On Tue, 4 Apr 2006, Jung-uk Kim wrote:
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.
Then why does it get the wrong answer? Also is there a
difference when the accent mark is used in front instead of a
real single quote?
--
Lars Eighner
[EMAIL PROTECTED] [EMAIL PROTECTED]
http://www.larseighner.com/index.html
8800 N IH35 APT 1191 AUSTIN TX 78753-5266
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