Mac上Rstudio安裝套件時出現gfortran相關的ld warning, library not found for -lxxx

在Mac上的Rstudio安裝套件的時候出現類似下列錯誤：

gfortran-4.8   -fPIC  -g -O2  -c mclust.f -o mclust.o
gfortran-4.8   -fPIC  -g -O2  -c mclustaddson.f -o mclustaddson.o

ld: warning: directory not found for option '-L/usr/local/lib/gcc/x86_64-apple-darwin13.0.0/4.8.2'
ld: warning: directory not found for option '-L/usr/local/lib/gcc/x86_64-apple-darwin13.0.0/4.8.2'
ld: library not found for -lquadmath

clang: error: linker command failed with exit code 1 (use -v to see invocation) 

上述問題在macOS Big Sur (11.6.5)上面的做法是去更新 ~/.R/Makevars

VER=-8
CC=gcc$(VER)
CXX=g++$(VER)
CXX11=g++$(VER)
CXX14=g++$(VER)
CXX17=g++$(VER)
CFLAGS=-mtune=native -g -O2 -Wall -pedantic -Wconversion
CXXFLAGS=-mtune=native -g -O2 -Wall -pedantic -Wconversion
FLIBS=-L/usr/local/Cellar/gcc/8.2.0/lib/gcc/8

參考資料

• Mac OS X R error "ld: warning: directory not found for option"

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Concept art for a post-apocalyptic world with ruins, overgrown vegetation, and a lone survivor.

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