Index: mozilla/configure.in
===================================================================
--- mozilla.orig/configure.in
+++ mozilla/configure.in
@@ -1084,7 +1084,7 @@ case "$OS_TEST" in
     CPU_ARCH=x86
     ;;
 
-powerpc64 | ppc64)
+powerpc64 | ppc64 | powerpc64le | ppc64le)
     CPU_ARCH=ppc64
     ;;
 
Index: mozilla/js/src/configure.in
===================================================================
--- mozilla.orig/js/src/configure.in
+++ mozilla/js/src/configure.in
@@ -915,7 +915,7 @@ case "$OS_TEST" in
     CPU_ARCH=x86
     ;;
 
-powerpc64 | ppc64)
+powerpc64 | ppc64 | powerpc64le | ppc64le)
     CPU_ARCH=ppc64
     ;;
 
Index: mozilla/mfbt/Endian.h
===================================================================
--- mozilla.orig/mfbt/Endian.h
+++ mozilla/mfbt/Endian.h
@@ -91,7 +91,7 @@
 #  else
 #    error "CPU type is unknown"
 #  endif
-#elif defined(__APPLE__)
+#elif defined(__APPLE__) || defined(__powerpc__) || defined(__ppc__)
 #  if __LITTLE_ENDIAN__
 #    define MOZ_LITTLE_ENDIAN 1
 #  elif __BIG_ENDIAN__
@@ -119,8 +119,7 @@
  * cases.
  */
 #elif defined(__sparc) || defined(__sparc__) || \
-      defined(_POWER) || defined(__powerpc__) || \
-      defined(__ppc__) || defined(__hppa) || \
+      defined(_POWER) || defined(__hppa) || \
       defined(_MIPSEB) || defined(__ARMEB__) || \
       defined(__s390__) || \
       (defined(__sh__) && defined(__LITTLE_ENDIAN__)) || \
Index: mozilla/js/src/jscpucfg.h
===================================================================
--- mozilla.orig/js/src/jscpucfg.h
+++ mozilla/js/src/jscpucfg.h
@@ -31,7 +31,7 @@
 # define JS_BYTES_PER_WORD   4
 # define JS_BITS_PER_WORD_LOG2   5
 
-#elif defined(__APPLE__)
+#elif defined(__APPLE__) || defined(__powerpc__) || defined(__ppc__)
 # if __LITTLE_ENDIAN__
 #  define IS_LITTLE_ENDIAN 1
 #  undef  IS_BIG_ENDIAN
@@ -93,8 +93,7 @@
 # endif
 
 #elif defined(__sparc) || defined(__sparc__) || \
-      defined(_POWER) || defined(__powerpc__) || \
-      defined(__ppc__) || defined(__hppa) || \
+      defined(_POWER) || defined(__hppa) || \
       defined(_MIPSEB) || defined(_BIG_ENDIAN)
 /* IA64 running HP-UX will have _BIG_ENDIAN defined.
  * IA64 running Linux will have endian.h and be handled above.
Index: mozilla/js/src/assembler/wtf/Platform.h
===================================================================
--- mozilla.orig/js/src/assembler/wtf/Platform.h
+++ mozilla/js/src/assembler/wtf/Platform.h
@@ -165,16 +165,22 @@
     || defined(__POWERPC__) \
     || defined(_M_PPC)      \
     || defined(__PPC)
+#if !defined(__ppc64__) && !defined(__PPC64__)
 #define WTF_CPU_PPC 1
+#endif
+#if !defined(__LITTLE_ENDIAN__)
 #define WTF_CPU_BIG_ENDIAN 1
 #endif
+#endif
 
 /* WTF_CPU_PPC64 - PowerPC 64-bit */
 #if   defined(__ppc64__) \
     || defined(__PPC64__)
 #define WTF_CPU_PPC64 1
+#if !defined(__LITTLE_ENDIAN__)
 #define WTF_CPU_BIG_ENDIAN 1
 #endif
+#endif
 
 /* WTF_CPU_SH4 - SuperH SH-4 */
 #if defined(__SH4__)
Index: mozilla/nsprpub/pr/include/md/_linux.cfg
===================================================================
--- mozilla.orig/nsprpub/pr/include/md/_linux.cfg
+++ mozilla/nsprpub/pr/include/md/_linux.cfg
@@ -29,8 +29,13 @@
 
 #ifdef __powerpc64__
 
+#ifdef __LITTLE_ENDIAN__
+#define IS_LITTLE_ENDIAN 1
+#undef  IS_BIG_ENDIAN
+#else
 #undef  IS_LITTLE_ENDIAN
 #define IS_BIG_ENDIAN    1
+#endif
 #define IS_64
 
 #define PR_BYTES_PER_BYTE   1
@@ -75,8 +80,13 @@
 
 #elif defined(__powerpc__)
 
+#ifdef __LITTLE_ENDIAN__
+#define IS_LITTLE_ENDIAN 1
+#undef  IS_BIG_ENDIAN
+#else
 #undef  IS_LITTLE_ENDIAN
 #define IS_BIG_ENDIAN    1
+#endif
 
 #define PR_BYTES_PER_BYTE   1
 #define PR_BYTES_PER_SHORT  2
Index: mozilla/media/webrtc/trunk/webrtc/typedefs.h
===================================================================
--- mozilla.orig/media/webrtc/trunk/webrtc/typedefs.h
+++ mozilla/media/webrtc/trunk/webrtc/typedefs.h
@@ -52,13 +52,23 @@
 #elif defined(__powerpc64__)
 #define WEBRTC_ARCH_PPC64 1
 #define WEBRTC_ARCH_64_BITS 1
+#ifdef __LITTLE_ENDIAN__
+#define WEBRTC_ARCH_LITTLE_ENDIAN
+#define WEBRTC_LITTLE_ENDIAN
+#else
 #define WEBRTC_ARCH_BIG_ENDIAN
 #define WEBRTC_BIG_ENDIAN
+#endif
 #elif defined(__ppc__) || defined(__powerpc__)
 #define WEBRTC_ARCH_PPC 1
 #define WEBRTC_ARCH_32_BITS 1
+#ifdef __LITTLE_ENDIAN__
+#define WEBRTC_ARCH_LITTLE_ENDIAN
+#define WEBRTC_LITTLE_ENDIAN
+#else
 #define WEBRTC_ARCH_BIG_ENDIAN
 #define WEBRTC_BIG_ENDIAN
+#endif
 #elif defined(__sparc64__)
 #define WEBRTC_ARCH_SPARC 1
 #define WEBRTC_ARCH_64_BITS 1