Date: Sat, 30 Nov 2002 17:52:05 +1100 (EST) From: Bruce Evans <bde@zeta.org.au> To: Poul-Henning Kamp <phk@FreeBSD.ORG> Cc: current@FreeBSD.ORG Subject: Re: suggested WARNS makefile magic Message-ID: <20021130174805.T3454-100000@gamplex.bde.org> In-Reply-To: <1881.1038557926@critter.freebsd.dk>
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On Fri, 29 Nov 2002, Poul-Henning Kamp wrote:
> Right now, if I want to ensure that a particular program compiles
> with a WARNS level of no less than 3, I have to put this in the
> Makefile:
>
> WARNS?= 3
> .if ${WARNS} < 3
> WARNS= 3
> .endif
Only in broken Makefiles. WARNS?= 3 should work in all cases (except
when WARNS is set at a higher level, e.g., on the command line, in
which case the setter really wants that level and individual makefiles
should not override it). Makefiles may be broken by including
../Makefile.inc before setting WARNS, in which case the setting may
be obained from ../Makefile.inc and any setting in the Makefile is
bogus. Another common error is "WARNS= 3" to break any setting at
a higher level.
Bruce
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