Sorry I forgot to attached arch.mk file. The arch.mk is given below FCPP = cpp -P -C F90free = /usr/lib64/openmpi/bin/mpif90 -ffree-line-length-none -Wall -pedantic-errors -std=gnu -fopenmp LINK = /usr/lib64/openmpi/bin/mpif90 -fopenmp FOPTS = -g -O3 -fbacktrace -fcheck=bounds,do,mem,pointer,recursion FNOOPTS = $(FOPTS) MOD_OPT = -J INCFLAG = -I C_PARAFLAG = -DPARA CC_COMP = /usr/lib64/openmpi/bin/mpiCC -Wall -pedantic-errors -std=c++0x -fopenmp#-fopenmp C_COMP = /usr/lib64/openmpi/bin/mpicc -Wall -std=c99 -fopenmp #-fopenmp C_LINK = /usr/lib64/openmpi/bin/mpiCC -fopenmp C_OPTS = -g -O3 On Tue, Dec 17, 2019 at 12:55 AM SOUREN ADHIKARY < sourenadhikary@xxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > Respected Sir/Mam, > Kindly help to find out *FORTRAN > preprocessor *in my system (linux 18). > I am using G > *FORTRAN version {GNU Fortran (GCC) 4.8.5 20150623}. * > Basically I need 'FCPP =' flags in arch.mk file. > > Thank you in advance > >