clang options question

[Scott Bennett]

     From looking at the clang(1) man page, it is not clear to me what the
difference is between the -arch option and the -march= option.  Would
someone please summarize the difference(s) for me?  Thanks much!


                                  Scott Bennett, Comm. ASMELG, CFIAG
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* Internet:       bennett at cs.niu.edu                              *
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* "A well regulated and disciplined militia, is at all times a good  *
* objection to the introduction of that bane of all free governments *
* -- a standing army."                                               *
*    -- Gov. John Hancock, New York Journal, 28 January 1790         *
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