Cannot find preprocessor for Fortran when installing Octopus 9.1 software package

by Statsar   Last Updated October 20, 2019 04:01 AM

I am trying to install Octopus 9.1 program on MacOSX by following the instructions given here I have made sure I have all the required libraries installed before installing this program. I also set some recommended environment variables beforehand, using gfortran as my fortran compiler,

export FC=gfortran

export FCFLAGS="-march=athlon64 -msse2 -mfpmath=sse -malign-double -funroll-loops -O3".

The above flags are what is recommended here. Then when running the configure script I got this error: configure: error: Could not find preprocessor usable for Fortran. I look at the preprocessor page of that wiki and it says that the preprocessor is controlled by FCCPP variable and for MacOS the recommended value is clang -E -ansi. Setting this variable and running the configure script again does not get rid of the error.

Tags : configure

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