<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<HTML>
<HEAD>
<META NAME="Generator" CONTENT="MS Exchange Server version 6.5.7226.0">
<TITLE>Re: RS: [Beowulf] Sempron compile optimization</TITLE>
</HEAD>
<BODY>
<DIV id=idOWAReplyText43087 dir=ltr>
<DIV dir=ltr><FONT size=2>>Do I understand you correctly here? Why not
use x86_64 FC 4 on an<BR>>x86_64 box? Of course running i686 binaries,
libraries, and so on won't<BR>>give you top performance, and in that case you
ARE de facto<BR>>cross-compiling -- for your native
architecture.<BR></FONT></DIV>
<DIV dir=ltr><FONT size=2>The point is making sure x86-64 binaries are better --
for my </FONT></DIV>
<DIV dir=ltr><FONT size=2>code. They are. Now I'll surely take your suggestion
and go for </FONT></DIV>
<DIV dir=ltr><FONT size=2>the 64-bit version of FC4.</DIV></FONT><FONT
size=2></FONT></DIV>
<DIV dir=ltr><FONT size=2>
<DIV dir=ltr><BR>>Again, it was my understanding that if you run an x86_64
version of a<BR>>distro, the kernel, the libraries, and the applications are
all compiled<BR>>with gcc which is ITSELF compiled for that architecture, and
gcc<BR>>defaults to doing the right thing and linking the right
libraries<BR>>automagically. In fact if anything, the trick is to get
i386 apps to<BR>>run -- that requires that the libraries be loaded and
linkable, not that<BR>>easy to manage when the default library is
x86_64.<BR>><BR>> rgb<BR></DIV>
<DIV dir=ltr>Also not easy if you're running a mix of 32-bit and 64-bit versions
of the </DIV>
<DIV dir=ltr>Semperon. They coexist, as another list member pointed out. On
the </DIV>
<DIV dir=ltr>exact same motherboards and hardware in my case. I'm looking for a
</DIV>
<DIV dir=ltr>transparent management solution, though may end up with two
system</DIV>
<DIV dir=ltr>images.</DIV>
<DIV dir=ltr> </DIV>
<DIV dir=ltr> </DIV>
<DIV dir=ltr>Thanks everybody for your helpful comments,</DIV>
<DIV dir=ltr>Alan Ward</DIV>
<DIV dir=ltr> </DIV>
<DIV dir=ltr> </DIV>
<DIV dir=ltr> </DIV></FONT></DIV>
</BODY>
</HTML>