%%% src_config
The string with \Arg{crosstch} means that option \Opt{--host} is added to \Prog{configure},
if the project is built with cross-toolchain technology, introduced since \texttt{lfs-10.0}.
In that case the configuration of project contains word \Arg{crosstch},
which is checked by \Prog{ause\_enable}.
When the project is built with earlier \Arg{tools} technology, the word \Arg{crosstch} is absent
and option \Opt{--host} is not added.

%%% src_install
The string with \Prog{ause} calls means the block after will be performed, if the project
uses installation into root prefix \File{/} and at the same time does not use \Arg{tools}
technology for tmp system.
