From 40967a5c0b975f3f3ec1538a820985aa61b65b8f Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 9 Jan 2014 11:46:26 +0000
Subject: configure.in: use SSE2

* configure.in: use SSE2 instructions to drop unexpected precisions on
  other than mingw.  [ruby-core:59472] [Bug #8358]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44538 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog    | 5 +++++
 configure.in | 9 ++++++++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 7ec6eec2fb..9ba337ff73 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Jan  9 20:46:22 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* configure.in: use SSE2 instructions to drop unexpected precisions on
+	  other than mingw.  [ruby-core:59472] [Bug #8358]
+
 Thu Jan  9 20:31:10 2014  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* hash.c (rb_objid_hash): should return `long'.  brushup r44534.
diff --git a/configure.in b/configure.in
index f9e9431640..9c95cc4d8a 100644
--- a/configure.in
+++ b/configure.in
@@ -802,7 +802,6 @@ if test "$GCC" = yes; then
       # various  headers.  Most frequent  situation is  the use  of //
       # comments.   We  bypass  ANSI   C  mode  for  them.   Otherwise
       # extension libs cannot include those headers.
-      RUBY_TRY_CFLAGS(-msse2 -mfpmath=sse, [RUBY_APPEND_OPTION(XCFLAGS, -msse2 -mfpmath=sse)])
     ],
     [cygwin*|darwin*|netbsd*], [
       # need lgamma_r(), finite()
@@ -858,6 +857,14 @@ if test "$GCC" = yes; then
     for oflag in -fno-fast-math; do
 	RUBY_TRY_CFLAGS($oflag, [RUBY_APPEND_OPTION(optflags, $oflag)])
     done
+    AS_CASE(["$target"],
+	[*-darwin*], [
+	    # doesn't seem necessary on Mac OS X
+	],
+	[i[4-6]86], [
+	    RUBY_TRY_CFLAGS(-msse2 -mfpmath=sse, [RUBY_APPEND_OPTION(XCFLAGS, -msse2 -mfpmath=sse)])
+	]
+    )
 fi
 
 AC_ARG_WITH(opt-dir,
-- 
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