Removal of ICC (intel compiler) bits from mk

[David Schultz]

On Wed, Aug 18, 2010, Rui Paulo wrote:
> Hi,
> I've been chatting with the ICC ex-users and they seem to be ok with the removal of the ICC bits from share/mk and other places. 
> The reason is that it doesn't work and no one has volunteered to fix it for many years. This seems to indicate that the interest in ICC is low. 
> If there's anyone against this, speak now or forever be silent. :-)

For what it's worth, I still occasionally use icc for simple
tasks-- mainly as a reference for code generation, since it
produces reasonable output in many cases where gcc does not.
As I recall, making it work required minimal changes... possibly
just making sure __va_list gets defined in _types.h.  I have
the following in one of my trees, although this is obviously
not the right fix.

Index: _types.h
===================================================================
--- _types.h	(revision 219357)
+++ _types.h	(working copy)
@@ -105,7 +105,7 @@
  */
 #ifdef __GNUCLIKE_BUILTIN_VARARGS
 typedef	__builtin_va_list	__va_list;	/* internally known to gcc */
-#elif defined(lint)
+#else
 typedef	char *			__va_list;	/* pretend */
 #endif
 #if defined(__GNUC_VA_LIST_COMPATIBILITY) && !defined(__GNUC_VA_LIST) \