Well, support for more target architectures, really.  I can easily imagine cases where a compiler could have multiple backends for the same target arch, so the number of backends <i>could</i> be misleading in that regard.<p>For a summary from the OpenBSD perspective, see here:  <a href="http:&#x2F;&#x2F;marc.info&#x2F;?l=openbsd-misc&amp;m=137530560232232&amp;w=2" rel="nofollow">http:&#x2F;&#x2F;marc.info&#x2F;?l=openbsd-misc&amp;m=137530560232232&amp;w=2</a>