defaults for -march and -mtune

Jay Foad
Thu Nov 24 12:50:00 GMT 2011

If I don't specify any -march= or -mtune= options, what are the
default architectures to generate code for and to tune for? Can I get
the compiler to tell me this information?

The documentation here doesn't seem to say anything about it:

I'm using "gcc (Ubuntu/Linaro 4.6.1-9ubuntu3) 4.6.1" targetting x86_64.


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