From owner-freebsd-bugs@FreeBSD.ORG Tue Mar 16 03:50:12 2004 Return-Path: Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 880AE16A4D1 for ; Tue, 16 Mar 2004 03:50:12 -0800 (PST) Received: from freefall.freebsd.org (freefall.freebsd.org [216.136.204.21]) by mx1.FreeBSD.org (Postfix) with ESMTP id 5B94643D48 for ; Tue, 16 Mar 2004 03:50:12 -0800 (PST) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1]) i2GBoCbv086805 for ; Tue, 16 Mar 2004 03:50:12 -0800 (PST) (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.12.10/8.12.10/Submit) id i2GBoCmC086804; Tue, 16 Mar 2004 03:50:12 -0800 (PST) (envelope-from gnats) Resent-Date: Tue, 16 Mar 2004 03:50:12 -0800 (PST) Resent-Message-Id: <200403161150.i2GBoCmC086804@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-bugs@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Oliver Eikemeier Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 2516C16A4CE for ; Tue, 16 Mar 2004 03:49:27 -0800 (PST) Received: from postman.arcor.de (newsread1.arcor-online.net [151.189.0.146]) by mx1.FreeBSD.org (Postfix) with ESMTP id 93FCA43D39 for ; Tue, 16 Mar 2004 03:49:26 -0800 (PST) (envelope-from eikemeier@fillmore-labs.com) Received: from fillmore.dyndns.org (port-212-202-51-138.reverse.qsc.de [212.202.51.138]) (authenticated bits=0)i2GBnOck002669 (version=TLSv1/SSLv3 cipher=EDH-RSA-DES-CBC3-SHA bits=168 verify=NO) for ; Tue, 16 Mar 2004 12:49:25 +0100 (MET) Received: from [172.16.0.2] (helo=fillmore-labs.com) by fillmore.dyndns.org with esmtp (Exim 4.30; FreeBSD) id 1B3D4U-000KUl-2G for FreeBSD-gnats-submit@FreeBSD.org; Tue, 16 Mar 2004 12:49:22 +0100 Message-Id: <4056E9C7.10903@fillmore-labs.com> Date: Tue, 16 Mar 2004 12:49:27 +0100 From: Oliver Eikemeier To: FreeBSD-gnats-submit@FreeBSD.org Subject: bin/64327: [PATCH] make(1): document surprising behaviour of assign with expansion X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 Mar 2004 11:50:12 -0000 >Number: 64327 >Category: bin >Synopsis: [PATCH] make(1): document surprising behaviour of assign with expansion >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: change-request >Submitter-Id: current-users >Arrival-Date: Tue Mar 16 03:50:11 PST 2004 >Closed-Date: >Last-Modified: >Originator: Oliver Eikemeier >Release: FreeBSD 4.9-STABLE i386 >Organization: Fillmore Labs - http://www.fillmore-labs.com >Environment: System: FreeBSD nuuk.fillmore-labs.com 4.9-STABLE >Description: Document a surprising behaviour of make(1)s assign with expansion operator, that is apparently inteded but had bitten my at least once. >How-To-Repeat: Try the Makefile from the patch: VAR1:= Assigned with${OUT} expansion VAR2!= echo Assigned with${OUT} expansion OUT= out all: @echo := - ${VAR1} @echo != - ${VAR2} >Fix: diff -u -r1.29.2.15 make.1 --- make.1 17 Dec 2002 19:01:18 -0000 1.29.2.15 +++ make.1 16 Mar 2004 11:12:09 -0000 @@ -1266,6 +1266,17 @@ \&.endfor .Ed won't work, and should be rewritten the other way around. +.Pp +Undefined variables are not expanded when assigned with expansion. +This is intentional, but may lead to surprising results: +.Bd -literal +VAR1:= Assigned with${OUT} expansion +VAR2!= echo Assigned with${OUT} expansion +OUT= out +all: + @echo := - ${VAR1} + @echo != - ${VAR2} +.Ed .Sh SEE ALSO .Xr mkdep 1 , .Xr make.conf 5 >Release-Note: >Audit-Trail: >Unformatted: