- Add a "#error Unsupported target architecture." where needed. A chain of

  platform dependent ifdefs is useless if it does not include an error like
  this. You will end up searching for the failure in all the wrong places.
Review URL: http://codereview.chromium.org/150026

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2298 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/codegen.h

@@ -77,6 +77,8 @@ enum OverwriteMode { NO_OVERWRITE, OVERWRITE_LEFT, OVERWRITE_RIGHT };
 #include "x64/codegen-x64.h"
 #elif V8_TARGET_ARCH_ARM
 #include "arm/codegen-arm.h"
+#else
+#error Unsupported target architecture.
 #endif
 
 #include "register-allocator.h"

src/execution.cc

@@ -38,6 +38,8 @@
 #include "x64/simulator-x64.h"
 #elif V8_TARGET_ARCH_ARM
 #include "arm/simulator-arm.h"
+#else
+#error Unsupported target architecture.
 #endif
 
 #include "debug.h"

src/frames-inl.h

@@ -36,6 +36,8 @@
 #include "x64/frames-x64.h"
 #elif V8_TARGET_ARCH_ARM
 #include "arm/frames-arm.h"
+#else
+#error Unsupported target architecture.
 #endif
 
 namespace v8 {

src/jsregexp.cc

@@ -51,6 +51,8 @@
 #include "x64/regexp-macro-assembler-x64.h"
 #elif V8_TARGET_ARCH_ARM
 #include "arm/regexp-macro-assembler-arm.h"
+#else
+#error Unsupported target architecture.
 #endif
 
 #include "interpreter-irregexp.h"

src/macro-assembler.h

@@ -47,6 +47,8 @@
 #include "arm/assembler-arm-inl.h"
 #include "code.h"  // must be after assembler_*.h
 #include "arm/macro-assembler-arm.h"
+#else
+#error Unsupported target architecture.
 #endif
 
 #endif  // V8_MACRO_ASSEMBLER_H_

src/platform-macos.cc

@@ -507,7 +507,7 @@ static void ProfilerSignalHandler(int signal, siginfo_t* info, void* context) {
 #endif  // __DARWIN_UNIX03
 #else
 #error Unsupported Mac OS X host architecture.
-#endif  // V8_TARGET_ARCH_IA32
+#endif  // V8_HOST_ARCH_IA32
   }
 
   // We always sample the VM state.

src/virtual-frame.h

@@ -37,6 +37,8 @@
 #include "x64/virtual-frame-x64.h"
 #elif V8_TARGET_ARCH_ARM
 #include "arm/virtual-frame-arm.h"
+#else
+#error Unsupported target architecture.
 #endif
 
 #endif  // V8_VIRTUAL_FRAME_H_