It is written in Perl, a programming language and commonly used with autoconf, another GNU tool.
See also: autoconf, imake[?]
... Hepworth Museum[?], St. Ives, Cornwall Penlee House, Penzance[?] Tate St. Ives[?] Cumbria Abbot Hall Art Gallery[?], Kendal[?] Beatrix Pott ...