Can you build a Fortran program? I.e., does the following work?
cat >hello.f90 <<EOF
program hello
print *, 'Hello world'
end program
EOF
gfortran -o hello hello.f90 && ./hello
Does `which gfortran` confirm that it's the executable you expect it to
be?
What does `gfortran -print-search-dirs` say about the locations for its
files? (Where does -lgfortran actually live?)
What does your file.path(R.home('etc'), 'Makeconf') say about the
library paths?
(Using `R CMD build` to build the package doesn't help either, right? If
yes, a faster way of reproducing the problem would be to run the
following command:
PKG_CPPFLAGS=-I/Library/Frameworks/R.framework/Versions/4.2-arm64/Resources/library/Rcpp/include
\
R CMD SHLIB *cpp
...in the src directory of your package, instead of waiting for R CMD
build to try to install the resulting source package and fail.)
--
Best regards,
Ivan
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