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From: jw@sics.se (Johan Widen)
Newsgroups: comp.lang.perl
Subject: Re: statmon: monitor up/down and time status of hosts (makelib actually)
Message-ID: <1990Mar16.223117.14948@sics.se>
Date: 16 Mar 90 22:31:17 GMT
References: <100508@convex.convex.com>
Sender: news@sics.se
Followup-To: comp.lang.perl
Organization: Swedish Institute of Computer Science, Kista
Lines: 52
In-Reply-To: tchrist@convex.com's message of 10 Mar 90 14:48:06 GMT

>>>>> In article <100508@convex.convex.com>, tchrist@convex.com (Tom Christiansen) writes:

tchrist> Porting notes:  you'll need the following include files, probably in
tchrist> the perl library directory, which you should have generated from the
tchrist> corresponding C include files using the makelib program in the perl
tchrist> source directory:

tchrist> 	sys/errno.h
tchrist> 	sys/socket.h
tchrist> 	sys/ioctl.h

Thanks for an interesting application. I had some trouble getting the include
files to work. This was the first time I tried to use 'makelib'. I spent
a couple of hours trying to understand what was going on and in desperation
I eventually started to look at backissues of comp.lang.perl.

I found that Tom Christiansen has published an article about makelib
	Subject: makelib and beyond (was: syscall.pl)
	Message-ID: <-1773786449@convex.convex.com>
	Date: 14 Feb 90 21:54:24 GMT

This article solved my problem! Thanks!! It turns out that there is a big in
the makelib script. Tom suggests the following change:

tchrist>First of all, the makelib program can generate things like this
tchrist>        $X & $Y
tchrist>    or sans spaces:
tchrist>        $X&$Y
tchrist>but if $Y were a subroutine, you'd have
tchrist>        $X & &Y
tchrist>    or sans spaces:
tchrist>        $X&&Y
tchrist>
tchrist>which is pretty clearly wrong, as perl will see this as
tchrist>        ($X)&&(Y)
tchrist>and give you a syntax error.
tchrist>
tchrist>To fix this, you have to change line #157 of makelib from
tchrist>            $new .= '&' . $id;
tchrist>to
tchrist>            $new .= "(&$id)";
tchrist>
tchrist>and this gets better.

This solved my problem. The article is available on tut.cis.ohio-state.edu
in pub/perl/scripts/makelib.stuff. This article is a must for anyone interested
in makelib.

--
Johan Widen
SICS, PO Box 1263, S-164 28 KISTA, SWEDEN	Internet: jw@sics.se
Tel: +46 8 752 15 32	Ttx: 812 61 54 SICS S	Fax: +46 8 751 72 30