[bug #28983] forcing a target matching a pattern rule shadows the rule's actions

[Ilguiz Latypov]

URL:
  <http://savannah.gnu.org/bugs/?28983>

                 Summary: forcing a target matching a pattern rule shadows
the rule's actions
                 Project: make
            Submitted by: ilgiz
            Submitted on: Mon 22 Feb 2010 03:35:05 PM EST
                Severity: 3 - Normal
              Item Group: Bug
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
       Component Version: 3.81
        Operating System: MS Windows
           Fixed Release: None
           Triage Status: None

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Details:


With the makefile piece below I could get file.o only once.  If I remove it
from the file system, the .PHONY rule seems to shadow the pattern rule.  I
could not find a stipulation justifying this behavior in the GNU make
documentation.  Using a Cygwin build 3.81-2 here.

=====================================================
default: file.o

.PHONY: file.o

file.c:
        echo Auto-generating "$@"...
        touch "$@"

%.o: %.c
        echo Making "$@" from "$^"...
        touch "$@"

=====================================================

$ make -f force-build-of-a-target-matching-a-pattern-rule.mak
echo Auto-generating "file.c"...
Auto-generating file.c...
touch "file.c"
echo Making "file.o" from "file.c"...
Making file.o from file.c...
touch "file.o"

$ rm file.o

$ make -f force-build-of-a-target-matching-a-pattern-rule.mak
make: Nothing to be done for `default'.





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