Follow-up Comment #7, bug #27714 (project make):
I'm surprised you say you can do this with BSD make; I'm not aware that BSD
make has any feature like the $(shell ...) function, that can appear inside a
recipe. What syntax do you use for this in BSD make?
We can't expand the recipe in a forked version of GNU make, because the
expansion of the recipe can have side-effects (for example, if an $(eval ...)
is expanded); if the expansion happens in a forked process then those side
effects are not available in the parent.
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