[bug #60604] m4/groff.m4: GROFF_URW_FONTS_CHECK: stale URL

[G. Branden Robinson]

Follow-up Comment #5, bug #60604 (project groff):

Hi Dave,

[comment #3 comment #3:]
> Branden, do you have an opinion on the related issue brought up in bug
#55300?  I don't know whether Ghostscript is required; I've never
installed/run groff on a system without it.

Ghostscript appears to be optional, but our configure script does gripe pretty
hard if it's not found.


configure: WARNING: missing program:

  The program
     'gs'
  cannot be found in the PATH.
  Consequently, groff's HTML backend (grohtml) will not work properly;
  therefore, it will neither be possible to prepare, nor to install,
  documentation in HTML format.
     
configure: WARNING: missing program:

  The program 'gs' cannot be found in the PATH.
  Consequently, groff's PDF formatter (pdfroff) will not work properly;
  therefore, it will neither be possible to prepare, nor to install,
  documentation and most of the examples in PDF format.


One will also likely get the squawkage discussed in this ticket.


configure:
  No URW fonts in Type 1/PFB format were found on your system; URW font
  generation for groff's 'gropdf' output driver will not work properly.
  You can obtain the URW base 35 fonts from their GitHub project.

  As of this writing (2021-05-15), you can find them in the 'fonts'
  directory of the following archives (choose one).

    https://github.com/ArtifexSoftware/urw-base35-fonts/archive/refs/
      tags/20200910.zip
    https://github.com/ArtifexSoftware/urw-base35-fonts/archive/refs/
      tags/20200910.tar.gz

  You may wish to check for a newer release.

    https://github.com/ArtifexSoftware/urw-base35-fonts/releases

  By default, groff will look for these fonts in the search path shown
  by the 'gs -h' command and in the two directories
    /usr/share/fonts/type1/gsfonts/
  and
    /opt/local/share/fonts/urw-fonts/
  (these locations are specified in font/devpdf/Foundry.in).  You will
  need to re-run the 'configure' script after installing these fonts.

  Alternatively, you can pass the option '--with-urw-fonts-dir=DIR'
  to 'configure' to look for them in the directory DIR you specify.


Quasi-relatedly, IIRC a few days ago Werner pointed out that we should add a
versioned check for Ghostscript so we can steer people to the left-pointing
hand glyph bugfix, which recently made it into a GS release.

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