[lfs-support] Glibc and -march=i486 option

Bruce Dubbs bruce.dubbs at gmail.com
Mon Apr 9 13:09:35 PDT 2012


ante wrote:
> Well, I try to ask it once more. Can anybody explain (or give me a link to
> relevant discussion) why glibc should be compiled with -march=i486 option?
> I remember that in LFS 5.0 it was recommended to clear CFLAGS and CXXFLAGS
> during compilation; but why it is recommended -march=i486 option now?

To make it consistent for 32-bit intel platforms.  There are very few 
differences in the instruction set between i486 and later.  Building for 
an i686 would probably break if run on an i486 and there would be no 
significant performance improvements.

   -- Bruce



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