Failed building several dependencies of VLC on aarch64

For building VLC from slackbuilds.org you have to build about 45 dependencies. Several dependencies fail to build.

Libavc1394, libdirac, schroedinger, Orbit2, libdaemon and zvbi
==============================================================
The error is:
checking build system type... Invalid configuration `aarch64-slackware-linux': machine `aarch64-slackware' not recognized
configure: error: /bin/sh .auto/config.sub aarch64-slackware-linux failed

I "solved" this by changing the configure part of the Slackbuild
"--build=$ARCH-slackware-linux" into "--build=arm-slackware-linux"
Probably this is not the way to do it, but in this way I was able to build the package.

Chromaprint
===========
For chromaprint I used https://github.com/Ponce/slackbuilds...es/chromaprint

Libmpeg2
========
After "fixing" the "error: /bin/sh .auto/config.sub aarch64-slackware-linux failed" I got:
motion_comp_arm_s.S: Assembler messages:
motion_comp_arm_s.S:1: Error: junk at end of line, first unrecognized character is `@'

x265
====
CMake Error: The source directory "/tmp/SBo/x265_3.6/source" does not exist

musepack-tools
==============
Make Generate step failed. Build files cannot be regenerated correctly.

libbonobo
=========
After "fixing" the "error: /bin/sh .auto/config.sub aarch64-slackware-linux failed" and building :OORBit2-2.14.19 I got
configure: error: Package requirements ( ORBit-2.0 >= 2.11.2 ORBit-CosNaming-2.0 >= 2.11.2 gmodule-2.0 >= 2.0.1 glib-2.0 >= 2.25.7 gobject-2.0 >= 2.25.7 gthread-2.0 >= 2.25.7 gio-2.0 >= 2.25.7) were not met:

libsidplay2
===========
After "fixing" the "error: /bin/sh .auto/config.sub aarch64-slackware-linux failed" I got:
xsid.cpp:99:5: error: narrowing conversion of ''\200'' from 'char' to 'int8_t' {aka 'signed char'} [-Wnarrowing]

Any suggestions are welcome.