Contribution of PowerPC port.

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index c0376aeac0bf4a7cf7922daae6603a67265d7f59..74edaa90fb016aa1cf87b1e3e82911eec4b7d55d 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -82,6 +82,7 @@ class PromiseOnStack;
 
 #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;
@@ -299,6 +300,7 @@ 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__)
 
@@ -398,6 +400,7 @@ 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),
@@ -413,6 +416,7 @@ 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)
@@ -430,6 +434,7 @@ 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_;