[FFmpeg-trac] #10219(undetermined:new): error undefined reference - crosscompiling for i686 & x86_64

[FFmpeg]

#10219: error undefined reference - crosscompiling for i686 & x86_64
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             Reporter:  th0ma7  |                    Owner:  (none)
                 Type:  defect  |                   Status:  new
             Priority:  normal  |                Component:  undetermined
              Version:  5.1.2   |               Resolution:
             Keywords:          |               Blocked By:
             Blocking:          |  Reproduced by developer:  0
Analyzed by developer:  0       |
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Comment (by th0ma7):

 Found where the issue is, our spksrc framework uses ARCH variable which
 superseeds value of ARCH in configure script & ffbuild/common.mak

 Renaming that variable to FFMPEG_ARCH using a simple patch fixes things
 (patch I already used since a long time part of our ffmpeg4 build process)
 https://github.com/SynoCommunity/spksrc/blob/master/cross/ffmpeg/patches/0001
 -replace-arch-env-by-ffmpeg_arch.patch
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Ticket URL: <https://trac.ffmpeg.org/ticket/10219#comment:4>
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