From type/Compiler

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method verbose-config(:$say)

If $say is True, it prints the different items included in the configuration of the compiler; if it is not, returns a Hash with the same information.

say $*RAKU.compiler.verbose-config; # OUTPUT: «distro::auth=https://www.opensuse.org/␤distro::desc=2018-05-06T09:19:17.571307+02:00␤» ... And the rest of the configuration

See Also: Systemic