But the repositories are not so well stocked, I find many deficiencies even in the most used tools and having to install from other sources immediately gives problems
checking whether make supports the include directive... no
checking for gcc... no
checking for cc... no
checking for cl.exe... no
checking for clang... no
configure: error: in `/home/ivan76/.cache/yay/asunder/src/asunder-3.0.1':
configure: error: no acceptable C compiler found in $PATH
See `config.log' for more details
==> ERRORE: Si è verificato un errore in build().
L'operazione sta per essere interrotta...
-> errore durante la creazione: asunder-exit status 4
controllo delle dipendenze in corso...
Pacchetti (2) intltool-0.51.0-6 pkgconf-2.4.3-1
The information applies to Manjaro as well - with the caveat that not everything will work in Manjaro stable branch, as it’s software versions are often not the same as in Arch or in Manjaro testing or unstable.
With the prerequisites in place, it builds and installs flawlessly (Manjaro stable branch).
Please see the following links concerning the AUR;
The first link demonstrates how to setup and use the AUR in Manjaro. The second, is a deep dive into your responsibilities when using the AUR, plus much more information you might not have been previously aware of.