Print all variables in a Makefile

.PHONY: printvars printvars: @$(foreach V,$(sort $(.VARIABLES)), $(if $(filter-out environment% default automatic, $(origin $V)),$(warning $V=$($V) ($(value $V)))))

Land of Lisp using SBCL instead of CLISP

Convert RNA secondary structure (in dot-bracket notation) to forest in pgf/tikz using Haskell