Path: utzoo!utgpu!attcan!uunet!mcvax!ukc!strath-cs!glasgow!Robert
From: robert@vax1.computing-maths.cardiff.ac.uk (Robert Evans)
Newsgroups: comp.mail.sendmail,mail.uk-sendmail-workers
Subject: Re:  UkSendmail1.5 dom,chn Makefiles fall over on Ultrix
Message-ID: <23151.8807291752@uk.ac.cardiff.computing-maths.vax1>
Date: 29 Jul 88 17:52:25 GMT
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In-Reply-To: Jem Taylor's message of Jul 29, 18:26
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| 		-@if [ ! -s $@ ] ; \
| But the intention *is* to stop the make if the generated file is null ...
| are you saying the make stops when the file is non-null ? That is, when
| the test fails ? This is really nasty ! 
| To abort  when the file is null, we need to invert the test.
Yes.

| I suggest the following fragment.
| 
|         @if [ -s $@ ] ; \
|                 then :; \
|                 else    echo "$@ null - Abort" ;\
|                         if [ -s $@.BCK ] ; then mv $@.BCK $@ ; fi;\
|                         exit 99 ; fi
That would have the desired effect but the make aborts as a side effect of the
test "[ -s $@ ]" being false rather than because of the exit! (Hard to believe
but I just tried it to see).

Robert