[bug #37703] job starts before dependency

[Koen Van Hoof]

URL:
  <http://savannah.gnu.org/bugs/?37703>

                 Summary: job starts before dependency 
                 Project: make
            Submitted by: kvho
            Submitted on: Fri 09 Nov 2012 02:17:19 PM CET
                Severity: 3 - Normal
              Item Group: Bug
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
       Component Version: 3.82
        Operating System: POSIX-Based
           Fixed Release: None
           Triage Status: None

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Details:

I run make -j.  In a rare case, a jobs starts before its dependency had run.
It happens if a dependency had finished after it has been checked, but before
the update of a target.
With the attached Makefile I could reproduce the problem, but I had to add a
'sleep(1)' in function new_job, before the call to reap_children.
The error is in the attached log.
I have also attached a patch that seem to fix it.



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File Attachments:


-------------------------------------------------------
Date: Fri 09 Nov 2012 02:17:19 PM CET  Name: Makefile  Size: 116B   By: kvho

<http://savannah.gnu.org/bugs/download.php?file_id=26895>
-------------------------------------------------------
Date: Fri 09 Nov 2012 02:17:19 PM CET  Name: reconsider.patch  Size: 735B  
By: kvho

<http://savannah.gnu.org/bugs/download.php?file_id=26896>
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Date: Fri 09 Nov 2012 02:17:19 PM CET  Name: log  Size: 3kB   By: kvho

<http://savannah.gnu.org/bugs/download.php?file_id=26897>

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