How to list predefined preprocessor variables with nagfor

Question

I'd like to get a list of the preprocessor variables that are predefined when using the nagfor Fortran compiler. The equivalent with gfortran is

gfortran -E -dM foo.F90

but with

nagfor -F -Wp,-dM foo.F90

I get

NAG Fortran Compiler Release 5.3(854)
fpp: warning: bad option: -dM , ignored.

I looked in the nagfor documentation and the fpp documentation but couldn't find the answer.

What I'm looking for is some variable to determine that the file is being compiled with nagfor, so the equivalent of the gfortran __GFORTRAN__, the ifort __INTEL_COMPILER and the pgf90 __PGI.

francescalus · Accepted Answer · 2018-07-27T09:13:14.967

2

Buried in the documentation for fpp I find (4.5.4 Macro definition for the release 6.2, section 5.4 of the question's linked documentation for version 5.3)

The macro NAGFOR is defined by default.

Sure enough

#ifdef NAGFOR
  print '("nagfor says hello")'
#endif
end

has the desired result when passed through the preprocessor. In my case the macro takes the value 1, but I don't know how consistent that may be.

As Themos Tsikas comments, there are also the macros __NAG_COMPILER_RELEASE and __NAG_COMPILER_BUILD which do take well-defined values.

edited Jul 27 '18 at 09:13

answered Apr 09 '15 at 16:22

francescalus

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It's documented, therefore It Will Always Work.[https://www.nag.co.uk/nagware/np/r62_doc/manual/compiler_4_0.html] – Themos Tsikas Jul 27 '18 at 09:02
Will it always have value `1`? – francescalus Jul 27 '18 at 09:04
Not necessarily, but see also [https://www.nag.co.uk/nagware/np/r62_doc/manual/compiler_4_3.html] and the __NAG_COMPILER_RELEASE and __NAG_COMPILER_BUILD macros – Themos Tsikas Jul 27 '18 at 09:06
Thanks - I've updated the answer with those other macros and the 6.2 docs. – francescalus Jul 27 '18 at 09:13

How to list predefined preprocessor variables with nagfor

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