Fix compilation for ARMv4.

src/platform-linux.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 272 matching lines @@
 
 void OS::Abort() {
   // Redirect to std abort to signal abnormal program termination.
   abort();
 }
 
 
 void OS::DebugBreak() {
 // TODO(lrn): Introduce processor define for runtime system (!= V8_ARCH_x,
 //  which is the architecture of generated code).
-#if (defined(__arm__) || defined(__thumb__)) && \
-    defined(CAN_USE_ARMV5_INSTRUCTIONS)
+#if (defined(__arm__) || defined(__thumb__))
+# if defined(CAN_USE_ARMV5_INSTRUCTIONS)
   asm("bkpt 0");
+# endif
 #elif defined(__mips__)
   asm("break");
 #else
   asm("int $3");
 #endif
 }
 
 
 class PosixMemoryMappedFile : public OS::MemoryMappedFile {
  public:
@@ skipping 548 matching lines @@
 
   // This sampler is no longer the active sampler.
   active_sampler_ = NULL;
   active_ = false;
 }
 
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal