Error when gfortran is used for package installation from source

 MacOSX 15.3

gcc installed using MacBrew

I get this error:

ld: warning: search path '/opt/gfortran/lib/gcc/aarch64-apple-darwin20.0/12.2.0' not found

ld: warning: search path '/opt/gfortran/lib' not found

ld: library 'gfortran' not found

I solve it by creating a ~/.R/Makevars file like this:

FC      = /opt/homebrew/opt/gfortran/bin/gfortran

F77     = /opt/homebrew/opt/gfortran/bin/gfortran

FLIBS   = -L/opt/homebrew/opt/gfortran/lib


Now I can compile package with gfortran

If it does not find the libintl.h header, for example when install robustbase package, use:

brew install gettext
cd /opt/R/arm64/include/
sudo ln -s /opt/homebrew/include/libintl.h libintl.h

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