8036767: PPC64: Support for little endian execution model

Reviewed-by: ihse, erikj, simonis
Contributed-by: asmundak@google.com

common/autoconf/build-aux/config.guess

@@ -76,4 +76,14 @@ if test $? = 0; then
   OUT=powerpc$KERNEL_BITMODE`echo $OUT | sed -e 's/[^-]*//'`
 fi
 
+# Test and fix little endian PowerPC64.
+# TODO: should be handled by autoconf-config.guess. 
+if [ "x$OUT" = x ]; then
+  if [ `uname -m` = ppc64le ]; then
+    if [ `uname -s` = Linux ]; then
+      OUT=powerpc64le-unknown-linux-gnu
+    fi
+  fi
+fi
+
 echo $OUT

common/autoconf/generated-configure.sh

@@ -3868,7 +3868,7 @@ fi
 #CUSTOM_AUTOCONF_INCLUDE
 
 # Do not change or remove the following line, it is needed for consistency checks:
-DATE_WHEN_GENERATED=1395790635
+DATE_WHEN_GENERATED=1396481093
 
 ###############################################################################
 #
@@ -6830,6 +6830,12 @@ test -n "$target_alias" &&
       VAR_CPU_BITS=64
       VAR_CPU_ENDIAN=big
       ;;
+    powerpc64le)
+      VAR_CPU=ppc64
+      VAR_CPU_ARCH=ppc
+      VAR_CPU_BITS=64
+      VAR_CPU_ENDIAN=little
+      ;;
     s390)
       VAR_CPU=s390
       VAR_CPU_ARCH=s390
@@ -6955,6 +6961,12 @@ $as_echo "$OPENJDK_BUILD_OS-$OPENJDK_BUILD_CPU" >&6; }
       VAR_CPU_BITS=64
       VAR_CPU_ENDIAN=big
       ;;
+    powerpc64le)
+      VAR_CPU=ppc64
+      VAR_CPU_ARCH=ppc
+      VAR_CPU_BITS=64
+      VAR_CPU_ENDIAN=little
+      ;;
     s390)
       VAR_CPU=s390
       VAR_CPU_ARCH=s390

common/autoconf/platform.m4

@@ -60,6 +60,12 @@ AC_DEFUN([PLATFORM_EXTRACT_VARS_FROM_CPU],
       VAR_CPU_BITS=64
       VAR_CPU_ENDIAN=big
       ;;
+    powerpc64le)
+      VAR_CPU=ppc64
+      VAR_CPU_ARCH=ppc
+      VAR_CPU_BITS=64
+      VAR_CPU_ENDIAN=little
+      ;;
     s390)
       VAR_CPU=s390
       VAR_CPU_ARCH=s390