Fortran 90

Toon Moene toon@moene.indiv.nluug.nl
Tue Sep 30 23:06:00 GMT 2003


Prof. M.B. Patil wrote:
> 
> g77 provides an array bounds check compiler option (-f-bounds-check).
> However, this does not work with the f77 code obtained by translating
> an f90 program with VAST90. (It catches every allocatable array!)

I've never used VAST90 myself, so I have to be guessing here, but it 
could well be that in the translation of Fortran 90 -> Fortran 77 VAST90 
relies on tricks that violate array bounds.

As there is no equivalent of allocatable arrays in Fortran 77, it 
probably uses a common block to "allocate" them and use a bogus size in 
most instances (and having a really big common block in one place in the 
program).

As I said, just guessing.

Hope this helps,

-- 
Toon Moene - mailto:toon@moene.indiv.nluug.nl - phoneto: +31 346 214290
Saturnushof 14, 3738 XG  Maartensdijk, The Netherlands
Maintainer, GNU Fortran 77: http://gcc.gnu.org/onlinedocs/g77_news.html
GNU Fortran 95: http://gcc-g95.sourceforge.net/ (under construction)



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