[FFmpeg-trac] #2775(FFmpeg:new): Support self-contained built ?

[FFmpeg]

#2775: Support self-contained built ?
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             Reporter:  jwfang  |                     Type:  enhancement
               Status:  new     |                 Priority:  normal
            Component:  FFmpeg  |                  Version:  unspecified
             Keywords:          |               Blocked By:
             Blocking:          |  Reproduced by developer:  0
Analyzed by developer:  0       |
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 i want to build a "re-producable" FFmpeg and all its dependency 3rd party
 libraries in a directory without any dependency on the host system.
 But FFmpeg include x264 with #include <x264.h>, and the configure script
 APPEND -I flags. So if i have a x264 installed in /usr/local, it will be
 used, and there is no means to force FFmpeg to use my own libx264.

 I can think of the following solution:
 1) if --extra-cflags PREPEND instead of append
 2) --with-foolib=<dir>
 3) include with "" instead of <>, and use GCC's -iquote

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2775>
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