Fix compilation when disabling debugger support.

samples/lineprocessor.cc

 // Copyright 2012 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 13 matching lines @@
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 
 // This controls whether this sample is compiled with debugger support.
 // You may trace its usages in source text to see what parts of program
 // are responsible for debugging support.
 // Note that V8 itself should be compiled with enabled debugger support
 // to have it all working.
-#define SUPPORT_DEBUGGING
+#ifdef ENABLE_DEBUGGER_SUPPORT
+# define SUPPORT_DEBUGGING
+#endif
 
 #include <v8.h>
 
 #ifdef SUPPORT_DEBUGGING
 #include <v8-debug.h>
 #endif
 
 #include <fcntl.h>
 #include <string.h>
 #include <stdio.h>
@@ skipping 393 matching lines @@
   }
   // Remove newline char
   for (char* pos = buffer; *pos != '\0'; pos++) {
     if (*pos == '\n') {
       *pos = '\0';
       break;
     }
   }
   return v8::String::New(buffer);
 }