Changing compiler options inside the code

[van_der_merwe__ben]

We are using the latest Intel Fortran compiler under Windows. Is it possible to override command line compiler options inside the code? Suppose you have:

ifort.exe @x.fcf x.for y.for z.for etc.for

And x.fcf contains some general options e.g./check:uninit

Now for a particular file I want to be able to turn this option off because it trips incorrectly under some conditions, via something like this (insde the Fortran source code file)

!DEC$ IF DEFINED(TESTFORCEHIGH64)

!DEC$ turn of check uninit how?

!DEC$ ENDIF

Is there a way to do this?

[Steven_L_Intel1]

There are very few command-line options you can change from within the code - /check:uninit is not among them. Here are the things you can change:

- Alignment within data structures
- Alignment of individual variables
- Whether or not alignment warnings are produced
- Whether or not source is treated as fixed-form or free-form

[mecej4]

A word of caution, to add to what Dr. Fortran advised: Fortran compiler options may be specified in the command line, makefile, the configuration file (default ifort.cfg or alternative, controlled by environment variable IFORTCFG) and in the source.

If conflicting options are given or different alternatives are specified for a repeated option, rules of precedence will apply, as described in the Intel Fortran documentation. You may want to make sure that you understand how these rules work before using options in more than one place.