Re: [PATCH] Provide papersize for refcard.dvi

[Vincent Lefevre <vincent@vinc17.net>]

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On 2025-08-08 19:15:07 +0300, Eli Zaretskii wrote:
> > Date: Thu, 07 Aug 2025 12:55:20 +0300
> > From: Eli Zaretskii <eliz@gnu.org>
> > Cc: gdb-patches@sourceware.org
> > 
> > > Date: Thu, 7 Aug 2025 11:05:24 +0200
> > > From: Vincent Lefevre <vincent@vinc17.net>
> > > Cc: gdb-patches@sourceware.org
> > > 
> > > On 2025-08-07 08:50:14 +0300, Eli Zaretskii wrote:
> > > > That's true, but there are TeX experts there.  If you know of a better
> > > > place, we could discuss this there.  I unfortunately don't know enough
> > > > about this to make a decision about the right solution.
> > > 
> > > FYI, the TeX Users Group has mailing-lists:
> > > 
> > >   https://tug.org/mailman/listinfo
> > > 
> > > texhax seems to be the one for general TeX questions.
> > 
> > Thanks, posted a question there.
> 
> Given the responses there, can you post (and hopefully test) an
> improved patch?

Note: my old patch was based on what was done in PARI.

I've attached a new patch. It still uses \ifx\pdfoutput\undefined
because the suggested \ifnum\pdfoutput<1 gives an error.

For dvi and pdf, I could not see any issue.

For ps, I get with "make refcard.ps":

  DVIPS    refcard.ps
dvips: both landscape and papersize specified:  ignoring landscape

The dvips message is due to the "-t landscape" in the Makefile
(from Makefile.in):

refcard.ps : refcard.dvi
        $(ECHO_DVIPS) $(DVIPS) $(SILENT_Q_FLAG) -t landscape -o $@ $?

It is just redundant and could possibly be useful in case the \special
isn't recognized in some settings, but you may choose to remove this
option. In both cases, there are no issues with "gv refcard.ps".

-- 
Vincent Lefèvre <vincent@vinc17.net> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / Pascaline project (LIP, ENS-Lyon)

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diff --git a/gdb/doc/refcard.tex b/gdb/doc/refcard.tex
index 8a402620bcc..8c0ae2f6951 100644
--- a/gdb/doc/refcard.tex
+++ b/gdb/doc/refcard.tex
@@ -96,7 +96,9 @@
 \vmargin=.25in      % vertical margin width
 \secskip=1pc        % space between refcard secs
 \lskip=2pt          % extra skip between \sec entries
-\ifx\pdfoutput\undefined\else   % check if we are using pdfTeX
+\ifx\pdfoutput\undefined
+  \special{papersize=\the\totalwidth,\the\totalheight}% for dvi output
+\else               % pdfTeX
   \pdfpagewidth=\totalwidth     % width of paper in pdf output
   \pdfpageheight=\totalheight   % height of paper in pdf output
 \fi