The link here Apple's gcc, what's the difference between -arch i386 and -m32? is not valid any more.
And searching on apple site is astoundingly difficult: I couldn't find it.
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How about the gcc man page? % man gcc
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Thanks will try but I'm not used to mac and linux. I prefer doc online which is more pretty and may contain more explanations :) – user310291 Dec 29 '10 at 19:35
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http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man1/gcc.1.html – echo Dec 29 '10 at 19:42
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Most (all?) man pages are available at Apple’s Web site, too: gcc man page
-arch is an Apple GCC-specific option that tells the compiler to generate code for all architectures specified with -arch, e.g. -arch i386 -arch x86_64 will produce fat binaries targeted at both 32-bit and 64-bit Intel, whereas only one of -m32, -m64 is used by the compiler.
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seems their man page doesn't seem to list the correct allowable values for -march, for instance. Odd. – rogerdpack Apr 12 '13 at 07:09