SWI-Prolog Did You Know Did you know? the first Prolog interpreter was in Algol-W by Philippe Roussel (1972) Search Documentation:
Pack plmake -- prolog/biomake/gnumake_parser.pl
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Undocumented predicates

The following predicates are exported, but not or incorrectly documented.

 parse_gnu_makefile(Arg1, Arg2, Arg3, Arg4)
 eval_gnu_makefile(Arg1, Arg2, Arg3, Arg4)