Here is how I built it using PR10.

$ cd IntelCE-1.1121
$ cd i686-linux-elf/lib/pkgconfig

Fix the prefix in the files at ~/IntelCE-1.1121/i686-linux-elf/lib/pkgconfig
 * gstreamer-0.10.pc
 * gstreamer-base-0.10.pc
 * gstreamer-plugins-base-0.10.pc
 * glib-2.0.pc

In my installation should look like:

$ cat gstreamer-0.10.pc
prefix=/home/jep/IntelCE-1.1121/i686-linux-elf
exec_prefix=${prefix}
libdir=${exec_prefix}/lib
includedir=${prefix}/include/gstreamer-0.10
toolsdir=${exec_prefix}/bin
pluginsdir=${exec_prefix}/lib/gstreamer-0.10

Name: GStreamer
Description: Streaming media framework
Requires: glib-2.0, gobject-2.0, gmodule-no-export-2.0, gthread-2.0
Version: 0.10.22
Libs: -L${libdir} -lgstreamer-0.10
Cflags: -I${includedir}

Uncompress and build:

$ tar jxvf /tmp/gst-fluendo-gdlsink-0.10.4.tar.bz2
$ cd gst-fluendo-gdlsink-0.10.4
$ export
PKG_CONFIG_PATH=/home/jep/IntelCE-1.1121/i686-linux-elf/lib/pkgconfig
$ ./configure --prefix=/home/jep/IntelCE-1.1121/i686-linux-elf
$ make
