Bugzilla Bug 81795

When emerging vice 1.16, I get the following error:

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(...)
i686-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I. -I../../../src -I../../../src/arch/unix -I/usr/include/gnome-1.0 -DNEED_GNOMESUPPORT_H -I/usr/lib/gnome-libs/include -I/usr/include/gtk-1.2 -I/usr/include/glib-1.2 -I/usr/lib/glib/include -I/usr/X11R6/include -I../../../src -I../../../src/drive -I../../../src/c64 -I../../../src/c128 -I../../../src/vic20 -I../../../src/pet -I../../../src/cbm2 -I../../../src/sid -I../../../src    -O2 -march=pentium3 -fomit-frame-pointer -pipe -c `test -f 'ffmpeglib.c' || echo './'`ffmpeglib.c
ffmpeglib.c: In function `ffmpeglib_open':
ffmpeglib.c:51: warning: assignment from incompatible pointer type
ffmpeglib.c:52: error: `__av_freep' undeclared (first use in this function)
ffmpeglib.c:52: error: (Each undeclared identifier is reported only once
ffmpeglib.c:52: error: for each function it appears in.)
ffmpeglib.c:58: warning: assignment from incompatible pointer type
make[5]: *** [ffmpeglib.o] Error 1
make[5]: *** Waiting for unfinished jobs....
make[5]: Leaving directory `/var/tmp/portage/vice-1.16/work/vice-1.16/src/arch/unix'
make[4]: *** [all-recursive] Error 1
make[4]: Leaving directory `/var/tmp/portage/vice-1.16/work/vice-1.16/src/arch/unix'
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory `/var/tmp/portage/vice-1.16/work/vice-1.16/src/arch'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/var/tmp/portage/vice-1.16/work/vice-1.16/src'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/var/tmp/portage/vice-1.16/work/vice-1.16/src'
make: *** [all-recursive] Error 1

!!! ERROR: app-emulation/vice-1.16 failed.
!!! Function src_compile, Line 47, Exitcode 2
!!! emake failed
!!! If you need support, post the topmost build error, NOT this status message.
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Reproducible: Always
Steps to Reproduce:

reopen with the output from emerge --info

forgot to click the button.

Here's emerge --info as requested.  By the way, emerging it with USE=-ffmpeg
made it compile, even though ffmpeg isn't in the IUSE flags of the ebuild. 
ffmpeg version is 0.4.9_pre1.

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# emerge --info
Portage 2.0.51-r15 (default-linux/x86/2004.3, gcc-3.4.3,
glibc-2.3.4.20041102-r0, 2.6.10-gentoo-r6 i686)
=================================================================
System uname: 2.6.10-gentoo-r6 i686 Pentium III (Katmai)
Gentoo Base System version 1.4.16
Python:              dev-lang/python-2.3.4 [2.3.4 (#1, Jan 22 2005, 15:53:01)]
ccache version 2.3 [enabled]
dev-lang/python:     2.3.4
sys-devel/autoconf:  2.59-r5
sys-devel/automake:  1.8.5-r1
sys-devel/binutils:  2.14.90.0.8-r1
sys-devel/libtool:   1.5.2-r5
virtual/os-headers:  2.6.8.1-r2
ACCEPT_KEYWORDS="x86"
AUTOCLEAN="yes"
CFLAGS="-O2 -march=pentium3 -fomit-frame-pointer -pipe"
CHOST="i686-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3/share/config
/usr/lib/X11/xkb /usr/share/config /var/qmail/control"
CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d"
CXXFLAGS="-O2 -march=pentium3 -fomit-frame-pointer -pipe"
DISTDIR="/usr/portage/distfiles"
FEATURES="autoaddcvs autoconfig ccache distlocks sandbox sfperms userpriv
usersandbox"
GENTOO_MIRRORS="http://ftp.du.se/pub/os/gentoo"
LANG="nb_NO.UTF-8"
LC_ALL="nb_NO.UTF-8"
LDFLAGS="-Wl,-O1"
MAKEOPTS="-j2"
PKGDIR="/usr/portage/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
SYNC="rsync://rsync.gentoo.org/gentoo-portage"
USE="x86 16bit S3TC X Xaw3d a52 aac aalib acpi acpi4linux aim alsa amd apache2
apm asm async audiofile avi bash-completion bdf berkdb bitmap-fonts
blender-game bzip2 cairo ccache cdda cddb cdio cdparanoia cdr cdrom chroot
clamav codecs crypt css cups curl curlwrappers divx4linux dlopen droproot dts
dvd dvdr dvdread dxr3 edl encode exif expat f77 faad fam fb fbcon fbdev ffmpeg
flac flash fmod font-server foomaticdb fortran freetype ftp gcj gdbm gif gimp
glitz gnome gpm gtk gtk2 hal icq image imap imlib imlib2 ipv6 jabber jack
jack-tmpfs java jit jpeg kde kdeenablefinal ladspa libcaca libclamav libg++
libwww linguas_nb linguas_nb_NO linguas_no linguas_no_NO live logitech-mouse
lua mad matroska md5sum mhash mikmod mime mixer mjpeg mmap mmx mmx2 mng motif
mozilla mpeg mpeg2 mpeg4 mplayer msn music mysql native ncurses nls nptl nvidia
oav objc ocaml ogg oggvorbis openal opengl oscar oss pam pdflib perl php physfs
png python qemu-fast qt quicktime readline real ruby samba scanner sdk sdl
spell sse ssl stencil-buffer stream svg svga tcpd theora threads tiff transcode
truetype truetype-fonts type1-fonts unicode usb usepackagedmakefiles utf8 v4l
v4l2 videos vidix vorbis wma123 wxwindows xanim xine xml xml2 xmms xrandr
xscreensaver xv xvid zlib"
Unset:  ASFLAGS, CBUILD, CTARGET, PORTDIR_OVERLAY
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only works with ffmpeg-0.4.7 so ffmpeg support is now disabled.  I emailed
upstream so hopefully later releases of vice will support the changed api of
ffmpeg.