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Date: Thu, 21 Feb 2002 15:41:46 -0800
From: Alfred Perlstein <bright@mu.org>
To: Luigi Rizzo <rizzo@icir.org>
Cc: Bruce Evans <bde@zeta.org.au>,
	"M. Warner Losh" <imp@village.org>, current@FreeBSD.ORG,
	msmith@FreeBSD.ORG
Subject: Re: Proposed patch for "/bin/sh: Argument list too long" when compiling LINT ...
Message-ID: <20020221234146.GH12136@elvis.mu.org>
References: <20020218.174959.96666779.imp@village.org> <20020219193515.Y1320-100000@gamplex.bde.org> <20020219004144.A25474@iguana.icir.org> <20020219085306.GL12136@elvis.mu.org> <20020221151439.D53952@iguana.icir.org>
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* Luigi Rizzo <rizzo@icir.org> [020221 15:14] wrote:
> So, in this thread a few days ago i reported that the
> list of arguments passed to mkdep can become quite large
> and exceed kern.argmax, especially if your sources are not in the
> default place and you are compiling a file with lots of options
> such as LINT.
> 
> The place to fix (for -current) is sys/conf/kern.post.mk, and
> as Alfred suggested, a fix involves using xargs (mkdep is already
> invoked with -a). Unfortunately it is not entirely trivial because
> the variable containing the argument list is a Make variable, and
> any attempt to expand it in a command will result in the "Argument
> list too long" error.
> 
> The best I could come up with is the following (modulo cut&paste
> conversion of tabs in spaces), i.e. use make's .for to
> copy the list of files into a file that we can then pass
> to xargs.
> 
> Any better ideas ?

Yes. :)

	$(MAKE) -V CFILES -V SYSTEM_CFILES -V |\
	xargs env MKDEP_CPP="${CC} -E" CC="${CC}" mkdep -a -f .newdep ${CFLAGS}

-Alfred


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