debug strange behavior

Why my debugger doesn't go sequentially in the code?

Sometimes it goes back (i am not talking about loops). and than continue.

for example:
iResult = sitalRt_DataBlock_Create(uiDeviceID, DataBlockID, sitalRtDataBlockType_DOUBLE, &DataWordsBuffer[0], 32);
printf("\n\r sitalRt_DataBlock_Create:%i",iResult);

It goes from iResults to printf, and then go back to iResults. it happen in many places.

Thanks in advanced.
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Which debugger are you using? Are you using it with debug or release build code? How you got any optimisations enabled?
I am using g++

In the highest optimization level. But seems like the reason for those jumps is
because i uses static variables
Many compiler optimizations affect debugging. Consider using -Og


Optimize debugging experience. -Og should be the optimization level of choice for the standard edit-compile-debug cycle, offering a reasonable level of optimization while maintaining fast compilation and a good debugging experience. It is a better choice than -O0 for producing debuggable code because some compiler passes that collect debug information are disabled at -O0.
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