Set the default behavior on alpha to use -mieee since the large majority of
time we want this (bad/weird things can happen with packages built without
it).

To satisfy those people who may not want -mieee forced on them all the time,
we also provide -mno-ieee.

Patch by Mike Frysinger <vapier@gentoo.org>

Note: upstream doesn't want to take this due to long standing behavior, and
because it'd make behavior across OS's inconsistent:
	https://gcc.gnu.org/ml/gcc-patches/2003-07/msg02144.html

This makes sense for upstream, but Gentoo is more concerned about packages
behaving the same across arches under Linux.

--- a/gcc/config/alpha/alpha.h
+++ b/gcc/config/alpha/alpha.h
@@ -96,6 +96,8 @@ along with GCC; see the file COPYING3.  If not see
   while (0)
 #endif
 
+#define CPP_SPEC "%{!no-ieee:-mieee}"
+
 /* Run-time compilation parameters selecting different hardware subsets.  */
 
 /* Which processor to schedule for. The cpu attribute defines a list that
--- a/gcc/config/alpha/alpha.opt
+++ b/gcc/config/alpha/alpha.opt
@@ -39,7 +39,7 @@ Target RejectNegative Mask(IEEE_CONFORMANT)
 Request IEEE-conformant math library routines (OSF/1)
 
 mieee
-Target Report RejectNegative Mask(IEEE)
+Target Report Mask(IEEE)
 Emit IEEE-conformant code, without inexact exceptions
 
 mieee-with-inexact