ffmpeg build configuration

create a portable build system to create ffmpeg development shared libraries ( eg. [login to view URL] ) for windows and mac os freelancer will create a folder that ... - folder is a git repository - folder will be placed inside a cygwin installation - as a subproject, ffmpeg sources can be updated via git inside this folder - inside this folder there is a script that -- updates ( pulls ) the ffmpeg git repo -- configures a shared libraries build, lgpl without extra libraries --- resulting ffmpeg shared libs are not dependent on cygwin under windows -- builds these shared libs -- same script builds dylib under macos the folder must contain all neccesary tools so that easy copying of this folder into a new cygwin installation is sufficient. under macos, this folder will work under the normal shell