configure.in: Always add -mieee for Renesas SH4

SH4 is CPU for embedded which developed by Renesas Electronics.
Renesas SH4 has FPU. When FPU is used on sh4, -mieee of option is necessary.
This supports sh4(basic), sh4el(sh4 little endian) and sh4eb(sh4 big endian).
These do not have FPU though there are other sh4al, sh4al-dsp and etc.

[Feature #3874] [ruby-core:32548]



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@29340 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Sat Sep 25 10:05:49 2010  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
+
+	* configure.in: Always add -mieee for Renesas SH4.
+	Thanks, Nobuhiro Iwamatsu. [Feature #3874] [ruby-core:32548]
+
 Sat Sep 25 01:34:41 2010  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* Makefile.in (install-cross): target to install cross-compiling

configure.in

@@ -991,7 +991,7 @@ if test "${enable_win95}" = yes; then
 fi
 
 AS_CASE(["$target_cpu"],
-[alpha*], [AS_CASE(["$target_os"::"$GCC"],
+[alpha*|sh4|sh4el|sh4eb], [AS_CASE(["$target_os"::"$GCC"],
 		[*::yes],  # gcc
 			[CFLAGS="-mieee $CFLAGS"],
 		[osf*],    # ccc