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Then [FILE]gcc[/FILE] will set [FILE]-march=native[/FILE] and [FILE]-O2[/FILE] right? Is this simple tuning option enough for a decent output code? May I set [FILE]-O3[/FILE]? I'm confused because some books I've read said that using [FILE]-03[/FILE] will break some ports and the compiler sometimes doesn't detect the right processor, but they were written two or three years ago.
Thank you, English is not my first language.