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Date:      Fri, 5 Aug 2005 10:05:13 +0300
From:      Vasil Dimov <vd@datamax.bg>
To:        freebsd-ports@freebsd.org
Subject:   The right way to depend on a package's extra feature
Message-ID:  <20050805070513.GA60681@sinanica.bg.datamax>

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Hi list,

What it the right way to make a port that depends on other port, but
that other port must be built with some extra feature?

For example, imagine we have port "A" that installs
/foo/bar/great_feature only if it is build with
'make WITH_GREAT_FEATURE=yes'

Then we have port "B" that happens to depend on /foo/bar/great_feature.

You see, there are two problems here:

1. We cannot pass WITH_GREAT_FEATURE=yes via the RUN_DEPENDS technology,
   only the target may be specified: RUN_DEPENDS=/file:portdir:target
   needed command: make -C portdir WITH_GREAT_FEATURE=yes target

2. Port A may have already been installed without WITH_GREAT_FEATURE=yes
   This will cause make WITH_GREAT_FEATURE=yes install in A's dir to fail
   with error "already installed"
   needed command: portupgrade -f -m WITH_GREAT_FEATURE=yes /var/db/pkg/A
   (huh! we used portupgrade, not very nice...)

Any suggestions? Did I miss something?

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