This allows explicitly enabled things to _select others with the
intended result.
Originally committed as revision 23843 to svn://svn.ffmpeg.org/ffmpeg/trunk
--enable-debug=*) debuglevel="$optval"
;;
--disable-everything)
- map 'eval disable \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
+ map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
;;
--enable-*=*|--disable-*=*)
eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')