GCC 8.4 and Clang 13.0.1:
`cc1: note: unrecognized command-line option ‘-Wno-deprecated-non-prototype’ may have been intended to silence earlier diagnostics`
Addendum to commit 4e3bf252d
mkisofs and its components uses K&R-style function definitions
to support very old compilers. Modern compilers consider K&R syntax
to be deprecated. Clang therefore emits a large number of warnings
over this.
For some bizarre reason ARM toolchains have some peculiar issues with various va_arg macros,
as this is not the first time one of these is problematic (though I don't remember the previous one,
it was a long, long time ago ™️).. They always seem to expect va_list as an argument though, so
let's make them happy and by extension make ros-tools compile on Linux/ARM(64) compile again!
