[mythtv-users] Problem building today's CVS of mythtv. What did I miss?

[William]

I am trying to build today's CVS and I keep getting the same error output.
What am I doing wrong? Here is the error output.

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ARGEFILE_SOURCE -D_GNU_SOURCE -D_REENTRANT  -D_GNU_SOURCE
-D_FILE_OFFSET_BITS=64 -DPREFIX=\"/usr/local\" -DMMX -DCONFIG_VIDEO4LINUX
-DUSING_IVTV -DQT_NO_DEBUG -DQT_THREAD_SUPPORT
-I/usr/lib/qt-3.1/mkspecs/default -I. -I../.. -I/usr/lib/qt-3.1/include -o
vp3dsp_sse2.o i386/vp3dsp_sse2.c
rm -f libmythavcodec-0.15.so.0.15.0 libmythavcodec-0.15.so
libmythavcodec-0.15.so.0 libmythavcodec-0.15.so.0.15
g++ -shared -Wl,-soname,libmythavcodec-0.15.so.0 -o
libmythavcodec-0.15.so.0.15.0 common.o utils.o mem.o allcodecs.o mpegvideo.o
h263.o jrevdct.o jfdctfst.o mpegaudio.o ac3enc.o mjpeg.o audresample.o
dsputil.o motion_est.o imgconvert.o imgresample.o msmpeg4.o mpeg12.o
h263dec.o svq1.o rv10.o mpegaudiodec.o pcm.o simple_idct.o ratecontrol.o
adpcm.o eval.o jfdctint.o dv.o error_resilience.o wmadec.o fft.o mdct.o
mace.o huffyuv.o opts.o cyuv.o golomb.o h264.o raw.o indeo3.o asv1.o vp3.o
4xm.o cabac.o ra144.o ra288.o vcr1.o cljr.o roqvideo.o dpcm.o
interplayvideo.o xan.o rpza.o cinepak.o msrle.o msvideo1.o vqavideo.o
idcinvideo.o adx.o rational.o faandct.o 8bps.o parser.o smc.o flicvideo.o
truemotion1.o vmdav.o lcl.o qtrle.o g726.o flac.o vp3dsp.o integer.o
postprocess.o a52dec.o bit_allocate.o bitstream.o downmix.o imdct.o parse.o
crc.o resample.o fdct_mmx.o cputest.o dsputil_mmx.o mpegvideo_mmx.o
idct_mmx.o motion_est_mmx.o simple_idct_mmx.o fft_sse.o vp3dsp_mmx.o
vp3dsp_sse2.o   -L/usr/lib/qt-3.1/lib -L/usr/X11R6/lib -lqt-mt -lXext -lX11
-lm -lpthread
/usr/bin/ld: cannot find -lXext
collect2: ld returned 1 exit status
make[2]: *** [libmythavcodec-0.15.so.0.15.0] Error 1
make[2]: Leaving directory `/root/CVS/mythtv/libs/libavcodec'
make[1]: *** [sub-libavcodec] Error 2
make[1]: Leaving directory `/root/CVS/mythtv/libs'
make: *** [sub-libs] Error 2

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