How to install/locate R.h and Rmath.h header files?

Question

I am trying to compile some C code (called rand_beta) in terminal which contains the lines to include R.h and Rmath.h header files using gcc -o rand_beta rand_beta.c

Answer 1

Another way is to specify some environment variables to directly use the include path:

export CPATH=/usr/lib64/R/include/
export C_INCLUDE_PATH=/usr/lib64/R/include/
export CPLUS_INCLUDE_PATH=/usr/lib64/R/include/
export GCC_INCLUDE_DIR=/usr/lib64/R/include/

This should then run fine:

gcc -o rand_beta rand_beta.c