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Date:      Mon, 28 Jul 2014 21:21:42 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-ports-bugs@FreeBSD.org
Subject:   [Bug 192219] New: libav pkgconfig file missing suffix
Message-ID:  <bug-192219-13@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=192219

            Bug ID: 192219
           Summary: libav pkgconfig file missing suffix
           Product: Ports Tree
           Version: Latest
          Hardware: amd64
                OS: Any
            Status: Needs Triage
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: freebsd-ports-bugs@FreeBSD.org
          Reporter: groot@kde.org

On a 9.3-STABLE system, I installed libav using binary packages from
pkg.freebsd.org. This installs "suffixed" pkgconfig files, like
libdata/pkgconfig/libswscale-libav.pc. This is done by files/patch-library.mak,
presumably to avoid colliding with the ffmpeg files of the same name. However,
the Requires.private lines *inside* the pkgconfig files are not similarly
modified. Here's the installed libswscale-libav.pc:

===
exec_prefix=${prefix}
libdir=/usr/local/lib/libav
includedir=/usr/local/include/libav

Name: libswscale
Description: Libav image rescaling library
Version: 2.1.2
Requires: 
Requires.private: libavutil = 53.3.0
Conflicts:
Libs: -L${libdir} -lswscale 
Libs.private: -lm
Cflags: -I${includedir}
===

Because libavutil's pkgconfig file is also installed with a suffix, the
Requires.private line (with just libavutil) demands a package that does not
exist. It should be libavutil-libav as well.

This trips up some builds (e.g. with cmake using pkg_check_modules(FOO
libswscale-libav)) which gather the requirements as well and then fail because
libavutil (a requirement of libswscale-libav) is not installed.

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