I am installing ffmpeg utility, but I am facing libmp3lame >= 3.98.3 not found not found error. I am able to find lame-3.99.5-1.el6.rf.x86_64.rpm an
For configure troubleshooting see the ffbuild/config.log in the ffmpeg source directory.
In my case it had missing references to libmath functions, even if -lm was set in host_extralibs.
For a quick-fix add -lm to the configure script:
enabled libmp3lame && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame -lm