See the README

Undocumented predicates

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

 disable_backtrace

 call_without_backtrace(Arg1)

 build_default

 build_default(Arg1)

 halt_success

 halt_error

 bind_special_variables(Arg1)

 start_queue(Arg1)

 build(Arg1)

 build(Arg1, Arg2)

 build(Arg1, Arg2, Arg3)

 finish_queue(Arg1)

 report(Arg1, Arg2, Arg3)

 report(Arg1, Arg2, Arg3, Arg4)

 verbose_report(Arg1, Arg2, Arg3)

 verbose_report(Arg1, Arg2, Arg3, Arg4)

 consult_gnu_makefile(Arg1, Arg2, Arg3)

 consult_makeprog(Arg1, Arg2, Arg3)

 read_makeprog_stream(Arg1, Arg2, Arg3, Arg4)

 read_string_as_makeprog_term(Arg1, Arg2, Arg3)

 read_atom_as_makeprog_term(Arg1, Arg2, Arg3)

 eval_atom_as_makeprog_term(Arg1, Arg2, Arg3)

 add_spec_clause(Arg1, Arg2, Arg3)

 add_spec_clause(Arg1, Arg2, Arg3, Arg4)

 add_cmdline_assignment(Arg1)

 add_gnumake_clause(Arg1, Arg2, Arg3)

 global_binding(Arg1, Arg2)

 expand_global_binding(Arg1, Arg2)

 target_bindrule(Arg1, Arg2, Arg3)

 rebuild_required(Arg1, Arg2, Arg3, Arg4)

 normalize_pattern(Arg1, Arg2, Arg3)

 unwrap_t(Arg1, Arg2)

 flatten_trim(Arg1, Arg2)

 rule_target(Arg1, Arg2, Arg3)

 rule_dependencies(Arg1, Arg2, Arg3)

 rule_execs(Arg1, Arg2, Arg3)

 rule_vars(Arg1, Arg2, Arg3, Arg4, Arg5, Arg6)

 run_execs_now(Arg1, Arg2, Arg3)

 report_run_exec(Arg1, Arg2, Arg3, Arg4)

 update_hash(Arg1, Arg2, Arg3)

 shell_var_specified(Arg1)

 bindvar(Arg1, Arg2, Arg3)

 bindvar_rule(Arg1, Arg2, Arg3, Arg4)

 expand_vars(Arg1, Arg2)

 expand_vars(Arg1, Arg2, Arg3)