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[bug #45477] cygwin: regression in VPATH handling.

From: marco atzeri
Subject: [bug #45477] cygwin: regression in VPATH handling.
Date: Sun, 05 Jul 2015 20:54:41 +0000
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:39.0) Gecko/20100101 Firefox/39.0


                 Summary: cygwin: regression in VPATH handling.
                 Project: make
            Submitted by: matzeri
            Submitted on: Sun 05 Jul 2015 08:54:40 PM GMT
                Severity: 3 - Normal
              Item Group: Bug
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
       Component Version: 4.1
        Operating System: MS Windows
           Fixed Release: None
           Triage Status: None



First reported on:

make cygwin package is using unpatched source code.

-- original message ----
This version of make introduces a regression in VPATH handling.

Bash uses VPATH = .:/path/to/sources

to specify a two-directory VPATH.  Technically, the .: is redundant
(because make will automatically search the current directory before
resorting to VPATH rules), but that hasn't stopped bash from using it
anyways.  (Most automake-based packages only use a one-directory VPATH
designation; but bash doesn't use automake)

The old version of make properly handled this as two directories; but
the new version of make is apparently treating it as a drive letter
directive and failing to look in /path/to/sources.

If I change bash to emit:

VPATH = . /path/to/sources

then things work again.  Likewise if I change it to omit the redundant
leading '.:'.  So I can work around the regression in the meantime.


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