compiling the package x11/gtk2 I got this error

 cc -DHAVE_CONFIG_H -I. -I.. -DG_LOG_DOMAIN=\"Gtk\" -DGTK_LIBDIR=\"/usr/pkg/lib\" -DGTK_DATADIR=\"/usr/pkg/share\" -
DGTK_DATA_PREFIX=\"/usr/pkg\" -DGTK_SYSCONFDIR=\"/usr/pkg/libdata\" -DGTK_VERSION=\"2.12.0\" -DGTK_BINARY_VERSION=\"2.10
.0\" -DGTK_HOST=\"i386-pc-nto-qnx6.3.0\" -DGTK_COMPILATION -DGTK_PRINT_BACKENDS=\"file,lpr\" "-
DGTK_PRINT_PREVIEW_COMMAND=\"evince --unlink-tempfile --preview --print-settings %s %f\"" -I../gtk -I../gdk -I../gdk-
pixbuf -DGDK_PIXBUF_DISABLE_DEPRECATED -DGDK_DISABLE_DEPRECATED -DGTK_FILE_SYSTEM_ENABLE_UNSUPPORTED -
DGTK_PRINT_BACKEND_ENABLE_UNSUPPORTED -DG_DISABLE_CAST_CHECKS -D_REENTRANT -I/usr/src/HEAD/pkgsrc/x11/gtk2/work/.
buildlink/include/glib/glib-2.0 -I/usr/src/HEAD/pkgsrc/x11/gtk2/work/.buildlink/lib/glib-2.0/include -I/usr/src/HEAD/
pkgsrc/x11/gtk2/work/.buildlink/include/pango-1.0 -I/usr/src/HEAD/pkgsrc/x11/gtk2/work/.buildlink/include/cairo -I/usr/
src/HEAD/pkgsrc/x11/gtk2/work/.buildlink/include -I/usr/src/HEAD/pkgsrc/x11/gtk2/work/.buildlink/include/freetype2 -I/
usr/src/HEAD/pkgsrc/x11/gtk2/work/.buildlink/include/libpng12 -I/usr/src/HEAD/pkgsrc/x11/gtk2/work/.buildlink/include/
atk-1.0 -DPREFIX=\"/usr/pkg\" -O2 -Wall -MT gtkdialog.lo -MD -MP -MF .deps/gtkdialog.Tpo -c gtkdialog.c  -fPIC -DPIC -o 
.libs/gtkdialog.o
In file included from /usr/src/HEAD/pkgsrc/x11/gtk2/work/.buildlink/include/pango-1.0/pango/pango-utils.h:25,
                 from /usr/src/HEAD/pkgsrc/x11/gtk2/work/.buildlink/include/pango-1.0/pango/pango.h:45,
                 from ../gdk/gdktypes.h:33,
                 from ../gdk/gdkcolor.h:31,
                 from ../gdk/gdkcairo.h:23,
                 from ../gdk/gdk.h:30,
                 from gtkbutton.h:31,
                 from gtkdialog.c:30:
/usr/qnx632/target/qnx6/usr/include/stdio.h:260: error: conflicting types for `fseeko'
/usr/qnx632/target/qnx6/usr/include/stdio.h:188: error: previous declaration of `fseeko'

The workaround is to put an additional #include <stdio.h> at the beginning of the gtkdialog.c. So I was able to build 
gtk2. I do not have investigate the problem further, but there seem to be situations where the guards arround both of 
the fseeko are evaluated to true. IMHO this should not happen.

The system is a Momentics 6.3.2 with the pkgsrc utilities and
cc (GCC) 3.3.5 (qnx-nto).