On 10/30/2017 2:22 PM, Doug McIlroy wrote:
Does anyone know offhand whether m4 optimizes tail calls (i.e. discards the 
calling
stack frame)?

Two thoughts:

 * The original authors were very hip to recursion, they were into Prolog.
 * I'll bet you reading the source code would answer your question :)

--
Jack J. Woehr     # Science is more than a body of knowledge. It's a way of
www.well.com/~jax # thinking, a way of skeptically interrogating the universe
www.softwoehr.com # with a fine understanding of human fallibility. - Carl Sagan

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