[bug #19226] False warning about a circular dependency

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?19226>

                 Summary: False warning about a circular dependency
                 Project: make
            Submitted by: None
            Submitted on: Mittwoch 07.03.2007 um 09:28 UTC
                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: Any
           Fixed Release: None

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Details:

We are using make 3.81 under CygWin (Windows XP SP2).

I have the following makefile: "test.make":

------------------8<---------------------
VPATH := ../dir/

all: a

.SECONDARY:

a: b b
   @echo "compile"

../dir/b:

------------------8<---------------------

I am getting the following:

$ mkdir ../dir
$ touch ../dir/b
$ make -f test.make
make: Circular a <- b dependency dropped.
compile
$

Of course a depends on b, but why depends b on a?
When only one b is on the a line, the message isn't shown,
when the .SECONDARY: is missing it isn't shown and when
the b file is placed under ./dir the message is also not shown.

Paul Smith (address@hidden) confirmed this for Linux:
| I can confirm this on my Linux box.  It's even stranger
| if you look at the debug output, since make appears to
| try to build "b" right after it considers "all", without
| first considering "a" (according to the output).






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File Attachments:


-------------------------------------------------------
Date: Mittwoch 07.03.2007 um 09:28 UTC  Name: test.make  Size: 86B   By: None

<http://savannah.gnu.org/bugs/download.php?file_id=12138>

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