Contribution of PowerPC port.

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index e09f773a97abb56fc83d1d5306dbced5148690f2..e5b7fb44728500cff1ca62f98efee255ff1b9287 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -81,6 +81,7 @@ class Debugger;
 
 #if !defined(__arm__) && V8_TARGET_ARCH_ARM || \
     !defined(__aarch64__) && V8_TARGET_ARCH_ARM64 || \
+    !defined(__PPC__) && V8_TARGET_ARCH_PPC || \
     !defined(__mips__) && V8_TARGET_ARCH_MIPS || \
     !defined(__mips__) && V8_TARGET_ARCH_MIPS64
 class Redirection;
@@ -294,6 +295,7 @@ class ThreadLocalTop BASE_EMBEDDED {
 
 #if V8_TARGET_ARCH_ARM && !defined(__arm__) || \
     V8_TARGET_ARCH_ARM64 && !defined(__aarch64__) || \
+    V8_TARGET_ARCH_PPC && !defined(__PPC__) || \
     V8_TARGET_ARCH_MIPS && !defined(__mips__) || \
     V8_TARGET_ARCH_MIPS64 && !defined(__mips__)
 
@@ -394,6 +396,7 @@ class Isolate {
           thread_state_(NULL),
 #if !defined(__arm__) && V8_TARGET_ARCH_ARM || \
     !defined(__aarch64__) && V8_TARGET_ARCH_ARM64 || \
+    !defined(__PPC__) && V8_TARGET_ARCH_PPC || \
     !defined(__mips__) && V8_TARGET_ARCH_MIPS || \
     !defined(__mips__) && V8_TARGET_ARCH_MIPS64
           simulator_(NULL),
@@ -409,6 +412,7 @@ class Isolate {
 
 #if !defined(__arm__) && V8_TARGET_ARCH_ARM || \
     !defined(__aarch64__) && V8_TARGET_ARCH_ARM64 || \
+    !defined(__PPC__) && V8_TARGET_ARCH_PPC || \
     !defined(__mips__) && V8_TARGET_ARCH_MIPS || \
     !defined(__mips__) && V8_TARGET_ARCH_MIPS64
     FIELD_ACCESSOR(Simulator*, simulator)
@@ -426,6 +430,7 @@ class Isolate {
 
 #if !defined(__arm__) && V8_TARGET_ARCH_ARM || \
     !defined(__aarch64__) && V8_TARGET_ARCH_ARM64 || \
+    !defined(__PPC__) && V8_TARGET_ARCH_PPC || \
     !defined(__mips__) && V8_TARGET_ARCH_MIPS || \
     !defined(__mips__) && V8_TARGET_ARCH_MIPS64
     Simulator* simulator_;