Please describe the problem:
The gstreamer-ffmpeg package will not compile on PowerPC.

Steps to reproduce:
Try to build gstreamer-ffmpeg using a PowerPC CPU with Altivec. 


Actual results:
gcc -DHAVE_CONFIG_H -I. -I. -I.. -I../libavcodec -DHAVE_AV_CONFIG_H=1 -Wall
-Wno-switch -O2 -g -m32 -MT eval.lo -MD -MP -MF .deps/eval.Tpo -c eval.c  -fPIC
-DPIC -o .libs/eval.o
In file included from ../libavcodec/dsputil.h:471,
                 from ../libavcodec/mpegvideo.h:29,
                 from eval.c:30:
/usr/lib/gcc/ppc64-redhat-linux/4.1.0/include/altivec.h:37:2: error: #error Use
the "-maltivec" flag to enable PowerPC AltiVec support

Expected results:


Does this happen every time?


Other information:
Prepending CFLAGS=-maltivec ./configure causes gstreamer-ffmpeg to build
successfully (gcc -maltivec used.)  Configure should be able to pick up this
requirement automatically.