URL:
<http://savannah.gnu.org/bugs/?31087>
Summary: .SECONDEXPANSION: of $$< expands to target in
pattern prerequisites
Project: make
Submitted by: None
Submitted on: Mon 20 Sep 2010 05:26:25 PM UTC
Severity: 3 - Normal
Item Group: Bug
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Discussion Lock: Any
Component Version: 3.82
Operating System: Any
Fixed Release: None
Triage Status: None
_______________________________________________________
Details:
The following command line session describes and demonstrates
the issue. It is from Ubuntu x86_64, but probably the behavior
is platform-independent.
-- John Carey
> cat /etc/issue
Ubuntu 8.04.4 LTS \n \l
> make --version
GNU Make 3.82
Built for i686-pc-linux-gnu
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
> ls -1
Makefile
> cat Makefile
# "$$<" expands to "target", even though we
# are not actually invoking a .DEFAULT rule.
# It should expand to the empty string.
.SECONDEXPANSION:
all : target
tar%: p$$< ; @echo '$@' from '$+'
p% : ;
> make
target from ptarget
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