[bug #47715] Implicit rule defined for multiple targets at once only runs one time

[Tristan Wibberley]

URL:
  <http://savannah.gnu.org/bugs/?47715>

                 Summary: Implicit rule defined for multiple targets at once
only runs one time
                 Project: make
            Submitted by: codeshot
            Submitted on: Sat 16 Apr 2016 01:12:44 PM GMT
                Severity: 3 - Normal
              Item Group: Bug
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
       Component Version: 4.0
        Operating System: POSIX-Based
           Fixed Release: None
           Triage Status: None

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Details:

An implicit rule defined for several targets at once only runs once during any
single make invocation.

This can be seen with the attached Makefile by running `make a/foo.o b/foo.o`

Output:
true
make: Nothing to be done for 'b/foo.o'.

Expected Output:
true
true

Interestingly, `make a/foo.o b/bar.o` produces the expected output.

A critical side effect of this is also that a rule that relies on an implicit
rule can be remade "successfully" even though its prerequisites have not been
updated - which can be confirmed with a more complex makefile.



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File Attachments:


-------------------------------------------------------
Date: Sat 16 Apr 2016 01:12:44 PM GMT  Name: Makefile  Size: 26B   By:
codeshot

<http://savannah.gnu.org/bugs/download.php?file_id=36950>

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