diff --git a/ChangeLog b/ChangeLog
index 80b34476c4..14e12932ea 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Tue Jun 24 04:54:46 2003  Minero Aoki  <aamine@loveruby.net>
+
+	* configure.in: always add -mieee for gcc/alpha. [ruby-dev:20429]
+
 Tue Jun 24 02:40:09 2003  Nobuyoshi Nakada  <nobu.nokada@softhome.net>
 
 	* array.c (rb_ary_unshift_m): need to check number of arguments.
@@ -5,7 +9,7 @@ Tue Jun 24 02:40:09 2003  Nobuyoshi Nakada  <nobu.nokada@softhome.net>
 
 Mon Jun 23 23:59:56 2003  Minero Aoki  <aamine@loveruby.net>
 
-	* io.c (io_close): missing prototype.
+	* io.c (io_close): missing prototype. [ruby-dev:20422]
 
 	* ext/socket/socket.c (bsock_do_not_rev_lookup_set): ditto.
 
diff --git a/configure.in b/configure.in
index 789c21cb63..ec6abaef71 100644
--- a/configure.in
+++ b/configure.in
@@ -328,24 +328,19 @@ freebsd*)	LIBS="-lm $LIBS"
 			fi
 		fi
 		;;
-linux*)		LIBS="-lm $LIBS"
-		case "$target_cpu" in
-		alpha*)
-		    CFLAGS="-mieee $CFLAGS" ;;
-		esac ;;
-osf*)		LIBS="-lm $LIBS"
-		case "$target_cpu"::"$GCC" in
-		alpha*::yes)
-		    CFLAGS="-mieee $CFLAGS" ;;
-		alpha*::no|alpha*::)
-		    CFLAGS="-ieee $CFLAGS" ;;
-		esac ;;
 *) LIBS="-lm $LIBS";;
 esac
 AC_CHECK_LIB(crypt, crypt)
 AC_CHECK_LIB(dl, dlopen)	# Dynamic linking for SunOS/Solaris and SYSV
 AC_CHECK_LIB(dld, shl_load)	# Dynamic linking for HP-UX
 
+case "$target_cpu" in
+alpha*)		case "$target_os"::"$GCC" in
+		*::yes)	CFLAGS="-mieee $CFLAGS" ;;   # gcc
+		osf*)   CFLAGS="-ieee $CFLAGS" ;;    # ccc
+		esac ;;
+esac
+
 dnl Checks for header files.
 AC_HEADER_DIRENT
 AC_HEADER_STDC