[bug #62088] Avoid re-exec due to stdin

[Dmitry Goncharov]

URL:
  <https://savannah.gnu.org/bugs/?62088>

                 Summary: Avoid re-exec due to stdin
                 Project: make
            Submitted by: dgoncharov
            Submitted on: Sun 20 Feb 2022 01:26:47 PM UTC
                Severity: 3 - Normal
              Item Group: Bug
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
       Component Version: SCM
        Operating System: None
           Fixed Release: None
           Triage Status: None

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Details:

A user reported the following

"Noticed the regression on lowdown-0.10.0 upstream package.

Here is a complete trigger:

    $ printf 'all:\n\techo $(CC)' | make -sf -

[good] GNU make 4.3 works as expected:

    $ printf 'all:\n\techo $(CC)' | make -sf -
    cc

[bad] GNU make from git loops indefinitely in re-execution:

    $ printf 'all:\n\techo $(CC)' | ./make -sf -
    <hung>

Curiously space separation workaround is enough to
get the result:

    $ printf 'all:\n\techo $(CC)' | ./make -s -f -
    cc

Bitsect points at commit 7c4e6b0299 "[SV 60595] Restart
whenever any makefile is rebuilt"."

The original bug report is here
https://lists.gnu.org/archive/html/bug-make/2022-02/msg00037.html.




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