profiling question

[Mike Corbeil]

Senti wrote:
 
Hi 1.
Does anyone know how -ax option of gcc works ? 2.
If yes, what -ax expects from me and what it gives back (in terms of output)
? 3. I remember i found some
3 sentences about that once, but i don't remember where .If anyone knows
where i can find something about that please reply.   Thanks
in advance Adrian


The gcc man page should describe all related  options.  If
you're working on either a Unix or Linux platform, then it's easy to access
man pages and in case you don't know how, then it's

        % man gcc

% represents the prompt symbol on the command line and could be % or
$ or something else, what ever it's been defined as.

If the gcc man page doesn't contain the information you're looking for,
then check through the gnu gcc web site, where there should be documentation
covering your question.  www.gnu.org is the correct url, I believe. 
You might want or need to do this if you're not working on Unix or Linux.

I just checked the man page for gcc 2.7.2.3 on my Linux system, and
this is an older gcc than the one you're working with, but the man page
explains the -a and -x options.  -a is a debug option, takes no arguments,
and is used to generate extra code for profiling.  -x is a language
specification option and can take an argument, but one isn't required if
you want the language to default based on the filename extensions or suffixes,
such as .c for example.

See the man page for more information on these options, because I didn't
include all of it.

If the man page has been maintained and these options are the same across
these versions of gcc, then I believe that you should find all you need
to know about these options from the man page.  Then, it's a question
of whether the man page description is entirely consistent with the implementation
of gcc being used, and if it's not, then produce a bug report explaining
your findings.

mike
 
 
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