Re: [Flex-help] lex/yacc/gcc help (RESOLVED)

[Mark Hounschell]

On 11/06/2013 07:57 AM, Mark Hounschell wrote:
> On 11/06/2013 03:19 AM, Akim Demaille wrote:
> > Le 5 nov. 2013 ? 14:11, Mark Hounschell <address@hidden> a »crit :
> >
> > > Thanks Akim,
> >
> > Hi!
> >
> > > Like I said in my original post, I am yacc/lex ignorant. The strange thing, 
> > > that I haven't mentioned is that this all built successfully 4, 5, or more 
> > > years ago on Linux.
> >
> > I would not have expected that, given what you sent.
> >
> > > I was recently able to find that executable that I had checked into CVS those 
> > > years back and it works. I also found some notes of what I originally had to do 
> > > to get it to build. All I had to do back then was:
> > >
> > > 1. Changed all ocurrances of yylval.ntype
> > >                            to yylval.nvaltype.ntype
> > > 2. Changed all occurances of yylval.nval
> > >                            to yylval.nvaltype.nval
> > >
> > > 3. Changed all occurances of yybgin to yy_start
> > >
> > > 4. Changed all occurrences of "k =/ 10" to "k /= 10"
> >
> > Wow, that piece of software _is_ old!  Could you tell us what
> > it is?
>
> It's a micro code assembler for a legacy CPU boards micro engine. It is
> an early 80s generation CPU board. From back in the days when powerfull
> CPUs were not yet on a chip. I still repair these boards and often a
> micro diagnostic has to be modified to create tight scope loops. The
> peice of software I'm trying to build creates the assembler used to
> compile the micros and firmware for this board. There was a time this
> peice of software was "Company private". That was long ago though. I
> would have no problem providing the code if it would help me get it to
> build again?
>
> > > As far as including the whole scanner in the yacc file, the y.tab.c file does 
> > > include the lex file but at the very end of it. After this BEGIN shows up.
> >
> > BEGIN is a macro, so it must be #defined before it is
> > used.
> >
> > > I assume lex.yy.c is the whole scanner?
> >
> > Yes, that's what I meant.
> >
> > > And I also assume you mean trying to include it before the BEGIN?
> >
> > To include it before the body of the parser.  You'll have to find
> > the right place, as the scanner certainly also wants to "see" things
> > from the parser, such as YYSTYPE I guess.
>
> Since I don't remember what version of SuSE Linux I used when it
> actually did built right, I might just get out all my old dist CDs and
> see if I can pin down the versions that did work.
>
> Regards
> Mark

I have determined it was SuSE-8.2 that the working executable was built 
on. Verified by installing a SuSE-8.2 system and it builds just fine.

SuSE-8.2 has the following revisions of software

#rpm -q gcc glibc yacc flex bison
gcc-3.3-23
glibc-2.3.2-6
yacc-91.7.30-663
flex-2.5.4a-97
bison-1.75-39

What I've found is lex/flex is NOT the problem at all. The problem is 
bison -y is NOT doing the same thing yacc does. On the 8.2 system the 
makefile specifies "YACC = yacc". If I change it to "YACC = bison -y", I 
get the same failure I do on the current system.

But, I found a package called byacc. Using this instead of "bison -y" or 
"yacc" has fixed my problem.

Back on SuSE-8.2 yacc was it's own package. I guess when yacc and bison 
were combined someone had the insight to still provide the original yacc 
package as byacc.

I'm happy...

Mark