Installing R 3.5.0 with --enable-R-shlib - r

Question

I am trying to install R 3.5.0 from source with the flag --enable-R-shlib under Linux Mint. Configuring and installing it without the flag works fine, but RStudio requires the flag to be set. However, when running
./configure --enable-R-shlib
make
I get the error
/usr/bin/ld: CommandLineArgs.o: relocation R_X86_64_32 against `.rodata.str1.1' can not be used when making a shared object; recompile with -fPIC
CommandLineArgs.o: error adding symbols: Bad value
collect2: error: ld returned 1 exit status
Makefile:177: recipe for target 'libR.so' failed
make[3]: *** [libR.so] Error 1
make[3]: Leaving directory '/home/hps/Downloads/R-3.5.0/src/main'
Makefile:135: recipe for target 'R' failed
make[2]: *** [R] Error 2
make[2]: Leaving directory '/home/hps/Downloads/R-3.5.0/src/main'
Makefile:28: recipe for target 'R' failed
make[1]: *** [R] Error 1
make[1]: Leaving directory '/home/hps/Downloads/R-3.5.0/src'
Makefile:60: recipe for target 'R' failed
make: *** [R] Error 1
I tried setting the -fPIC flag as mentioned in the error message following the advice from [1]
CC="gcc -fPIC" ./configure --enable-R-shlib
to no avail, I still get the same error message.
[1] Passing a gcc flag through makefile

Answer 1

After adding these PPAs for Ubuntu, I was able to update R to 3.5.0 for my Linux Mint 17.3 Rosa.
sudo add-apt-repository ppa:marutter/rrutter3.5
sudo add-apt-repository ppa:marutter/c2d4u
sudo apt-get update
Ref: https://cran.r-project.org/bin/linux/ubuntu/
Edit: To compile from source, follow the suggestion here
sudo apt-get update
sudo apt-get build-dep r-base
wget https://cran.r-project.org/src/base/R-3/R-3.5.0.tar.gz
tar -xvf R-3.5.0.tar.gz
cd R-3.5.0
./configure --enable-R-shlib
make

Answer 2

Just in case someone else runs into this problem.
The issue is the object files ".o" are already compiled without the -fpic option.
The proper solution is to remove the object files from the first build and recomplile:
make clean
./configure --enable-R-shlib
make -j 4
sudo make install
The -j 4 tells make to spawn four compile processes at a time. Adjust the number to match the number of processor cores.