GCC 4.x or Clang for 68k

[rdolores]

What are the major barriers to having a modern version of either of these tools on 68k Amigas? I've seen a 4.5 version of GCC as a cross-compiler for cygwin and windows. Couldn't that be used to build a more modern version of GCC for native 68k?

I guess my questions are more centered around whether or not there is something major preventing it from happening or if it's just simply not been done. Anybody toyed with this? Karlos? Someone else?

I'm not a programmer, but I recall there was a C++ compiler for the Amiga made by HiSoft in the late 1990's.  Here's a link to a review of it:  

http://www.nightvzn.net/portfolio/web/amiga_monitor/archives/2_9html/hisoftc.htm

You may find more links to it on Google.