Date: Thu, 8 Jan 2004 13:43:04 +0000 From: Matthew Seaman <m.seaman@infracaninophile.co.uk> To: Ceri Davies <ceri@submonkey.net>, Eric F Crist <ecrist@adtechintegrated.com>, freebsd-questions@freebsd.org Subject: Re: What is the difference between ; and && Message-ID: <20040108134304.GA3863@happy-idiot-talk.infracaninophile.co.uk> In-Reply-To: <20040107233858.GM8322@submonkey.net> References: <200401071736.42467.ecrist@adtechintegrated.com> <20040107233858.GM8322@submonkey.net>
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On Wed, Jan 07, 2004 at 11:38:58PM +0000, Ceri Davies wrote:
> On Wed, Jan 07, 2004 at 05:36:42PM -0600, Eric F Crist wrote:
> > make depend && make && make install
> [Of course, if the Makefile has it's dependencies correct, then a simple
> "make install" will achieve the same thing.]
Hmmm... Usually 'make depend' generates a dependency Makefile, which
is .included'ed into the main Makefile on subsequent runs. That means
that
make depend ; make all
has a different effect to:
make depend all
Unless make(1) has been taught to keep tabs on it's included Makefiles
and knows how to re-load them if their modification time changes. As
I understood it, that was a trick that gmake(1) could do but that BSD
make couldn't.
Cheers,
Matthew
--=20
Dr Matthew J Seaman MA, D.Phil. 26 The Paddocks
Savill Way
PGP: http://www.infracaninophile.co.uk/pgpkey Marlow
Tel: +44 1628 476614 Bucks., SL7 1TH UK
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