Bugzilla Bug 51056

I've tried to emerge both stable and unstable media-sound/hydrogen and I get
this error:
g++ -DHAVE_CONFIG_H -I. -I. -I.. -I../lib -I/usr/qt/3/include
-I/usr/X11R6/include   -DQT_THREAD_SUPPORT  -D_REENTRANT  -O3  -c -o
LadspaFXSelector_UI.o `test -f 'LadspaFXSelector_UI.cpp' || echo
'./'`LadspaFXSelector_UI.cpp
source='PatternPropertiesDialog_UI.cpp' object='PatternPropertiesDialog_UI.o'
libtool=no \
depfile='.deps/PatternPropertiesDialog_UI.Po'
tmpdepfile='.deps/PatternPropertiesDialog_UI.TPo' \
depmode=gcc3 /bin/sh ../admin/depcomp \
g++ -DHAVE_CONFIG_H -I. -I. -I.. -I../lib -I/usr/qt/3/include
-I/usr/X11R6/include   -DQT_THREAD_SUPPORT  -D_REENTRANT  -O3  -c -o
PatternPropertiesDialog_UI.o `test -f 'PatternPropertiesDialog_UI.cpp' || echo
'./'`PatternPropertiesDialog_UI.cpp
LadspaFXSelector_UI.cpp: In constructor `
   LadspaFXSelector_UI::LadspaFXSelector_UI(QWidget*, const char*, bool,
   unsigned int)':
LadspaFXSelector_UI.cpp:57: error: `Spacer2' undeclared (first use this
   function)
LadspaFXSelector_UI.cpp:57: error: (Each undeclared identifier is reported only
   once for each function it appears in.)
LadspaFXSelector_UI.cpp:71: error: `Spacer1' undeclared (first use this
   function)
make[3]: *** [LadspaFXSelector_UI.o] Error 1
make[3]: *** Waiting for unfinished jobs....
AudioEngineInfoForm_UI.cpp: In constructor `
   AudioEngineInfoForm_UI::AudioEngineInfoForm_UI(QWidget*, const char*,
   unsigned int)':
AudioEngineInfoForm_UI.cpp:75: error: `Spacer2' undeclared (first use this
   function)
AudioEngineInfoForm_UI.cpp:75: error: (Each undeclared identifier is reported
   only once for each function it appears in.)
AudioEngineInfoForm_UI.cpp:80: error: `Spacer1' undeclared (first use this
   function)
make[3]: *** [AudioEngineInfoForm_UI.o] Error 1
make[3]: Leaving directory
`/var/tmp/portage/hydrogen-0.8.2/work/hydrogen-0.8.2/hydrogen_gui'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory
`/var/tmp/portage/hydrogen-0.8.2/work/hydrogen-0.8.2/hydrogen_gui'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory
`/var/tmp/portage/hydrogen-0.8.2/work/hydrogen-0.8.2'
make: *** [all] Error 2

emerge info:
Portage 2.0.50-r6 (default-x86-1.4, gcc-3.3.2, glibc-2.3.2-r9, 2.6.6-rc3-mm1)
=================================================================
System uname: 2.6.6-rc3-mm1 i686 AMD Athlon(tm) MP 2600+
Gentoo Base System version 1.4.10
ccache version 2.3 [enabled]
Autoconf: sys-devel/autoconf-2.58-r1
Automake: sys-devel/automake-1.8.3
ACCEPT_KEYWORDS="x86"
AUTOCLEAN="yes"
CFLAGS="-O3 -march=athlon-mp -funroll-loops -fprefetch-loop-arrays -pipe
-fomit-frame-pointer"
CHOST="i686-pc-linux-gnu"
COMPILER="gcc3"
CONFIG_PROTECT="/etc /usr/X11R6/lib/X11/xkb /usr/kde/2/share/config
/usr/kde/3/share/config /usr/lib/mozilla/defaults/pref /usr/share/config
/var/qmail/control"
CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d"
CXXFLAGS="-O3 -march=athlon-mp -funroll-loops -fprefetch-loop-arrays -pipe
-fomit-frame-pointer"
DISTDIR="/usr/portage/distfiles"
FEATURES="autoaddcvs ccache sandbox"
GENTOO_MIRRORS="http://gentoo.ccccom.com ftp://gentoo.ccccom.com
http://mirror.datapipe.net/gentoo http://mirror.datapipe.net/gentoo
ftp://mirrors.tds.net/gentoo"
MAKEOPTS="-j3"
PKGDIR="/usr/portage/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/usr/local/portage"
SYNC="rsync://rsync.us.gentoo.org/gentoo-portage"
USE="3dnow X aalib alsa apm avi berkdb bonobo cdr composite crypt cups curl dri
dvd emacs encode esd evo foomaticdb gdbm gif gnome gphoto2 gpm gtk gtk2 gtkhtml
guile imagemagick imlib jack jpeg libg++ libgda libwww mad mikmod mmx motif
mozilla mpeg mysql ncurses nls nocardbus nocd oggvorbis opengl oss pam pdflib
perl plotutils png ppds python quicktime readline sdl slang spell sse ssl svga
tcltk tcpd truetype usb video_cards_radeon wmf x86 xinerama xml2 xmms xv zlib"

Hi Harold, this is not a new problem - there is a solution given in bug #46568
Unfortunately the ebuild maintainer seems to ignore that bug an its solution.

Nicolai:  What solution do you mean in that other bug?  It works out of the box
here, and I don't see any solutions posted in that bug.

*** This bug has been marked as a duplicate of 46568 ***