My question is related to CMAKE_*_FLAGS.
I've got a project under linux fedora 24 and, in release mode, this project 
compiles with the -O2 flag.
But when I switched to other platform (ubuntu, fedora 16 - I now this one is 
quite old but I need to compile on this platform), this default optimization 
flag changes. On some platform, it's -O3.
And because with -O3 flag some "risky" optimizations are enabled, my project 
hangs ...

Is it normal to have such a variations in default optimization flags in release 
mode ?

Best regards,


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