diff -up xulrunner-17.0/mozilla-release/gfx/ycbcr/chromium_types.h.chromium-types xulrunner-17.0/mozilla-release/gfx/ycbcr/chromium_types.h
--- xulrunner-17.0/mozilla-release/gfx/ycbcr/chromium_types.h.chromium-types	2012-11-16 20:56:29.000000000 +0100
+++ xulrunner-17.0/mozilla-release/gfx/ycbcr/chromium_types.h	2012-11-20 09:19:14.843448418 +0100
@@ -30,7 +30,11 @@ typedef int16_t int16;
 #define ARCH_CPU_ARM_FAMILY 1
 #define ARCH_CPU_ARMEL 1
 #define ARCH_CPU_32_BITS 1
-#elif defined(__ppc__) || defined(__powerpc) || defined(__PPC__)
+#elif defined(__powerpc64__)
+#define ARCH_CPU_PPC_FAMILY 1
+#define ARCH_CPU_PPC 1
+#define ARCH_CPU_64_BITS 1
+#elif defined(__ppc__) || defined(__powerpc__) || defined(__PPC__)
 #define ARCH_CPU_PPC_FAMILY 1
 #define ARCH_CPU_PPC 1
 #define ARCH_CPU_32_BITS 1
@@ -42,6 +46,14 @@ typedef int16_t int16;
 #define ARCH_CPU_SPARC_FAMILY 1
 #define ARCH_CPU_SPARC 1
 #define ARCH_CPU_64_BITS 1
+#elif defined(__s390x__)
+#define ARCH_CPU_S390_FAMILY 1
+#define ARCH_CPU_S390 1
+#define ARCH_CPU_64_BITS 1
+#elif defined(__s390__)
+#define ARCH_CPU_S390_FAMILY 1
+#define ARCH_CPU_S390 1
+#define ARCH_CPU_32_BITS 1
 #else
 #warning Please add support for your architecture in chromium_types.h
 #endif