[bug #64806] "invalid output sync mutex" on windows

[Michael Davidsaver]

URL:
  <https://savannah.gnu.org/bugs/?64806>

                 Summary: "invalid output sync mutex" on windows
                   Group: make
               Submitter: mdavidsaver
               Submitted: Sun 22 Oct 2023 09:38:22 PM UTC
                Severity: 3 - Normal
              Item Group: Bug
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
       Component Version: 4.4.1
        Operating System: MS Windows
           Fixed Release: None
           Triage Status: None


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Follow-up Comments:


-------------------------------------------------------
Date: Sun 22 Oct 2023 09:38:22 PM UTC By: Michael Davidsaver <mdavidsaver>
I have recently found that recursive invocations of make 4.4.1 (from
chocolatey) in the github actions windows-2019 and -2022 images error out
with:


...
  make -C ./configure install
  make: *** invalid output sync mutex: --.  Stop.
  make: *** [configure/RULES_DIRS:85: configure.install] Error 2
...


The exact message differs from run to run.


   make: *** invalid output sync mutex: ���.  Stop.



  make: *** invalid output sync mutex: �*V8�.  Stop.


Our builds were running "make -Otarget ...".  The error message was enough of
a hint that I tried removing the "-Otarget".  This avoids the error.

make with "-Otarget" had been working in this environment for some time, and
as recently as 3 weeks ago.  This continues to do so in the appveyor
environment (today at least).  So this may be connected with an update to the
GHA windows images last week.

for reference: https://github.com/epics-base/ci-scripts/issues/84







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