Hi I am new to Bioconductor and I am trying to install easyRNASeq and DESeq2 but neither will install because the version of mgcv available is 1.8-33. It needs to be updated to 1.8-34. I tried to do this but keep getting the error below. Any advice on how to get this debugged?

> install.packages("mgcv")

  There is a binary version available but the source version is later:
     binary source needs_compilation
mgcv 1.8-33 1.8-34              TRUE

Do you want to install from sources the package which needs compilation? (Yes/no/cancel) yes
installing the source package ‘mgcv’

trying URL 'https://cran.rstudio.com/src/contrib/mgcv_1.8-34.tar.gz'
Content type 'application/x-gzip' length 1149538 bytes (1.1 MB)
==================================================
downloaded 1.1 MB

* installing *source* package ‘mgcv’ ...
** package ‘mgcv’ successfully unpacked and MD5 sums checked
** using staged installation
** libs

clang -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG   -I/usr/local/include   -fPIC  -Wall -g -O2  -c coxph.c -o coxph.o
clang -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG   -I/usr/local/include   -fPIC  -Wall -g -O2  -c davies.c -o davies.o
clang -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG   -I/usr/local/include   -fPIC  -Wall -g -O2  -c discrete.c -o discrete.o
clang -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG   -I/usr/local/include   -fPIC  -Wall -g -O2  -c gdi.c -o gdi.o
clang -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG   -I/usr/local/include   -fPIC  -Wall -g -O2  -c init.c -o init.o
clang -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG   -I/usr/local/include   -fPIC  -Wall -g -O2  -c magic.c -o magic.o
clang -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG   -I/usr/local/include   -fPIC  -Wall -g -O2  -c mat.c -o mat.o
clang -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG   -I/usr/local/include   -fPIC  -Wall -g -O2  -c matrix.c -o matrix.o
clang -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG   -I/usr/local/include   -fPIC  -Wall -g -O2  -c mgcv.c -o mgcv.o
clang -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG   -I/usr/local/include   -fPIC  -Wall -g -O2  -c misc.c -o misc.o
clang -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG   -I/usr/local/include   -fPIC  -Wall -g -O2  -c mvn.c -o mvn.o
clang -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG   -I/usr/local/include   -fPIC  -Wall -g -O2  -c qp.c -o qp.o
clang -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG   -I/usr/local/include   -fPIC  -Wall -g -O2  -c soap.c -o soap.o
clang -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG   -I/usr/local/include   -fPIC  -Wall -g -O2  -c sparse-smooth.c -o sparse-smooth.o
clang -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG   -I/usr/local/include   -fPIC  -Wall -g -O2  -c sparse.c -o sparse.o
clang -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG   -I/usr/local/include   -fPIC  -Wall -g -O2  -c tprs.c -o tprs.o

clang -dynamiclib -Wl,-headerpad_max_install_names -undefined dynamic_lookup -single_module -multiply_defined suppress -L/Library/Frameworks/R.framework/Resources/lib -L/usr/local/lib -o mgcv.so coxph.o davies.o discrete.o gdi.o init.o magic.o mat.o matrix.o mgcv.o misc.o mvn.o qp.o soap.o sparse-smooth.o sparse.o tprs.o -L/Library/Frameworks/R.framework/Resources/lib -lRlapack -L/Library/Frameworks/R.framework/Resources/lib -lRblas -L/usr/local/gfortran/lib/gcc/x86_64-apple-darwin18/8.2.0 -L/usr/local/gfortran/lib -lgfortran -lquadmath -lm -F/Library/Frameworks/R.framework/.. -framework R -Wl,-framework -Wl,CoreFoundation
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: *** [mgcv.so] Error 1
ERROR: compilation failed for package ‘mgcv’
* removing ‘/Library/Frameworks/R.framework/Versions/4.0/Resources/library/mgcv’
* restoring previous ‘/Library/Frameworks/R.framework/Versions/4.0/Resources/library/mgcv’
Warning in install.packages :
  installation of package ‘mgcv’ had non-zero exit status

The downloaded source packages are in
    ‘/private/var/folders/xb/x046hrrd33xgqr1nlkrp5zs00000gq/T/RtmpCtCY2M/downloaded_packages’