Let me start off by says I am not a programmer. I am an SA who installed the Intel suite of compiler. I have a little HelloWorld program that I installed. Do the Intel compilers still use the gfortran that is on the system?
mpif90 -o intel-f90 intel-impi-hello.f90
[ramos@sandy ~]$ ldd intel-f90
linux-vdso.so.1 => (0x00007ffe43da5000)
libmpifort.so.12 => /software/depot/xe_2017-update-1/compilers_and_libraries_2017.1.132/linux/mpi/intel64/lib/libmpifort.so.12 (0x00002b6c78821000)
libmpi.so.12 => /software/depot/xe_2017-update-1/compilers_and_libraries_2017.1.132/linux/mpi/intel64/lib/libmpi.so.12 (0x00002b6c78bca000)
libdl.so.2 => /lib64/libdl.so.2 (0x000000353ee00000)
librt.so.1 => /lib64/librt.so.1 (0x000000353fa00000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x000000353f200000)
libgfortran.so.3 => /usr/lib64/libgfortran.so.3 (0x00002b6c798f6000)
libm.so.6 => /lib64/libm.so.6 (0x000000353f600000)
libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x0000003541200000)
libc.so.6 => /lib64/libc.so.6 (0x000000353ea00000)
/lib64/ld-linux-x86-64.so.2 (0x000000353e600000)
[ramos@sandy ~]$