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Date:      Fri, 09 Sep 2016 12:50:47 +0000
From:      bugzilla-noreply@freebsd.org
To:        gnome@FreeBSD.org
Subject:   [Bug 198045] x11-toolkits/pango : Build tools hiding dependency issues
Message-ID:  <bug-198045-6497-7zGpJJvJ4E@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-198045-6497@https.bugs.freebsd.org/bugzilla/>
References:  <bug-198045-6497@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D198045

--- Comment #8 from Melvyn Sopacua <m.r.sopacua@gmail.com> ---
I can agree on a case-by-case base and the discussion about the flaws in
poudriere and similar be moved to ports@.
However, using the .if exists() construct is probably something that is not
understood well by maintainers. The construct can **only** be used when: The
file tested for is guaranteed to be generated before this Makefile is loade=
d.
When the file is generated by a dependency, this condition fails for rather
obvious reasons.
The only sure fire use for this construct is to test for a **system** file:=
 if
/usr/sbin/mailwrapper exists, we can assume that filling mailer.conf is a
useful exercise.

The interpreter problem is definitely portmgr territory. I doubt that the
WARNING issued by `Mk/Uses/python.mk` about mismatched versions ever trigge=
rs
in poudriere builds. Having forgotten about this bugreport, I've even made a
case for this in https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D212273=
 .

The third case, I've not encountered anymore and probably has been eliminat=
ed
over time.

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