17 GMT

Hi:

I suppose I should have told you that the Gnu version of yacc is called 'bison' and is available for download at: http://hpux.connect.org.uk/hppd/hpux/Gnu/bison-1.29d/