#CC="clang -target x86_64-apple-macos10.15" CC="clang -arch x86_64" OBJC=$CC FC="/usr/local/gfortran/bin/gfortran -mtune=native -mmacosx-version-min=10.13" #CXX="clang++ -target x86_64-apple-macos10.15" CXX="clang++ -arch x86_64" CFLAGS="-g -O2 -Wall -pedantic -Wconversion -Wno-sign-conversion" CPPFLAGS=-I/opt/R/x86_64/include LDFLAGS=-L/opt/R/x86_64/lib R_LD_LIBRARY_PATH=/opt/R/x86_64/lib