Re: "make pdf" fails on macOS due to incompatibility of echo

[Jun T <tak...@kb...>]

> 2022/12/16 5:16、Ethan A Merritt <me...@uw...>のメール:
> 
> The various Makefile.am rules in other subdirectories also
> use "echo" rather than "printf".   Was this rule the only
> point of failure?

In other Makefile.am, argumens of echo do not contain
backslash(es); so I think there should be no portability
problem.