libfaac not found error when installing ffmpeg

root@talavera:~/ffmpeg# sudo ./configure --enable-gpl --enable-libfaac --enable-nonfree --enable-libgsm --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-libopencore-amrwb --enable-libopencore-amrnb --enable-version3 --extra-cflags=-I~/soft/libfaac/include
ERROR: libfaac not found

If you think configure made a mistake, make sure you are using the latest
version from Git.  If the latest version fails, report the problem to the
ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
Include the log file "config.log" produced by configure as this will help
solving the problem.

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Error in config.log:

/tmp/ffconf.anuCrZQP.c:2:18: error: faac.h: No such file or directory
/tmp/ffconf.anuCrZQP.c: In function 'check_faacEncGetVersion':
/tmp/ffconf.anuCrZQP.c:3: error: 'faacEncGetVersion' undeclared (first use in this function)
/tmp/ffconf.anuCrZQP.c:3: error: (Each undeclared identifier is reported only once
/tmp/ffconf.anuCrZQP.c:3: error: for each function it appears in.)
ERROR: libfaac not found