libtheora fails to compile on aarch64

[Felixkruemel]

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I think the detect script is too old ;) Nearly 20 years ago ARM wasn't a thing.

building libtheora
=======================
Downloading https://ftp.osuosl.org/pub/xiph/releases/theora/libtheora-1.1.1.tar.gz as libtheora-1.1.1.tar.gz
... Done
Extracted libtheora-1.1.1.tar.gz
$ ./configure --prefix=/app/workspace --with-ogg-libraries=/app/workspace/lib --with-ogg-includes=/app/workspace/include/ --with-vorbis-libraries=/app/workspace/lib --with-vorbis-includes=/app/workspace/include/ --enable-static --disable-shared --disable-oggtest --disable-vorbistest --disable-examples --disable-asm --disable-spec
checking build system type... ./config.guess: unable to guess system type

This script, last modified 2002-07-23, has failed to recognize
the operating system you are using. It is advised that you
download the most up to date version of the config scripts from

    ftp://ftp.gnu.org/pub/gnu/config/

If the version you run (./config.guess) is already up to date, please
send the following data and any information you think might be
pertinent to <[email protected]> in order to provide the needed
information to handle your system.

config.guess timestamp = 2002-07-23

uname -m = aarch64
uname -r = 5.4.0-1045-oracle
uname -s = Linux
uname -v = #49-Ubuntu SMP Mon May 3 05:27:18 UTC 2021

/usr/bin/uname -p = aarch64
/bin/uname -X     =

hostinfo               =
/bin/universe          =
/usr/bin/arch -k       =
/bin/arch              = aarch64
/usr/bin/oslevel       =
/usr/convex/getsysinfo =

UNAME_MACHINE = aarch64
UNAME_RELEASE = 5.4.0-1045-oracle
UNAME_SYSTEM  = Linux
UNAME_VERSION = #49-Ubuntu SMP Mon May 3 05:27:18 UTC 2021
configure: error: cannot guess build type; you must specify one