[bug #59958] race in Makefile at generation of e.tmac and doc.tmac with bigger than -j1 eg. -j4

[anonymous]

URL:
  <https://savannah.gnu.org/bugs/?59958>

                 Summary: race in Makefile at generation of e.tmac and
doc.tmac with bigger than -j1 eg. -j4
                 Project: GNU troff
            Submitted by: None
            Submitted on: Thu 28 Jan 2021 03:48:55 AM UTC
                Category: None
                Severity: 3 - Normal
              Item Group: Build/Installation
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None

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Details:

patch attached, it's self-evident now.

nobody should be affected if '>' bash operator works as expected, I guess. The
only question is, what does '>' do if it happens in parallel to the same file
?

maybe if the file is big enough, it would overwrite some contents...

My '>' had O_APPEND in addition, so it only added to it, in effect increasing
e.tmac and doc.tmac file sizes when make -j4 (not -j1) was used.



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File Attachments:


-------------------------------------------------------
Date: Thu 28 Jan 2021 03:48:55 AM UTC  Name: groff_fix_tmac_race.patch  Size:
596B   By: None

<http://savannah.gnu.org/bugs/download.php?file_id=50797>

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