NetBSD Problem Report #4778

Received: (qmail 1284 invoked from network); 5 Jan 1998 13:01:36 -0000
Message-Id: <199801051301.IAA13207@Twig.Rodents.Montreal.QC.CA>
Date: Mon, 5 Jan 1998 08:01:04 -0500 (EST)
From: der Mouse  <mouse@Rodents.Montreal.QC.CA>
Reply-To: mouse@Rodents.Montreal.QC.CA
To: gnats-bugs@gnats.netbsd.org
Subject: make .if empty() breaks with .for formal
X-Send-Pr-Version: 3.95

>Number:         4778
>Category:       toolchain
>Synopsis:       make .if empty() breaks with .for formal
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    toolchain-manager
>State:          closed
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Mon Jan 05 05:05:02 +0000 1998
>Closed-Date:    Sun Dec 21 21:19:58 +0000 2008
>Last-Modified:  Sun Dec 21 21:19:58 +0000 2008
>Originator:     der Mouse
>Release:        1.3
>Organization:
	Dis-
>Environment:
	NetBSD/sparc on a SS1+
>Description:
	make(1)'s .if empty() directive breaks when used to test a
	(modified form of a) loop formal of a .for loop; make reacts as
	though the loop formal were undefined.  (The "Malformed
	conditional" error below is the same error I get when I apply
	.if empty() to an undefined variable.)
>How-To-Repeat:
	% cat z
	FOO != echo x; echo FLARP is $(FLARP) 1>&2
	.for x in $(FLARP)
	.if empty(x:E:Na)
	FOO != echo x; echo the .if is true 1>&2
	.else
	FOO != echo x; echo the .if is false 1>&2
	.endif
	.endfor
	% make -f z FLARP='foo.a bar.so'
	FLARP is foo.a bar.so
	"z", line 1: Malformed conditional (empty(x:E:Na))
	"z", line 1: Missing dependency operator
	the .if is true
	"z", line 3: if-less else
	"z", line 3: Need an operator
	the .if is false
	"z", line 5: if-less endif
	"z", line 5: Need an operator
	"z", line 1: Malformed conditional (empty(x:E:Na))
	"z", line 1: Missing dependency operator
	the .if is true
	"z", line 3: if-less else
	"z", line 3: Need an operator
	the .if is false
	"z", line 5: if-less endif
	"z", line 5: Need an operator
	Fatal errors encountered -- cannot continue
	% diff z z2
	3c3,4
	< .if empty(x:E:Na)
	---
	> BAR := $(x:E:Na)
	> .if empty(BAR)
	% make -f z2 FLARP='foo.a bar.so'
	FLARP is foo.a bar.so
	the .if is true
	the .if is false
	make: no target to make.
	% 
>Fix:
	I suspect that .for loops are implemented by constructing
	transient makefile segments consisting of the body with the
	iteration variable substituted out, which would explain several
	oddities I've seen, including this bug.  If so, about the only
	hope is a reimplementation of .for, though in the interim it
	would probably be a workable substitute to splatter warnings
	all over the man page that .for loop formals do not work as
	empty() arguments (and other such situations, if any).

					der Mouse

			       mouse@rodents.montreal.qc.ca
		     7D C8 61 52 5D E7 2D 39  4E F1 31 3E E8 B3 27 4B
>Release-Note:
>Audit-Trail:
Responsible-Changed-From-To: bin-bug-people->toolchain-manager 
Responsible-Changed-By: gnats 
Responsible-Changed-When: Tue Feb 12 00:51:46 PST 2002 
Responsible-Changed-Why:  
There is now a "toolchain-manager" which is the proper default role 
account for handling problem reports in the toolchain category. 

State-Changed-From-To: open->closed
State-Changed-By: dsl@NetBSD.org
State-Changed-When: Sun, 21 Dec 2008 21:19:58 +0000
State-Changed-Why:
Fixed!


>Unformatted:

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