Check with and without specific preprocessor symbols

[matttbe]

Hello,

First, thank you for developing and maintaining this great open-source tool!

I maybe missed that in the documentation but is there a way to analyse the code with and without some specific preprocessor symbols?

I know that I can use -D and -U and if I don't use any, cppcheck will try different configurations.
I can still force cppcheck to look at different configurations by using --force or --max-configs options. But if I include some headers from /usr/include, I don't want to use these options as it will look at "generic" preprocessor symbols. Is there a way to select these preprocessor symbols?

Here is an example:

#ifdef B
    w = B;
#else
#error
#endif

#ifdef A
    int x = y(w);
#else
    int x = z(w);
#endif

    x++;

I would like to always use the path where B is defined (-DB) but still analyse the code when A is defined and not defined, e.g. not to report that y() and z() and not used. Is it possible to do that with one command? Or do I have to add ifdef around y() and z() functions and run cppcheck twice on all my project, once with -DB -DA and the other time with -DB -UA?

Note that I quickly tried with -DA and -UA at the same time but then I think I had a situation where A is defined and not defined at the same time! Leading in this example at the situation where x is not defined at all. I quickly tried that with cppcheck 1.67 (on Debian Jessie).

Thanks!
Matt

[Daniel Marjamäki]

hmm that code is not handled well by Cppcheck we'll need to look at that.

I created one ticket to improve Preprocessor::getConfigs():
http://trac.cppcheck.net/ticket/8092

[matttbe]

Hi Daniel,

Thank you for your reply (sorry for the delay, I didn't get any notification).

Thank you for the ticket!

Cheers,
Matt