[Libreoffice] Problem with build environment: Gtk-linkage error

Hi,
Sorry to bother you, but I have a problem with my build environment
that I can not figure out by myself. I suspect that there is something
obvious...

I'm on a vanilla Opensuse 11.4. I have the required dependencies
installed gtk, gtk-devel and so on. I have also the
libreoffice-bootstrap package installed but I don't use it directly
(should I?)

Instead I pulled down the bootstrap via git and then ran
./download
./autogen.sh --with-num-cpus=2
make

Then after compiling for a while:

deliver -- version: 275594
Module 'automation' delivered successfully. 1 files copied, 20 files unchanged
[ build LNK ] Library/libqstart_gtkli.so
/home/thuswa/work/libreoffice/bootstrap/solver/300/unxlngi6.pro/workdir/CxxObject/sfx2/source/appl/shutdowniconunx.o:
In function `menu_deactivate_cb(_GtkWidget*)':
shutdowniconunx.cxx:(.text+0xb8): undefined reference to `gtk_menu_get_type'
shutdowniconunx.cxx:(.text+0xc3): undefined reference to
`g_type_check_instance_cast'
shutdowniconunx.cxx:(.text+0xcb): undefined reference to `gtk_menu_popdown'
/home/thuswa/work/libreoffice/bootstrap/solver/300/unxlngi6.pro/workdir/CxxObject/sfx2/source/appl/shutdowniconunx.o:
In function `add_image_menu_item(_GtkMenuShell*, char const*,
rtl::OUString, void (*)())':
.....

           <<<More similar output>>>>

....
shutdowniconunx.cxx:(.text+0xf42): undefined reference to `gtk_menu_get_type'
shutdowniconunx.cxx:(.text+0xf4d): undefined reference to
`g_type_check_instance_cast'
shutdowniconunx.cxx:(.text+0xf5a): undefined reference to
`gtk_status_icon_position_menu'
shutdowniconunx.cxx:(.text+0xf64): undefined reference to `gtk_menu_popup'
collect2: ld returned 1 exit status
make[1]: *** 
[/home/thuswa/work/libreoffice/bootstrap/solver/300/unxlngi6.pro/workdir/LinkTarget/Library/libqstart_gtkli.so]
Error 1
dmake:  Error code 2, while making 'all'

-----------------------------------------------------------------------
        Oh dear - something failed during the build - sorry !
  For more help with debugging build errors, please see the section in:
            http://wiki.documentfoundation.org/Development

  internal build errors:

ERROR: error 65280 occurred while making
/home/thuswa/work/libreoffice/bootstrap/sfx2/prj

 it seems that the error is inside 'sfx2', please re-run build
 inside this module to isolate the error and/or test your fix:
-----------------------------------------------------------------------

I.e. linkage of GTK+ fails!

So what to look for:

pkg-config --cflags --modversion gtk+-2.0

gives me:

2.22.1
-pthread -I/usr/include/gtk-2.0 -I/usr/lib/gtk-2.0/include
-I/usr/include/atk-1.0 -I/usr/include/cairo
-I/usr/include/gdk-pixbuf-2.0 -I/usr/include/pango-1.0
-I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include
-I/usr/include/pixman-1 -I/usr/include/freetype2
-I/usr/include/libpng12

also relevant parts of config.log:

ac_cv_env_GTK_CFLAGS_set=set
ac_cv_env_GTK_CFLAGS_value='-pthread -I/usr/include/gtk-2.0
-I/usr/lib/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo
-I/usr/include/gdk-pixbuf-2.0 -I/usr/include/pango-1.0
-I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include
-I/usr/include/pixman-1 -I/usr/include/freetype2
-I/usr/include/libpng12  '
ac_cv_env_GTK_LIBS_set=set
ac_cv_env_GTK_LIBS_value='-pthread -lgtk-x11-2.0 -lgdk-x11-2.0
-latk-1.0 -lgio-2.0 -lpangoft2-1.0 -lpangocairo-1.0 -lcairo
-lpango-1.0 -lfreetype -lfontconfig -lgdk_pixbuf_xlib-2.0
-lgdk_pixbuf-2.0 -lm -lgobject-2.0 -lgmodule-2.0 -lpng12 -lgthread-2.0
-lrt -lglib-2.0  '

What am I doing wrong? Any hints and pointers are welcome.

TIA
/Albert