Include both .f and .F90 file in Fortran main file header

Question

I am using some F77 fixed format code with my F90 program. I am trying to include both kinds of code in my main program. Here\'s how I have arranged my code:

Header

Answer 1

There are compiler specific directives (not part of the standard language), for that compiler, that allow you to change the source form in use.

Place the relevant directive before the include file, and then place the other directive after the include file to switch the source form back. Perhaps:

!DEC$ NOFREEFORM
      INCLUDE 'lapack.inc'
!DEC$ FREEFORM

See http://software.intel.com/en-us/node/466230 for more information.