Re: comment and IBM xlf

On Thu, 28 Sep 2006 18:04:39 +0000 (UTC), glen herrmannsfeldt wrote:
Markus Franke <Markus-Franke@xxxxxx> wrote:

I have Fortran 90 code and want to include a file (config.h) with
C-style comments, like /* */. When I try compile the file with IBM XLF
10.1 Compiler I get the following error messages:

I am pretty sure that the C preprocessor processes C comments, so it
seems that the compiler is looking at it before passing it to cpp.

You might try running cpp separately, and then sending the output
to XLF. I don't know if Fortran continuation lines will survive cpp,
though.

Try man cpp on a unix system.

The problem is that when xlf invokes cpp, it specifies the -C option,
which means "do not discard comments." This is controlled by the file
/etc/xlf.cfg, which contains the line

cppoptions = -C

among its default settings. Don't ask me why that was thought to be a
good idea.

I don't see a way to turn that option off on the command line, once it
has been enabled, but you can specify a different config file if you
like, perhaps something like:

grep -v cppoptions /etc/xlf.cfg >myconfig
xlf -Fmyconfig foo.F

Of course, you can also use

cpp -P foo.F foo.f
xlf foo.f

My experiments indicate that you need the -P option here, even though
it's not specified in /etc/xlf.cfg.



--
Dave Seaman
U.S. Court of Appeals to review three issues
concerning case of Mumia Abu-Jamal.
<http://www.mumia2000.org/>
.

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