Ensure we correctly identify a 64-bit build and
use "amd64" and "sparcv9" for the 64-bit cpu string.
Changes were developed in-house, are Solaris specific, 
and are not suitable for upstream.

diff -ru ruby-1.9.3-p484-orig//tool/config.guess ruby-1.9.3-p484/tool/config.guess
--- ruby-1.9.3-p484-orig//tool/config.guess	Sat Sep 25 18:25:34 2010
+++ ruby-1.9.3-p484/tool/config.guess	Tue Feb 25 15:36:05 2014
@@ -331,25 +331,18 @@
 	echo sparc-hal-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
 	exit ;;
     sun4*:SunOS:5.*:* | tadpole*:SunOS:5.*:*)
-	echo sparc-sun-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
+	# Check CFLAGS for the 64-bit compile option to set the arch
+	SUN_ARCH="sparc"
+	echo $CFLAGS | /usr/gnu/bin/grep -q -w '\-m64' && SUN_ARCH="sparcv9"
+	echo ${SUN_ARCH}-sun-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
 	exit ;;
     i86pc:AuroraUX:5.*:* | i86xen:AuroraUX:5.*:*)
 	echo i386-pc-auroraux${UNAME_RELEASE}
 	exit ;;
     i86pc:SunOS:5.*:* | i86xen:SunOS:5.*:*)
-	eval $set_cc_for_build
 	SUN_ARCH="i386"
-	# If there is a compiler, see if it is configured for 64-bit objects.
-	# Note that the Sun cc does not turn __LP64__ into 1 like gcc does.
-	# This test works for both compilers.
-	if [ "$CC_FOR_BUILD" != 'no_compiler_found' ]; then
-	    if (echo '#ifdef __amd64'; echo IS_64BIT_ARCH; echo '#endif') | \
-		(CCOPTS= $CC_FOR_BUILD -E - 2>/dev/null) | \
-		grep IS_64BIT_ARCH >/dev/null
-	    then
-		SUN_ARCH="x86_64"
-	    fi
-	fi
+	# Check CFLAGS for the 64-bit compile option to set the arch
+	echo $CFLAGS | /usr/gnu/bin/grep -q -w '\-m64' && SUN_ARCH="amd64"
 	echo ${SUN_ARCH}-pc-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
 	exit ;;
     sun4*:SunOS:6*:*)
diff -ru ruby-1.9.3-p484-orig//tool/config.sub ruby-1.9.3-p484/tool/config.sub
--- ruby-1.9.3-p484-orig//tool/config.sub	Sun Oct  3 08:06:23 2010
+++ ruby-1.9.3-p484/tool/config.sub	Tue Feb 25 15:54:21 2014
@@ -431,7 +431,7 @@
 		basic_machine=x86_64-pc
 		;;
 	amd64-*)
-		basic_machine=x86_64-`echo $basic_machine | sed 's/^[^-]*-//'`
+		# don't change basic_machine
 		;;
 	amdahl)
 		basic_machine=580-amdahl