Well, this would break a lot of already set up automatic builds unexpectedly. Obviously without having read this and actually doing the following "do not forgot to put actual tar.xz in thirdparty/src while testing", it fails on all 4 of the computers I ran it on (just for verification purposes).
This is REALLY strange.
It worked on my 64-bit chroot, main i586 system, ubuntu 16.04 vm and termux.
Are you sure you get patch right?
Can you show us some of failures?
I am not *insisting* on this mod, just found it strange that it worked for me and failed for you so hard.
I did update "bld.sh" to mention the need to update nasm and cmake if needed on older computers and added that to the Manual to be checked in. I finally updated nasm on Ubuntu16 and Fedora32 and seen how wasy it is if you just go to the releases directory of each, download the version you want, and compile it as provided in the instructions.
More experimental patch, but I tested it on Rosa 2016 with renamed
/usr/bin/nasm to _nasm, and build finished, and av1 video test decoded
ok
do not forgot to put actual tar.xz in thirdparty/src while testing this