cppcheck compilation fails in AIX due to missing functions

[Reshma V Kumar]

Hi All,
During the compilation of cppcheck in AIX using gcc compiler, I encountered the following errors:
1.

 /home/buildusr/reshma/cppcheck/cli/processexecutor.cpp: In member function 'bool ProcessExecutor::checkLoadAverage(size_t)':
 /home/buildusr/reshma/cppcheck/cli/processexecutor.cpp:288:9: error: 'getloadavg' was not declared in this scope
   288 |     if (getloadavg(&sample, 1) != 1) {
       |         ^~~~~~~~~~

2.

 /home/buildusr/reshma/cppcheck/test/signal/test-signalhandler.cpp:60:9: error: 'feenableexcept' was not declared in this scope; did you mean 'feraiseexcept'?
    60 |     if (feenableexcept(FE_ALL_EXCEPT) == -1)
       |         ^~~~~~~~~~~~~~

3.

 /home/buildusr/reshma/cppcheck/test/signal/test-signalhandler.cpp: In function 'int main(int, const char* const*)':
 /home/buildusr/reshma/patch_contribution/cppcheck/test/signal/test-signalhandler.cpp:85:16: error: 'my_fpe' was not declared in this scope
    85 |         return my_fpe();

4.
g++: error: unrecognized command-line option '-rdynamic'

In AIX, getloadavg, feenablexcept and my_fpe functions are not available. Also, -rdynamic option is not supported. Attempting to use these results in the above errors.
Attached a patch that checks whether the platform is AIX before making use of these functions and -rdynamic flag. With these changes, I am able to successfully compile cppcheck in AIX.
Please let me know your suggestions on these changes and if any further information is required.

[CHR]

Are you able to open a PR at https://github.com/danmar/cppcheck/pulls?

[Reshma V Kumar]

Yes, I am able to open PR.
https://github.com/danmar/cppcheck/pull/7856