Major.Minor[[.Patch][[-GitRev],-GitHash]]]

Example strings are '8.5', '8.5.0', '8.5.0-50', '8.5.0-69-gad38e8ad8`. The last two require fetching the sources from git or using the Windows daily builds.

Features is a list of required or preferred features. Individual features are:

warning(Feature)

Only print a warning instead of throwing an error.

threaded

Demand support for multi-threading

rational

Demand native support for rational numbers

library(Lib)

Demand library(Lib) to be present. Thde library not being there may indicate an incomplete installation. For example library(pce) to demand xpce graphics support.

Flag

Demand current_prolog_flag(Flag, true) to be true.

FlagValue

If FlagValue is Flag(Value), demand current_prolog_flag(Flag, Value) to be true.

Errors

- prolog_version(Required, Found)

- prolog_feature(Feature))