gtkglext compile error

zdravim, neviete nahodou prosim vas cim moze byt sposobena tato chyba pri kompilacii gtkglext?.....pouzivam gentoo, a kvoli tejto chybe nemozem revdep-rebuild takze mi v danej chvili nefunguju nejake programy ktore boli na to odkazane

i686-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I. -I.. -DG_LOG_DOMAIN=\"GdkGLExt\" -DGDK_GL_COMPILATION -I.. -DG_ENABLE_DEBUG -I/usr/include/gtk-2.0 -I/usr/lib/gtk-2.0/include -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12 -DG_DISABLE_DEPRECATED -DGDK_DISABLE_DEPRECATED -DGDK_PIXBUF_DISABLE_DEPRECATED -O2 -march=i686 -pipe -Wall -MT gdkglpixmap.lo -MD -MP -MF .deps/gdkglpixmap.Tpo -c gdkglpixmap.c -fPIC -DPIC -o .libs/gdkglpixmap.o
i686-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I. -I.. -DG_LOG_DOMAIN=\"GdkGLExt\" -DGDK_GL_COMPILATION -I.. -DG_ENABLE_DEBUG -I/usr/include/gtk-2.0 -I/usr/lib/gtk-2.0/include -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12 -DG_DISABLE_DEPRECATED -DGDK_DISABLE_DEPRECATED -DGDK_PIXBUF_DISABLE_DEPRECATED -O2 -march=i686 -pipe -Wall -MT gdkglpixmap.lo -MD -MP -MF .deps/gdkglpixmap.Tpo -c gdkglpixmap.c -o gdkglpixmap.o >/dev/null 2>&1
if /bin/sh ../libtool --mode=compile i686-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I. -I.. -DG_LOG_DOMAIN=\"GdkGLExt\" -DGDK_GL_COMPILATION -I.. -DG_ENABLE_DEBUG -I/usr/include/gtk-2.0 -I/usr/lib/gtk-2.0/include -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12 -DG_DISABLE_DEPRECATED -DGDK_DISABLE_DEPRECATED -DGDK_PIXBUF_DISABLE_DEPRECATED -O2 -march=i686 -pipe -Wall -MT gdkglwindow.lo -MD -MP -MF ".deps/gdkglwindow.Tpo" \
-c -o gdkglwindow.lo `test -f 'gdkglwindow.c' || echo './'`gdkglwindow.c; \
then mv -f ".deps/gdkglwindow.Tpo" ".deps/gdkglwindow.Plo"; \
else rm -f ".deps/gdkglwindow.Tpo"; exit 1; \
fi
i686-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I. -I.. -DG_LOG_DOMAIN=\"GdkGLExt\" -DGDK_GL_COMPILATION -I.. -DG_ENABLE_DEBUG -I/usr/include/gtk-2.0 -I/usr/lib/gtk-2.0/include -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12 -DG_DISABLE_DEPRECATED -DGDK_DISABLE_DEPRECATED -DGDK_PIXBUF_DISABLE_DEPRECATED -O2 -march=i686 -pipe -Wall -MT gdkglwindow.lo -MD -MP -MF .deps/gdkglwindow.Tpo -c gdkglwindow.c -fPIC -DPIC -o .libs/gdkglwindow.o
gdkglwindow.c: In function 'gdk_window_set_gl_capability':
gdkglwindow.c:743: error: dereferencing pointer to incomplete type
gdkglwindow.c:749: error: dereferencing pointer to incomplete type
make[4]: *** [gdkglwindow.lo] Error 1
make[4]: Leaving directory `/var/tmp/portage/x11-libs/gtkglext-1.2.0/work/gtkglext-1.2.0/gdk'
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory `/var/tmp/portage/x11-libs/gtkglext-1.2.0/work/gtkglext-1.2.0/gdk'
make[2]: *** [all] Error 2
make[2]: Leaving directory `/var/tmp/portage/x11-libs/gtkglext-1.2.0/work/gtkglext-1.2.0/gdk'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/var/tmp/portage/x11-libs/gtkglext-1.2.0/work/gtkglext-1.2.0'
make: *** [all] Error 2
* ERROR: x11-libs/gtkglext-1.2.0 failed:
* compile failure
*
* Call stack:
* ebuild.sh, line 54: Called src_compile
* environment, line 1458: Called gnome2_src_compile
* environment, line 1210: Called die
* The specific snippet of code:
* emake || die "compile failure"
*
* If you need support, post the output of 'emerge --info =x11-libs/gtkglext-1.2.0',
* the complete build log and the output of 'emerge -pqv =x11-libs/gtkglext-1.2.0'.
* The complete build log is located at '/var/tmp/portage/x11-libs/gtkglext-1.2.0/temp/build.log'.
* The ebuild environment file is located at '/var/tmp/portage/x11-libs/gtkglext-1.2.0/temp/environment'.
* S: '/var/tmp/portage/x11-libs/gtkglext-1.2.0/work/gtkglext-1.2.0'


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