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Message from discussion It is a bug of lapack 3.2 or of gfortran ?
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Tim Prince  
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 More options Dec 19 2008, 2:18 am
Newsgroups: comp.lang.fortran
From: Tim Prince <tpri...@nospamcomputer.org>
Date: Thu, 18 Dec 2008 23:18:28 -0800
Local: Fri, Dec 19 2008 2:18 am
Subject: Re: It is a bug of lapack 3.2 or of gfortran ?
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hes selex wrote:
> my make.inc :

> FORTRAN = gfortran
> LOADER = $(FORTRAN)
> OPTS = -fbounds-check
> DRVOPTS = $(OPTS)
> NOOPT =
> LOADOPTS = -fbounds-check

> when make lapack_testing (after make blaslib ,make lib),
> $./xlintsts < stest.in > stest.out
> At line 47 of file ilaslr.f
> Fortran runtime error: Array reference out of bounds for array 'a',
> lower bound of dimension 1 exceeded (0 < 1)

47:       IF( M.EQ.0 .OR. A(M, 1).NE.ZERO .OR. A(M, N).NE.ZERO ) THEN
48:          ILASLR = M
49:       ELSE
must be changed to something like
47:       IF( M == 0 ) THEN
48:          ILASLR = M
48a:       ELSEIF( A(M, 1) /= ZERO .OR. A(M, N) /= ZERO ) THEN
48b:          ILASLR = M
49:       ELSE
in order to comply with standard.  If this were translated by f2c, it
would be correct C, but Fortran doesn't have a shortcut rule like C for
compound logical expressions.  It is entirely legitimate for a compiler to
evaluate each part of the logical expression simultaneously, so as to
speed it up, producing the reported violation.

 
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