[gst-embedded] Lame plugin on Gstreamer

[yang shaobo]

Hi ,
I am cross compiling gstreamer on DM355( a arm926 core in it ).
I tried to install the lame plugin to encode mp3 files.
The version of gstreamer is

glib-2.16.5.tar.gz
gstreamer-0.10.20.tar.gz
gst-plugins-base-0.10.20.tar.gz
gst-plugins-good-0.10.8.tar.gz
gst-plugins-ugly-0.10.8.tar.gz
libid3tag-0.15.1b.tar.gz
libmad-0.15.1b.tar.gz
liboil-0.3.15.tar.gz
lame-398-2.tar.gz

When I intalling the gst-plugins-ugly-0.10.8 , I found the following messages:
configure: *** checking feature: lame mp3 encoder library ***
configure: *** for plug-ins: lame ***
checking for lame_init in -lmp3lame... no
configure: *** These plugins will not be built: lame
Before I install the gst-plugins-ugly, I have intalled lame-398-2 .
This problem puzzled for several weeks.
Can someone help me ?