Defaults

For -compat=4, if -library is not specified, -library=%none,libC.The libC library always is included unless specifically excluded using -library=%none or -library=no%libC.

For -compat=5, if -library is not specified, -library=%none,Cstd,Crun.The libCstd library always is included unless specifically excluded using -library=%none or -library=no%Cstd. The libCrun library always is included unless specifically excluded using -library=no%Crun.