There is no such thing as lib32-* on ARM, that is an x86-ism to provide strictly 32-bit libraries to run on 64-bit systems. The glibc package is all you need. If you're trying to build a package from AUR or elsewhere that depends on lib32-*, just drop that prefix.
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you explained very well thank you but I'd like to install GLFTPD as explained in the guide ArchLinux with reference to this link https://wiki.archlinux.org/index.php/Glftpd but I think it's impossible. thank you regards