build: add --enable-ffmpeg-strict-abi option

This can be used by distros to disable all known FFmpeg ABI violations.

Currently only 1 is known, in demux_lavf.c. In addition to if-defing out
the access to the private FFmpeg field, this disables the possibly
fragile nested open callbacks, which make sense only if the
aforementioned field can be accessed.

1 files changed, 4 insertions, 0 deletions

diff --git a/wscript b/wscript
index 77fe5521b8..b1fc93a8e0 100644
--- a/wscript
+++ b/wscript
@@ -490,6 +490,10 @@ FFmpeg/Libav libraries. Git master is recommended."
         'name': '--libavdevice',
         'desc': 'libavdevice',
         'func': check_pkg_config('libavdevice', '>= 57.0.0'),
+    }, {
+        'name': '--ffmpeg-strict-abi',
+        'desc': 'Disable all known FFmpeg ABI violations',
+        'default': 'disable',
     }
 ]