Require GCC 4.3 or later to build glibc

[David Miller]

From: "Joseph S. Myers" <joseph@codesourcery.com>
Date: Thu, 23 Feb 2012 22:12:43 +0000 (UTC)

> There are a few tests that need to be overridden when bootstrapping cross 
> tools because they try to link with standard libraries or otherwise do 
> things that don't work before you already have libc for the target.  
> Those I do intend in due course to remove or weaken (given that all 
> supported compilers and binutils should pass the tests) to make such 
> bootstraps easier.  But first I want to do some experiments to see what 
> binutils versions actually work, and update that configure test / 
> documentation accordingly.  (The configure test is for 2.13 or later, the 
> documentation says 2.15 or later, but I doubt anything as old as 2.15 
> actually works - my guess is that something more like 2.17 to 2.20 is the 
> minimum version that is actually usable now.)

If you could get the binutils minimum version up to 2.19 I could
remove the configure test and all of the ifdefs in the sparc code for
GOTDATA relocation support.