Date: Tue, 4 Apr 2006 17:26:12 -0400 From: Jung-uk Kim <jkim@FreeBSD.org> To: freebsd-stable@FreeBSD.org Cc: Lars Eighner <eighner@io.com> Subject: Re: Is Makefile.inc1 in 6 wrong? Message-ID: <200604041726.17120.jkim@FreeBSD.org> In-Reply-To: <20060404160100.U76190@goodwill.io.com> References: <20060404160100.U76190@goodwill.io.com>
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On Tuesday 04 April 2006 05:14 pm, Lars Eighner wrote: > It appears to me that either I have a wrong version of awk or > this Makefile.inc1 is wrong: > > # > # $FreeBSD: src/Makefile.inc1,v 1.499.2.11 2006/04/04 14:24:03 > glebius Exp $ # > > <Snippage> > > MAKEOBJDIRPREFIX?= /usr/obj > .if !defined(OSRELDATE) > .if exists(/usr/include/osreldate.h) > OSRELDATE!= awk '/^\#define[[:space:]]*__FreeBSD_version/ { print > $$3 }' \ /usr/include/osreldate.h > .else > OSRELDATE= 0 > > > In particular with the double dollar sign in the awk statement, > I get no return, therefore OSRELDATE gets set to 0. The awk > statement also fails from the command line. But if I use only > one $, the awk statement succeeds. > > Is there a reason for the double dollar sign? Yes. See make(1): $ A single dollar sign `$', i.e. `$$' expands to a single dollar sign. Jung-uk Kim
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