How to update a package that has StanHeaders and rstan in its LinkingTo, part II

Interfaces RStan
4

There is not. Another package maintainer emailed me to say that my proposal did not work without extra \ on a Mac. Using

STANHEADERS_SRC = $(shell "$(R_HOME)/bin$(R_ARCH_BIN)/Rscript" -e "message()" -e "cat(system.file('include', 'src', package = 'StanHeaders', mustWork = TRUE))" -e "message()" | grep "StanHeaders")

also works for me and likely wherever sep = '\n' would not.