Release Notes: The documentation was rewritten in an attempt at lucidity. There were many small enhancements and bugfixes.
Release Notes: The mechanism for calling rules that return values ("[ rule args ...]" and 'return' in the rule body) is now a documented part of the language. The "on target rulename field1 ..." syntax was added to invoke a rule under the influence of a target's specific variables. "[ on target rulename ... ]" was added to call a rule returning a value under the influence of a target's specific variables. A new 'Glob' builtin that returns a list of files, given a list of directories, and a list of filename patterns was added. The new :E=value modifier provides a default value if variable unset.