How do I compile this Fortran code with new 2017 ifort?

Question

I have the following fortran code that compiles with pre 2017 ifort:

program parallel_m
contains
   character(500) function PARALLEL_message(i_ss)
     character         


        

Answer 1

Your program is illegal Fortran after the preprocessing because the // is interpretted as a C comment.

Simply do not use icc but ifort. Ifort is for Fortran, icc is for C. Ifort uses a different preprocessor fpp which does not discard //.