compilation error on Macbook pro (v10.15.7) with Catalina

[mattrichard-datascience]

ld: warning: directory not found for option '-L/usr/local/gfortran/lib/gcc/x86_64-apple-darwin18/8.2.0'
ld: warning: directory not found for option '-L/usr/local/gfortran/lib'
ld: library not found for -lgfortran
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [rmarchingcubes.so] Error 1
ERROR: compilation failed for package ‘rmarchingcubes’

[shwilks]

This looks like an error with the way your compiler is set up, it seems to be a common issue for the default mac setup not finding the fortran library. You can try and setup your default compiler to be g++ instead of clang. Alternatively the package has just been accepted to CRAN this morning so hopefully soon you can just run install.packages("rmarchingcubes").