fixed #14158 - Disable the use of getloadavg(), my_fpe(), feenableexcept() and -rdynamic in AIX

[reshmavk]

In AIX, getloadavg, feenableexcept and my_fpe are not available. In addition, -rdynamic flag is not supported. This results in compilation errors in AIX and this patch fixes it.
For more information please refer the discussion : https://sourceforge.net/p/cppcheck/discussion/development/thread/f7bad36f1f/

[firewave]

Thanks for your contribution.

Could you also verify that a make build with RDYNAMIC= works? Thanks.

[firewave]

Side note for future cleanup: there is https://cmake.org/cmake/help/latest/module/CheckLinkerFlag.html which allows us to check if a linker option is available - but it was only added in CMake 3.18.

[firewave]

Oh, and please add the name you want to be credited with to the AUTHORS file.

[reshmavk]

I have made the requested changes.
I also tried make build with RDYNAMIC= , but this didn't help in resolving the error.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[danmar]

It looks good to me but I would like approval from @firewave also

[firewave]

I also tried make build with RDYNAMIC= , but this didn't help in resolving the error.

What error are you referring to?

[reshmavk]

The compilation fails with the error g++: error: unrecognized command-line option '-rdynamic' since -rdynamic is not supported in AIX.

[firewave]

Strange.

I did some tests and make RDYNAMIC= should work. Please be aware that RDYNAMIC= make does not work (potentially a shortcoming which will look into with future changes).

[firewave]

I did some tests and make RDYNAMIC= should work. Please be aware that RDYNAMIC= make does not work (potentially a shortcoming which will look into with future changes).

The shortcoming is being addressed by an external submission: #7877

[danmar]

#7877 has been merged.. does make RDYNAMIC= work better now?