Hi Lennart, At 2024-03-19T17:30:20+0000, Lennart Jablonka wrote: > Quoth G. Branden Robinson: > > Popping the stack from history, I cannot reproduce this problem building > > on OpenBSD 7.4. Bison is installed and found by groff's configure > > script. It's not my machine; I don't have superuser privileges. > > Yes, it works using bison. Even without root access, you can use > OpenBSD’s yacc: Delete src/preproc/eqn/eqn.cpp and re-run configure > with ac_cv_prog_YACC=/usr/bin/yacc set.
Thanks. More time with the Autoconf manual might benefit me...
> > Further, eqn.ypp says this, grabbing the "config.h" header file that
> > gnulib demands so ubiquitously:
> >
> > %{
> > #ifdef HAVE_CONFIG_H
> > #include <config.h>
> > #endif
> >
> > #include <stdio.h>
> > #include <string.h>
> > #include <stdlib.h>
> >
> > #include "lib.h"
> > #include "box.h"
> > extern int non_empty_flag;
> > int yylex();
> > void yyerror(const char *);
> > %}
>
> Yes, but do look at yacc’s output, eqn.cpp. Using OpenBSD’s yacc, eqn.cpp
> starts with this:
>
> #include <stdlib.h>
> #include <string.h>
> #define YYBYACC 1
> #define YYMAJOR 1
> #define YYMINOR 9
> #define YYLEX yylex()
> #define YYEMPTY -1
> #define yyclearin (yychar=(YYEMPTY))
> #define yyerrok (yyerrflag=0)
> #define YYRECOVERING() (yyerrflag!=0)
> #define YYPREFIX "yy"
> #line 19 "src/preproc/eqn/eqn.ypp"
> #ifdef HAVE_CONFIG_H
> #include <config.h>
> #endif
>
> #include <stdio.h>
> #include <string.h>
> #include <stdlib.h>
>
> #include "lib.h"
> #include "box.h"
> extern int non_empty_flag;
> int yylex();
> void yyerror(const char *);
Okay, yes, I can confirm this output and the failure.
It appears to me that byacc is just not playing nicely with Autoconf
here. And maybe not with other tools, since it's _assuming_ that the
output will require stdlib.h and string.h. (Its own boilerplate code
indeed might, but its aggression here has clear negative consequences.)
I don't see a path forward here except documenting that OpenBSD's byacc
is not usable for repo builds. (Since we ship eqn.[ch]pp in
distribution archives, the impact on most users sourcing their groff
from GNU should be small.)
What do you think?
Regards,
Branden
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