[bug #35146] parallel build failure in pdfmark subdir

[G. Branden Robinson]

Update of bug #35146 (project groff):

                Category:                    None => Macro - others/general 
              Item Group:                    None => Build/Installation     
         Planned Release:                    None => 1.22.0                 

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Follow-up Comment #2:


commit 379dab35f750071de19b76d2efdeffc432a3fe72
Author: Werner LEMBERG <wl@gnu.org>
Date:   Mon Dec 26 08:20:53 2011 +0000

    Fix parallel build race failure.
    
    Sometimes building in parallel will fail in the pdfmark directory:
    
      make[2]: Entering directory '.../contrib/pdfmark'
      rm -f pdfroff
      rm -f pdfmark.pdf
      sed -f ... ./pdfroff.sh >pdfroff
      ...; ./pdfroff ... pdfmark.ms >pdfmark.pdf
      /bin/sh: ./pdfroff: Permission denied
      chmod +x pdfroff
      make[2]: *** [pdfmark.pdf] Error 126
    
    This is because the generated pdf files use the local generated
    pdfroff helper script, but they don't depend directly upon it, so
    make tries to create the two in parallel and randomly falls over.
    
    * Makefile.sub: Have all the .pdf files explicitly depend on the
    `pdfroff' helper script.


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