Geeting a ld: warning: directory not found for option when trying to download R package from source

Question

I'm trying to download DESeq2 from Bioconductor, and I keep running into this issue when I have to download something from the source.

using C++ compiler: ‘Apple clang version 14.0.3 (clang-1403.0.22.14.1)’
using SDK: ‘MacOSX13.3.sdk’
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Library/Frameworks/R.framework/Versions/4.3-arm64/Resources/library/Rcpp/include' -I'/Library/Frameworks/R.framework/Versions/4.3-arm64/Resources/library/RcppArmadillo/include' -I/opt/R/arm64/include    -fPIC  -falign-functions=64 -Wall -g -O2  -c DESeq2.cpp -o DESeq2.o
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Library/Frameworks/R.framework/Versions/4.3-arm64/Resources/library/Rcpp/include' -I'/Library/Frameworks/R.framework/Versions/4.3-arm64/Resources/library/RcppArmadillo/include' -I/opt/R/arm64/include    -fPIC  -falign-functions=64 -Wall -g -O2  -c RcppExports.cpp -o RcppExports.o
clang++ -arch arm64 -std=gnu++17 -dynamiclib -Wl,-headerpad_max_install_names -undefined dynamic_lookup -L/Library/Frameworks/R.framework/Resources/lib -L/opt/R/arm64/lib -o DESeq2.so DESeq2.o RcppExports.o -L/Library/Frameworks/R.framework/Resources/lib -lRlapack -L/Library/Frameworks/R.framework/Resources/lib -lRblas -L/opt/gfortran/lib/gcc/aarch64-apple-darwin20.0/12.2.0 -L/opt/gfortran/lib -lgfortran -lemutls_w -lquadmath -F/Library/Frameworks/R.framework/.. -framework R -Wl,-framework -Wl,CoreFoundation
ld: warning: directory not found for option '-L/opt/gfortran/lib/gcc/aarch64-apple-darwin20.0/12.2.0'
ld: warning: directory not found for option '-L/opt/gfortran/lib'
ld: library not found for -lgfortran
clang: error: linker command failed with exit code 1 (use -v to see invocation)

I saw a bunch of other threads that ran into the same problem, but I wasn't able to fix my issue. I downloaded gcc through homebrew, and I downloaded gfortran separately too. I'm trying to create a symlink like this thread says. I modified it to essentially have it link to the executable for gcc-13, using this command:

sudo ln -sf /opt/homebrew/Cellar/gcc/13.2.0/bin/gcc-13 /usr/local/bin/gcc

I also created a .R folder and inside created a Makevars file, with this as the contents

VER=-13
CC=gcc
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/opt/homebrew/Cellar/gcc/13.2.0/lib/gcc/13

One thing for this is that I do not know if this file is actually being used or not. But when I go to install the package, it outputs the same error, so I'm not entire sure what is going on. Thank you so much for your help!