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Re: pre and post install targets

From: Ralf Wildenhues
Subject: Re: pre and post install targets
Date: Sun, 20 Jul 2008 21:29:32 +0200
User-agent: Mutt/1.5.18 (2008-05-17)


* Bernd Jendrissek wrote on Fri, Jul 18, 2008 at 01:32:34PM CEST:
> On Thu, Jul 17, 2008 at 10:20 AM, Jose-Marcio <address@hidden> wrote:
> > Currently, I've defined a new target (upgrade) which depends
> > on :
> >
> > upgrade : preinstall install postinstall
> Note that that breaks under make -j upgrade.

Yep.  If you were to let install depend on preinstall, and postinstall
on install then parallel make works again, but you cannot run
  make postinstall

usefully.  What you can do instead is

        $(MAKE) $(AM_MAKEFLAGS) preinstall
        $(MAKE) $(AM_MAKEFLAGS) install
        $(MAKE) $(AM_MAKEFLAGS) postinstall

or, if you assume a recent GNU make, then you can use order-only

  install: | preinstall
  postinstall: | install

Note that Automake provides install-{data,exec}-hook to which
postinstall actions may be hooked, as they are run strictly after
(the Automake-provided target named) install.  However, there is no
dedicated target to use for preinstall.

I'm not sure whether we should introduce such pre hooks.

Hope that helps.


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