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[Bug fortran/41831] Bug with management of NaNs
- From: "kargl at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 26 Oct 2009 22:39:54 -0000
- Subject: [Bug fortran/41831] Bug with management of NaNs
- References: <bug-41831-18358@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #2 from kargl at gcc dot gnu dot org 2009-10-26 22:39 -------
> My conclusion is that there is a problem when the
> NAN is passed from the C to the fortran.
That's not my conclusion. :)
> double C2F(returnanan)(void)
> {
(snip)
>
> PROGRAM test
> DATA ONE/1.0D0/
> DOUBLE PRECISION X
> X = returnanan()
Add 'IMPLICIT NONE' to your code. The Fortran code is
expecting has implicitly typed returnanan() as REAL.
Your C code has declared returnanan() to return a double.
C's double is not the same thing as Fortran's REAL.
--
steve
--
kargl at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |INVALID
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41831