Looks like something's missing, I don't know what. Notice the undefined reference errors like
convert.cc:(.text.ARGBToI420+0xf0): undefined reference to
`ARGBToUVRow_SVE2'
ld: convert.cc:(.text.ARGBToI420+0xf8): undefined reference to
`ARGBToUVRow_SVE2'
When everything is happy those will go away. There may be others but they're usually fatal (can't compile until you fix them). Can you run the configure script over again if you have
one and work on the errors in that first? Something got left out.
FWIW I haven't had my aarch64 debian working in a year or so. Oops, this is the NetBSD group, same stuff applies.