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

[G. Branden Robinson]

Update of bug #59958 (project groff):

                  Status:             In Progress => Fixed                  
             Open/Closed:                    Open => Closed                 
         Planned Release:                    None => 1.23.0                 

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Follow-up Comment #4:


commit 362077eeb4abfd0b21416c093d32e4754d975731
Author: G. Branden Robinson <g.branden.robinson@gmail.com>
Date:   Sat Jan 30 05:23:46 2021 +1100

    tmac/tmac.am: Remove unidiomatic for loop.
    
    * tmac/tmac.am ($(TMACSTRIPFILES)):
      ($(TMACMDOCSTRIPFILES)): Remove unidiomatic for loop which frustrated
      parallel make operation.
    
    Thanks to an anonymous contributor for the report and patch.
    
    Fixes <https://savannah.gnu.org/bugs/?59958>.
    
    The bug report characterizes the for loop as a "race", which I don't
    think is strictly correct, since the outcome of the work done is not
    subject to variation.  The body of the for loop is a clobbering shell
    redirection operator, so the problem was one of potential pointless
    repetition of work in concurrent operation.  Good to fix, but not a
    cause for alarm.
    
    Problem dates back to 2609cfb727a98809548edfd721c5cb923085b24b, 6
    September 2014.


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