Index: llvm/trunk/utils/gn/secondary/llvm/include/llvm/Config/BUILD.gn
===================================================================
--- llvm/trunk/utils/gn/secondary/llvm/include/llvm/Config/BUILD.gn
+++ llvm/trunk/utils/gn/secondary/llvm/include/llvm/Config/BUILD.gn
@@ -92,6 +92,7 @@
     "HAVE_STRERROR=1",
     "HAVE_SYS_STAT_H=1",
     "HAVE_SYS_TYPES_H=1",
+    "HAVE_VALGRIND_VALGRIND_H=",
     "HAVE__ALLOCA=",
     "HAVE___ALLOCA=",
     "HAVE___ASHLDI3=",
@@ -152,12 +153,6 @@
     ]
   }
 
-  if (current_os == "linux") {
-    values += [ "HAVE_VALGRIND_VALGRIND_H=1" ]
-  } else {
-    values += [ "HAVE_VALGRIND_VALGRIND_H=" ]
-  }
-
   if (current_os == "mac") {
     values += [
       "HAVE_CRASHREPORTER_INFO=1",