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Compatibility between FTN95 and Intel Fortran

 
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jcherw



Joined: 27 Sep 2018
Posts: 56
Location: Australia

PostPosted: Thu May 20, 2021 10:52 am    Post subject: Compatibility between FTN95 and Intel Fortran Reply with quote

I have a large code that has been compiled with Intel Fortran and GNU Fortran but has 2 issues that FTN95 flags as an error. GFortran prompted me to use the FDEC flag as the code apparently contained nun-standard statements inherited from DEC Fortran.

The first issue is the following object definition

type, public :: sparsematrix
__integer :: nrow
__integer :: ncol
__integer :: nnz
__type(rowtype),allocatable,dimension(Smile :: row
___CONTAINS
___procedure :: init => initialize
___procedure :: addconnection
___procedure :: filliaja
___procedure :: sort
___procedure :: destroy
end type sparsematrix

Note that I added underscores to maintain indentation.

this results in a compile error 515 - CONTAINS is invalid in the definition of a derived TYPE

I have no experience with this type of object definition, and would much appreciate it if someone could indicate how to resolve this error/

The other issue is the use of 'SHARED' in a file open statement

OPEN(UNIT=IU,FILE=FNAME(1:IFLEN),FORM=FMTARG,SHARED,
1 ACCESS=ACCARG,STATUS=FILSTAT,ACTION=FILACT,ERR=2000)

This gives the following compile error 529 - Non-keyword specifiers must appear before keyword specifiers.

The offending part is 'SHARED' in the first line and if I remove it, the code compiles fine.

Is my assumption correct that this is non-standard Intel/Dec Fortran? and if so, is there an equivalent valid statement for FTN95?

Thanks,
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PaulLaidler
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Joined: 21 Feb 2005
Posts: 7142
Location: Salford, UK

PostPosted: Thu May 20, 2021 11:20 am    Post subject: Reply with quote

jcherw

CONTAINS within a TYPE declaration is part of a Fortran 200x standard but not yet implemented in FTN95.

I think that SHARED is non-standard. It is not implemented in FTN95.

FTN95 has SHARE=<access mode> where <access mode> is one of "COMPAT", "DENYRW" etc.
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