[FFmpeg-user] unable to cross compile shared?

[Roger Pack]

> Creating library file: libavformat/libavformat.dll.alibavformat/4xm.o:
> In function `fourxm_read_packet':
> /home/rdp/dev/ffmpeg-windows-build-helpers/sandbox/win32/ffmpeg_git/libavformat/4xm.c:296:
> undefined reference to `av_new_packet'
> /home/rdp/dev/ffmpeg-windows-build-helpers/sandbox/win32/ffmpeg_git/libavformat/4xm.c:305:
> undefined reference to `av_free_packet'

Looks like this was caused by http://ffmpeg.org/trac/ffmpeg/ticket/282
so I have a work around, thanks!