Re: [Plplot-devel] Avoiding untyped variables in our Fortran binding and examples

[Arjen M. <Arj...@de...>]

Hi Alan,



> -----Original Message-----
> From: Alan W. Irwin [mailto:ir...@be...]
> Sent: Thursday, May 12, 2016 11:30 AM
> Thanks for clearing up that nomenclature.  It appears then, that the ifort and NAG
> fortran compiler options I found concerned the wrong problem (undefined variable).
> What we need instead is a check of our Fortran binding and Fortran examples code
> for any variable without an explicit declaration, i.e., the easier problem.  Presumably,
> if you put "implicit none" in all the right places, it should detect any such issues, but
> finding all those right places strikes me as an error-prone process so to double-
> check that I hope you are able to find and use a compiler option to check for
> variables that are not explicitly declared for either the ifort or NAG Fortran compilers.
> As far as I can tell, gfortran does not have such an option.
>
For Intel Fortran the option is /warn:declarations (on Windows) or -warn:declaration (on Linux/OSX). Gfortran does have such an option: -Wimplicit, but I guess -Wall will enable it as well. According to the documentation the NAG compiler uses the option -u for this. (Key to these morsels of wisdom: "implicit"). So this issue is indeed covered.

Regards,

Arjen

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