- XDR, rpcgen (on Linux these are provided by glibc)
-- pcre (Perl Compatible Regular Expressions C library)
+- pcre (Perl Compatible Regular Expressions C library) (optional)
-- libmagic (the library that corresponds to the 'file' command)
+- libmagic (the library that corresponds to the 'file' command) (optional)
-- libvirt
+- libvirt (optional)
-- libxml2
+- libxml2 (optional)
-- Augeas (http://augeas.net/)
+- Augeas (http://augeas.net/) (optional)
+
+- gperf
- squashfs-tools (mksquashfs only)