[bug #35248] When running in debug-mode (-d), make reports a strange `multiple target patterns' error

[Mikhail T.]

URL:
  <http://savannah.gnu.org/bugs/?35248>

                 Summary: When running in debug-mode (-d), make reports a
strange `multiple target patterns' error
                 Project: make
            Submitted by: kot
            Submitted on: Thu 05 Jan 2012 08:31:18 PM GMT
                Severity: 3 - Normal
              Item Group: Bug
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
       Component Version: 3.82
        Operating System: None
           Fixed Release: None
           Triage Status: None

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Details:

Hello!

I'm working on a fairly convoluted set of makefiles and thought, using the -d
flag will help me.

Unfortunately, with this flag make began to through an error, that does not
appear, when make is run normally:

../../../coreconf/rules.mk:327: *** multiple target patterns.  Stop.

Having modified the source (read.c) as per the attached patch, I now get more
details:

*** FreeBSD8.2_OPT.OBJ/nssver.o
*** FreeBSD8.2_OPT.OBJ/utilwrap.o
*** FreeBSD8.2_OPT.OBJ/nss.def
*** ../certhigh/GNU
*** ../certhigh/Make
*** ../certhigh/3.82
*** ../certhigh/Built
*** ../certhigh/for
*** ../certhigh/amd64-portbld-freebsd8.2
*** ../certhigh/Copyright
*** ../certhigh/(C)
*** ../certhigh/2010
*** ../certhigh/Free
*** ../certhigh/Software
*** ../certhigh/Foundation,
*** ../certhigh/Inc.
*** ../certhigh/License
*** ../certhigh/GPLv3+
gmake[2]: Entering directory
`/home/ports/security/nss/work/nss-3.13.1/mozilla/security/nss/lib/nss'
../../../coreconf/rules.mk:327: *** FreeBSD8.2_OPT.OBJ/nssinit.o: multiple
target patterns.  Stop.

In other words, it seems, make somehow misinterprets the comments-section of a
Makefile... Using valgrind does not reveal any errors (except 4 "leaked"
bytes).

make-3.81 has a similar problem, but it manifests itself differently. Instead
of complaining about "multiple target patterns", make attempts to build bogus
targets like:

Live child 0x28337ca0 (../certhigh/2006) PID 92047 
Live child 0x28322b80 (../certhigh/(C)) PID 92046 
Live child 0x28337a90 (../certhigh/Copyright) PID 92045 
Live child 0x283378b0 (../certhigh/3.81) PID 92043 
Live child 0x283376d0 (../certhigh/Make) PID 92042 
Live child 0x28337220 (../certhigh/GNU) PID 92041 

This may very well be due to something being wrong with the makefiles, but
make's reaction should not differ depending on the debug flag...



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File Attachments:


-------------------------------------------------------
Date: Thu 05 Jan 2012 08:31:18 PM GMT  Name: patch-patterns-debug  Size: 889B 
 By: kot
Make the `multiple target patterns' error easier to debug
<http://savannah.gnu.org/bugs/download.php?file_id=24746>

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