R package 安裝：ld：警告：找不到選項“-L/usr/local/gfortran/lib”的目錄

Question

我正在嘗試從源代碼安裝 R package：

圖

這是我的命令：

install.packages('igraph_1.2.4.tar.gz', repos = NULL, type="source")

但我收到以下錯誤：

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: 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: *** [igraph.so] Error 1
ERROR: compilation failed for package ‘igraph’
* removing ‘/Library/Frameworks/R.framework/Versions/4.0/Resources/library/igraph’
* restoring previous ‘/Library/Frameworks/R.framework/Versions/4.0/Resources/library/igraph’

Answer 1

全新安裝 R 后，我必須手動更改/Library/Frameworks/R.framework/Resources/etc/Makeconf中的FLIBS變量以指向 gcc 庫。

此外，這里的帖子也有幫助： https://medium.com/biosyntax/following-up-library-dependency-when-compiling-r-packages-89f191b9f227

該帖子詳細建議更改Makeconf中的以下條目（確保您在系統上使用正確的版本）：

# Use Homebrew gcc for OpenMP support
CC = gcc-8
# CC = clang # Original setting
...
# Use Homebrew gcc for OpenMP support
CXX = g++-8
# CXX = clang++ # Original setting
...
# Ask R to find the Homebrew copy of gcc
FLIBS = -L/usr/local/lib/gcc/8/gcc/x86_64-apple-darwin17.5.0/8.1.0 -L/usr/local/lib/gcc/8 -lgfortran -lquadmath -lm
# The original one
# FLIBS =  -L/usr/local/gfortran/lib/gcc/x86_64-apple-darwin15/6.1.0 -L/usr/local/gfortran/lib -lgfortran -lquadmath -lm

修改后無需重啟Rstudio。