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Re: Recent libstdc++ regression on i686-linux: abi/cxx_runtime_only_linkage.cc
On Wed, 27 Aug 2008, Joe Buck wrote:
> Joseph again:
> > > operations. (And I hold that i686-* should mean -march=i686 default not
> > > -mcpu=i386 and similarly x86_64-* -m32 should default to -march=x86_64,
> > > subject to --with-arch etc. in both cases.)
>
> I'm not keen on moving the default -march all the way to i686, as there
> are still enough old machines out there that this could cause
> inconvenience.
Users of those systems should configure for i586-linux-gnu or
i486-linux-gnu not i686-linux-gnu. config.guess should select such a
target automatically in the case of a native build. (If you configure
glibc for i686-linux-gnu, it will use assembly sources that require i686.)
--
Joseph S. Myers
joseph@codesourcery.com