I'm using gcc 4.7.2 (latest stable version I think). I don't get the compilation error of the FORMAT statement but I do get the segfault error on running with the '-malign-double' switch that I reported. So it would appear that even the current stable version is buggy! As Jon said the workaround is to leave off '-malign-double': it has very little effect on performance anyway. Or use ifort (main reason I use it is past bugs in Gnu compilers).

Cheers

-- Ian

On 7 March 2013 09:44, vellieux <[log in to unmask]> wrote:

Hi Jon,

Thanks for the feedback. The version I am using (which is not that reported in the web page you mention, Version: 4:4.3.2-2) is:
GNU Fortran (GCC) 4.4.6 20120305 (Red Hat 4.4.6-4).

Hence it appears that the bug hasn't been entirely dealt with. Ian Tickle was getting segmentation faults (so he may be using gfortran V 4.3.2-2), I was only getting a binary that crashes due to a missing left parenthesis in a FORMAT statement (the parenthesis was there as far as I could see...).

Thanks again,

Fred.

On 07/03/13 10:23, Jon Agirre wrote:

Dear Fred,

I would say that you're using a buggy gfortran version
(http://lists.debian.org/debian-gcc/2009/03/msg00070.html). You may
want to check your version with 'gfortran --version' in order to be
sure of it. The '-malign-double' switch provides only a slight
optimization and as you have already proven, it may be removed with
very little impact on performance.

Cheers,

Jon

--
Fred. Vellieux (B.Sc., Ph.D., hdr)
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